我开发了 Android Wear 表盘，它在手持端的服务中获取位置。我使用从这里获得的 AsyncTask 代码。 此错误会耗尽手机约 50% 的电量。我不知道为什么。请帮忙。 错误:
W/MessageQueue: Handler (android.location.LocationManager$ListenerTransport$1) {93795ca} sending message to a Handler on a dead thread
java.lang.IllegalStateException: Handler (android.location.LocationManager$ListenerTransport$1) {93795ca} sending message to a Handler on a dead thread
at android.os.MessageQueue.enqueueMessage(MessageQueue.java:543)
at android.os.Handler.enqueueMessage(Handler.java:631)
at android.os.Handler.sendMessageAtTime(Handler.java:600)
at android.os.Handler.sendMessageDelayed(Handler.java:570)
at android.os.Handler.sendMessage(Handler.java:507)
at android.location.LocationManager$ListenerTransport.onLocationChanged(LocationManager.java:248)
at android.location.ILocationListener$Stub.onTransact(ILocationListener.java:58)
at android.os.Binder.execTransact(Binder.java:453)
我的服务:
public class WeatherService extends WearableListenerService {
private void startTask() {
Log.d(TAG, "Start Weather AsyncTask");
mGoogleApiClient = new GoogleApiClient.Builder(this).addApi(Wearable.API).build();
mLocationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
// getting GPS status
isGPSEnabled = mLocationManager
.isProviderEnabled(LocationManager.GPS_PROVIDER);
// getting network status
isNetworkEnabled = mLocationManager
.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled && !isNetworkEnabled) {
Log.d(TAG, "no network provider is enabled");
// no network provider is enabled
} else {
this.canGetLocation = true;
Log.d(TAG, "canGetLocation" + isGPSEnabled + isNetworkEnabled);
if (isNetworkEnabled) {
mLocationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
0,
0, new LocationListener() {
@Override
public void onLocationChanged(Location location) {
Log.d(TAG, "onLocationChanged: " + location);
//mLocation = location;
mLocationNetwork = location;
Task task = new Task();
task.execute();
Log.v(TAG, "isNetworkEnabled onLocationChanged: " + mLocationNetwork);
if (mLocationManager != null) {
mLocationManager.removeUpdates(this);
}
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
Log.d(TAG, "onLocationChanged: " + location);
if (mLocationManager != null) {
mLocationManager.removeUpdates(this);
}
//mLocation = location;
mLocationNetwork = location;
}
@Override
public void onProviderEnabled(String provider) {
if (mLocationManager != null) {
mLocationManager.removeUpdates(this);
}
}
@Override
public void onProviderDisabled(String provider) {
if (mLocationManager != null) {
mLocationManager.removeUpdates(this);
}
}
});
Log.d("Network", "Network Enabled");
if (mLocationManager != null) {
location = mLocationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
Log.d(TAG, "Network Enabled: lat and long: " + latitude + longitude);
Task task = new Task();
task.execute();
Log.v(TAG, "isNetworkEnabled mLocationManager != null: " + location + latitude + longitude);
}
}
}
// if GPS Enabled get lat/long using GPS Services
if (isGPSEnabled) {
if (location == null) {
mLocationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
0,
0, new LocationListener(){
@Override
public void onLocationChanged( Location location )
{
Log.d( TAG, "onLocationChanged: " + location );
//mLocation = location;
mLocationNetwork = location;
Task task = new Task();
task.execute();
Log.v(TAG, "isGPSEnabled onLocationChanged: " + mLocationNetwork);
if (mLocationManager != null) {
mLocationManager.removeUpdates(this);
}
}
@Override
public void onStatusChanged( String provider, int status, Bundle extras )
{
Log.d( TAG, "onLocationChanged: " + location );
//mLocation = location;
mLocationNetwork = location;
if (mLocationManager != null) {
mLocationManager.removeUpdates(this);
}
}
@Override
public void onProviderEnabled( String provider )
{
if (mLocationManager != null) {
mLocationManager.removeUpdates(this);
}
}
@Override
public void onProviderDisabled( String provider )
{
if (mLocationManager != null) {
mLocationManager.removeUpdates(this);
}
}
});
Log.d("GPS", "GPS Enabled");
if (mLocationManager != null) {
location = mLocationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
Log.d(TAG, "GPS Enabled: lat and long: " + latitude + longitude);
Task task = new Task();
task.execute();
Log.v(TAG, "isGPSEnabled mLocationManager != null: " + location + latitude + longitude);
}
}
}
}
}
}
这是 ASyncTask:
private class Task extends AsyncTask
{
private String resp;
@Inject
IWeatherApi api;
@Override
protected Object doInBackground( Object[] params )
{
if (this.isCancelled()) {
return null;
}
try
{
Log.d( TAG, "Task Running" );
RoboGuice.getInjector( WeatherService.this.getApplicationContext() ).injectMembers( this );
if ( !mGoogleApiClient.isConnected() )
{ mGoogleApiClient.connect();
}
final DataMap config = new DataMap();
WeatherInfo infoNetwork = api.getCurrentWeatherInfo(latitude, longitude);
config.putInt( KEY_WEATHER_TEMPERATURE, infoNetwork.getTemperature() );
config.putString( KEY_WEATHER_CONDITION, infoNetwork.getCondition() );
config.putLong( KEY_WEATHER_SUNSET, infoNetwork.getSunset() );
config.putLong( KEY_WEATHER_SUNRISE, infoNetwork.getSunrise() );
config.putInt( KEY_WEATHER_WIND_SPEED, infoNetwork.getSpeed() );
config.putInt( KEY_WEATHER_WIND_DEGREE, infoNetwork.getDeg() );
config.putInt( KEY_WEATHER_TEMP_MIN, infoNetwork.getTempMin() );
config.putInt( KEY_WEATHER_TEMP_MAX, infoNetwork.getTempMax() );
config.putInt( KEY_WEATHER_HUMIDITY, infoNetwork.getHumidity() );
config.putInt( KEY_WEATHER_PRESSURE, infoNetwork.getPressure() );
Wearable.MessageApi.sendMessage(mGoogleApiClient, mPeerId, PATH_WEATHER_INFO, config.toByteArray())
.setResultCallback(
new ResultCallback<MessageApi.SendMessageResult>() {
@Override
public void onResult(MessageApi.SendMessageResult sendMessageResult) {
Log.d(TAG, "SendUpdateMessage: " + sendMessageResult.getStatus());
Log.v(TAG, KEY_WEATHER_CONDITION);
Log.v(TAG, "AsyncTask config in onResult: " + config.toString());
Log.v(TAG, "mGoogleApiClient, mPeerId, PATH_WEATHER_INFO, config.toByteArray()" + mGoogleApiClient + " " + mPeerId + " " + PATH_WEATHER_INFO + " " + config);
}
}
);
}catch (IllegalStateException e) {
e.printStackTrace();
resp = e.getMessage();
}
catch ( Exception e )
{
Log.d( TAG, "Task Fail: " + e );
}
return null;
}
}
请帮忙，我是一名新开发人员，正在尝试解决这个问题，但目前没有任何结果。
最佳答案
您的错误 Handler on a dead thread 可能来自服务，该服务在完成后立即死亡。您可以使用 IntentService在调用 onHandleIntent 方法时创建一个新线程，然后在 onHandleIntent 方法返回时立即终止线程。
尝试在其他地方创建您的监听器，IntentService 对于设置监听器是不安全的，因为它们会死掉。它主要用于执行 main thread 之外的短任务。 .
这是一个可以帮助您解决问题的相关 SO 票证:Sending message to a Handler on a dead thread when getting a location from an IntentService
关于android - 在服务中获取位置时向死线程上的处理程序发送消息，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39045603/