android BroadcastReceiver

AndroidManifast.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.hanqi.testbr">
    <!--接收开机完成的广播权限-->
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>

    <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>

        <receiver
            android:name=".MyReceiver"
            android:enabled="true"
            android:exported="true">
            <intent-filter android:priority="20">
                <action android:name="com.hanqi.textbr.action" />
            </intent-filter>
        </receiver>

        <service android:name=".BootService"/>
        <receiver
            android:name=".BootReceiver"
            android:enabled="true"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED"/>
            </intent-filter>
        </receiver>
    </application>

</manifest>

activity_main.xml

<?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: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="com.hanqi.testbr.MainActivity"
    android:orientation="vertical">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="发送一般广播"
        android:onClick="bt1_onclick"/>
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="发送有序广播"
        android:onClick="bt2_onclick"/>
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="动态注册广播接收器"
        android:onClick="bt3_onclick"/>
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="解注册广播接收器"
        android:onClick="bt4_onclick"/>

</LinearLayout>

MainActivity.java

package com.hanqi.testbr;

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

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    public void bt1_click(View v)
    {
        //发送一般广播
        //1.准备意图Intent
        Intent intent = new Intent("com.hanqi.textbr.action");

        intent.putExtra("data","广播发出了");
        //2.发送
        sendBroadcast(intent);

        Toast.makeText(MainActivity.this, "我发送了广播", Toast.LENGTH_SHORT).show();
    }
    public void bt2_click(View v)
    {
        //发送有序广播
        //1.准备意图Intent
        Intent intent = new Intent("com.hanqi.textbr.action");

        intent.putExtra("data", "有序广播发出了");
        //2.发送
        sendOrderedBroadcast(intent, null);

        Toast.makeText(MainActivity.this, "我发送了有序广播", Toast.LENGTH_SHORT).show();
    }
    MyReceiver2 myReceiver2;
    public void bt3_onclick(View v)
    {
        if (myReceiver2 == null) {
            //动态注册
            //1.实例化接收器
            myReceiver2 = new MyReceiver2();
            //2.实例化IntentFilter
            IntentFilter intentFilter = new IntentFilter("com.hanqi.textbr.action");

            intentFilter.setPriority(1000);

            //3.注册

            registerReceiver(myReceiver2, intentFilter);
        }
    }
    public void bt4_onclick(View v)
    {
        //解注册
        if (myReceiver2 != null) {
            unregisterReceiver(myReceiver2);
            myReceiver2 = null;

            Toast.makeText(MainActivity.this, "解注册接收器", Toast.LENGTH_SHORT).show();
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (myReceiver2 != null) {
            unregisterReceiver(myReceiver2);

            myReceiver2 =null;
            //Toast.makeText(MainActivity.this, "解注册接收器", Toast.LENGTH_SHORT).show();
        }
    }
}

MyReceiver.java

package com.hanqi.testbr;

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

public class MyReceiver extends BroadcastReceiver {
    public MyReceiver() {
        Log.e("ATG","构造广播接收器");
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        String str = intent.getStringExtra("data");

        // 处理广播
        Log.e("ATG","收到广播了 = "+str);

        Toast.makeText(context, "收到广播了 = "+str, Toast.LENGTH_SHORT).show();
        //是否是有序广播
        if (isOrderedBroadcast())
        {
            abortBroadcast();
            Log.e("ATG", "我阻断了有序广播");
            Toast.makeText(context, "我阻断了有序广播", Toast.LENGTH_SHORT).show();
        }

    }
}

MyReceiver2.java

package com.hanqi.testbr;

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

public class MyReceiver2 extends BroadcastReceiver {
    public MyReceiver2() {
        Log.e("ATG","构造广播接收器2");
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        String str = intent.getStringExtra("data");

        // 处理广播
        Log.e("ATG","收到广播了2 = "+str);

    }
}