我正在尝试在我的应用程序中创建一个按钮，当用户单击它时，该按钮将收集设备的经度和纬度。按钮工作正常，但它没有从我的GPSHelper类调用类方法。任何帮助都将不胜感激。我正在测试并尝试在我的实际设备上，而不是模拟器，如果这有助于任何。谢谢你的帮助。
这是我的GPSHelper课程，我将放置所有权限检查和GPS使用代码。
import android.Manifest;
import android.app.Activity;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.os.Build;
import android.os.Bundle;
import android.os.IBinder;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.widget.Toast;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationServices;
/**
* This class takes care of capturing the location of the device.
*/
public class GPSHelper extends Service implements GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener, ActivityCompat.OnRequestPermissionsResultCallback{
private final Context mContext;
boolean isGpsEnabled = false;
private Location mLastLocation;
private GoogleApiClient mGoogleApiClient;
double mLatitude;
double mLongitude;
public GPSHelper(Context context) {
this.mContext = context;
}
public Location getLocation() {
mGoogleApiClient = new GoogleApiClient.Builder(mContext)
.addConnectionCallbacks(this).addOnConnectionFailedListener(this)
.addApi(LocationServices.API).build();
mGoogleApiClient.connect();
isGpsEnabled = mGoogleApiClient.isConnected();
if (isGpsEnabled){
mLatitude = mLastLocation.getLatitude();
mLongitude = mLastLocation.getLongitude();
Toast.makeText(this, String.valueOf(mLatitude), Toast.LENGTH_LONG).show();
Toast.makeText(this, String.valueOf(mLongitude), Toast.LENGTH_LONG).show();
mGoogleApiClient.disconnect();
}
return mLastLocation;
}
@Override
public void onConnected(@Nullable Bundle bundle) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ActivityCompat.checkSelfPermission(this.mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this.mContext, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this.mContext, Manifest.permission.INTERNET) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions((Activity) this.mContext,new String[]{Manifest.permission.ACCESS_FINE_LOCATION,
Manifest.permission.ACCESS_COARSE_LOCATION,Manifest.permission.INTERNET}, 10);
}
} else {
if (mLastLocation == null){
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
getLocation();
}else {
getLocation();
}
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch (requestCode){
case 10:
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
getLocation();
}else {
Toast.makeText(this, "Action Canceled\nGPS Is Required",Toast.LENGTH_LONG).show();
}
break;
default:
break;
}
}
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
}
以下是我尝试使用getLocation()类的实例调用GPSHelper类方法的活动。
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.Toast;
import com.example.bigdaddy.as_built_weldmapper.utilities.BendHelper;
import com.example.bigdaddy.as_built_weldmapper.utilities.GPSHelper;
public class SagActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener,
MajorButtonFragment.OnFragmentInteractionListener, Communicator{
/* Using this to insert into the Bend Direction field. */
public static String SAG_DIRECTION = "SAG";
/* This spinner holds the bend types */
Spinner mSagBendTypesSpinner;
/* Using this string to collect what was selected for the spinner type */
private String mBendTypeSpinnerVal;
/* All the EditText for the Activity */
private EditText mSagGpsShotEt;
private EditText mSagExistingGpsEt;
private EditText mSagCoverEt;
private EditText mSagDegreeEt;
private EditText mSagDistanceFromEt;
private EditText mSagNotesEt;
private EditText mSagOccupyIdEt;
private EditText mSagStationNumEt;
public GPSHelper mGPSHelper;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sag);
mGPSHelper = new GPSHelper(SagActivity.this);
/* checking if the MajorButtonFragment is null */
if (findViewById(R.id.majorButtonFragment) != null) {
if (savedInstanceState != null) {
return;
}
}
/* Referencing the spinner and setting the itemsSelectedListener */
mSagBendTypesSpinner = (Spinner) findViewById(R.id.bend_types_spinner);
mSagBendTypesSpinner.setOnItemSelectedListener((AdapterView.OnItemSelectedListener) this);
/* Create an ArrayAdapter using the string array and a default spinner layout */
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
R.array.bend_types_array, android.R.layout.simple_spinner_item);
/* Specify the layout to use when the list of choices appears */
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
/* Apply the adapter to the spinner */
mSagBendTypesSpinner.setAdapter(adapter);
/* Referencing and calling all the EditText for the Activity */
mSagGpsShotEt = (EditText) findViewById(R.id.eTextGpsShotForSag);
mSagExistingGpsEt = (EditText) findViewById(R.id.eTextExistGradeForSag);
mSagCoverEt = (EditText) findViewById(R.id.eTextCoverForSag);
mSagDegreeEt = (EditText) findViewById(R.id.eTextDegreeForSag);
mSagDistanceFromEt = (EditText) findViewById(R.id.eTextDistanceFromForSag);
mSagNotesEt = (EditText) findViewById(R.id.eTextNotesForSagActivity);
mSagOccupyIdEt = (EditText) findViewById(R.id.eTextJointIdSagActivity);
mSagStationNumEt = (EditText) findViewById(R.id.eTextStationNumSagActivity);
} /*onCreate() ends here.*/
@Override
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
mBendTypeSpinnerVal = mSagBendTypesSpinner.getSelectedItem().toString();
}
@Override
public void onNothingSelected(AdapterView<?> adapterView) {
}
@Override
public void exitBtnRespond() {
}
/**
* This overridden method comes from the Communicator Interface and is used globally in all
* Activities that implement it to Store (write) a transaction to the database.
* The utility class saveAndInsertBend() method is invoked here.
*/
@Override
public void storeBtnRespond() {
BendHelper.saveAndInsertBend(SagActivity.this, SAG_DIRECTION, mBendTypeSpinnerVal, mSagStationNumEt,
mSagOccupyIdEt, mSagDegreeEt, mSagDistanceFromEt, mSagGpsShotEt, mSagExistingGpsEt,
mSagCoverEt, mSagNotesEt);
}
@Override
public void mapItBtnRespond() {
Toast.makeText(this, "MapItBtn clicked in SagActivity",Toast.LENGTH_LONG).show();
mGPSHelper.getLocation();
}
@Override
public void onFragmentInteraction() {
}
@Override
protected void onStop() {
super.onStop();
}
}
重写的mapItBtnRespond()方法来自我拥有的Fragment类包含我的按钮，它确实有用。每次单击按钮时都会显示Toast消息，但不会要求任何权限。我在哪里错了所有这些？
此处还有Manifest文件，其中包含权限。
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.bigdaddy.as_built_weldmapper">
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/Theme.AppCompat.Light.DarkActionBar">
<!--android:theme="@style/AppTheme"> '-->
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<activity android:name=".WeldActivity">
</activity>
<activity android:name=".SagActivity">
</activity>
<activity android:name=".OverbendActivity">
</activity>
<activity android:name=".LtPiActivity">
</activity>
<activity android:name=".RtPiActivity">
</activity>
<activity android:name=".CmboObRtActivity">
</activity>
<activity android:name=".ComboObLtActivity">
</activity>
<activity android:name=".ComboSagRtActivity">
</activity>
<activity android:name=".ComboSagLtActivity">
</activity>
</application>
</manifest>
感谢您的帮助。
答案 0 :(得分：0)
这就是我如何获得持续的位置更新
<强> MyLocation.java
import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import java.util.Timer;
import java.util.TimerTask;
/**
* Created by Rana Shahzaib on 1/9/2017.
*/
public class MyLocation {
Context context;
MyLocation(Context context) {
this.context = context;
}
Timer timer1;
LocationManager lm;
LocationResult locationResult;
boolean gps_enabled = false;
boolean network_enabled = false;
public boolean getLocation(Context context, LocationResult result) {
//I use LocationResult callback class to pass location value from MyLocation to user code.
locationResult = result;
if (lm == null)
lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
//exceptions will be thrown if provider is not permitted.
try {
gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
} catch (Exception ex) {
}
try {
network_enabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
} catch (Exception ex) {
}
//Toast.makeText(context, gps_enabled+" "+network_enabled, Toast.LENGTH_LONG).show();
//don't start listeners if no provider is enabled
if (ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
}
if (!gps_enabled && !network_enabled)
return false;
if (gps_enabled)
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListenerGps);
if (network_enabled)
lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListenerNetwork);
timer1 = new Timer();
timer1.schedule(new GetLastLocation(), 10000);
return true;
}
LocationListener locationListenerGps = new LocationListener() {
public void onLocationChanged(Location location) {
timer1.cancel();
locationResult.gotLocation(location);
}
public void onProviderDisabled(String provider) {
}
public void onProviderEnabled(String provider) {
}
public void onStatusChanged(String provider, int status, Bundle extras) {
}
};
LocationListener locationListenerNetwork = new LocationListener() {
public void onLocationChanged(Location location) {
timer1.cancel();
locationResult.gotLocation(location);
}
public void onProviderDisabled(String provider) {
}
public void onProviderEnabled(String provider) {
}
public void onStatusChanged(String provider, int status, Bundle extras) {
}
};
class GetLastLocation extends TimerTask {
@Override
public void run() {
//Context context = getClass().getgetApplicationContext();
Location net_loc = null, gps_loc = null;
if (gps_enabled)
if (ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
gps_loc = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if(network_enabled)
net_loc=lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
//if there are both values use the latest one
if(gps_loc!=null && net_loc!=null){
if(gps_loc.getTime()>net_loc.getTime())
locationResult.gotLocation(gps_loc);
else
locationResult.gotLocation(net_loc);
return;
}
if(gps_loc!=null){
locationResult.gotLocation(gps_loc);
return;
}
if(net_loc!=null){
locationResult.gotLocation(net_loc);
return;
}
locationResult.gotLocation(null);
}
}
public static abstract class LocationResult{
public abstract void gotLocation(Location location);
}}
我在这里找到位置
MyLocation mLocation = new MyLocation(this);
mLocation.getLocation(this, new MyLocation.LocationResult() {
@Override
public void gotLocation(Location location) {
//Your Logic
}
});