Question

有没有人知道在Android中获取电话服务状态（IN_SERVICE，OUT_OF_SERVICE，EMERGENCY_ONLY，POWER_OFF）的方法。

我希望有一个广播记录来识别这些变化，但我找不到任何东西。我知道有一个听众，但我不确定如何使用我的应用程序，因为它使用WakefulIntentService（通过thecommonsguy）作为服务运行。

有了类似电池电量的东西（即BATTERY_LOW，BATTERY_OKAY），这很容易，但我无法解决类似的电话服务变化问题。

Answer 1

注册接收器

public static final String ACTION_SERVICE_STATE_CHANGED = "android.intent.action.SERVICE_STATE";

当你对你的接收器有意图时，只需使用android源代码下面的小黑客

public void onReceive(Context context, Intent intent) {
    int state = intent.getExtras().getInt("state");
    if(state == ServiceState.STATE_IN_SERVICE)
    {
        //Do whatever you want
    }
    }

检查服务状态类的来源 http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android/1.5_r4/android/telephony/ServiceState.java#ServiceState.setFromNotifierBundle%28android.os.Bundle%29

Answer 2

您可以编写自己的BroadcastReceiver。您的接收器将接收连接更改并通知您所需的实例有关更改（例如您自己的CommunicationManager）：

public class ConnectivityReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {
    Log.i(getClass().getName(), "A change in network connectivity has occurred. Notifying communication manager for further action.");
    NetworkInfo info = intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);
    if(info != null) {
        Log.v(getClass().getName(), "Reported connectivity status is " + info.getState() + ".");
    }
    CommunicationManager.updateConnectivityState(); // Notify connection manager
}

}

例如，您的CommunicationManager实例将收到有关连接更改的通知：

protected static void updateConnectivityState()
{
    boolean isConnected = false;
    if (_connec != null && (_connec.getNetworkInfo(1).getState() == NetworkInfo.State.CONNECTED) ||(_connec.getNetworkInfo(0).getState() == NetworkInfo.State.CONNECTED)){ 
        isConnected = true;
        Log.i(CommunicationManager.class.getName(), "Device is connected to the network. Online mode is available.");
    }else if (_connec.getNetworkInfo(0).getState() == NetworkInfo.State.DISCONNECTED ||  _connec.getNetworkInfo(1).getState() == NetworkInfo.State.DISCONNECTED ) {             
        isConnected = false;
        Log.w(CommunicationManager.class.getName(), "Device is NOT connected to the network. Offline mode.");
    }
    _isConnected = isConnected;
}

查看NetworkInfo课程，了解有关连接可用性的更多详细信息。

不要忘记在清单中注册ACCESS_NETWORK_STATE权限：

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>

我希望这会有所帮助。此致

Broadcastreceiver获取ServiceState信息

2 个答案: