Android屏幕上的浮动视图

我试图制作一个浮动视图,用户可以在屏幕上拖动.

我们的想法是启动一项服务,然后在屏幕上膨胀视图.

但是有一个问题,而不是将事件属于自己,它需要所有用户输入事件.

这是我的代码:manifest.xml:

浮动视图可以拖动:

package com.example.floatandroidpractice;

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.view.MotionEvent;
import android.view.View;

public class littleIconView extends View {
    private float viewX;
    private float viewY;
    private Paint mPaint;
    private Bitmap androidIcon;

    public littleIconView(Context context) {
        super(context);
        mPaint = new Paint();
        mPaint.setColor(Color.BLACK);
        androidIcon = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);

    }

    @Override
    public void onDraw(Canvas cvs) {
        cvs.drawBitmap(androidIcon, viewX - androidIcon.getWidth() / 2, viewY - androidIcon.getHeight()
                / 2, mPaint);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        boolean touchedX = Math.abs(viewX - event.getX()) > androidIcon.getWidth();
        boolean touchedY = Math.abs(viewY - event.getY()) > androidIcon.getHeight();
        boolean isValidTouch = !touchedX && !touchedY;
        if (isValidTouch) {
            if (event.getAction() == MotionEvent.ACTION_DOWN || event.getAction() == MotionEvent.ACTION_MOVE
                    || event.getAction() == MotionEvent.ACTION_UP) {
                viewX = event.getX();
                viewY = event.getY();
            }
            invalidate();
            return true;

        }
        else
            return false;
    }
}

和服务:

package com.example.floatandroidpractice;
import android.app.Service;
import android.content.Intent;
import android.graphics.PixelFormat;
import android.os.IBinder;
import android.view.WindowManager;
import android.view.WindowManager.LayoutParams;

public class WalkingIconService extends Service {

    @Override
    public void onCreate() {
        super.onCreate();

    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        littleIconView a = new littleIconView(getApplicationContext());
        LayoutParams mLayoutParams = new WindowManager.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 0, 0, PixelFormat.TRANSPARENT);
        WindowManager mWindowManager = (WindowManager) this.getSystemService(WINDOW_SERVICE);
        mLayoutParams.flags = LayoutParams.FLAG_NOT_TOUCH_MODAL | LayoutParams.FLAG_NOT_FOCUSABLE
                | LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH |
                LayoutParams.FLAG_LAYOUT_INSET_DECOR | LayoutParams.FLAG_LAYOUT_IN_SCREEN;
        mWindowManager.addView(a, mLayoutParams);
        return super.onStartCommand(intent, flags, startId);
    }

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

}

完整项目:https://github.com/shanwu/shanwu_coding_base/tree/xxx/floatAndroidPractice