我试图通过BroadcastReceiver检查wifi和移动设备的互联网连接。 Toast应显示连接更改。 我注册了接收器,但它没有显示变化。
package com.axa.conetividad;
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.v4.content.LocalBroadcastManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
//Muestra si el display debe de ser refrescada
public static boolean availableConnection = false;
public boolean isReceiverRegistered = false;
NetworkReceiver networkReceiver;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
networkReceiver = new NetworkReceiver();
registerReceiver();
}
@Override
public void onResume() {
super.onResume();
registerReceiver();
}
@Override
public void onPause() {
super.onPause();
LocalBroadcastManager.getInstance(this).unregisterReceiver(networkReceiver);
isReceiverRegistered = false;
}
private void registerReceiver() {
if (!isReceiverRegistered) {
//Registra el BroadCastReceiver para hacer el track de la red
IntentFilter filter = new IntentFilter();
filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
LocalBroadcastManager.getInstance(this).registerReceiver(networkReceiver, filter);
isReceiverRegistered = true;
}
}
public class NetworkReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
//Monitoreamos la conexión
ConnectivityManager conn = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = conn.getActiveNetworkInfo();
if (networkInfo != null && networkInfo.getType() == ConnectivityManager.TYPE_WIFI && networkInfo.isConnected()) {
availableConnection = true;
Toast.makeText(context, " wifi", Toast.LENGTH_SHORT).show();
} else if (networkInfo != null && networkInfo.getType() == ConnectivityManager.TYPE_MOBILE && networkInfo.isConnected()) {
availableConnection = true;
Toast.makeText(context, "mobile", Toast.LENGTH_SHORT).show();
} else {
availableConnection = false;
Toast.makeText(context, "No internet connection", Toast.LENGTH_SHORT).show();
}
}
}
}
这是我的清单。
<?xml version="1.0" encoding="utf-8"?>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
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>
</application>
答案 0 :(得分:1)
使用您活动的registerReceiver()
方法,
因此请更改此行
LocalBroadcastManager.getInstance(this).registerReceiver(networkReceiver, filter);
以强>
registerReceiver(networkReceiver,filter);
并且不要忘记在 onPause()方法中取消注册您的接收器
@Override
protected void onPause() {
if (networkReceiver != null) {
unregisterReceiver(networkReceiver);
networkReceiver = null
}
super.onPause();
}