案例代码:

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:id="@+id/relativeLayout"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:background="@drawable/bg"

    tools:context=".MainActivity">

</RelativeLayout>

AndroidView.java

package com.example.demo4;

import android.content.Context;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.graphics.Canvas;

import android.graphics.Paint;

import android.view.View;

/**

 * 创建自定义View，用来绘制安卓的logo

 */

public class AndroidView extends View {

    public float bitmapX;

    public float bitmapY;

    public AndroidView(Context context) {

        super(context);

        bitmapX = 65;

        bitmapY = 0;

    }

    @Override

    protected void onDraw(Canvas canvas) {

        super.onDraw(canvas);

        Paint paint = new Paint();

        Bitmap bitmap = BitmapFactory.decodeResource(

                this.getResources(),R.mipmap.ic_launcher);

        canvas.drawBitmap(bitmap,bitmapX,bitmapY,paint);

        if(bitmap.isRecycled()){

            bitmap.recycle();

        }

    }

}

MainActivity.java

package com.example.demo4;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import android.view.MotionEvent;

import android.view.View;

import android.widget.RelativeLayout;

public class MainActivity extends AppCompatActivity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        /**

         *第二步:创建并示例化帽子类的一个对象，并为AndroidLogo添加触摸

         * 事件监听器，在重写的触摸方法中根据触摸的位置重新绘制

         * Logo

         */

        final AndroidView androidView = new AndroidView(MainActivity.this);

        androidView.setOnTouchListener(new View.OnTouchListener(){

            @Override

            public boolean onTouch(View v, MotionEvent event) {

                androidView.bitmapX = event.getX() - 80;

                androidView.bitmapY = event.getY() - 80;

                androidView.invalidate();

                return true;

            }

        });

        //第三步:把Logo添加到布局管理器中

        RelativeLayout rl = (RelativeLayout)findViewById

                (R.id.relativeLayout);

        rl.addView(androidView);

    }

}