Android Handler之Message傳遞參數

最近發現Message，發送消息能夠傳遞參數，這個思路很好，因此寫了一個例子，點擊屏幕，給Activity發送一個消息，傳遞兩個參數，並把這個activity銷燬掉！

程序打開界面：

點擊屏幕，銷燬activity彈出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 = 1;  
          
        public Handler mHandler=new Handler(){  
            public void handleMessage(Message msg) {  
            switch(msg.what){  
                case CANSHU :   String str1 = msg.getData().getString("text1");//接受msg傳遞過來的參數   
                        String str2 = msg.getData().getString("text2");//接受msg傳遞過來的參數   
                        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, 0, 0, null);  
              
        }  
      
        @Override  
        public boolean onTouchEvent(MotionEvent event) {  
            int x = (int) event.getX();  
            int y = (int) event.getY();  
            Rect rect;  
            rect = new Rect(0,0,320,480);  
              
            if(rect.contains(x,y))  
            {  
                Message msg = new Message();  
                msg.what = MainActivity.CANSHU;  
                Bundle bundle = new Bundle();    
                          bundle.putString("text1","大明的消息傳遞參數的例子！");  //往Bundle中存放數據   
                             bundle.putString("text2","Time：2011-09-05");  //往Bundle中put數據   
                             msg.setData(bundle);//mes利用Bundle傳遞數據   
                             activity.mHandler.sendMessage(msg);//用activity中的handler發送消息   
            }  
              
            return super.onTouchEvent(event);  
        }  
          
          
    }