package com.example.broadcasttest;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
private IntentFilter intentFilter;
private NetworkChangeReceive networkChangeReceive;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
intentFilter = new IntentFilter();
intentFilter.addAction("网络改变");
networkChangeReceive = new NetworkChangeReceive();
registerReceiver(networkChangeReceive,intentFilter);
Toast.makeText(this.getBaseContext(),"开始了啊",
Toast.LENGTH_SHORT
).show();
}
@Override
protected void onDestroy() {
super.onDestroy();
unregisterReceiver(networkChangeReceive);
}
class NetworkChangeReceive extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
ConnectivityManager connectivityManager
= (ConnectivityManager) getSystemService(context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
if(networkInfo != null && networkInfo.isAvailable()){
Toast.makeText(context,"network is 可用",
Toast.LENGTH_SHORT
).show();
Log.d(TAG, "onReceive:可用 ");
}else {
Toast.makeText(context,"network is 不能用",
Toast.LENGTH_SHORT
).show();
Log.d(TAG, "onReceive:不能用 ");
}
}
}
}
New - > Other ->Broadcast Reciver 新建一个BootCompleteReceiver:
package com.example.broadcasttest;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;
public class BootCompleteReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
// throw new UnsupportedOperationException("Not yet implemented");
Toast.makeText(context,"Boot 完成 ",Toast.LENGTH_LONG).show();
}
}
修改AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.broadcasttest">
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<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=".BootCompleteReceiver"
android:enabled="true"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"/>
</intent-filter>
</receiver>
</application>
</manifest>