动态注册和注销BroadercasterReceive（二）

有时候不需要监听广播是否有消息，所以可以使用动态注册的方式。即不需要再androidmanifest.xml中注册。

 

主要代码如下：

package com.example.yabushan.broadercastreceiver;

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

public class MyReceiver extends BroadcastReceiver {
　　//注意：这里是上边的包名+intent.action.MyRecerver(作为隐示Intent调用)
    public  final String ACTION="com.example.yabushan.broadercastreceiver.intent.action.MyReceiver";
    public MyReceiver() {
    }

    @Override
    public void onReceive(Context context, Intent intent) {
       System.out.println("接收到广播数据："+intent.getStringExtra("DATA").toString());
    }
}

　　

package com.example.yabushan.broadercastreceiver;

import android.content.Intent;
import android.content.IntentFilter;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        findViewById(R.id.deleverData).setOnClickListener(this);
        findViewById(R.id.reg).setOnClickListener(this);
        findViewById(R.id.unreg).setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.deleverData:
                //这里需要使用隐示Intent
               // Intent  intent=new Intent(this,MyReceiver.class);
                Intent intent=new Intent(myReceiver.ACTION);
                intent.putExtra("DATA","您好");
                sendBroadcast(intent);
                break;
            case R.id.reg:

                if(myReceiver==null){
                    myReceiver =new MyReceiver();
                    registerReceiver(myReceiver,new IntentFilter(myReceiver.ACTION));
                }
                break;
            case  R.id.unreg:
                if(myReceiver!=null){
                    //
                    unregisterReceiver(myReceiver);
                }
                break;
        }
    }

    private MyReceiver myReceiver=null;
}

　　

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

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme" >
        <activity android:name=".MainActivity" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

    </application>

</manifest>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">

    <TextView android:text="Hello World!" android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="传递消息"
        android:id="@+id/deleverData"
        android:layout_centerVertical="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="注册"
        android:id="@+id/reg" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="注销"
        android:id="@+id/unreg" />
</LinearLayout>