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這篇文章主要介紹了Android中如何使用本地廣播的相關(guān)知識,內(nèi)容詳細(xì)易懂,操作簡單快捷,具有一定借鑒價(jià)值,相信大家閱讀完這篇Android中如何使用本地廣播文章都會有所收獲,下面我們一起來看看吧。
MainActivity代碼
package com.example.luobo.mybroadcastreceiver; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.support.v4.content.LocalBroadcastManager; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.Toast; public class MainActivity extends AppCompatActivity implements View.OnClickListener{ private Button button; private IntentFilter intentFilter; private LocalBroadcastManager localBroadcastManager ; private LocalReceiver localReciiver; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); button = (Button)findViewById(R.id.send_button); button.setOnClickListener(this); localBroadcastManager = LocalBroadcastManager.getInstance(this);//使用 intentFilter = new IntentFilter(); intentFilter.addAction("com.example.luobo.mybroadcastreceiver.LOCAL_BROADCAST"); localReciiver = new LocalReceiver(); localBroadcastManager.registerReceiver(localReciiver,intentFilter); } @Override protected void onDestroy() { super.onDestroy(); localBroadcastManager.unregisterReceiver(localReciiver); } @Override public void onClick(View view) { Intent intent = new Intent("com.example.luobo.mybroadcastreceiver.LOCAL_BROADCAST"); localBroadcastManager.sendBroadcast(intent); } class LocalReceiver extends BroadcastReceiver{ @Override public void onReceive(Context context, Intent intent) { Toast.makeText(context,"received local broadcast",Toast.LENGTH_SHORT).show(); } } }
首先通過LocalBroadcastManager(本地廣播管理類)的getInstance(this)方法獲取實(shí)例,注冊廣播消息時(shí)是調(diào)用localBroadcastManager實(shí)例的registerReceiver(參數(shù)1,參數(shù)2)方法注冊(參數(shù)1是本地廣播接受者,參數(shù)2是過濾器只選擇接收特定的廣播消息),調(diào)用localBroadcastManager實(shí)例的sendBroadcast(Initent initent)方法發(fā)送廣播消息。
MyRecevity
package com.example.luobo.mybroadcastreceiver; 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) { Toast.makeText(context,"Received in MyBroadCastReceiver",Toast.LENGTH_SHORT).show(); abortBroadcast(); } }
activity_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="com.example.luobo.mybroadcastreceiver.MainActivity"> <Button android:id="@+id/send_button" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="發(fā)送廣播"/> </android.support.constraint.ConstraintLayout>
AndroidMainfest.aml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.luobo.mybroadcastreceiver"> <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 android:priority="100"> <action android:name="com.example.luobo.mybroadcastreceiver.LOCAL_BROADCAST"/> </intent-filter> </receiver> </application> </manifest>
關(guān)于“Android中如何使用本地廣播”這篇文章的內(nèi)容就介紹到這里,感謝各位的閱讀!相信大家對“Android中如何使用本地廣播”知識都有一定的了解,大家如果還想學(xué)習(xí)更多知識,歡迎關(guān)注億速云行業(yè)資訊頻道。
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