自定义BroadcastReceiver

MainActivity.kt

package com.example.fredric.mybroadcast

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

class MainActivity : AppCompatActivity() {

    var sendBroadCastBtn: Button? = null
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        sendBroadCastBtn = findViewById<Button>(R.id.send_broadcast_btn)
        sendBroadCastBtn?.setOnClickListener({ _ ->            var intent = Intent("com.example.broadcasttest.MY_BROADCAST")
            sendBroadcast(intent)
        })
    }
}

MyBroadcastReceiver.kt

package com.example.fredric.mybroadcast

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

class MyBroadcastReceiver : BroadcastReceiver() {

    override fun onReceive(context: Context, intent: Intent) {
        Toast.makeText(context,"received in my broadcast Receiver!!",Toast.LENGTH_SHORT).show()
    }
}



AndroidManifest.xml

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

    <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=".MyBroadcastReceiver"            android:enabled="true"            android:exported="true">
            <intent-filter>
                <action android:name="com.example.broadcasttest.MY_BROADCAST" />
            </intent-filter>
        </receiver>
    </application>

</manifest>


成图效果，