前言
本文例子實(shí)現(xiàn)了點(diǎn)擊顯示懸浮窗口，同時(shí)窗口可播放視頻紧阔，拖動(dòng)位置缘挑，點(diǎn)擊關(guān)閉及返回APP頁面民珍，通過例子來講述懸浮窗口實(shí)現(xiàn)原理及細(xì)節(jié)處理，效果圖如下所示:
懸浮窗口.gif
原理
-
WindowManager對(duì)View視圖進(jìn)行添加览爵、移除、更新處理镇饮； -
WindowManager.LayoutParams對(duì)窗口參數(shù)進(jìn)行一系列設(shè)置蜓竹。
實(shí)現(xiàn)
- 首先，需要添加相對(duì)應(yīng)懸浮窗權(quán)限：
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
- 在
Activity頁面中储藐，需要判斷懸浮窗權(quán)限是否獲取俱济，如果未曾獲取，需要跳轉(zhuǎn)系統(tǒng)頁钙勃，進(jìn)行對(duì)應(yīng)的授權(quán)操作：
public boolean requestOverlayPermission() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (!Settings.canDrawOverlays(this)) {
Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION, Uri.parse("package:" + getPackageName()));
startActivityForResult(intent, REQUEST_OVERLAY_CODE);
return true;
} else {
return false;
}
}
return false;
}
-
獲取權(quán)限后蛛碌，我們可以首先初始化我們要顯示的視圖，并且設(shè)置相對(duì)應(yīng)的事件辖源，這里我們采用了
VideoView進(jìn)行簡(jiǎn)單的視頻播放蔚携，并且設(shè)置懸浮窗關(guān)閉及返回前臺(tái)的操作：private View initFloatView() { View view = View.inflate(this, R.layout.view_floating_window, null); // 設(shè)置視頻封面 final ImageView mThumb = (ImageView) view.findViewById(R.id.thumb_floating_view); Glide.with(this).load(R.drawable.thumb).into(mThumb); // 懸浮窗關(guān)閉 view.findViewById(R.id.close_floating_view).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { mFloatingWindow.dismiss(); } }); // 返回前臺(tái)頁面 view.findViewById(R.id.back_floating_view).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { mFloatingWindow.setTopApp(FloatingWindowActivity.this); } }); final VideoView videoView = view.findViewById(R.id.video_view); //視頻內(nèi)容設(shè)置 videoView.setVideoPath("https://stream7.iqilu.com/10339/article/202002/18/2fca1c77730e54c7b500573c2437003f.mp4"); // 視頻準(zhǔn)備完畢，隱藏正在加載封面克饶，顯示視頻 videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() { @Override public void onPrepared(MediaPlayer mp) { mThumb.setVisibility(View.GONE); } }); // 循環(huán)播放 videoView.setOnCompletionListener(new MediaPlayer.OnCompletionListener() { @Override public void onCompletion(MediaPlayer mp) { videoView.start(); } }); // 開始播放視頻 videoView.start(); return view; } -
通過獲取窗口管理
WindowManager酝蜒，設(shè)置懸浮窗口參數(shù)WindowManager.LayoutParams后，就可以通過WindowManager的addView方法矾湃，生成對(duì)應(yīng)視圖的懸浮窗口：public void showFloatingWindowView(Context context, View view) { // 懸浮窗顯示視圖 mShowView = view; // 獲取系統(tǒng)窗口管理服務(wù) mWindowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); // 懸浮窗口參數(shù)設(shè)置及返回 mFloatParams = getParams(); // 設(shè)置窗口觸摸移動(dòng)事件 mShowView.setOnTouchListener(new FloatViewMoveListener()); // 懸浮窗生成 mWindowManager.addView(mShowView, mFloatParams); } WindowManager.LayoutParams參數(shù)設(shè)置亡脑，主要設(shè)置懸浮窗口類型為WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY：
private WindowManager.LayoutParams getParams() {
WindowManager.LayoutParams layoutParams = new WindowManager.LayoutParams();
//設(shè)置懸浮窗口類型
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
layoutParams.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
} else {
layoutParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT;
}
//設(shè)置懸浮窗口屬性
layoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
| WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
| WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN
| WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR
| WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH;
//設(shè)置懸浮窗口透明
layoutParams.format = PixelFormat.TRANSLUCENT;
//設(shè)置懸浮窗口長(zhǎng)寬數(shù)據(jù)
layoutParams.width = 600;
layoutParams.height = 340;
//設(shè)置懸浮窗顯示位置
layoutParams.gravity = Gravity.START | Gravity.TOP;
layoutParams.x = 100;
layoutParams.y = 100;
return layoutParams;
}
-
窗口觸摸移動(dòng)事件，主要通過獲取觸摸位置，通過
WindowManager的updateViewLayout方法設(shè)置懸浮窗口的參數(shù)远豺，進(jìn)行窗口視圖位置更新：private class FloatViewMoveListener implements View.OnTouchListener { //開始觸控的坐標(biāo)，移動(dòng)時(shí)的坐標(biāo)（相對(duì)于屏幕左上角的坐標(biāo)） private int mTouchStartX; private int mTouchStartY; //開始時(shí)的坐標(biāo)和結(jié)束時(shí)的坐標(biāo)（相對(duì)于自身控件的坐標(biāo)） private int mStartX, mStartY; //判斷懸浮窗口是否移動(dòng)坞嘀，這里做個(gè)標(biāo)記躯护，防止移動(dòng)后松手觸發(fā)了點(diǎn)擊事件 private boolean isMove; @Override public boolean onTouch(View view, MotionEvent motionEvent) { int action = motionEvent.getAction(); int x = (int) motionEvent.getX(); int y = (int) motionEvent.getY(); switch (action) { case MotionEvent.ACTION_DOWN: isMove = false; mTouchStartX = (int) motionEvent.getRawX(); mTouchStartY = (int) motionEvent.getRawY(); mStartX = x; mStartY = y; break; case MotionEvent.ACTION_MOVE: int mTouchCurrentX = (int) motionEvent.getRawX(); int mTouchCurrentY = (int) motionEvent.getRawY(); mFloatParams.x += mTouchCurrentX - mTouchStartX; mFloatParams.y += mTouchCurrentY - mTouchStartY; mWindowManager.updateViewLayout(mShowView, mFloatParams); mTouchStartX = mTouchCurrentX; mTouchStartY = mTouchCurrentY; float deltaX = x - mStartX; float deltaY = y - mStartY; if (Math.abs(deltaX) >= 5 || Math.abs(deltaY) >= 5) { isMove = true; } break; case MotionEvent.ACTION_UP: break; default: break; } //如果是移動(dòng)事件不觸發(fā)OnClick事件，防止移動(dòng)的時(shí)候一放手形成點(diǎn)擊事件 return isMove; } } -
關(guān)閉懸浮窗丽涩，調(diào)用
WindowManager的removeView方法即可：public void dismiss() { if (mWindowManager != null && mShowView != null) { mWindowManager.removeView(mShowView); } } -
懸浮窗點(diǎn)擊返回前臺(tái)方法：
public void setTopApp(Context context) { //獲取ActivityManager ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); //獲得當(dāng)前運(yùn)行的task(任務(wù)) List<ActivityManager.RunningTaskInfo> taskInfoList = null; if (activityManager != null) { taskInfoList = activityManager.getRunningTasks(100); } if (taskInfoList != null) { for (ActivityManager.RunningTaskInfo taskInfo : taskInfoList) { //找到本應(yīng)用的 task棺滞，并將它切換到前臺(tái) if (taskInfo.topActivity != null && taskInfo.topActivity.getPackageName().equals(context.getPackageName())) { activityManager.moveTaskToFront(taskInfo.id, 0); break; } } } }
關(guān)于懸浮窗的一些基本操作到這里就基本結(jié)束了，具體的布局內(nèi)容及操作矢渊，歡迎查看具體的源碼實(shí)現(xiàn)：Github開發(fā)記錄
歡迎點(diǎn)擊查閱及Star继准，我也會(huì)繼續(xù)補(bǔ)充其它有用的知識(shí)及例子在項(xiàng)目上。
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