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我新的Android开发方面，我特林创建一个应用程序，它得到您的坐标，这样的教程http://developer.android.com/training/location/receive-location-updates.html 但我的应用程序崩溃。我没有到最后一部分“保存活动的状态”，因为我不知道我的LOCATION_KEY或REQUESTING_LOCATION_UPDATES_KEY是什么。Android的位置应用程序崩溃
我的代码：
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentSender;
import android.location.Location;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GoogleApiAvailability;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.common.SupportErrorDialogFragment;
import java.text.DateFormat;
import java.util.Date;
public class StepCounter extends FragmentActivity implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener {
// Request code to use when launching the resolution activity
private static final int REQUEST_RESOLVE_ERROR = 1001;
// Unique tag for the error dialog fragment
private static final String DIALOG_ERROR = "dialog_error";
// Bool to track whether the app is already resolving an error
private boolean mResolvingError = false;
//keys
protected final static String REQUESTING_LOCATION_UPDATES_KEY = "requesting-location-updates-key";
protected final static String LOCATION_KEY = "location-key";
protected final static String LAST_UPDATED_TIME_STRING_KEY = "last-updated-time-string-key";
GoogleApiClient mGoogleApiClient;
TextView mLatitudeText;
TextView mLongitudeText;
TextView mcLatitudeText;
TextView mcLongitudeText;
Location mLastLocation;
Location mCurrentLocation;
LocationRequest mLocationRequest;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_step_counter);
mLatitudeText = (TextView) findViewById(R.id.lat);
mLongitudeText = (TextView) findViewById(R.id.lon);
mcLatitudeText = (TextView) findViewById(R.id.llat);
mcLongitudeText = (TextView) findViewById(R.id.llon);
mResolvingError = savedInstanceState != null
&& savedInstanceState.getBoolean(STATE_RESOLVING_ERROR, false);
createLocationRequest();
buildGoogleApiClient();
}
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
@Override
protected void onStart() {
super.onStart();
if(!mResolvingError)
mGoogleApiClient.connect();
}
@Override
protected void onStop() {
AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(StepCounter.this);
dialogBuilder.setMessage("onStop");
dialogBuilder.setPositiveButton("Ok", null);
dialogBuilder.show();
mGoogleApiClient.disconnect();
super.onStop();
}
public void onConnected(Bundle connectionHint) {
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
mGoogleApiClient);
mCurrentLocation = mLastLocation;
if (mLastLocation != null) {
mLatitudeText.setText(String.valueOf(mLastLocation.getLatitude()));
mLongitudeText.setText(String.valueOf(mLastLocation.getLongitude()));
}
//modified
startLocationUpdates();
}
//pana aici merge de aici vine partea cu update
protected void startLocationUpdates() {
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
}
protected void createLocationRequest() {
LocationRequest mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(10000);
mLocationRequest.setFastestInterval(5000);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}
@Override
public void onLocationChanged(Location location) {
AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(StepCounter.this);
dialogBuilder.setMessage("onLocationChanged");
dialogBuilder.setPositiveButton("Ok", null);
dialogBuilder.show();
mLastLocation = mCurrentLocation;
mCurrentLocation = location;
updateUI();
}
public void updateUI()
{
mLatitudeText.setText(String.valueOf(mLastLocation.getLatitude()));
mLongitudeText.setText(String.valueOf(mLastLocation.getLongitude()));
mcLatitudeText.setText(String.valueOf(mCurrentLocation.getLatitude()));
mcLongitudeText.setText(String.valueOf(mCurrentLocation.getLongitude()));
}
@Override
protected void onPause() {
super.onPause();
stopLocationUpdates();
}
protected void stopLocationUpdates() {
LocationServices.FusedLocationApi.removeLocationUpdates(
mGoogleApiClient, this);
}
@Override
public void onResume() {
super.onResume();
if (mGoogleApiClient.isConnected()) {
startLocationUpdates();
}
}
// De aici partea cu rezolvatu problemei
@Override
public void onConnectionSuspended(int i) {
//todo nust...
}
@Override
public void onConnectionFailed(ConnectionResult result) {
if (mResolvingError) {
// Already attempting to resolve an error.
return;
} else if (result.hasResolution()) {
try {
mResolvingError = true;
result.startResolutionForResult(this, REQUEST_RESOLVE_ERROR);
} catch (IntentSender.SendIntentException e) {
// There was an error with the resolution intent. Try again.
mGoogleApiClient.connect();
}
} else {
// Show dialog using GoogleApiAvailability.getErrorDialog()
showErrorDialog(result.getErrorCode());
mResolvingError = true;
}
}
// The rest of this code is all about building the error dialog
/* Creates a dialog for an error message */
private void showErrorDialog(int errorCode) {
// Create a fragment for the error dialog
ErrorDialogFragment dialogFragment = new ErrorDialogFragment();
// Pass the error that should be displayed
Bundle args = new Bundle();
args.putInt(DIALOG_ERROR, errorCode);
dialogFragment.setArguments(args);
dialogFragment.show(getFragmentManager(), "errordialog");
}
/* Called from ErrorDialogFragment when the dialog is dismissed. */
public void onDialogDismissed() {
mResolvingError = false;
}
/* A fragment to display an error dialog */
public static class ErrorDialogFragment extends DialogFragment {
public ErrorDialogFragment() { }
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Get the error code and retrieve the appropriate dialog
int errorCode = this.getArguments().getInt(DIALOG_ERROR);
return GoogleApiAvailability.getInstance().getErrorDialog(
this.getActivity(), errorCode, REQUEST_RESOLVE_ERROR);
}
@Override
public void onDismiss(DialogInterface dialog) {
((StepCounter) getActivity()).onDialogDismissed();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_RESOLVE_ERROR) {
mResolvingError = false;
if (resultCode == RESULT_OK) {
// Make sure the app is not already connected or attempting to connect
if (!mGoogleApiClient.isConnecting() &&
!mGoogleApiClient.isConnected()) {
mGoogleApiClient.connect();
}
}
}
}
private static final String STATE_RESOLVING_ERROR = "resolving_error";
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putBoolean(STATE_RESOLVING_ERROR, mResolvingError);
}
}
这是我的清单：
<?xml version="1.0" encoding="utf-8"?>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
//android:theme="@android:style/Theme.Holo"
<activity
android:name=".LoginScreen"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Register"
android:label="@string/title_activity_register" >
</activity>
<activity
android:name=".MainActivity"
android:label="@string/title_activity_main" >
</activity>
<activity
android:name=".StepCounter"
android:label="@string/title_activity_step_counter" >
</activity>
</application>
当我跑我的模拟器应用程序（它没有按”没有谷歌服务），我点击th e更新谷歌服务，我得到这个错误（我不认为这是问题，因为我的手机上有谷歌服务）：
08-26 09:54:24.640 7191-7191/com.persasrl.paul.quickfit E/SettingsRedirect﹕ Can't redirect to app settings for Google Play services
08-26 09:54:24.653 7191-7191/com.persasrl.paul.quickfit D/AndroidRuntime﹕ Shutting down VM
08-26 09:54:24.654 7191-7191/com.persasrl.paul.quickfit E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.persasrl.paul.quickfit, PID: 7191
java.lang.RuntimeException: Unable to pause activity {com.persasrl.paul.quickfit/com.persasrl.paul.quickfit.StepCounter}: java.lang.IllegalStateException: GoogleApiClient is not connected yet.
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3613)
at android.app.ActivityThread.access$1300(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1352)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5257)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.IllegalStateException: GoogleApiClient is not connected yet.
at com.google.android.gms.common.api.zzf.zzb(Unknown Source)
at com.google.android.gms.common.api.zzg.zzb(Unknown Source)
at com.google.android.gms.location.internal.zzd.removeLocationUpdates(Unknown Source)
at com.persasrl.paul.quickfit.StepCounter.stopLocationUpdates(StepCounter.java:148)
at com.persasrl.paul.quickfit.StepCounter.onPause(StepCounter.java:144)
at android.app.Activity.performPause(Activity.java:6101)
at android.app.Instrumentation.callActivityOnPause(Instrumentation.java:1310)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3603)
我试图删除startLocationUpdates的一部分，它不会再崩溃。 ..但也不会更新位置...
能ATLEAST有人告诉我什么LOCATION_KEY或REQUESTING_LOCATION_UPDATES_KEY是谁？ –
我怀疑有与startLocationUpdates一个问题，因为当我删除它，它不会崩溃，即使我让TI是我没有得到locationChanged的alertdialog –