[Android]在Manifest中登记广播监听器

[Android]在Manifest中注册广播监听器

在Manifest中注册广播接收器以及接受广播的类型，并通过Activity中的按钮发出广播，通过接收器接受并响应。

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<manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.xmlbroadcast"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="10"        android:targetSdkVersion="15" />    <application        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name=".MainActivity"            android:label="@string/title_activity_main" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <!--  注册广播监听器   -->        <receiver android:name="TestReceiver">            <intent-filter>                <!-- 注明接受广播的类型   -->                <action android:name="android.intent.action.EDIT"/>            </intent-filter>        </receiver>    </application></manifest>

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TestReceiver类，用来注明接受响应后执行的操作。

package com.example.xmlbroadcast;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.widget.Toast;public class TestReceiver extends BroadcastReceiver{@Overridepublic void onReceive(Context arg0, Intent arg1) {// TODO Auto-generated method stub//Toast to1=null;//to1.makeText(null,"fuck", Toast.LENGTH_SHORT);//to1.show();System.out.print("ReceiveMessage");//TextView tx1=null;//tx1=(TextView)findViewById(R.id.txv);}}

通过Activity中的按钮发出一个广播

package com.example.xmlbroadcast;import java.io.*;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;public class MainActivity extends Activity {private TextView tx1=null;private Button bt1=null;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        bt1=(Button)findViewById(R.id.btn);        bt1.setOnClickListener(new bt1listener());        tx1=(TextView)findViewById(R.id.txv);    }    class bt1listener implements OnClickListener{public void onClick(View v) {// TODO Auto-generated method stubSystem.out.print("fuck");tx1.setText("fuck");Intent it1=new Intent();it1.setAction(Intent.ACTION_EDIT);MainActivity.this.sendBroadcast(it1);}        }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        getMenuInflater().inflate(R.menu.activity_main, menu);        return true;    }}

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