項(xiàng)目總結(jié)

最近在公司做了一個(gè)非常輕量級(jí)別的app罢荡，不過(guò)里面還是有一些知識(shí)點(diǎn)逛揩，是查了資料之后才會(huì)的辩稽，現(xiàn)在app基本做完了，整體總結(jié)一下患整。

1.獲取當(dāng)前app的一些基礎(chǔ)信息：

public static final boolean DEBUG = BuildConfig.DEBUG;

//以下是能獲取到的信息
public static final boolean DEBUG = Boolean.parseBoolean("true");
public static final String APPLICATION_ID = "com.fuyizhulao.daily_service";
public static final String BUILD_TYPE = "debug";
public static final String FLAVOR = "";
public static final int VERSION_CODE = 1;
public static final String VERSION_NAME = "1.0.0";

2.高德地圖(具體用法見(jiàn)官網(wǎng)吧各谚，文檔很詳細(xì)了)

3.個(gè)推(一個(gè)推送服務(wù)，很好用赴穗，同時(shí)它的別名機(jī)制也很人性化膀息，省著后臺(tái)再維護(hù)一套映射了)

4.Bugly(騰訊的一款崩潰統(tǒng)計(jì)潜支，異常上報(bào)的SDK，非常好配置埠对，非常的好用)

5.配置回調(diào)類(lèi)的時(shí)候裁替，可以配制成泛型的，非常的方便稍计、靈活

public interface NetWorkListener<T> {

    void onSuccess(T netWorkModel);

    void onFail(T netWorkModel);

}

6.在Fragment中想和Activity通信，可以通過(guò)EventBus進(jìn)行通信净刮，但是也不要過(guò)分依賴(lài)這個(gè)吧淹父，因?yàn)楫?dāng)過(guò)分依賴(lài)之后，整個(gè)代碼的邏輯會(huì)變得異常的復(fù)雜困介，同時(shí)發(fā)生異常之后蘸际，也是非常不好檢查的粮彤。

7.在app中無(wú)論一個(gè)網(wǎng)絡(luò)接口出現(xiàn)過(guò)幾次姜骡，最好還是統(tǒng)一的封裝起來(lái)會(huì)比較方便一點(diǎn)圈澈。

8.將Model專(zhuān)程Json字符串可以用Gson：

new Gson().toJson(new GetOrderList(
                        Integer.valueOf(MyApplication.id)
                        , state
                        , pageNum
                        , pageSize))

9.得到相機(jī)的View和控制閃光燈：

public class CameraView extends SurfaceView implements SurfaceHolder.Callback, Camera.PreviewCallback {


    private Camera mCamera;

    private int mPreviewRotation = 90;
    private int mCamId = Camera.CameraInfo.CAMERA_FACING_BACK;
    private PreviewCallback mPrevCb;
    private byte[] mYuvPreviewFrame;
    private int previewWidth;
    private int previewHeight;

    private Camera.Parameters params;

    public interface PreviewCallback {
        void onGetYuvFrame(byte[] data);
    }

    public CameraView(Context context) {
        this(context, null);
    }

    public CameraView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public void setPreviewRotation(int rotation) {
        mPreviewRotation = rotation;
    }

    public void setCameraId(int id) {
        mCamId = id;
    }

    public int getCameraId() {
        return mCamId;
    }

    public void setPreviewCallback(PreviewCallback cb) {
        mPrevCb = cb;
        getHolder().addCallback(this);
    }

    public void setPreviewResolution(int width, int height) {
        previewWidth = width;
        previewHeight = height;
    }

    public boolean startCamera() {
        if (mCamera != null) {
            return false;
        }
        if (mCamId > (Camera.getNumberOfCameras() - 1) || mCamId < 0) {
            return false;
        }

        mCamera = Camera.open(mCamId);

        params = mCamera.getParameters();
        Camera.Size size = mCamera.new Size(previewWidth, previewHeight);

        mYuvPreviewFrame = new byte[previewWidth * previewHeight * 3 / 2];

        params.setPreviewSize(previewWidth, previewHeight);

        params.setPreviewFormat(ImageFormat.NV21);

        List<String> supportedFocusModes = params.getSupportedFocusModes();

        if (!supportedFocusModes.isEmpty()) {
            if (supportedFocusModes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
                params.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
            }
        }

        mCamera.setParameters(params);

        mCamera.setDisplayOrientation(mPreviewRotation);

        mCamera.addCallbackBuffer(mYuvPreviewFrame);
        mCamera.setPreviewCallbackWithBuffer(this);
        try {
            mCamera.setPreviewDisplay(getHolder());
        } catch (IOException e) {
            e.printStackTrace();
        }
        mCamera.startPreview();

        return true;
    }

    public void stopCamera() {
        if (mCamera != null) {
            mCamera.setPreviewCallback(null);
            mCamera.stopPreview();
            mCamera.release();
            mCamera = null;
        }
    }

    @Override
    public void onPreviewFrame(byte[] data, Camera camera) {
        mPrevCb.onGetYuvFrame(data);
        camera.addCallbackBuffer(mYuvPreviewFrame);
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
    }

    @Override
    public void surfaceCreated(SurfaceHolder arg0) {
        if (mCamera != null) {
            try {
                mCamera.setPreviewDisplay(getHolder());
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder arg0) {
    }

    public void isOpenLight(boolean isOpen) {
        if (isOpen) {
            params.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
            mCamera.setParameters(params);
        } else {
            params.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
            mCamera.setParameters(params);
        }
    }

}

10.Notification

NotificationManager mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this);
mBuilder.setContentTitle(title)//設(shè)置通知欄標(biāo)題
        .setContentIntent(getDefalutIntent(Notification.FLAG_AUTO_CANCEL)) //設(shè)置通知欄點(diǎn)擊意圖
        .setNumber(number) //設(shè)置通知集合的數(shù)量
        .setTicker(title) //通知首次出現(xiàn)在通知欄喷橙，帶上升動(dòng)畫(huà)效果的
        .setWhen(System.currentTimeMillis())//通知產(chǎn)生的時(shí)間，會(huì)在通知信息里顯示饥臂，一般是系統(tǒng)獲取到的時(shí)間
        .setPriority(Notification.PRIORITY_DEFAULT) //設(shè)置該通知優(yōu)先級(jí)
        .setAutoCancel(true)//設(shè)置這個(gè)標(biāo)志當(dāng)用戶(hù)單擊面板就可以讓通知將自動(dòng)取消
        .setOngoing(false)//ture似踱，設(shè)置他為一個(gè)正在進(jìn)行的通知核芽。他們通常是用來(lái)表示一個(gè)后臺(tái)任務(wù),用戶(hù)積極參與(如播放音樂(lè))或以某種方式正在等待,因此占用設(shè)備(如一個(gè)文件下載,同步操作,主動(dòng)網(wǎng)絡(luò)連接)
        .setDefaults(Notification.DEFAULT_VIBRATE)//向通知添加聲音、閃燈和振動(dòng)效果的最簡(jiǎn)單驰坊、最一致的方式是使用當(dāng)前的用戶(hù)默認(rèn)設(shè)置哮独，使用defaults屬性皮璧，可以組合
        //Notification.DEFAULT_ALL  Notification.DEFAULT_SOUND 添加聲音 // requires VIBRATE permission
        .setSmallIcon(R.mipmap.ic_launcher);//設(shè)置通知小ICON
mNotificationManager.notify(1, mBuilder.build());

11.沉浸式狀態(tài)欄

這是一個(gè)第三方庫(kù)，用起來(lái)挺方便的睹限，有空應(yīng)該擼一遍它的源碼

compile 'com.readystatesoftware.systembartint:systembartint:1.0.3'

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
//透明狀態(tài)欄            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
//透明導(dǎo)航欄getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
SystemBarTintManager tintManager = new SystemBarTintManager(this);
// 激活狀態(tài)欄
tintManager.setStatusBarTintEnabled(true);
// enable navigation bar tint 激活導(dǎo)航欄
//tintManager.setNavigationBarTintEnabled(true);
//設(shè)置系統(tǒng)欄設(shè)置顏色
//tintManager.setTintColor(R.color.red);
//給狀態(tài)欄設(shè)置顏色
tintManager.setStatusBarTintResource(R.color.normal_blue);
//Apply the specified drawable or color resource to the system navigation bar.
//給導(dǎo)航欄設(shè)置資源
//tintManager.setNavigationBarTintResource(R.color.normal_blue);
}

android:fitsSystemWindows="true"
android:clipToPadding="true"

12.利用反射動(dòng)態(tài)調(diào)節(jié)tablayout的長(zhǎng)度

public void setIndicator(TabLayout tabs, int leftDip, int rightDip) {
        Class<?> tabLayout = tabs.getClass();
        Field tabStrip = null;
        try {
            tabStrip = tabLayout.getDeclaredField("mTabStrip");
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        }

        tabStrip.setAccessible(true);
        LinearLayout llTab = null;
        try {
            llTab = (LinearLayout) tabStrip.get(tabs);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }

        int left = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, leftDip, Resources.getSystem().getDisplayMetrics());
        int right = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, rightDip, Resources.getSystem().getDisplayMetrics());

        for (int i = 0; i < llTab.getChildCount(); i++) {
            View child = llTab.getChildAt(i);
            child.setPadding(0, 0, 0, 0);
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.MATCH_PARENT, 1);
            params.leftMargin = left;
            params.rightMargin = right;
            child.setLayoutParams(params);
            child.invalidate();
        }

    }

13.驗(yàn)證碼倒計(jì)時(shí)

mTimeCount = new TimeCount(60000, 1000);
mTimeCount.start();

class TimeCount extends CountDownTimer {
        public TimeCount(long millisInFuture, long countDownInterval) {
            super(millisInFuture, countDownInterval);
        }

        @Override
        public void onFinish() {// 計(jì)時(shí)完畢
            mGetCode.setText("獲取驗(yàn)證碼");
            mGetCode.setClickable(true);
        }

        @Override
        public void onTick(long millisUntilFinished) {// 計(jì)時(shí)過(guò)程
            mGetCode.setClickable(false);//防止重復(fù)點(diǎn)擊
            mGetCode.setText(String.valueOf(millisUntilFinished / 1000) + "秒后重發(fā)");
        }
    }

14.downloadManager工具類(lèi)

public class DownloadUtils {

    private DownloadManager mDownloadManager;
    private Context mContext;
    private long downloadId;
    private String apkName;

    public DownloadUtils(Context context) {
        mContext = context;
    }

    public void download(String url, String name) {
        final String packageName = "com.android.providers.downloads";
        int state = mContext.getPackageManager().getApplicationEnabledSetting(packageName);
        //檢測(cè)下載管理器是否被禁用
        if (state == PackageManager.COMPONENT_ENABLED_STATE_DISABLED
                || state == PackageManager.COMPONENT_ENABLED_STATE_DISABLED_USER
                || state == PackageManager.COMPONENT_ENABLED_STATE_DISABLED_UNTIL_USED) {
            AlertDialog.Builder builder = new AlertDialog.Builder(mContext).setTitle("溫馨提示").setMessage
                    ("系統(tǒng)下載管理器被禁止别洪，需手動(dòng)打開(kāi)").setPositiveButton("確定", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.dismiss();
                    try {
                        Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                        intent.setData(Uri.parse("package:" + packageName));
                        mContext.startActivity(intent);
                    } catch (ActivityNotFoundException e) {
                        Intent intent = new Intent(Settings.ACTION_MANAGE_APPLICATIONS_SETTINGS);
                        mContext.startActivity(intent);
                    }
                }
            }).setNegativeButton("取消", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.dismiss();
                }
            });
            builder.create().show();
        } else {
            //正常下載流程
            apkName = name;
            DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
            request.setAllowedOverRoaming(false);

            //通知欄顯示
            request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
            request.setTitle("test");
            request.setDescription("正在下載中...");
            request.setVisibleInDownloadsUi(true);

            //設(shè)置下載的路徑
            request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, apkName);

            //獲取DownloadManager
            mDownloadManager = (DownloadManager) mContext.getSystemService(Context.DOWNLOAD_SERVICE);
            downloadId = mDownloadManager.enqueue(request);

            mContext.registerReceiver(mReceiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
        }
    }

    private BroadcastReceiver mReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            checkStatus();
        }
    };

    /**
     * 檢查下載狀態(tài)
     */
    private void checkStatus() {
        DownloadManager.Query query = new DownloadManager.Query();
        query.setFilterById(downloadId);
        Cursor cursor = mDownloadManager.query(query);
        if (cursor.moveToFirst()) {
            int status = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS));
            switch (status) {
                //下載暫停
                case DownloadManager.STATUS_PAUSED:
                    break;
                //下載延遲
                case DownloadManager.STATUS_PENDING:
                    break;
                //正在下載
                case DownloadManager.STATUS_RUNNING:
                    break;
                //下載完成
                case DownloadManager.STATUS_SUCCESSFUL:
                    installAPK();
                    break;
                //下載失敗
                case DownloadManager.STATUS_FAILED:
                    Toast.makeText(mContext, "下載失敗", Toast.LENGTH_SHORT).show();
                    break;
            }
        }
        cursor.close();
    }

    /**
     * 7.0兼容
     */
    private void installAPK() {
        File apkFile =
                new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), apkName);
        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            Uri apkUri = FileProvider.getUriForFile(mContext, mContext.getPackageName() + ".provider", apkFile);
            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            intent.setDataAndType(apkUri, "application/vnd.android.package-archive");
        } else {
            intent.setDataAndType(Uri.fromFile(apkFile), "application/vnd.android.package-archive");
        }
        mContext.startActivity(intent);
    }
}

15.還有一些簡(jiǎn)單的工具類(lèi)：

public class Util {

    /**
     * 將時(shí)間戳轉(zhuǎn)換為時(shí)間
     */
    public static String stampToDate(String s) {
        String res;
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm");
        long lt = new Long(s);
        Date date = new Date(lt);
        res = simpleDateFormat.format(date);
        return res;
    }

    /**
     * 這個(gè)工具類(lèi)是為了展示出首頁(yè)那種持續(xù)的效果
     * 例如：12月21日 09:00 - 10:00
     */
    public static String stampAndDurationToDate(long serviceTime, long duration) {
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("MM月dd日 HH:mm");
        Date date = new Date(serviceTime);
        String myData = simpleDateFormat.format(date);
        Date date2 = new Date(serviceTime + duration * 60 * 1000);
        String myData2 = simpleDateFormat.format(date2);
        return myData + "-" + myData2.split(" ")[1];
    }


    /**
     * 這個(gè)工具類(lèi)是為了將時(shí)間戳轉(zhuǎn)換成訂單上面的時(shí)間
     * 例如：2016-12-21 09:00-10:00
     */
    public static String stampAndDurationToDateForOrder(long serviceTime, long duration) {
        String date1 = stampToDate(String.valueOf(serviceTime));
        String date2 = stampToDate(String.valueOf(serviceTime + duration * 60 * 1000));
        return date1 + "-" + date2.split(" ")[1];
    }





    /**
     * bitmap轉(zhuǎn)file
     */

    public static File saveBitmapFile(Bitmap bitmap) {
        File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath()+"/img.png");//將要保存圖片的路徑
        try {
            BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(file));
            bitmap.compress(Bitmap.CompressFormat.PNG, 100, bos);
            bos.flush();
            bos.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return file;
    }

}

16.cardView的點(diǎn)擊效果

android:foreground="@drawable/card_view_select"

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@color/normal_white" android:state_pressed="false"> </item>
    <item android:drawable="@color/press_white" android:state_pressed="true"> </item>

</selector>