检查INTENT互联网连接
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是否有android Intent ACTION_XXX在Internet连接可用时通知我？
我想实例化一个BroadcastReceiver，当用户启用Internet连接时（通过wifi，GSM等）通知我的应用程序
谁能帮助我？
答案
<receiver android:name=".YOURRECEIVER">
<intent-filter>
<action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
</intent-filter>
</receiver>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
另一答案
**Also worked on above Android 7.0**
// AndroidManifest.xml
<service
android:name=".NetworkSchedulerService"
android:exported="true"
android:permission="android.permission.BIND_JOB_SERVICE"/>
// MyApplication.java
import android.app.Application;
import android.app.job.JobInfo;
import android.app.job.JobScheduler;
import android.content.ComponentName;
import android.content.Context;
public class MyApplication extends Application {
private static Context context;
public static Context getContext() {
return context;
}
public static final String TAG = MyApplication.class.getSimpleName();
private static MyApplication mInstance;
@Override
public void onCreate() {
super.onCreate();
context = getApplicationContext();
mInstance = this;
scheduleJob();
}
public static synchronized MyApplication getInstance() {
return mInstance;
}
private void scheduleJob()
{
JobInfo myJob = new JobInfo.Builder(0, new ComponentName(this, NetworkSchedulerService.class))
.setRequiresCharging(true)
.setMinimumLatency(1000)
.setOverrideDeadline(2000)
.setRequiredNetworkType(JobInfo.NETWORK_TYPE_ANY)
.setPersisted(true)
.build();
JobScheduler jobScheduler = (JobScheduler) getSystemService(Context.JOB_SCHEDULER_SERVICE);
assert jobScheduler != null;
jobScheduler.schedule(myJob);
}
}
// Constants.java
public class Constants {
public static final String CONNECT_TO_WIFI = "WIFI";
public static final String CONNECT_TO_MOBILE = "MOBILE";
public static final String NOT_CONNECT = "NOT_CONNECT";
public final static String CONNECTIVITY_ACTION = "android.net.conn.CONNECTIVITY_CHANGE";
}
// LiveConnectivityReceiver.java
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
public class LiveConnectivityReceiver extends BroadcastReceiver {
private MConnectivityReceiver mConnectivityReceiver;
LiveConnectivityReceiver(MConnectivityReceiver listener) {
mConnectivityReceiver = listener;
}
@Override
public void onReceive(Context context, Intent intent) {
mConnectivityReceiver.onNetworkConnectionChanged(isConnected(context));
}
public static boolean isConnected(Context context) {
ConnectivityManager cm = (ConnectivityManager)
context.getSystemService(Context.CONNECTIVITY_SERVICE);
assert cm != null;
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
return activeNetwork != null && activeNetwork.isConnectedOrConnecting();
}
public interface MConnectivityReceiver {
void onNetworkConnectionChanged(boolean isConnected);
}
}
// MainActivity.java
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
private BroadcastReceiver mReceiver;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
protected void onStop() {
stopService(new Intent(this, NetworkSchedulerService.class));
super.onStop();
}
@Override
protected void onStart() {
super.onStart();
startService( new Intent(this, NetworkSchedulerService.class));
}
@Override
protected void onPause() {
super.onPause();
this.unregisterReceiver(this.mReceiver);
}
@Override
protected void onResume() {
super.onResume();
IntentFilter intentFilter = new IntentFilter("android.intent.action.MAIN");
mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
boolean isConnection = intent.getBooleanExtra("VALUE", false);
if (!isConnection) {
Toast.makeText(context, "No Internet Connection", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(context, "Back to online", Toast.LENGTH_SHORT).show();
}
}
};
this.registerReceiver(mReceiver, intentFilter);
}
}
// NetworkSchedulerService.java
import android.app.job.JobParameters;
import android.app.job.JobService;
import android.content.Intent;
import android.content.IntentFilter;
public class NetworkSchedulerService extends JobService implements LiveConnectivityReceiver.ConnectivityReceiverListener
{
private LiveConnectivityReceiver mLiveConnectivityReceiver;
@Override
public void onCreate()
{
super.onCreate();
mLiveConnectivityReceiver = new LiveConnectivityReceiver(this);
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
return START_NOT_STICKY;
}
@Override
public boolean onStartJob(JobParameters params) {
registerReceiver(mLiveConnectivityReceiver, new IntentFilter(Constants.CONNECTIVITY_ACTION));
return true;
}
@Override
public boolean onStopJob(JobParameters params) {
unregisterReceiver(mLiveConnectivityReceiver);
return true;
}
@Override
public void onNetworkConnectionChanged(boolean isConnected)
{
Intent broadcastedIntent=new Intent("android.intent.action.MAIN");
broadcastedIntent.putExtra("VALUE", isConnected);
sendBroadcast(broadcastedIntent);
}
}
另一答案
From Android 7++, @fedj's answer will not work but you can register the broadcast receiver programmatically.
针对Android 7.0（API级别24）及更高版本的应用如果在其清单中声明广播接收器，则不会收到CONNECTIVITY_ACTION广播。如果应用程序使用Context.registerReceiver（）注册其BroadcastReceiver并且该上下文仍然有效，则仍会收到CONNECTIVITY_ACTION广播。
另一答案
我会阅读为nougat +更新的文档，因为由于设备数量而不推荐使用intent，仅靠网络信息是不够的。我会在那里使用连接管理器（连接操作，在那里添加变量）命令和变量，因为大多数在去年仅发生了变化，并且在测试时，启用单元数据始终处于活动状态，详细记录和积极切换，如果需要，请使用wlan过滤器：
https://developer.android.com/reference/android/net/ConnectivityManager.html#CONNECTIVITY_ACTION
另一答案
接受的答案是正确的。我只添加了Receiver代码来完成：
public class NetworkStateReceiver extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {
Log.d("app","Network connectivity change");
if(intent.getExtras()!=null) {
NetworkInfo ni=(NetworkInfo) intent.getExtras().get(ConnectivityManager.EXTRA_NETWORK_INFO);
if(ni!=null && ni.getState()==NetworkInfo.State.CONNECTED) {
Log.i("app","Network "+ni.getTypeName()+" connected");
} else if(intent.getBooleanExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY,Boolean.FALSE)) {
Log.d("app","There's no network connectivity");
}
}
}
另一答案
更新@lujop回答：
public class NetworkStateRecei以上是关于检查INTENT互联网连接的主要内容，如果未能解决你的问题，请参考以下文章