android添加桌面悬浮窗

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>

@SuppressLint("ViewConstructor")

public class OEdOverLayView extends FrameLayout {

    public static OEdOverLayView create(Context context) {

        return new OEdOverLayView(context);

    }

    public static WindowManager.LayoutParams createLayoutParams() {

        final WindowManager.LayoutParams params =

                new WindowManager.LayoutParams(WRAP_CONTENT, WRAP_CONTENT, TYPE_TOAST, FLAG_NOT_FOCUSABLE

                        | FLAG_NOT_TOUCH_MODAL

                        | FLAG_LAYOUT_NO_LIMITS

                        | FLAG_LAYOUT_INSET_DECOR

                        | FLAG_LAYOUT_IN_SCREEN, TRANSLUCENT);

        params.gravity = Gravity.TOP | Gravity.LEFT;

        return params;

    }

    private OEdOverLayView(@NonNull Context context) {

        super(context);

        inflate(context, R.layout.widget_oed_overlay, this);

        init();

    }

 private void addOverLayView() {

        if (oEdOverLayView == null) {

            oEdOverLayView = OEdOverLayView.create(getApplicationContext());

            WindowManager windowManager = (WindowManager) getApplicationContext().getSystemService(WINDOW_SERVICE);

            windowManager.addView(oEdOverLayView, OEdOverLayView.createLayoutParams());

            oEdOverLayView.getRootLayout().setOnTouchListener(new OEdOverLayMoveListener(windowManager, oEdOverLayView));

        }

    }

public class OEdOverLayMoveListener implements View.OnTouchListener {

    private final WindowManager windowManager;

    private final View view;

    private WindowManager.LayoutParams params;

    private int initialX;

    private int initialY;

    private float initialTouchX;

    private float initialTouchY;

    public OEdOverLayMoveListener(WindowManager windowManager, View view) {

        this.windowManager = windowManager;

        this.view = view;

        this.params = (WindowManager.LayoutParams) view.getLayoutParams();

    }

    @Override

    public boolean onTouch(View v, MotionEvent event) {

        switch (event.getAction()) {

            case MotionEvent.ACTION_DOWN:

                //remember the initial position.

                initialX = params.x;

                initialY = params.y;

                //get the touch location

                initialTouchX = event.getRawX();

                initialTouchY = event.getRawY();

                return true;

            case MotionEvent.ACTION_MOVE:

                //Calculate the X and Y coordinates of the view.

                params.x = initialX + (int) (event.getRawX() - initialTouchX);

                params.y = initialY + (int) (event.getRawY() - initialTouchY);

                //Update the layout with new X & Y coordinate

                windowManager.updateViewLayout(view, params);

                return true;

        }

        return true;

    }

}

// return ture 会消费掉touch事件，导致onclick无法获取事件

    public static WindowManager.LayoutParams createLayoutParams() {

        final WindowManager.LayoutParams params =

                new WindowManager.LayoutParams(WRAP_CONTENT, WRAP_CONTENT, TYPE_TOAST, FLAG_NOT_FOCUSABLE

                        | FLAG_NOT_TOUCH_MODAL

                        | FLAG_LAYOUT_NO_LIMITS

                        | FLAG_LAYOUT_INSET_DECOR

                        | FLAG_LAYOUT_IN_SCREEN, TRANSLUCENT);

        params.gravity = Gravity.TOP | Gravity.LEFT;

        return params;

    }