Android中BroadCast与Activity之间的通信

在看本文之前，假设你对于Android的广播机制不是非常了解。建议先行阅读我转载的一篇博文：图解
Android 广播机制。

因为本案例比較简单，故直接在此贴出代码，不做过多的阐述。

先上效果截图：

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MainActivity的代码例如以下：

package com.gc.testbroadcasedemo;

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.TextView;
/**
 *
 * @author Android将军
 *
 */
public class MainActivity extends Activity {
	private Button mButton;
	private TextView mTextView;
	public static String ACTION_INTENT_TEST = "com.gc.broadcase.test";

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		mTextView = (TextView) findViewById(R.id.message_tv);
		mButton = (Button) findViewById(R.id.send_btn);
		mButton.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				Intent mIntent = new Intent(ACTION_INTENT_TEST);
				sendBroadcast(mIntent);
			}
		});
		registerMessageReceiver();
	}
	//在销毁时要与广播解绑
	@Override
	protected void onDestroy() {
		unregisterReceiver(mMessageReceiver);
		super.onDestroy();
	}

	public MessageReceiver mMessageReceiver;
	public static String ACTION_INTENT_RECEIVER = "com.gc.broadcast.receiver";

	/**
	 * 动态注冊广播
	 */
	public void registerMessageReceiver() {
		mMessageReceiver = new MessageReceiver();
		IntentFilter filter = new IntentFilter();

		filter.addAction(ACTION_INTENT_RECEIVER);
		registerReceiver(mMessageReceiver, filter);
	}

	public class MessageReceiver extends BroadcastReceiver {

		@Override
		public void onReceive(Context context, Intent intent) {
			// TODO Auto-generated method stub
			if (intent.getAction().equals(ACTION_INTENT_RECEIVER)) {
				mTextView.setText(intent.getStringExtra("message"));
			}
		}

	}
}

MyBroadCast的代码例如以下：

package com.gc.testbroadcasedemo;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
/**
 *
 * @author Android将军
 *
 */
public class MyBroadCast extends BroadcastReceiver{

	public MyBroadCast()
	{
		Log.v("BROADCAST_TAG", "MyBroadCast");
	}
	@Override
	public void onReceive(Context context, Intent intent) {
		// TODO Auto-generated method stub
		Log.v("BROADCAST_TAG", "onReceive");
		Bundle bundle = intent.getExtras();
		if(intent.getAction().equals(MainActivity.ACTION_INTENT_TEST))
		{
			processCustomMessage(context, bundle);
		}
	}
	//send msg to MainActivity
		private void processCustomMessage(Context context, Bundle bundle) {

				Intent mIntent=new Intent(MainActivity.ACTION_INTENT_RECEIVER);
				mIntent.putExtra("message", "測试Broadcast与Activity之间的通信");
				context.sendBroadcast(mIntent);

		}

}

案例project文件夹例如以下：

在AndroidManifest中静态注冊MyBroadCast广播。代码例如以下：

 <receiver android:name=".MyBroadCast">
            <intent-filter >
                <action android:name="com.gc.broadcase.test"/>
            </intent-filter>
        </receiver>

转载请注明出处：http://blog.csdn.net/android_jiangjun/article/details/39928243