1.看這篇文章之前請(qǐng)先看上一篇
http://www.itdecent.cn/p/fbe6ee0af9c3?utm_campaign=haruki&utm_content=note&utm_medium=reader_share&utm_source=qq
好，我們回歸正題
首先，我們建立一個(gè)項(xiàng)目，用來發(fā)送，建立一個(gè)按鈕用來充當(dāng)觸發(fā)器
添加MainActivity中代碼，給按鈕添加監(jiān)聽然后發(fā)送代碼如下

package mylistview.lmq.cn.broadcasttest2;

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

public class MainActivity01 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main01);
        Button button=findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=new Intent("com.example.broadcasttest.MY_BROADCAST");
                sendBroadcast(intent);
            }
        });
    }
}

2.我們新建一個(gè)項(xiàng)目，按照第一個(gè)文章的方法建立一個(gè)接收者
在其中顯示信息，我這里打印為 i have already receiver。
代碼同第一篇文章，我將其貼在這，注意發(fā)送和接受的廣播是同一種，這里為com.example.broadcasttest.MY_BROADCAST

package mylistview.lmq.cn.broadcastreciver;

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

public class MyReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO: This method is called when the BroadcastReceiver is receiving
        // an Intent broadcast.
        Toast.makeText(context,"i hava aleadly reciver",Toast.LENGTH_SHORT).show();
    }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="mylistview.lmq.cn.broadcastreciver">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        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>
                    <action android:name="com.example.broadcasttest.MY_BROADCAST"/>
                </intent-filter>

        </receiver>
    </application>

</manifest>

3.分別運(yùn)行兩個(gè)程序后，點(diǎn)擊發(fā)送者的按鈕，你會(huì)發(fā)現(xiàn)底下會(huì)打印出一條信息

4.發(fā)送有序廣播
在你建立多個(gè)接收者的時(shí)候你會(huì)發(fā)現(xiàn)，打印信息都會(huì)出來，但是順序是怎樣的呢？所以這里我們給他們規(guī)定一下優(yōu)先級(jí)
在接收者的配置文件中加上優(yōu)先級(jí)代碼priority=""如下：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="mylistview.lmq.cn.broadcastreciver2">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity01">
            <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="100">//這里我添加的是100
                                                //，數(shù)字越大，優(yōu)先級(jí)越高
                <action android:name="com.example.broadcasttest.MY_BROADCAST"/>
            </intent-filter>
        </receiver>
    </application>

</manifest>

運(yùn)行一下你發(fā)現(xiàn)添加有優(yōu)先級(jí)的會(huì)在前面顯示了
5.我們可不可以中斷呢？我只想顯示一條或幾條，因?yàn)槭前凑諆?yōu)先級(jí)的順序進(jìn)行顯示，所以你哪一個(gè)想要阻斷，后面優(yōu)先級(jí)低的就不會(huì)顯示了，
很簡單添加一個(gè)方法就可以
abortBroadcast()；

package mylistview.lmq.cn.broadcastreciver2;

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

public class MyReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO: This method is called when the BroadcastReceiver is receiving
        // an Intent broadcast.
        Toast.makeText(context,"i hava alrealy reciver 2",Toast.LENGTH_SHORT).show();
        abortBroadcast();//阻斷傳遞
    }
}