广播机制BroadcastReceiver（一、xml注册方式）

AndroidManifest.xml 中添加

  <receiver android:name=".TestReceiver">
   <intent-filter>
    <action android:name="android.intent.action.PICK" />
   </intent-filter>
  </receiver>

TestActivity.java

package mars.testbc;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class TestActivity extends Activity {
    /** Called when the activity is first created. */
 private Button sendButton;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.testreceiver);
        sendButton = (Button)findViewById(R.id.sendButton);
        sendButton.setOnClickListener(new BroadcastListener());
    }
    class BroadcastListener implements OnClickListener{

  @Override
  public void onClick(View v) {
   Intent intent = new Intent();
   intent.setAction(Intent.ACTION_EDIT);
   TestActivity.this.sendBroadcast(intent);
  
  }
     
    }
}

TestReceiver.java

package mars.testbc;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class TestReceiver extends BroadcastReceiver{

 public TestReceiver(){
  System.out.println("TestReceiver");
 }
 @Override
 public void onReceive(Context context, Intent intent) {
  System.out.println("onReceive");
 }
}