1.新建一个项目，在activiy_main.xml中新建一个按钮，我们用来发送广播
activiy_main.xml↓↓↓

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="mylistview.lmq.cn.broadcasttest2.MainActivity01">

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</android.support.constraint.ConstraintLayout>

2.点击查看图片建立接收者的方法![J%V%BBR9V6R0Y(J$N~Z)OR.png
建立一个接受者 broader cast receiver ,名字随你定，这里我叫AnotherRecieviercastReciver，里面放置一个Toast就可以，让其显示信息我接收到了

package mylistview.lmq.cn.broadcasttest2;

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

public class AnotherReceivercastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO: This method is called when the BroadcastReceiver is receiving
        Toast.makeText(context,"recived in anotherBroadcastReceiver",Toast.LENGTH_SHORT).show();
    }
}

3.我们要配置AndroidMainifest.xml,我们在建立broadcastReceiver之后，系统自己给我门在这里面注册了

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="mylistview.lmq.cn.broadcasttest2">

    <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//这一部分就是啦
            android:name=".AnotherReceivercastReceiver"
            android:enabled="true"
            android:exported="true">
            <intent-filter>//这一句是我们加的
                <action android:name="com.example.broadcasttest.MY_BROADCAST"/>
           //我们接受的广播是com.example.broadcasttest.MY_BROADCAST这一种的广播
            </intent-filter>

        </receiver>
    </application>

</manifest>

4.我们来写MainActivity
将button加上监听，点击就会发送com.example.broadcasttest.MY_BROADCAST这一种的广播

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);
            }
        });
    }
}