电池无活动状态仅使用broadcastreceiver

Question

嗨，我正在制作一个只使用广播接收器的应用程序。它有三个目的。当接收到包含特定代码的SMS时，它发送GPS数据。另一个代码发送传感器数据。到目前为止，没有任何问题。但是对于电池，我无法做到这一点，因为注册接收器()函数。由于我没有使用activity和onCreate方法，我可以在收到短信时发送电池数据吗？

当我试图在broadcastreceiver的onreceive()方法中调整它时，我的应用程序崩溃了。我搜索了所有创建活动的地方。我只想在广播接收器内做所有的事情。

我的代码是这样的：

public class MyPhoneReceiver extends BroadcastReceiver{
double current_lat,current_lng;
LocationManager mlocManager;
LocationListener mlocListener;
//addition//////////////////////////////
SensorManager mSensorManager;

Sensor mAccelerometer;  
////////////////////

private static final String SMS_RECEIVED = "android.provider.Telephony.SMS_RECEIVED";
private static final String TAG = "SMSBroadcastReceiver";

@Override
public void onReceive(Context context, Intent intent) {
Log.i(TAG, "Intent recieved: rama" + intent.getAction());


Bundle bundle = intent.getExtras();
if (bundle != null) {
Object[] pdus = (Object[]) bundle.get("pdus");
final SmsMessage[] messages = new SmsMessage[pdus.length];
for (int i = 0; i < pdus.length; i++)
messages[i] = SmsMessage.createFromPdu((byte[]) pdus[i]);
if (messages.length > -1) {
String messagebody=messages[0].getMessageBody();
Log.i(TAG, "Message recieved: in message receied " + messages[0].getMessageBody());
if(messagebody.toString().matches("HDPK GPS"))
{
Log.i(TAG, "Message recieved: HDPK RECEIVED " + messages[0].getMessageBody());
mlocManager=(LocationManager)context.getSystemService(context.LOCATION_SERVICE);
mlocManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,1000,1,new MyLocationListener());
}
if(messagebody.toString().matches("HDPK SENS"))
{
Log.i(TAG, "Message recieved: in msensior ");
mSensorManager = (SensorManager)context.getSystemService(Context.SENSOR_SERVICE);
mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
mSensorManager.registerListener(new MySensorListener(), mAccelerometer, SensorManager.SENSOR_DELAY_NORMAL);
}
if(messagebody.toString().matches("HDPK BAT"))
{
Log.i(TAG, "Message recieved: in battery ");
IntentFilter filter=new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
Intent batt=context.registerReceiver(null,filter);
int level = batt.getIntExtra("EXTRA_LEVEL", 0);
Log.i(TAG, "Message recieved: in battery level is "+level);
SmsManager sender=SmsManager.getDefault();
sender.sendTextMessage("9762281814", null, "Level is"+level, null,null);
}



}
}
}

public class MySensorListener implements SensorEventListener
{
public void onAccuracyChanged(Sensor arg0, int arg1) {
// TODO Auto-generated method stub

}

public void onSensorChanged(SensorEvent event) {
// TODO Auto-generated method stub
Log.i(TAG, "Message recieved: in msensior event change ");
float x = event.values[0];

float y = event.values[1];

float z = event.values[2];
SmsManager sender=SmsManager.getDefault();
String Text="x :"+x+" Y:"+y+ " Z:"+z;
sender.sendTextMessage("9762281814",null, Text, null, null);
mSensorManager.unregisterListener(this);
}

}

public class MyLocationListener implements LocationListener{

public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
current_lat=location.getLatitude();
current_lng=location.getLongitude();
SmsManager sender=SmsManager.getDefault();
String Text = "My Location is : Latitude ->" +current_lat+" Longitude ->" + current_lng;
sender.sendTextMessage("9762281814", null, Text, null, null);

mlocManager.removeUpdates(this);

}

public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub

}

public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub

}

public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub

}


}

}

Answer 1

在使用registerReceiver()更换粘滞电池的Intent时，尝试使用应用程序Context而不是广播接收器Context。如下所示：

IntentFilter filter=new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
Intent batt=context.getApplicationContext().registerReceiver(null,filter);
int level = 99; // Default to some unknown/wild value
// registerReceiver method call could return null, so check that!
if (batt != null) {
    level = batt.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
}