相機(jī)是我們最常用的手機(jī)應(yīng)用之一，這里只是實(shí)現(xiàn)幾個簡單的功能厦画、拍照疮茄、延時拍照、錄像根暑、圖片查看力试、靜態(tài)人臉識別等。
1排嫌、這里主要使用surfaceView實(shí)現(xiàn)畸裳，首先打開攝像頭實(shí)現(xiàn)預(yù)覽，在surfaceCreated中添加
/**
* 啟動預(yù)覽
*/
private void startPreview() {
if (mCamera != null || !mIsSurfaceCreated) {
return;
}
mCamera = Camera.open(0);
Camera.Parameters parameters = mCamera.getParameters();
int width = getResources().getDisplayMetrics().widthPixels;
int height = getResources().getDisplayMetrics().heightPixels;
Camera.Size size = getBestPreviewSize(width, height, parameters);
parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
parameters.setPreviewFrameRate(20);
mCamera.setDisplayOrientation(90);
mCamera.setParameters(parameters);
try {
mCamera.setPreviewDisplay(mHolder);
} catch (Exception e) {
e.printStackTrace();
}
mCamera.startPreview();
}
2淳地、實(shí)現(xiàn)預(yù)覽后躯畴，實(shí)現(xiàn)拍照要先實(shí)現(xiàn)Camera.PictureCallback接口，然后使用mCamera.takePicture(null, null, null, MainActivity.this);實(shí)現(xiàn)拍照薇芝，然后保存到手機(jī)上
@Override
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream fos = null;
try {
String fileName = System.currentTimeMillis() + ".png";
fos = new FileOutputStream(new File(filePath + File.separator + fileName));
videoPath = filePath + File.separator + fileName;
Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
Matrix matrix = new Matrix();
matrix.setRotate(90);
bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, fos);
ivPicture.setImageBitmap(bitmap);
new FaceThread(bitmap).start();
fos.flush();
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
Toast.makeText(getApplication(), "拍照成功", Toast.LENGTH_SHORT).show();
//拍照后重新預(yù)覽
mCamera.startPreview();
}
關(guān)于延時拍照只需加個定時器就可以了具體需要延時多久可根據(jù)實(shí)際需要設(shè)置蓬抄，下面定時器代碼，
Handler handler = new Handler();
Runnable runnable = new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
//要做的事情
count++;
countDown--;
btnDelay.setText(countDown + " s");
handler.postDelayed(this, 1000);
if (countDown == 0) {
mCamera.takePicture(null, null, null, MainActivity.this);
btnDelay.setText("3s");
handler.removeCallbacksAndMessages(null);
}
tvTime.setText(count + " s");
}
};
啟動定時器代碼夯到，當(dāng)點(diǎn)擊3s再點(diǎn)擊拍照就可以實(shí)現(xiàn)延時拍照功能
handler.postDelayed(runnable, 1000);
3嚷缭、實(shí)現(xiàn)簡單攝像功能，主要使用mediaRecorder耍贾，錄像完保存到跟圖片同樣路徑下阅爽，代碼中有詳細(xì)注釋
/**
* 錄像
*/
private void videotape() {
if (isVideoStart) {
count = 0;
btnDelay.setVisibility(View.GONE);
tvTime.setVisibility(View.VISIBLE);
handler.postDelayed(runnable, 1000);//每兩秒執(zhí)行一次runnable.
btnVideo.setBackgroundResource(R.drawable.video_recoder);
isVideoStart = false;
mediarecorder = new MediaRecorder();
mCamera = Camera.open(Camera.CameraInfo.CAMERA_FACING_BACK);
if (mCamera != null) {
mCamera.setDisplayOrientation(90);
mCamera.unlock();
mediarecorder.setCamera(mCamera);
}
//設(shè)置視頻源
mediarecorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
//設(shè)置音頻源
mediarecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
//設(shè)置文件輸出格式
mediarecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
//設(shè)置視頻編碼方式
mediarecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
//設(shè)置音頻編碼方式
mediarecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
//設(shè)置視頻高和寬,注意文檔的說明:
//Must be called after setVideoSource().
//Call this after setOutFormat() but before prepare().
//設(shè)置錄制的視頻幀率,注意文檔的說明:
//Must be called after setVideoSource().
//Call this after setOutFormat() but before prepare().
mediarecorder.setVideoSize(800, 480);
mediarecorder.setVideoFrameRate(20);
mediarecorder.setAudioChannels(2);
//設(shè)置預(yù)覽畫面
mediarecorder.setPreviewDisplay(mHolder.getSurface());
//設(shè)置輸出路徑
// videoPath = Environment.getExternalStorageDirectory() + File.separator + System.currentTimeMillis() + ".mp4";
videoPath = "/mnt/sdcard/DCIM/Camera" + File.separator + System.currentTimeMillis() + ".mp4";
mediarecorder.setOutputFile(videoPath);
try {
// 準(zhǔn)備錄制
mediarecorder.prepare();
// 開始錄制
mediarecorder.start();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} else {
tvTime.setText("");
btnDelay.setVisibility(View.VISIBLE);
btnDelay.setText("3 s");
//ivPicture.setImageURI(Uri.fromFile(new File(videoPath)));
ivPicture.setImageBitmap(getVideoThumbnail(videoPath));
Log.e(TAG, "videoPath=" + videoPath);
handler.removeCallbacksAndMessages(null);
btnVideo.setBackgroundResource(R.drawable.ic_switch_video);
isVideoStart = true;
if (mediarecorder != null) {
// 停止錄制
mediarecorder.stop();
// 釋放資源
mediarecorder.release();
mediarecorder = null;
}
if (mCamera != null) {
// mCamera.release();
}
Toast.makeText(getApplication(), "視頻已保存到" + videoPath + "下", Toast.LENGTH_SHORT).show();
}
}
4、實(shí)現(xiàn)切換前后攝像頭
/**
* 切換前后攝像頭
*/
private void changeCamera() {
int cameraCount = 0;
Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
cameraCount = Camera.getNumberOfCameras();//得到攝像頭的個數(shù)
for (int i = 0; i < cameraCount; i++) {
Camera.getCameraInfo(i, cameraInfo);//得到每一個攝像頭的信息
if (cameraPosition == 1) {
//現(xiàn)在是后置荐开，變更為前置
//代表攝像頭的方位付翁，CAMERA_FACING_FRONT 前置 CAMERA_FACING_BACK后置
if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_BACK) {
mCamera.stopPreview();//停掉原來攝像頭的預(yù)覽
mCamera.release();//釋放資源
mCamera = null;//取消原來攝像頭
mCamera = Camera.open(i);//打開當(dāng)前選中的攝像頭
try {
mCamera.setPreviewDisplay(mHolder);//通過surfaceview顯示取景畫面
mCamera.setDisplayOrientation(90);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mCamera.startPreview();//開始預(yù)覽
cameraPosition = 0;
break;
}
} else {
if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
mCamera.stopPreview();
mCamera.release();
mCamera = null;
mCamera = Camera.open(i);
try {
mCamera.setPreviewDisplay(mHolder);
mCamera.setDisplayOrientation(90);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mCamera.startPreview();
cameraPosition = 1;
break;
}
}
}
}
5、實(shí)現(xiàn)點(diǎn)擊屏幕出現(xiàn)方框聚焦功能晃听，首先我們先寫一個自定的view來繪制一個正方形
package com.example.apple.camera.view;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.view.View;
import com.example.apple.camera.R;
/**
*
*/
public class MyView extends View {
private Paint mPaint;
private Canvas mCanvas;
private int x;
private int y;
private Bitmap mBitmap;
public MyView(Context context) {
super(context);
}
public MyView(Context context, AttributeSet attrs) {
super(context, attrs);
mPaint = new Paint();
mPaint.setTypeface(Typeface.defaultFromStyle(Typeface.BOLD));
mPaint.setColor(Color.BLUE);
mPaint.setAntiAlias(true);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
this.mCanvas = canvas;
// setDrawRect(400,400);
if (mBitmap==null){
mBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.border);
}
Bitmap mm = Bitmap.createScaledBitmap(mBitmap,200,200,true);
canvas.drawBitmap(mm,x,y,mPaint);
}
public void setX(int x) {
this.x = x;
invalidate();
}
public void setY(int y) {
this.y = y;
invalidate();
}
public Bitmap getmBitmap() {
return mBitmap;
}
public void setmBitmap(Bitmap mBitmap) {
this.mBitmap = mBitmap;
invalidate();
}
public void setDrawRect(int x, int y) {
Bitmap mBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.border);
mCanvas.drawBitmap(mBitmap,x,y,mPaint);
}
}
使用的時候就在onTouchEvent中實(shí)現(xiàn)百侧，首先要現(xiàn)在布局中隱藏，當(dāng)要使用的時候顯示出來能扒，再設(shè)置要顯示的位置佣渴，顯示位置通過觸摸屏幕當(dāng)前位置來獲取，然后當(dāng)聚焦實(shí)現(xiàn)后可以通過定時器來延時幾秒消失初斑，這里僅實(shí)現(xiàn)聚焦完后就隱藏辛润，這就簡單實(shí)現(xiàn)了點(diǎn)擊聚焦功能
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
focusOnTouch(event);
myRect.setVisibility(View.VISIBLE);
int x = (int) event.getX();
int y = (int) event.getY();
myRect.setX(x - 100);
myRect.setY(y - 300);
//Log.e(TAG,"x="+x+" y="+y);
mCamera.autoFocus(new Camera.AutoFocusCallback() {
@Override
public void onAutoFocus(boolean success, Camera camera) {
if (success) {
Bitmap mBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.border1);
myRect.setmBitmap(mBitmap);
myRect.setVisibility(View.GONE);
}
}
});
break;
}
return super.onTouchEvent(event);
}
6、設(shè)置拍照圖片大小见秤，先獲取手機(jī)支持什么那些規(guī)格的砂竖，然后再設(shè)置真椿，否則可能會出錯，不同手機(jī)可能不一樣
List<Camera.Size> pszize = parameters.getSupportedPictureSizes();
if (null != pszize && 0 < pszize.size()) {
int height1[] = new int[pszize.size()];
Map<Integer, Integer> map = new HashMap<Integer, Integer>();
for (int i = 0; i < pszize.size(); i++) {
Camera.Size size1 = (Camera.Size) pszize.get(i);
int sizeheight = size1.height;
int sizewidth = size1.width;
height1[i] = sizeheight;
map.put(sizeheight, sizewidth);
//Log.e(TAG,"size.width="+sizewidth + " size.height="+sizeheight);
}
Arrays.sort(height1);
parameters.setPictureSize(map.get(height1[12]), height1[12]);
如果報(bào)錯可以注釋掉設(shè)置預(yù)覽圖片大小和設(shè)置拍照圖片大小
parameters.setPreviewSize(size.width, size.height);
// parameters.setPictureSize(size.width, size.height);
7乎澄、關(guān)于設(shè)置錄像的清晰度和幀率可以設(shè)置下面參數(shù)
mediarecorder.setVideoSize(800, 480);
mediarecorder.setVideoFrameRate(20);
8突硝、實(shí)現(xiàn)簡單的人臉識別，這里只能靜態(tài)識別三圆，動態(tài)識別因?yàn)轭A(yù)覽回調(diào)回來的圖片太大狞换，無法處理避咆，可對著一張人臉拍照后可以預(yù)覽到實(shí)際效果舟肉，照片會存儲到手機(jī)上
class FaceThread extends Thread {
private Bitmap mBitmap;
public FaceThread(Bitmap bitmap) {
this.mBitmap = bitmap;
}
@Override
public void run() {
FaceDetector.Face[] faces = new FaceDetector.Face[5];
//格式必須為RGB_565才可以識別
Bitmap bitmap = mBitmap.copy(Bitmap.Config.RGB_565, true);
final int faceCount = new FaceDetector(bitmap.getWidth(), bitmap.getHeight(), 5).findFaces(bitmap, faces);
bitmap.recycle();
if (faceCount > 0) {
final Bitmap bmp = parseBitmap(faces, faceCount, mBitmap);
runOnUiThread(new Runnable() {
@Override
public void run() {
ivPicture.setImageBitmap(bmp);
File file = new File(filePath, System.currentTimeMillis() + ".jpg");
if (file.exists()) {
file.delete();
}
try {
FileOutputStream fo = new FileOutputStream(file);
bmp.compress(Bitmap.CompressFormat.JPEG, 90, fo);
fo.flush();
fo.close();
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
}
}
/**
* 在人臉上畫矩形
*/
private Bitmap parseBitmap(FaceDetector.Face[] faces, int faceCount, Bitmap mFaceBitmap) {
Bitmap bitmap = Bitmap.createBitmap(mFaceBitmap.getWidth(), mFaceBitmap.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mPaint.setAntiAlias(true);
mPaint.setColor(Color.YELLOW);
mPaint.setStrokeWidth(5);
mPaint.setStyle(Paint.Style.STROKE);
canvas.drawBitmap(mFaceBitmap, 0, 0, mPaint);
for (int i = 0; i < faceCount; i++) {
//雙眼的中心點(diǎn)
PointF midPoint = new PointF();
faces[i].getMidPoint(midPoint);
//雙眼的距離
float eyeDistance = faces[i].eyesDistance();
//畫矩形
canvas.drawRect(midPoint.x - eyeDistance, midPoint.y - eyeDistance, midPoint.x + eyeDistance, midPoint.y + eyeDistance, mPaint);
myRect.setY(midPoint.x + eyeDistance);
myRect.setX(midPoint.y + eyeDistance);
}
return bitmap;
}
9、關(guān)于拍照后的圖片和錄制的視頻的顯示查库，通過路徑查找到所有的文件數(shù)據(jù)保存路媚，然后傳入顯示，具體可看代碼
/**
* 查詢獲取圖片文件
* @param path
* @return
*/
private ArrayList<String> queryImage(String path){
ArrayList<String> filePath = new ArrayList<>();
if (!TextUtils.isEmpty(path)){
File file = new File(path);
File[] files = file.listFiles();
if (files!=null){
if (!file.exists())
return null;
for (File f : files){
if (getFileType(f)==IMAGE || getFileType(f) == VIDEO){
filePath.add(f.getPath());
}
}
}
}
return filePath;
}
public static int getFileType(File f) {
int type = -1;
String fileName = f.getName();
String ext = fileName.substring(fileName.lastIndexOf(".")
+ 1, fileName.length()).toLowerCase();
if (ext.equals("mp3") || ext.equals("amr") || ext.equals("wma")
|| ext.equals("aac") || ext.equals("m4a") || ext.equals("mid")
|| ext.equals("xmf") || ext.equals("ogg") || ext.equals("wav")
|| ext.equals("qcp") || ext.equals("awb")|| ext.equals("3gpp")|| ext.equals("ape")|| ext.equals("flac")||ext.equals("midi")) {
type = MUSIC;
}
else if (ext.equals("3gp") || ext.equals("avi") || ext.equals("mp4")
|| ext.equals("3g2") || ext.equals("wmv") || ext.equals("divx")
|| ext.equals("mkv") || ext.equals("webm") || ext.equals("ts")
|| ext.equals("asf")|| ext.equals("mov")||ext.equals("mpg")||ext.equals("flv") ) {
type = VIDEO;
}
else if (ext.equals("jpg") || ext.equals("jpeg") || ext.equals("gif")
|| ext.equals("png") || ext.equals("bmp")||ext.equals("wbmp")) {
type = IMAGE;
}
else if (ext.equals("doc") || ext.equals("docx") || ext.equals("xls")
|| ext.equals("xlsx") || ext.equals("ppt") || ext.equals("pptx")
|| ext.equals("txt") || ext.equals("text") || ext.equals("pdf")|| ext.equals("html")) {
type = DOC;
}
else if (ext.equals("rar") || ext.equals("zip") || ext.equals("tar") || ext.equals("gz")
|| ext.equals("iso") || ext.equals("jar") || ext.equals("cab") || ext.equals("7z")
|| ext.equals("ace")) {
type = ZIP;
}
else if (ext.equals("apk")) {
type = APK;
}
else {
type = OTHER;
}
return type;
}
完整代碼
package com.example.apple.camera.showpicture;
import android.app.Activity;
import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import com.bumptech.glide.Glide;
import com.example.apple.camera.R;
import com.example.apple.camera.view.ZoomImageView;
import java.io.File;
import java.util.ArrayList;
/**
* Created by 550211 on 2017/9/7.
*/
public class ImageShowActivity extends Activity {
private ViewPager mViewPager;
private TextView tvFileCount;
private ImageView ivPlay;
public static final int IMAGE = 0;
public static final int VIDEO = 4;
public static final int MUSIC = 5;
public static final int DOC = 6;
public static final int ZIP=7;
public static final int APK = 8;
public static final int OTHER =9;
private ArrayList<String> allImageFile = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_image_show);
initView();
}
private void initView() {
allImageFile = queryImage("/mnt/sdcard/DCIM/Camera");
final ImageView[] mImageViews = new ImageView[allImageFile.size()];
tvFileCount = (TextView)findViewById(R.id.tv_file_count);
ivPlay = (ImageView)findViewById(R.id.iv_play);
mViewPager = (ViewPager) findViewById(R.id.id_viewpager);
mViewPager.setAdapter(new PagerAdapter() {
@Override
public Object instantiateItem(ViewGroup container, int position) {
ZoomImageView imageView = new ZoomImageView(getApplicationContext());
File file = new File(allImageFile.get(position));
Glide.with(getApplication())
.load(file)
.centerCrop()
.into(imageView);
container.addView(imageView);
tvFileCount.setText(position+"/"+allImageFile.size());
Log.e("ImageShowActivity","position="+file.getPath());
mImageViews[position] = imageView;
if (getFileType(file) == VIDEO){
ivPlay.setVisibility(View.VISIBLE);
}else {
ivPlay.setVisibility(View.GONE);
}
return imageView;
}
@Override
public void destroyItem(ViewGroup container, int position,
Object object) {
container.removeView(mImageViews[position]);
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == arg1;
}
@Override
public int getCount() {
return allImageFile.size();
}
});
}
/**
* 查詢獲取圖片文件
* @param path
* @return
*/
private ArrayList<String> queryImage(String path){
ArrayList<String> filePath = new ArrayList<>();
if (!TextUtils.isEmpty(path)){
File file = new File(path);
File[] files = file.listFiles();
if (files!=null){
if (!file.exists())
return null;
for (File f : files){
if (getFileType(f)==IMAGE || getFileType(f) == VIDEO){
filePath.add(f.getPath());
}
}
}
}
return filePath;
}
public static int getFileType(File f) {
int type = -1;
String fileName = f.getName();
String ext = fileName.substring(fileName.lastIndexOf(".")
+ 1, fileName.length()).toLowerCase();
if (ext.equals("mp3") || ext.equals("amr") || ext.equals("wma")
|| ext.equals("aac") || ext.equals("m4a") || ext.equals("mid")
|| ext.equals("xmf") || ext.equals("ogg") || ext.equals("wav")
|| ext.equals("qcp") || ext.equals("awb")|| ext.equals("3gpp")|| ext.equals("ape")|| ext.equals("flac")||ext.equals("midi")) {
type = MUSIC;
}
else if (ext.equals("3gp") || ext.equals("avi") || ext.equals("mp4")
|| ext.equals("3g2") || ext.equals("wmv") || ext.equals("divx")
|| ext.equals("mkv") || ext.equals("webm") || ext.equals("ts")
|| ext.equals("asf")|| ext.equals("mov")||ext.equals("mpg")||ext.equals("flv") ) {
type = VIDEO;
}
else if (ext.equals("jpg") || ext.equals("jpeg") || ext.equals("gif")
|| ext.equals("png") || ext.equals("bmp")||ext.equals("wbmp")) {
type = IMAGE;
}
else if (ext.equals("doc") || ext.equals("docx") || ext.equals("xls")
|| ext.equals("xlsx") || ext.equals("ppt") || ext.equals("pptx")
|| ext.equals("txt") || ext.equals("text") || ext.equals("pdf")|| ext.equals("html")) {
type = DOC;
}
else if (ext.equals("rar") || ext.equals("zip") || ext.equals("tar") || ext.equals("gz")
|| ext.equals("iso") || ext.equals("jar") || ext.equals("cab") || ext.equals("7z")
|| ext.equals("ace")) {
type = ZIP;
}
else if (ext.equals("apk")) {
type = APK;
}
else {
type = OTHER;
}
return type;
}
@Override
protected void onDestroy() {
super.onDestroy();
}
}
布局實(shí)現(xiàn)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/tv_file_count"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v4.view.ViewPager
android:id="@+id/id_viewpager"
android:layout_width="fill_parent"
android:layout_height="fill_parent"></android.support.v4.view.ViewPager>
<ImageView
android:id="@+id/iv_play"
android:visibility="gone"
android:layout_centerInParent="true"
android:background="@drawable/ic_gallery_play"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
</LinearLayout>
圖片顯示view代碼
package com.example.apple.camera.view;
import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Matrix;
import android.graphics.RectF;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.ScaleGestureDetector;
import android.view.ScaleGestureDetector.OnScaleGestureListener;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.ViewTreeObserver;
import android.widget.ImageView;
/**
* @author zhy
* 博客地址：http://blog.csdn.net/lmj623565791
*/
public class ZoomImageView extends ImageView implements OnScaleGestureListener,
OnTouchListener, ViewTreeObserver.OnGlobalLayoutListener
{
private static final String TAG = ZoomImageView.class.getSimpleName();
public static final float SCALE_MAX = 4.0f;
private static final float SCALE_MID = 2.0f;
private float initScale = 1.0f;
private boolean once = true;
private final float[] matrixValues = new float[9];
private ScaleGestureDetector mScaleGestureDetector = null;
private final Matrix mScaleMatrix = new Matrix();
private GestureDetector mGestureDetector;
private boolean isAutoScale;
private int mTouchSlop;
private float mLastX;
private float mLastY;
private boolean isCanDrag;
private int lastPointerCount;
private boolean isCheckTopAndBottom = true;
private boolean isCheckLeftAndRight = true;
public ZoomImageView(Context context) {
this(context, null);
}
public ZoomImageView(Context context, AttributeSet attrs) {
super(context, attrs);
super.setScaleType(ScaleType.MATRIX);
mGestureDetector = new GestureDetector(context,
new SimpleOnGestureListener() {
@Override
public boolean onDoubleTap(MotionEvent e) {
if (isAutoScale == true)
return true;
float x = e.getX();
float y = e.getY();
Log.e("DoubleTap", getScale() + " , " + initScale);
if (getScale() < SCALE_MID) {
ZoomImageView.this.postDelayed(new AutoScaleRunnable(SCALE_MID, x, y), 16);
isAutoScale = true;
} else if (getScale() >= SCALE_MID && getScale() < SCALE_MAX) {
ZoomImageView.this.postDelayed(new AutoScaleRunnable(SCALE_MAX, x, y), 16);
isAutoScale = true;
} else {
ZoomImageView.this.postDelayed(new AutoScaleRunnable(initScale, x, y), 16);
isAutoScale = true;
}
return true;
}
});
mScaleGestureDetector = new ScaleGestureDetector(context, this);
this.setOnTouchListener(this);
}
/**
* 自動縮放的任務(wù)
*
* @author zhy
*/
private class AutoScaleRunnable implements Runnable {
static final float BIGGER = 1.07f;
static final float SMALLER = 0.93f;
private float mTargetScale;
private float tmpScale;
/**
* 縮放的中心
*/
private float x;
private float y;
/**
* 傳入目標(biāo)縮放值樊销，根據(jù)目標(biāo)值與當(dāng)前值整慎，判斷應(yīng)該放大還是縮小
*
* @param targetScale
*/
public AutoScaleRunnable(float targetScale, float x, float y) {
this.mTargetScale = targetScale;
this.x = x;
this.y = y;
if (getScale() < mTargetScale) {
tmpScale = BIGGER;
} else {
tmpScale = SMALLER;
}
}
@Override
public void run() {
// 進(jìn)行縮放
mScaleMatrix.postScale(tmpScale, tmpScale, x, y);
checkBorderAndCenterWhenScale();
setImageMatrix(mScaleMatrix);
final float currentScale = getScale();
// 如果值在合法范圍內(nèi)，繼續(xù)縮放
if (((tmpScale > 1f) && (currentScale < mTargetScale))
|| ((tmpScale < 1f) && (mTargetScale < currentScale))) {
ZoomImageView.this.postDelayed(this, 16);
} else
// 設(shè)置為目標(biāo)的縮放比例
{
final float deltaScale = mTargetScale / currentScale;
mScaleMatrix.postScale(deltaScale, deltaScale, x, y);
checkBorderAndCenterWhenScale();
setImageMatrix(mScaleMatrix);
isAutoScale = false;
}
}
}
@SuppressLint("NewApi")
@Override
public boolean onScale(ScaleGestureDetector detector) {
float scale = getScale();
float scaleFactor = detector.getScaleFactor();
if (getDrawable() == null)
return true;
/**
* 縮放的范圍控制
*/
if ((scale < SCALE_MAX && scaleFactor > 1.0f)
|| (scale > initScale && scaleFactor < 1.0f)) {
/**
* 最大值最小值判斷
*/
if (scaleFactor * scale < initScale) {
scaleFactor = initScale / scale;
}
if (scaleFactor * scale > SCALE_MAX) {
scaleFactor = SCALE_MAX / scale;
}
/**
* 設(shè)置縮放比例
*/
mScaleMatrix.postScale(scaleFactor, scaleFactor, detector.getFocusX(), detector.getFocusY());
checkBorderAndCenterWhenScale();
setImageMatrix(mScaleMatrix);
}
return true;
}
/**
* 在縮放時围苫，進(jìn)行圖片顯示范圍的控制
*/
private void checkBorderAndCenterWhenScale() {
RectF rect = getMatrixRectF();
float deltaX = 0;
float deltaY = 0;
int width = getWidth();
int height = getHeight();
// 如果寬或高大于屏幕裤园，則控制范圍
if (rect.width() >= width) {
if (rect.left > 0) {
deltaX = -rect.left;
}
if (rect.right < width) {
deltaX = width - rect.right;
}
}
if (rect.height() >= height) {
if (rect.top > 0) {
deltaY = -rect.top;
}
if (rect.bottom < height) {
deltaY = height - rect.bottom;
}
}
// 如果寬或高小于屏幕，則讓其居中
if (rect.width() < width) {
deltaX = width * 0.5f - rect.right + 0.5f * rect.width();
}
if (rect.height() < height) {
deltaY = height * 0.5f - rect.bottom + 0.5f * rect.height();
}
Log.e(TAG, "deltaX = " + deltaX + " , deltaY = " + deltaY);
mScaleMatrix.postTranslate(deltaX, deltaY);
}
/**
* 根據(jù)當(dāng)前圖片的Matrix獲得圖片的范圍
*
* @return
*/
private RectF getMatrixRectF() {
Matrix matrix = mScaleMatrix;
RectF rect = new RectF();
Drawable d = getDrawable();
if (null != d) {
rect.set(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight());
matrix.mapRect(rect);
}
return rect;
}
@Override
public boolean onScaleBegin(ScaleGestureDetector detector) {
return true;
}
@Override
public void onScaleEnd(ScaleGestureDetector detector) {
}
@Override
public boolean onTouch(View v, MotionEvent event) {
if (mGestureDetector.onTouchEvent(event))
return true;
mScaleGestureDetector.onTouchEvent(event);
float x = 0, y = 0;
// 拿到觸摸點(diǎn)的個數(shù)
final int pointerCount = event.getPointerCount();
// 得到多個觸摸點(diǎn)的x與y均值
for (int i = 0; i < pointerCount; i++) {
x += event.getX(i);
y += event.getY(i);
}
x = x / pointerCount;
y = y / pointerCount;
/**
* 每當(dāng)觸摸點(diǎn)發(fā)生變化時剂府，重置mLasX , mLastY
*/
if (pointerCount != lastPointerCount) {
isCanDrag = false;
mLastX = x;
mLastY = y;
}
lastPointerCount = pointerCount;
RectF rectF = getMatrixRectF();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
if (rectF.width() > getWidth() || rectF.height() > getHeight()) {
getParent().requestDisallowInterceptTouchEvent(true);
}
break;
case MotionEvent.ACTION_MOVE:
if (rectF.width() > getWidth() || rectF.height() > getHeight()) {
getParent().requestDisallowInterceptTouchEvent(true);
}
Log.e(TAG, "ACTION_MOVE");
float dx = x - mLastX;
float dy = y - mLastY;
if (!isCanDrag) {
isCanDrag = isCanDrag(dx, dy);
}
if (isCanDrag) {
if (getDrawable() != null) {
isCheckLeftAndRight = isCheckTopAndBottom = true;
// 如果寬度小于屏幕寬度拧揽，則禁止左右移動
if (rectF.width() < getWidth()) {
dx = 0;
isCheckLeftAndRight = false;
}
// 如果高度小雨屏幕高度，則禁止上下移動
if (rectF.height() < getHeight()) {
dy = 0;
isCheckTopAndBottom = false;
}
mScaleMatrix.postTranslate(dx, dy);
checkMatrixBounds();
setImageMatrix(mScaleMatrix);
}
}
mLastX = x;
mLastY = y;
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
Log.e(TAG, "ACTION_UP");
lastPointerCount = 0;
break;
}
return true;
}
/**
* 獲得當(dāng)前的縮放比例
*
* @return
*/
public final float getScale() {
mScaleMatrix.getValues(matrixValues);
return matrixValues[Matrix.MSCALE_X];
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
getViewTreeObserver().addOnGlobalLayoutListener(this);
}
@SuppressWarnings("deprecation")
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
getViewTreeObserver().removeGlobalOnLayoutListener(this);
}
@Override
public void onGlobalLayout() {
if (once) {
Drawable d = getDrawable();
if (d == null)
return;
Log.e(TAG, d.getIntrinsicWidth() + " , " + d.getIntrinsicHeight());
int width = getWidth();
int height = getHeight();
// 拿到圖片的寬和高
int dw = d.getIntrinsicWidth();
int dh = d.getIntrinsicHeight();
float scale = 1.0f;
// 如果圖片的寬或者高大于屏幕腺占，則縮放至屏幕的寬或者高
if (dw > width && dh <= height) {
scale = width * 1.0f / dw;
}
if (dh > height && dw <= width) {
scale = height * 1.0f / dh;
}
// 如果寬和高都大于屏幕淤袜，則讓其按按比例適應(yīng)屏幕大小
if (dw > width && dh > height) {
scale = Math.min(width * 1.0f / dw, height * 1.0f / dh);
}
initScale = scale;
Log.e(TAG, "initScale = " + initScale);
mScaleMatrix.postTranslate((width - dw) / 2, (height - dh) / 2);
mScaleMatrix.postScale(scale, scale, getWidth() / 2,
getHeight() / 2);
// 圖片移動至屏幕中心
setImageMatrix(mScaleMatrix);
once = false;
}
}
/**
* 移動時，進(jìn)行邊界判斷衰伯，主要判斷寬或高大于屏幕的
*/
private void checkMatrixBounds() {
RectF rect = getMatrixRectF();
float deltaX = 0, deltaY = 0;
final float viewWidth = getWidth();
final float viewHeight = getHeight();
if (rect.top > 0 && isCheckTopAndBottom) {
deltaY = -rect.top;
}
if (rect.bottom < viewHeight && isCheckTopAndBottom) {
deltaY = viewHeight - rect.bottom;
}
if (rect.left > 0 && isCheckLeftAndRight) {
deltaX = -rect.left;
}
if (rect.right < viewWidth && isCheckLeftAndRight) {
deltaX = viewWidth - rect.right;
}
mScaleMatrix.postTranslate(deltaX, deltaY);
}
/**
* 是否是推動行為
*
* @param dx
* @param dy
* @return
*/
private boolean isCanDrag(float dx, float dy) {
return Math.sqrt((dx * dx) + (dy * dy)) >= mTouchSlop;
}
}
相機(jī)顯示部分布局代碼
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:fresco="http://schemas.android.com/apk/res-auto"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/black"
android:orientation="vertical">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="50dp"
android:layout_marginRight="50dp"
android:gravity="center_vertical"
android:orientation="horizontal">
<Button
android:id="@+id/btn_delay"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_alignParentRight="true"
android:background="@android:color/transparent"
android:padding="10dp"
android:text="3s"
android:textColor="@android:color/white" />
<Button
android:id="@+id/btn_hdr"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_marginLeft="10dp"
android:background="@drawable/ic_flash_off_indicator"
android:padding="10dp" />
<Button
android:id="@+id/btn_camera_change"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_marginLeft="10dp"
android:background="@drawable/ic_menu_revert_holo_dark"
android:padding="10dp" />
<Button
android:id="@+id/btn_setting"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_marginLeft="10dp"
android:background="@drawable/ic_settings_normal"
android:padding="10dp" />
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<SurfaceView
android:id="@+id/surface_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
<com.example.apple.camera.view.MyView
android:id="@+id/my_rect"
android:visibility="gone"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</FrameLayout>
<TextView
android:id="@+id/tv_time"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:textColor="@android:color/holo_red_dark" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginBottom="10dp"
android:gravity="center_vertical">
<ImageView
android:layout_width="55dp"
android:layout_height="55dp"
android:layout_centerVertical="true"
android:layout_marginLeft="16dp"
android:background="@mipmap/focus_ring_touch_outer" />
<Button
android:id="@+id/btn_video"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_centerVertical="true"
android:layout_marginLeft="20dp"
android:background="@mipmap/ic_switch_video" />
<ImageView
android:layout_width="55dp"
android:layout_height="55dp"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:background="@mipmap/focus_ring_touch_outer" />
<Button
android:id="@+id/btn_take_photo"
android:layout_width="51dp"
android:layout_height="50dp"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:background="@mipmap/ic_video" />
<com.facebook.drawee.view.SimpleDraweeView
android:id="@+id/iv_picture"
android:layout_width="55dp"
android:layout_height="55dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="20dp"
android:background="@mipmap/focus_ring_touch_outer"
android:scaleType="centerCrop"
fresco:actualImageScaleType="centerInside" />
</RelativeLayout>
</LinearLayout>
完整相機(jī)功能代碼
package com.example.apple.camera;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PointF;
import android.graphics.Rect;
import android.hardware.Camera;
import android.media.FaceDetector;
import android.media.MediaMetadataRetriever;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.example.apple.camera.showpicture.ImageShowActivity;
import com.example.apple.camera.view.MyView;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import static android.content.ContentValues.TAG;
public class MainActivity extends Activity implements View.OnClickListener, SurfaceHolder.Callback, Camera.PictureCallback {
private Button btnVideo;
private Button btnTakePhoto;
private ImageView ivPicture;
private SurfaceView mySurfaceView;
private TextView tvTime;
private Button btnDelay;
private Button btnHdr;
private Button btnCameraChange;
private Button btnSetting;
private MyView myRect = null;
private String filePath = "/mnt/sdcard/DCIM/Camera";
private Camera mCamera;
private SurfaceHolder mHolder;
private boolean mIsSurfaceCreated = false;
private boolean isVideoStart = true;
private String videoPath = "";
private MediaRecorder mediarecorder;// 錄制視頻的類
private int count = 5;
private int countDown = 0;
private boolean startDelayPicture = false;
private int cameraPosition = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
initView();
}
private void initView() {
btnVideo = (Button) findViewById(R.id.btn_video);
btnVideo.setOnClickListener(this);
btnTakePhoto = (Button) findViewById(R.id.btn_take_photo);
btnTakePhoto.setOnClickListener(this);
ivPicture = (ImageView) findViewById(R.id.iv_picture);
ivPicture.setOnClickListener(this);
btnDelay = (Button) findViewById(R.id.btn_delay);
btnDelay.setOnClickListener(this);
btnHdr = (Button) findViewById(R.id.btn_hdr);
btnHdr.setOnClickListener(this);
btnCameraChange = (Button) findViewById(R.id.btn_camera_change);
btnCameraChange.setOnClickListener(this);
btnSetting = (Button) findViewById(R.id.btn_setting);
btnSetting.setOnClickListener(this);
myRect = (MyView) findViewById(R.id.my_rect);
tvTime = (TextView) findViewById(R.id.tv_time);
mySurfaceView = (SurfaceView) findViewById(R.id.surface_view);
mHolder = mySurfaceView.getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn_camera_change:
changeCamera();
break;
case R.id.btn_video:
videotape();
break;
case R.id.btn_take_photo:
if (startDelayPicture) {
handler.postDelayed(runnable, 1000);//每兩秒執(zhí)行一次runnable.
startDelayPicture = false;
} else {
mCamera.takePicture(null, null, null, MainActivity.this);
}
break;
case R.id.iv_picture:
Intent intent = new Intent(MainActivity.this, ImageShowActivity.class);
startActivity(intent);
break;
case R.id.btn_delay:
countDown = 3;
startDelayPicture = true;
tvTime.setVisibility(View.GONE);
break;
case R.id.btn_setting:
Intent intentSetting = new Intent(MainActivity.this, SettingActivity.class);
startActivity(intentSetting);
break;
case R.id.btn_hdr:
break;
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
focusOnTouch(event);
myRect.setVisibility(View.VISIBLE);
int x = (int) event.getX();
int y = (int) event.getY();
myRect.setX(x - 100);
myRect.setY(y - 300);
//Log.e(TAG,"x="+x+" y="+y);
mCamera.autoFocus(new Camera.AutoFocusCallback() {
@Override
public void onAutoFocus(boolean success, Camera camera) {
if (success) {
Bitmap mBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.border1);
myRect.setmBitmap(mBitmap);
myRect.setVisibility(View.GONE);
}
}
});
break;
}
return super.onTouchEvent(event);
}
@Override
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream fos = null;
try {
String fileName = System.currentTimeMillis() + ".png";
fos = new FileOutputStream(new File(filePath + File.separator + fileName));
videoPath = filePath + File.separator + fileName;
Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
Matrix matrix = new Matrix();
matrix.setRotate(90);
bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, fos);
ivPicture.setImageBitmap(bitmap);
new FaceThread(bitmap).start();
fos.flush();
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
Toast.makeText(getApplication(), "拍照成功", Toast.LENGTH_SHORT).show();
//拍照后重新預(yù)覽
mCamera.startPreview();
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
mIsSurfaceCreated = true;
startPreview();
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, final int width, final int height) {
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
mIsSurfaceCreated = false;
stopPreview();
}
/**
* 啟動預(yù)覽
*/
private void startPreview() {
if (mCamera != null || !mIsSurfaceCreated) {
return;
}
mCamera = Camera.open(0);
Camera.Parameters parameters = mCamera.getParameters();
int width = getResources().getDisplayMetrics().widthPixels;
int height = getResources().getDisplayMetrics().heightPixels;
Camera.Size size = getBestPreviewSize(width, height, parameters);
List<Camera.Size> pszize = parameters.getSupportedPictureSizes();
if (null != pszize && 0 < pszize.size()) {
int height1[] = new int[pszize.size()];
Map<Integer, Integer> map = new HashMap<Integer, Integer>();
for (int i = 0; i < pszize.size(); i++) {
Camera.Size size1 = (Camera.Size) pszize.get(i);
int sizeheight = size1.height;
int sizewidth = size1.width;
height1[i] = sizeheight;
map.put(sizeheight, sizewidth);
//Log.e(TAG,"size.width="+sizewidth + " size.height="+sizeheight);
}
Arrays.sort(height1);
parameters.setPictureSize(map.get(height1[12]), height1[12]);
// if (Utils.getPictureSize(getApplication())!=0){
// parameters.setPictureSize(map.get(height1[Utils.getPictureSize(getApplication())]), height1[Utils.getPictureSize(getApplication())]);
// Log.e(TAG,"size.width="+map.get(height1[Utils.getPictureSize(getApplication())]) + " size.height="+height1[Utils.getPictureSize(getApplication())]);
// }else {
// parameters.setPictureSize(size.width, size.height);
// }
}
parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
parameters.setPreviewFrameRate(20);
mCamera.setDisplayOrientation(90);
mCamera.setParameters(parameters);
try {
mCamera.setPreviewDisplay(mHolder);
} catch (Exception e) {
e.printStackTrace();
}
mCamera.startPreview();
}
/**
* 關(guān)閉預(yù)覽
*/
private void stopPreview() {
if (mCamera != null) {
try {
mCamera.setPreviewDisplay(null);
mCamera.stopPreview();
mCamera.release();
mCamera = null;
} catch (Exception e) {
Log.e(TAG, e.getMessage());
}
}
}
private Camera.Size getBestPreviewSize(int width, int height, Camera.Parameters parameters) {
Camera.Size result = null;
for (Camera.Size size : parameters.getSupportedPreviewSizes()) {
if (size.width <= width && size.height <= height) {
if (result == null) {
result = size;
} else {
int resultArea = result.width * result.height;
int newArea = size.width * size.height;
if (newArea > resultArea) {
result = size;
}
}
}
}
return result;
}
/**
* 觸摸聚焦
*
* @param event
*/
public void focusOnTouch(MotionEvent event) {
int[] location = new int[2];
mySurfaceView.getLocationOnScreen(location);
Rect focusRect = calculateTapArea(100, 100, 1f, event.getRawX(), event.getRawY(),
location[0], location[0] + mySurfaceView.getWidth(), location[1], location[1] + mySurfaceView.getHeight());
Rect meteringRect = calculateTapArea(200, 200, 1.5f, event.getRawX(), event.getRawY(),
location[0], location[0] + mySurfaceView.getWidth(), location[1], location[1] + mySurfaceView.getHeight());
Camera.Parameters parameters = mCamera.getParameters();
parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
if (parameters.getMaxNumFocusAreas() > 0) {
List<Camera.Area> focusAreas = new ArrayList<Camera.Area>();
focusAreas.add(new Camera.Area(focusRect, 1000));
parameters.setFocusAreas(focusAreas);
}
if (parameters.getMaxNumMeteringAreas() > 0) {
List<Camera.Area> meteringAreas = new ArrayList<Camera.Area>();
meteringAreas.add(new Camera.Area(meteringRect, 1000));
parameters.setMeteringAreas(meteringAreas);
}
try {
mCamera.setParameters(parameters);
} catch (Exception e) {
}
mCamera.autoFocus(null);
}
public Rect calculateTapArea(int focusWidth, int focusHeight, float areaMultiple,
float x, float y, int previewleft, int previewRight, int previewTop, int previewBottom) {
int areaWidth = (int) (focusWidth * areaMultiple);
int areaHeight = (int) (focusHeight * areaMultiple);
int centerX = (previewleft + previewRight) / 2;
int centerY = (previewTop + previewBottom) / 2;
double unitx = ((double) previewRight - (double) previewleft) / 2000;
double unity = ((double) previewBottom - (double) previewTop) / 2000;
int left = clamp((int) (((x - areaWidth / 2) - centerX) / unitx), -1000, 1000);
int top = clamp((int) (((y - areaHeight / 2) - centerY) / unity), -1000, 1000);
int right = clamp((int) (left + areaWidth / unitx), -1000, 1000);
int bottom = clamp((int) (top + areaHeight / unity), -1000, 1000);
return new Rect(left, top, right, bottom);
}
public int clamp(int x, int min, int max) {
if (x > max)
return max;
if (x < min)
return min;
return x;
}
/**
* 錄像
*/
private void videotape() {
if (isVideoStart) {
count = 0;
btnDelay.setVisibility(View.GONE);
tvTime.setVisibility(View.VISIBLE);
handler.postDelayed(runnable, 1000);//每兩秒執(zhí)行一次runnable.
btnVideo.setBackgroundResource(R.drawable.video_recoder);
isVideoStart = false;
mediarecorder = new MediaRecorder();
mCamera = Camera.open(Camera.CameraInfo.CAMERA_FACING_BACK);
if (mCamera != null) {
mCamera.setDisplayOrientation(90);
mCamera.unlock();
mediarecorder.setCamera(mCamera);
}
//設(shè)置視頻源
mediarecorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
//設(shè)置音頻源
mediarecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
//設(shè)置文件輸出格式
mediarecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
//設(shè)置視頻編碼方式
mediarecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
//設(shè)置音頻編碼方式
mediarecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
//設(shè)置視頻高和寬,注意文檔的說明:
//Must be called after setVideoSource().
//Call this after setOutFormat() but before prepare().
//設(shè)置錄制的視頻幀率,注意文檔的說明:
//Must be called after setVideoSource().
//Call this after setOutFormat() but before prepare().
mediarecorder.setVideoSize(800, 480);
mediarecorder.setVideoFrameRate(20);
mediarecorder.setAudioChannels(2);
//設(shè)置預(yù)覽畫面
mediarecorder.setPreviewDisplay(mHolder.getSurface());
//設(shè)置輸出路徑
// videoPath = Environment.getExternalStorageDirectory() + File.separator + System.currentTimeMillis() + ".mp4";
videoPath = "/mnt/sdcard/DCIM/Camera" + File.separator + System.currentTimeMillis() + ".mp4";
mediarecorder.setOutputFile(videoPath);
try {
// 準(zhǔn)備錄制
mediarecorder.prepare();
// 開始錄制
mediarecorder.start();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} else {
tvTime.setText("");
btnDelay.setVisibility(View.VISIBLE);
btnDelay.setText("3 s");
//ivPicture.setImageURI(Uri.fromFile(new File(videoPath)));
ivPicture.setImageBitmap(getVideoThumbnail(videoPath));
Log.e(TAG, "videoPath=" + videoPath);
handler.removeCallbacksAndMessages(null);
btnVideo.setBackgroundResource(R.drawable.ic_switch_video);
isVideoStart = true;
if (mediarecorder != null) {
// 停止錄制
mediarecorder.stop();
// 釋放資源
mediarecorder.release();
mediarecorder = null;
}
if (mCamera != null) {
// mCamera.release();
}
Toast.makeText(getApplication(), "視頻已保存到" + videoPath + "下", Toast.LENGTH_SHORT).show();
}
}
public Bitmap getVideoThumbnail(String filePath) {
Bitmap bitmap = null;
MediaMetadataRetriever retriever = new MediaMetadataRetriever();
try {
retriever.setDataSource(filePath);
bitmap = retriever.getFrameAtTime();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (RuntimeException e) {
e.printStackTrace();
} finally {
try {
retriever.release();
} catch (RuntimeException e) {
e.printStackTrace();
}
}
return bitmap;
}
Handler handler = new Handler();
Runnable runnable = new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
//要做的事情
count++;
countDown--;
btnDelay.setText(countDown + " s");
handler.postDelayed(this, 1000);
if (countDown == 0) {
mCamera.takePicture(null, null, null, MainActivity.this);
btnDelay.setText("3s");
handler.removeCallbacksAndMessages(null);
}
tvTime.setText(count + " s");
}
};
/**
* 切換前后攝像頭
*/
private void changeCamera() {
int cameraCount = 0;
Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
cameraCount = Camera.getNumberOfCameras();//得到攝像頭的個數(shù)
for (int i = 0; i < cameraCount; i++) {
Camera.getCameraInfo(i, cameraInfo);//得到每一個攝像頭的信息
if (cameraPosition == 1) {
//現(xiàn)在是后置铡羡，變更為前置
//代表攝像頭的方位，CAMERA_FACING_FRONT 前置 CAMERA_FACING_BACK后置
if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_BACK) {
mCamera.stopPreview();//停掉原來攝像頭的預(yù)覽
mCamera.release();//釋放資源
mCamera = null;//取消原來攝像頭
mCamera = Camera.open(i);//打開當(dāng)前選中的攝像頭
try {
mCamera.setPreviewDisplay(mHolder);//通過surfaceview顯示取景畫面
mCamera.setDisplayOrientation(90);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mCamera.startPreview();//開始預(yù)覽
cameraPosition = 0;
break;
}
} else {
if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
mCamera.stopPreview();
mCamera.release();
mCamera = null;
mCamera = Camera.open(i);
try {
mCamera.setPreviewDisplay(mHolder);
mCamera.setDisplayOrientation(90);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mCamera.startPreview();
cameraPosition = 1;
break;
}
}
}
}
class FaceThread extends Thread {
private Bitmap mBitmap;
public FaceThread(Bitmap bitmap) {
this.mBitmap = bitmap;
}
@Override
public void run() {
FaceDetector.Face[] faces = new FaceDetector.Face[5];
//格式必須為RGB_565才可以識別
Bitmap bitmap = mBitmap.copy(Bitmap.Config.RGB_565, true);
final int faceCount = new FaceDetector(bitmap.getWidth(), bitmap.getHeight(), 5).findFaces(bitmap, faces);
bitmap.recycle();
if (faceCount > 0) {
final Bitmap bmp = parseBitmap(faces, faceCount, mBitmap);
runOnUiThread(new Runnable() {
@Override
public void run() {
ivPicture.setImageBitmap(bmp);
File file = new File(filePath, System.currentTimeMillis() + ".jpg");
if (file.exists()) {
file.delete();
}
try {
FileOutputStream fo = new FileOutputStream(file);
bmp.compress(Bitmap.CompressFormat.JPEG, 90, fo);
fo.flush();
fo.close();
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
}
}
/**
* 在人臉上畫矩形
*/
private Bitmap parseBitmap(FaceDetector.Face[] faces, int faceCount, Bitmap mFaceBitmap) {
Bitmap bitmap = Bitmap.createBitmap(mFaceBitmap.getWidth(), mFaceBitmap.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mPaint.setAntiAlias(true);
mPaint.setColor(Color.YELLOW);
mPaint.setStrokeWidth(5);
mPaint.setStyle(Paint.Style.STROKE);
canvas.drawBitmap(mFaceBitmap, 0, 0, mPaint);
for (int i = 0; i < faceCount; i++) {
//雙眼的中心點(diǎn)
PointF midPoint = new PointF();
faces[i].getMidPoint(midPoint);
//雙眼的距離
float eyeDistance = faces[i].eyesDistance();
//畫矩形
canvas.drawRect(midPoint.x - eyeDistance, midPoint.y - eyeDistance, midPoint.x + eyeDistance, midPoint.y + eyeDistance, mPaint);
myRect.setY(midPoint.x + eyeDistance);
myRect.setX(midPoint.y + eyeDistance);
}
return bitmap;
}
@Override
protected void onDestroy() {
super.onDestroy();
if (handler != null) {
handler.removeCallbacksAndMessages(null);
handler = null;
}
}
}
8242E730-91BC-43C8-8D05-7F3E87CA540F.png
