<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:dfv="http://schemas.android.com/apk/res-auto"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:gravity="center"
  android:orientation="vertical">

  <RelativeLayout
    android:id="@+id/monk_relative_root"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <ImageView
      android:id="@+id/float_id"
      android:layout_width="70dp"
      android:layout_height="80dp"
      android:layout_gravity="center_vertical|end"
      android:scaleType="center"
      android:src="@drawable/little_monk" />

  </RelativeLayout>

  <FrameLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <floatwindow.xishuang.float_lib.view.DraggableFlagView
      android:id="@+id/main_dfv"
      android:layout_width="17dp"
      android:layout_height="17dp"
      android:layout_gravity="end"
      dfv:color1="#FF3B30" />
  </FrameLayout>
</FrameLayout>

@Override
  public boolean onTouchEvent(MotionEvent event) {
    // 獲取相對(duì)屏幕的坐標(biāo)，即以屏幕左上角為原點(diǎn)
    int x = (int) event.getRawX();
    int y = (int) event.getRawY();
    //下面的這些事件，跟圖標(biāo)的移動(dòng)無(wú)關(guān)，為了區(qū)分開拖動(dòng)和點(diǎn)擊事件
    int action = event.getAction();
    switch (action) {
      case MotionEvent.ACTION_DOWN:
        startTime = System.currentTimeMillis();
        mTouchStartX = event.getX();
        mTouchStartY = event.getY();
        break;
      case MotionEvent.ACTION_MOVE:
        //圖標(biāo)移動(dòng)的邏輯在這里
        float mMoveStartX = event.getX();
        float mMoveStartY = event.getY();
        // 如果移動(dòng)量大于3才移動(dòng)
        if (Math.abs(mTouchStartX - mMoveStartX) > 3
            && Math.abs(mTouchStartY - mMoveStartY) > 3) {
          // 更新浮動(dòng)窗口位置參數(shù)
          mWmParams.x = (int) (x - mTouchStartX);
          mWmParams.y = (int) (y - mTouchStartY);
          mWindowManager.updateViewLayout(this, mWmParams);
          return false;
        }
        break;
      case MotionEvent.ACTION_UP:
        endTime = System.currentTimeMillis();
        //當(dāng)從點(diǎn)擊到彈起小于半秒的時(shí)候,則判斷為點(diǎn)擊,如果超過(guò)則不響應(yīng)點(diǎn)擊事件
        if ((endTime - startTime) > 0.1 * 1000L) {
          isclick = false;
        } else {
          isclick = true;
        }
        break;
    }
    //響應(yīng)點(diǎn)擊事件
    if (isclick) {
      Toast.makeText(mContext, "我是大傻叼", Toast.LENGTH_SHORT).show();
    }
    return true;
  }

// 如果移動(dòng)量大于3才移動(dòng)
if (Math.abs(mTouchStartX - mMoveStartX) > 3 && Math.abs(mTouchStartY - mMoveStartY) > 3) 

/**
 * 懸浮窗在服務(wù)中創(chuàng)建，通過(guò)暴露接口FloatCallBack與Activity進(jìn)行交互
 */
public class FloatMonkService extends Service implements FloatCallBack {
  /**
   * home鍵監(jiān)聽
   */
  private HomeWatcherReceiver mHomeKeyReceiver;

  @Override
  public void onCreate() {
    super.onCreate();
    FloatActionController.getInstance().registerCallLittleMonk(this);
    //注冊(cè)廣播接收者
    mHomeKeyReceiver = new HomeWatcherReceiver();
    final IntentFilter homeFilter = new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
    registerReceiver(mHomeKeyReceiver, homeFilter);
    //初始化懸浮窗UI
    initWindowData();
  }

  @Override
  public IBinder onBind(Intent intent) {
    return null;
  }

  /**
   * 初始化WindowManager
   */
  private void initWindowData() {
    FloatWindowManager.createFloatWindow(this);
  }

  @Override
  public void onDestroy() {
    super.onDestroy();
    //移除懸浮窗
    FloatWindowManager.removeFloatWindowManager();
    //注銷廣播接收者
    if (null != mHomeKeyReceiver) {
      unregisterReceiver(mHomeKeyReceiver);
    }
  }

  /////////////////////////////////////////////////////////實(shí)現(xiàn)接口////////////////////////////////////////////////////
  @Override
  public void guideUser(int type) {
    FloatWindowManager.updataRedAndDialog(this);
  }


  /**
   * 懸浮窗的隱藏
   */
  @Override
  public void hide() {
    FloatWindowManager.hide();
  }

  /**
   * 懸浮窗的顯示
   */
  @Override
  public void show() {
    FloatWindowManager.show();
  }

  /**
   * 添加可領(lǐng)取的數(shù)量
   */
  @Override
  public void addObtainNumer() {
    FloatWindowManager.addObtainNumer(this);
    guideUser(4);
  }

  /**
   * 減少可領(lǐng)取的數(shù)量
   */
  @Override
  public void setObtainNumber(int number) {
    FloatWindowManager.setObtainNumber(this, number);
  }
}

/**
   * 創(chuàng)建一個(gè)小懸浮窗。初始位置為屏幕的右下角位置。
   */
  public static void createFloatWindow(Context context) {
    wmParams = new WindowManager.LayoutParams();
    WindowManager windowManager = getWindowManager(context);
    mFloatLayout = new FloatLayout(context);
    if (Build.VERSION.SDK_INT >= 24) { /*android7.0不能用TYPE_TOAST*/
      wmParams.type = WindowManager.LayoutParams.TYPE_PHONE;
    } else { /*以下代碼塊使得android6.0之后的用戶不必再去手動(dòng)開啟懸浮窗權(quán)限*/
      String packname = context.getPackageName();
      PackageManager pm = context.getPackageManager();
      boolean permission = (PackageManager.PERMISSION_GRANTED == pm.checkPermission("android.permission.SYSTEM_ALERT_WINDOW", packname));
      if (permission) {
        wmParams.type = WindowManager.LayoutParams.TYPE_PHONE;
      } else {
        wmParams.type = WindowManager.LayoutParams.TYPE_TOAST;
      }
    }

    //設(shè)置圖片格式，效果為背景透明
    wmParams.format = PixelFormat.RGBA_8888;
    //設(shè)置浮動(dòng)窗口不可聚焦（實(shí)現(xiàn)操作除浮動(dòng)窗口外的其他可見窗口的操作）
    wmParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
    //調(diào)整懸浮窗顯示的停靠位置為左側(cè)置頂
    wmParams.gravity = Gravity.START | Gravity.TOP;

    DisplayMetrics dm = new DisplayMetrics();
    //取得窗口屬性
    mWindowManager.getDefaultDisplay().getMetrics(dm);
    //窗口的寬度
    int screenWidth = dm.widthPixels;
    //窗口高度
    int screenHeight = dm.heightPixels;
    //以屏幕左上角為原點(diǎn)，設(shè)置x、y初始值，相對(duì)于gravity
    wmParams.x = screenWidth;
    wmParams.y = screenHeight;

    //設(shè)置懸浮窗口長(zhǎng)寬數(shù)據(jù)
    wmParams.width = WindowManager.LayoutParams.WRAP_CONTENT;
    wmParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
    mFloatLayout.setParams(wmParams);
    windowManager.addView(mFloatLayout, wmParams);
    mHasShown = true;
    //是否展示小紅點(diǎn)展示
    checkRedDot(context);
  }

/**
   * 返回當(dāng)前已創(chuàng)建的WindowManager。
   */
  private static WindowManager getWindowManager(Context context) {
    if (mWindowManager == null) {
      mWindowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
    }
    return mWindowManager;
  }

 if (Build.VERSION.SDK_INT >= 24) { /*android7.0不能用TYPE_TOAST*/
      wmParams.type = WindowManager.LayoutParams.TYPE_PHONE;
    } else { /*以下代碼塊使得android6.0之后的用戶不必再去手動(dòng)開啟懸浮窗權(quán)限*/
      String packname = context.getPackageName();
      PackageManager pm = context.getPackageManager();
      boolean permission = (PackageManager.PERMISSION_GRANTED == pm.checkPermission("android.permission.SYSTEM_ALERT_WINDOW", packname));
      if (permission) {
        wmParams.type = WindowManager.LayoutParams.TYPE_PHONE;
      } else {
        wmParams.type = WindowManager.LayoutParams.TYPE_TOAST;
      }
    }

/**
 * Author:xishuang
 * Date:2017.08.01
 * Des:與懸浮窗交互的控制類，真正的實(shí)現(xiàn)邏輯不在這
 */
public class FloatActionController {

  private FloatActionController() {
  }

  public static FloatActionController getInstance() {
    return LittleMonkProviderHolder.sInstance;
  }

  // 靜態(tài)內(nèi)部類
  private static class LittleMonkProviderHolder {
    private static final FloatActionController sInstance = new FloatActionController();
  }

  private FloatCallBack mCallLittleMonk;

  /**
   * 開啟服務(wù)懸浮窗
   */
  public void startMonkServer(Context context) {
    Intent intent = new Intent(context, FloatMonkService.class);
    context.startService(intent);
  }

  /**
   * 關(guān)閉懸浮窗
   */
  public void stopMonkServer(Context context) {
    Intent intent = new Intent(context, FloatMonkService.class);
    context.stopService(intent);
  }

  /**
   * 注冊(cè)監(jiān)聽
   */
  public void registerCallLittleMonk(FloatCallBack callLittleMonk) {
    mCallLittleMonk = callLittleMonk;
  }

  /**
   * 懸浮窗的顯示
   */
  public void show() {
    if (mCallLittleMonk == null) return;
    mCallLittleMonk.show();
  }

  /**
   * 懸浮窗的隱藏
   */
  public void hide() {
    if (mCallLittleMonk == null) return;
    mCallLittleMonk.hide();
  }
}