android:BroadcastReceiver 廣播接收者

Android 四大組件之一 

廣播的註冊方式有兩種:

一種是動態註冊 Context.registerReceiver() ，即在java代碼中註冊.

一種是靜態註冊，即在 AndroidManifest.xml 中使用<receiver>標籤註冊。

一、動態註冊：

private static String ACTION_TEST = "com.hsj.broad.test";

private static String ACTION_DATA = "com.hsj.broad.data"; 

 

IntentFilter filter = new IntentFilter();

filter.addAction(ACTION_TEST);

filter.addAction(ACTION_DATA);

registerReceiver(receiver, filter);  

二、靜態註冊：

<receiver android:name="com.hsj.receiver.XmlBroadcastReceiver" >

   <intent-filter>

      <action android:name="com.hsj.broad.xml" />

   </intent-filter>

</receiver> 

三、測試代碼：

package com.hsj.broadcast.activity;

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.Toast;

import com.hsj.broadcast.R;

/**
 * 廣播例子
 */
public class MainActivity extends Activity implements OnClickListener {
	private static String TAG = MainActivity.class.getSimpleName();

	private static String ACTION_TEST = "com.hsj.broad.test";
	private static String ACTION_DATA = "com.hsj.broda.data";

	private Button btnRegister;
	private Button btnSendBroad;
	private Button btnSendData;
	private Button btnUnRegister;
	private Button btnSendXml;

	private TestBroadcastReceiver receiver;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		initView();
		initData();
	}

	private void initView() {
		btnRegister = (Button) findViewById(R.id.btn_register);
		btnSendBroad = (Button) findViewById(R.id.btn_sendBroad);
		btnSendData = (Button) findViewById(R.id.btn_sendData);
		btnUnRegister = (Button) findViewById(R.id.btn_unregister);
		btnSendXml = (Button) findViewById(R.id.btn_sendXml);

		btnRegister.setOnClickListener(this);
		btnSendBroad.setOnClickListener(this);
		btnSendData.setOnClickListener(this);
		btnUnRegister.setOnClickListener(this);
		btnSendXml.setOnClickListener(this);
	}

	private void initData() {
		receiver = new TestBroadcastReceiver();
	}

	/** 註冊廣播 */
	private void registerAction() {
		IntentFilter filter = new IntentFilter();
		filter.addAction(ACTION_TEST);
		filter.addAction(ACTION_DATA);
		registerReceiver(receiver, filter);
		Toast.makeText(MainActivity.this, "註冊廣播成功", Toast.LENGTH_SHORT).show();
	}

	/** 註銷廣播 */
	private void unRegisterBroad() {
		unregisterReceiver(receiver);
		Toast.makeText(MainActivity.this, "註銷廣播成功", Toast.LENGTH_SHORT).show();
	}

	/** 發送廣播 */
	private void sendBroadCast() {
		Intent intent = new Intent();
		intent.setAction(ACTION_TEST);
		sendBroadcast(intent);
	}

	/** 發送帶數據的廣播 */
	private void sendBroadData() {
		Intent intent = new Intent();
		intent.setAction(ACTION_DATA);
		intent.putExtra("data", "我是發廣播送的");
		sendBroadcast(intent);
	}

	/** 發送xml註冊的廣播 */
	private void sendBroadXml() {
		Intent intent = new Intent();
		intent.setAction("com.hsj.broad.xml");
		sendBroadcast(intent);
	}

	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.btn_register:
			registerAction();
			break;
		case R.id.btn_sendBroad:
			sendBroadCast();
			break;
		case R.id.btn_sendData:
			sendBroadData();
			break;
		case R.id.btn_unregister:
			unRegisterBroad();
			break;
		case R.id.btn_sendXml:
			sendBroadXml();
			break;
		default:
			break;
		}
	}

	/**
	 * 測試的廣播接收者
	 */
	class TestBroadcastReceiver extends BroadcastReceiver {
		@Override
		public void onReceive(Context context, Intent intent) {
			if (ACTION_TEST.equals(intent.getAction())) {
				Toast.makeText(MainActivity.this, "哈哈，我收到了...",
						Toast.LENGTH_SHORT).show();
			}
			if (ACTION_DATA.equals(intent.getAction())) {
				String data = intent.getStringExtra("data");
				Toast.makeText(MainActivity.this, data, Toast.LENGTH_SHORT)
						.show();
			}
		}
	}

	@Override
	protected void onDestroy() {
		super.onDestroy();

<span style="white-space:pre">		</span>//註銷廣播
		unregisterReceiver(receiver);
	}

}