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