android廣播的使用

在Activity中，註冊廣播的一個Demo。

總共分3步

第一步：定義一個BroadcastReceiver廣播接收類：

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private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver(){ 
        @Override 
        public void onReceive(Context context, Intent intent) { 
            String action = intent.getAction(); 
            if(action.equals(ACTION_NAME)){ 
                Toast.makeText(Test.this, "處理action名字相對應的廣播", 200); 
            } 
        } 
         
    }; 

 

第二步：註冊該廣播：

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public void registerBoradcastReceiver(){ 
        IntentFilter myIntentFilter = new IntentFilter(); 
        myIntentFilter.addAction(ACTION_NAME); 
        //註冊廣播       
        registerReceiver(mBroadcastReceiver, myIntentFilter); 
    } 

 

第三步：觸發響應

 

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mBtnMsgEvent = new Button(this); 
        mBtnMsgEvent.setText("發送廣播"); 
        mBtnMsgEvent.setOnClickListener(new OnClickListener() { 
            @Override 
            public void onClick(View v) { 
                Intent mIntent = new Intent(ACTION_NAME); 
                mIntent.putExtra("yaner", "發送廣播，相當於在這裡傳送資料"); 
                 
                //發送廣播 
                sendBroadcast(mIntent); 
            } 
        }); 
     

 

 

-----最後附上完整代碼：

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package my.yaner; 
 
import android.app.Activity; 
import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.Intent; 
import android.content.IntentFilter; 
import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.LinearLayout; 
import android.widget.Toast; 
 
public class Test extends Activity{ 
    private final String ACTION_NAME = "發送廣播"; 
    private Button mBtnMsgEvent = null; 
     
    protected void onCreate(Bundle savedInstanceState){ 
        super.onCreate(savedInstanceState); 
         
        //註冊廣播 
        registerBoradcastReceiver(); 
         
        LinearLayout mLinearLayout = new LinearLayout(this); 
        mBtnMsgEvent = new Button(this); 
        mBtnMsgEvent.setText("發送廣播"); 
        mLinearLayout.addView(mBtnMsgEvent); 
        setContentView(mLinearLayout); 
         
        mBtnMsgEvent.setOnClickListener(new OnClickListener() { 
            @Override 
            public void onClick(View v) { 
                Intent mIntent = new Intent(ACTION_NAME); 
                mIntent.putExtra("yaner", "發送廣播，相當於在這裡傳送資料"); 
                 
                //發送廣播 
                sendBroadcast(mIntent); 
            } 
        }); 
    } 
     
    private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver(){ 
        @Override 
        public void onReceive(Context context, Intent intent) { 
            String action = intent.getAction(); 
            if(action.equals(ACTION_NAME)){ 
                Toast.makeText(Test.this, "處理action名字相對應的廣播", 200); 
            } 
        } 
         
    }; 
     
    public void registerBoradcastReceiver(){ 
        IntentFilter myIntentFilter = new IntentFilter(); 
        myIntentFilter.addAction(ACTION_NAME); 
        //註冊廣播       
        registerReceiver(mBroadcastReceiver, myIntentFilter); 
    } 
} 

作者“xyylchq的專欄”