Android Handler之Message传递参数

最近发现Message，发送消息可以传递参数，这个思路很好，所以写了一个例子，点击屏幕，给Activity发送一个消息，传递两个参数，并把这个activity销毁掉！

程序打开界面：

点击屏幕，销毁activity弹出Toast：

MainActivity：

    package com.cn.Android;  

    import android.app.Activity;
    import android.os.Bundle;
    import android.os.Handler;
    import android.os.Message;
    import android.widget.Toast;  

    public class MainActivity extends Activity {  

        final static int CANSHU = ;  

        public Handler mHandler=new Handler(){
            public void handleMessage(Message msg) {
            switch(msg.what){
                case CANSHU :   String str1 = msg.getData().getString("text1");//接受msg传递过来的参数
                        String str2 = msg.getData().getString("text2");//接受msg传递过来的参数
                        initFinishMainActivity(str1, str2);
                        break;
                　　　　default: break;
                }
            }
        };  

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            InitMainActivity();
        }  

        public void InitMainActivity()
        {
            setContentView(new MainActivityView(this,this));
        }  

        public void initFinishMainActivity(String str1, String str2)
        {
            Toast.makeText(MainActivity.this, str1+str2, Toast.LENGTH_LONG).show();
            finish();
        }
    }  

MainActivityView：

    package com.cn.android;  

    import android.content.Context;
    import android.graphics.Bitmap;
    import android.graphics.BitmapFactory;
    import android.graphics.Canvas;
    import android.graphics.Rect;
    import android.os.Bundle;
    import android.os.Message;
    import android.view.MotionEvent;
    import android.view.View;  

    public class MainActivityView extends View{  

        private MainActivity activity;
        private Context context;
        private Bitmap m_Bitmap;  

        public MainActivityView(Context context, MainActivity activity) {
            super(context);
            this.activity = activity;
            this.context = context;
            initBitmap();
        }  

        public void initBitmap()
        {
            m_Bitmap = BitmapFactory.decodeResource(this.getResources(),R.drawable.bg);
        }  

        @Override
        public void onDraw(Canvas canvas) {
            canvas.drawBitmap(m_Bitmap, , , null);  

        }  

        @Override
        public boolean onTouchEvent(MotionEvent event) {
            int x = (int) event.getX();
            int y = (int) event.getY();
            Rect rect;
            rect = new Rect(,,,);  

            if(rect.contains(x,y))
            {
                Message msg = new Message();
                msg.what = MainActivity.CANSHU;
                Bundle bundle = new Bundle();
                          bundle.putString("text1","大明的消息传递参数的例子！");  //往Bundle中存放数据
                             bundle.putString("text2","Time：2011-09-05");  //往Bundle中put数据
                             msg.setData(bundle);//mes利用Bundle传递数据
                             activity.mHandler.sendMessage(msg);//用activity中的handler发送消息
            }  

            return super.onTouchEvent(event);
        }  

    }