Android 类中类广播的静态注册方法

静态注册和动态注册其中的一个区别是 : 动态注册需要所在的activity或者service被创建后才能够被注册,静态注册不需要activity和service启动就可以注册,并且即使activity和service没有启动,也可以接受广播,但是动态却不行.

该文解决的问题点是,在一个没有启动的activity或者service中存在一个继承BroadcastReceiver内中内类,这个类将如何静态注册.

给出一个demo:

启动的第一个activity类:

package com.example.androidbroadcastdemo;

import android.os.Bundle;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.util.Log;
import android.view.Menu;
import android.widget.Toast;

public class MainActivity extends Activity {

    private final String TAG="mainactivity";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        IntentFilter ii=new IntentFilter();
        ii.addAction("com.tf.ACTION");
//        MainActivity.this.registerReceiver(mb, ii);
        MainActivity.this.registerReceiver(mb, new IntentFilter("com.tf.ACTION"));
        
        IntentFilter ih=new IntentFilter();
        ih.addAction("com.tf.ACTIONS");
        MainActivity.this.registerReceiver(mbn, new IntentFilter("com.tf.ACTIONS"));
        Intent i=new Intent(this,receiverget.class);
        this.startActivity(i);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        
        return true;
    }
    
    public BroadcastReceiver mb=new BroadcastReceiver(){

        @Override
        public void onReceive(Context context, Intent intent) {
            // TODO Auto-generated method stub
//            Toast.makeText(getApplicationContext(), "get broadcast msg : "+intent.getAction()+"///"+intent.getStringExtra("msg"), Toast.LENGTH_LONG).show();
            Log.i(TAG,"get information .");
        }
        
    };
    public BroadcastReceiver mbn=new BroadcastReceiver(){

        @Override
        public void onReceive(Context context, Intent intent) {
            // TODO Auto-generated method stub
            Toast.makeText(getApplicationContext(), "get broadcast msg : "+intent.getAction()+"///"+intent.getStringExtra("msg"), Toast.LENGTH_LONG).show();
            Log.i(TAG,"get information .");
        }
        
    };

}

下面是另外两个activity,也可以自行改为service,只是在启动的时候把startActivity方法改为startService方法就可以了.

package com.example.androidbroadcastdemo;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.AttributeSet;
import android.view.View;

public class receiverget extends Activity{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        Intent i=new Intent();
        i.putExtra("msg", "yes");
        i.setAction("com.tf.ACTION");
        this.sendBroadcast(i);
        
        Intent in=new Intent();
        in.putExtra("msg", "no");
        in.setAction("com.tf.ACTIONS");
        this.sendBroadcast(in);
    }

    @Override
    public View onCreateView(String name, Context context, AttributeSet attrs) {
        // TODO Auto-generated method stub
        return super.onCreateView(name, context, attrs);
    }

}

第三个:内部类用静态的static声明,并且类中不能够使用非静态或者主类中的变量,可能是由于主类没有创建,而这时收到广播,就会报出变量未声明之类的错误.

package com.example.androidbroadcastdemo;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.widget.Toast;

public class act03 extends Activity{

    private final String TAG="ACT003";
    
    private static Context mContext;
    @Override
    public void finish() {
        // TODO Auto-generated method stub
        super.finish();
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        
        ActBroadcastReceiver m=new ActBroadcastReceiver();
        
    }

    @Override
    public View onCreateView(String name, Context context, AttributeSet attrs) {
        // TODO Auto-generated method stub
        mContext=context;
        return super.onCreateView(name, context, attrs);
    }

    @Override
    protected void onDestroy() {
        // TODO Auto-generated method stub
        super.onDestroy();
        
    }

    public static class ActBroadcastReceiver extends BroadcastReceiver{

        @Override
        public void onReceive(Context context, Intent intent) {
            // TODO Auto-generated method stub
            Log.i("ACT03","**************************************");
            
        }
        
    }
    
}

 

下面是AndroidManifest.xml文件的配置:这个文件中的写法,主类和内部类的写法

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

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />
    
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        
        <receiver
            android:name=".act03$ActBroadcastReceiver">
            <intent-filter >
                <action android:name="com.tf.ACTION"/>
            </intent-filter>
        </receiver>
            
        <activity
            android:name="com.example.androidbroadcastdemo.MainActivity"
            android:process=":sipStack"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.androidbroadcastdemo.receiverget"
            android:label="@string/app_name" >
        </activity>
        <activity
            android:name="com.example.androidbroadcastdemo.act03"
            android:process=":sip"
            android:label="@string/app_name" >
        </activity>
    </application>

</manifest>

布局文件只是增加了一个按钮:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView1"
        android:layout_marginLeft="14dp"
        android:layout_marginTop="98dp"
        android:layout_toRightOf="@+id/textView1"
        android:text="send" />

</RelativeLayout>

 

运行既可以看到内中类收到广播,并且用Toast显示出来.......................