Android--启动广播（Broadcast）

标签：android   broadcast   broadcastreceiver   

1.定义广播组件，组件类型继承BroadcastReceiver类：

package org.lxh.demo;

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

public class MyBroadcastReceiverUtil extends BroadcastReceiver {
	
	public MyBroadcastReceiverUtil(){
	       System.out.println("***每次广播都会实例化一个新的广播组件进行操作！");
	}

	@Override
	public void onReceive(Context context, Intent intent) {//注意参数
		Toast.makeText(context, "广播已经启动", Toast.LENGTH_LONG).show();

	}

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/mybtn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="开始广播" />

</LinearLayout>

package org.lxh.demo;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnFocusChangeListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class Hello extends Activity {
	private Button mybtn = null;

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState); // 生命周期方法
		super.setContentView(R.layout.main); // 设置要使用的布局管理器
		this.mybtn = (Button) super.findViewById(R.id.mybtn);
		this.mybtn.setOnClickListener(new OnClickListenerImpl());

	}

	private class OnClickListenerImpl implements OnClickListener {

		public void onClick(View arg0) {
			Intent it = new Intent(Intent.ACTION_EDIT);
			Hello.this.sendBroadcast(it);
		}

	}
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="org.lxh.demo"
    android:versionCode="1"
    android:versionName="1.0" >


    <uses-sdk android:minSdkVersion="10" />


    <application
        android:icon="@drawable/icon"
        android:label="@string/app_name" >
        <activity
            android:name=".Hello"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />


                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>


        <strong><span style="color:#ff0000;"><receiver
            android:name="MyBroadcastReceiverUtil"
            android:enabled="true" >
            <intent-filter>
                <action android:name="android.intent.action.EDIT" />
            </intent-filter>
        </receiver></span></strong>
    </application>


</manifest>

Android--启动广播（Broadcast）

标签：android   broadcast   broadcastreceiver   

原文地址：http://blog.csdn.net/yayun0516/article/details/43149327