安卓app_sl3.4兔子跟随点击屏幕坐标移动

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:id="@+id/mylayout"
    
    tools:context="com.example.sl3_4.MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

</FrameLayout>

　　

MainActivity.java

package com.example.sl3_4;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.FrameLayout;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        FrameLayout frameLayout=(FrameLayout)findViewById(R.id.mylayout);
        final RabbitView rabbit=new RabbitView(MainActivity.this);
        //为小兔子添加触发事件监听器
        rabbit.setOnTouchListener(new OnTouchListener(){

            @Override
            public boolean onTouch(View v, MotionEvent event) {
                // TODO 自动生成的方法存根
                rabbit.bitmapX=event.getX();
                rabbit.bitmapY=event.getY();
                rabbit.invalidate();//重绘rabbit组件
                return false;
            }
            
        });
        frameLayout.addView(rabbit);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

RabbitView.java类

package com.example.sl3_4;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.view.View;

public class RabbitView extends View {
    public float bitmapX;
    public float bitmapY;
    public RabbitView(Context context)
    {
        super(context);
        bitmapX=750;
        bitmapY=500;
    }
    @Override
    protected void onDraw(Canvas canvas)
    {
        super.onDraw(canvas);
        Paint paint=new Paint();
        Bitmap bitmap= BitmapFactory.decodeResource(this.getResources(),R.drawable.rabbit);
        canvas.drawBitmap(bitmap,bitmapX,bitmapY, paint);
        if(bitmap.isRecycled()) //强制回收图片
        {
            bitmap.recycle();
        }
        
    }

}

 小兔子图片