[英]Android device GPS on/off programmatically
I am using following code for GPS on/off. 我正在使用以下代码开启/关闭GPS。
//Enable GPS
Intent intent = new Intent("android.location.GPS_ENABLED_CHANGE");
intent.putExtra("enabled", true);
context.sendBroadcast(intent);
//Disable GPS
Intent intent = new Intent("android.location.GPS_ENABLED_CHANGE");
intent.putExtra("enabled", false);
context.sendBroadcast(intent);
Programmatically I need to on/off GPS on android device. 我可以通过编程方式在Android设备上开启/关闭GPS。 I am using above code for that.
我正在使用上面的代码。 But It doesn't work on all the devices.
但它并不适用于所有设备。
From my personal experience, I am answering this, 根据我的个人经验,我正在回答这个问题,
The hack code you shown in the your question has been stopped working from Android version 4.4. 您在问题中显示的黑客代码已从Android 4.4版停止运行。 Your will fire this Exception starting from Kitkat version
java.lang.SecurityException: Permission Denial: not allowed to send broadcast android.location.GPS_ENABLED_CHANGE
您将从Kitkat版本
java.lang.SecurityException: Permission Denial: not allowed to send broadcast android.location.GPS_ENABLED_CHANGE
开始触发此异常java.lang.SecurityException: Permission Denial: not allowed to send broadcast android.location.GPS_ENABLED_CHANGE
The First answer 's code will not work any more, it only display animated GPS icon in notification bar. 第一个答案的代码将不再起作用,它只在通知栏中显示动画GPS图标。
For The security purpose Google developer has block above both methods which were previously working fine. 出于安全目的,Google开发人员阻止了以前正常工作的两种方法。
Hence conclusion is that You can not programmatically start GPS On or Off. 因此,结论是您无法以编程方式启动或关闭GPS。
Try this code: 试试这段代码:
/** Method to turn on GPS **/
public void turnGPSOn(){
try
{
String provider = Settings.Secure.getString(getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
if(!provider.contains("gps")){ //if gps is disabled
final Intent poke = new Intent();
poke.setClassName("com.android.settings", "com.android.settings.widget.SettingsAppWidgetProvider");
poke.addCategory(Intent.CATEGORY_ALTERNATIVE);
poke.setData(Uri.parse("3"));
sendBroadcast(poke);
}
}
catch (Exception e) {
}
}
// Method to turn off the GPS
public void turnGPSOff(){
String provider = Settings.Secure.getString(getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
if(provider.contains("gps")){ //if gps is enabled
final Intent poke = new Intent();
poke.setClassName("com.android.settings", "com.android.settings.widget.SettingsAppWidgetProvider");
poke.addCategory(Intent.CATEGORY_ALTERNATIVE);
poke.setData(Uri.parse("3"));
sendBroadcast(poke);
}
}
// turning off the GPS if its in on state. to avoid the battery drain.
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
turnGPSOff();`enter code here`
}
/**
Also add this on your manifest:
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
UPDATE: 更新:
Now we can on/off GPS from our app using the default enable location dialog like Google maps. 现在,我们可以使用默认的启用位置对话框(如Google地图)从我们的应用开启/关闭GPS。
The documentation can be found here: 文档可以在这里找到:
Android Location Dialog Android位置对话框
Sample code: 示例代码:
if (googleApiClient == null) {
googleApiClient = new GoogleApiClient.Builder(getActivity())
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this).build();
googleApiClient.connect();
LocationRequest locationRequest = LocationRequest.create();
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
locationRequest.setInterval(30 * 1000);
locationRequest.setFastestInterval(5 * 1000);
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
.addLocationRequest(locationRequest);
//**************************
builder.setAlwaysShow(true); //this is the key ingredient
//**************************
PendingResult<LocationSettingsResult> result =
LocationServices.SettingsApi.checkLocationSettings(googleApiClient, builder.build());
result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
@Override
public void onResult(LocationSettingsResult result) {
final Status status = result.getStatus();
final LocationSettingsStates state = result.getLocationSettingsStates();
switch (status.getStatusCode()) {
case LocationSettingsStatusCodes.SUCCESS:
// All location settings are satisfied. The client can initialize location
// requests here.
break;
case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
// Location settings are not satisfied. But could be fixed by showing the user
// a dialog.
try {
// Show the dialog by calling startResolutionForResult(),
// and check the result in onActivityResult().
status.startResolutionForResult(
getActivity(), 1000);
} catch (IntentSender.SendIntentException e) {
// Ignore the error.
}
break;
case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
// Location settings are not satisfied. However, we have no way to fix the
// settings so we won't show the dialog.
break;
}
}
});
}
This code works on Rooted Phone 此代码适用于Rooted Phone
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
String[] cmds = {"cd /system/bin" ,"settings put secure location_providers_allowed +gps"};
try {
Process p = Runtime.getRuntime().exec("su");
DataOutputStream os = new DataOutputStream(p.getOutputStream());
for (String tmpCmd : cmds) {
os.writeBytes(tmpCmd + "\n");
}
os.writeBytes("exit\n");
os.flush();
}
catch (IOException e){
e.printStackTrace();
}
}
}
Use this for turning GPS ON and reverse the condition to put GPS OFF 用于打开GPS并反转条件以关闭GPS
Intent intent = new Intent("android.location.GPS_ENABLED_CHANGE");
intent.putExtra("enabled", true);
this.ctx.sendBroadcast(intent);
String provider = Settings.Secure.getString(ctx.getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
if(!provider.contains("gps")){ //if gps is disabled
final Intent poke = new Intent();
poke.setClassName("com.android.settings", "com.android.settings.widget.SettingsAppWidgetProvider");
poke.addCategory(Intent.CATEGORY_ALTERNATIVE);
poke.setData(Uri.parse("3"));
this.ctx.sendBroadcast(poke);
}
i will suggest you use following code for Android kitkat 4.4.x 我建议你使用Android kitkat 4.4.x的以下代码
public class GPSService extends Service implements LocationListener
{
// saving the context for later use
private final Context mContext;
// if GPS is enabled
boolean isGPSEnabled = false;
// if Netw`enter code here`ork is enabled
boolean isNetworkEnabled = false;
// if Location co-ordinates are available using GPS or Network
public boolean isLocationAvailable = false;
// Location and co-ordinates coordinates
Location mLocation;
double mLatitude;
double mLongitude;
// Minimum time fluctuation for next update (in milliseconds)
private static final long TIME = 30000;
// Minimum distance fluctuation for next update (in meters)
private static final long DISTANCE = 20;
// Declaring a Location Manager
protected LocationManager mLocationManager;
public GPSService(Context context) {
this.mContext = context;
mLocationManager = (LocationManager) mContext
.getSystemService(LOCATION_SERVICE);
}
/**
* Returs the Location
*
* @return Location or null if no location is found
*/
public Location getLocation() {
try {
// Getting GPS status
isGPSEnabled = mLocationManager
.isProviderEnabled(LocationManager.GPS_PROVIDER);
// If GPS enabled, get latitude/longitude using GPS Services
if (isGPSEnabled) {
mLocationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER, TIME, DISTANCE, this);
if (mLocationManager != null) {
mLocation = mLocationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (mLocation != null) {
mLatitude = mLocation.getLatitude();
mLongitude = mLocation.getLongitude();
isLocationAvailable = true; // setting a flag that
// location is available
return mLocation;
}
}
}
// If we are reaching this part, it means GPS was not able to fetch
// any location
// Getting network status
isNetworkEnabled = mLocationManager
.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (isNetworkEnabled) {
mLocationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER, TIME, DISTANCE, this);
if (mLocationManager != null) {
mLocation = mLocationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (mLocation != null) {
mLatitude = mLocation.getLatitude();
mLongitude = mLocation.getLongitude();
isLocationAvailable = true; // setting a flag that
// location is available
return mLocation;
}
}
}
// If reaching here means, we were not able to get location neither
// from GPS not Network,
if (!isGPSEnabled) {
// so asking user to open GPS
askUserToOpenGPS();
}
} catch (Exception e) {
e.printStackTrace();
}
// if reaching here means, location was not available, so setting the
// flag as false
isLocationAvailable = false;
return null;
}
/**
* Gives you complete address of the location
*
* @return complete address in String
*/
public String getLocationAddress() {
if (isLocationAvailable) {
Geocoder geocoder = new Geocoder(mContext, Locale.getDefault());
// Get the current location from the input parameter list
// Create a list to contain the result address
List<Address> addresses = null;
try {
/*
* Return 1 address.
*/
addresses = geocoder.getFromLocation(mLatitude, mLongitude, 1);
} catch (IOException e1) {
e1.printStackTrace();
return ("IO Exception trying to get address:" + e1);
} catch (IllegalArgumentException e2) {
// Error message to post in the log
String errorString = "Illegal arguments "
+ Double.toString(mLatitude) + " , "
+ Double.toString(mLongitude)
+ " passed to address service";
e2.printStackTrace();
return errorString;
}
// If the reverse geocode returned an address
if (addresses != null && addresses.size() > 0) {
// Get the first address
Address address = addresses.get(0);
/*
* Format the first line of address (if available), city, and
* country name.
*/
String addressText = String.format(
"%s, %s, %s",
// If there's a street address, add it
address.getMaxAddressLineIndex() > 0 ? address
.getAddressLine(0) : "",
// Locality is usually a city
address.getLocality(),
// The country of the address
address.getCountryName());
// Return the text
return addressText;
} else {
return "No address found by the service: Note to the developers, If no address is found by google itself, there is nothing you can do about it.";
}
} else {
return "Location Not available";
}
}
/**
* get latitude
*
* @return latitude in double
*/
public double getLatitude() {
if (mLocation != null) {
mLatitude = mLocation.getLatitude();
}
return mLatitude;
}
/**
* get longitude
*
* @return longitude in double
*/
public double getLongitude() {
if (mLocation != null) {
mLongitude = mLocation.getLongitude();
}
return mLongitude;
}
/**
* close GPS to save battery
*/
public void closeGPS() {
if (mLocationManager != null) {
mLocationManager.removeUpdates(GPSService.this);
}
}
/**
* show settings to open GPS
*/
public void askUserToOpenGPS() {
AlertDialog.Builder mAlertDialog = new AlertDialog.Builder(mContext);
// Setting Dialog Title
mAlertDialog.setTitle("Location not available, Open GPS?")
.setMessage("Activate GPS to use use location services?")
.setPositiveButton("Open Settings", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
mContext.startActivity(intent);
}
})
.setNegativeButton("Cancel",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
}).show();
}
/**
* Updating the location when location changes
*/
@Override
public void onLocationChanged(Location location) {
mLatitude = location.getLatitude();
mLongitude = location.getLongitude();
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public IBinder onBind(Intent arg0) {
return null;
}}
///////////////////////// /////////////////////////
public class MainActivity extends ActionBarActivity {
@Override
public class MainActivity extends ActionBarActivity {protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container,
false);
final TextView tvLocation = (TextView)rootView.findViewById(R.id.tvLocation);
final TextView tvAddress = (TextView)rootView.findViewById(R.id.tvAddress);
Button btnGetLocation = (Button)rootView.findViewById(R.id.btnGetLocation);
btnGetLocation.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String address = "";
GPSService mGPSService = new GPSService(getActivity());
mGPSService.getLocation();
if (mGPSService.isLocationAvailable == false) {
// Here you can ask the user to try again, using return; for that
Toast.makeText(getActivity(), "Your location is not available, please try again.", Toast.LENGTH_SHORT).show();
return;
// Or you can continue without getting the location, remove the return; above and uncomment the line given below
// address = "Location not available";
} else {
// Getting location co-ordinates
double latitude = mGPSService.getLatitude();
double longitude = mGPSService.getLongitude();
Toast.makeText(getActivity(), "Latitude:" + latitude + " | Longitude: " + longitude, Toast.LENGTH_LONG).show();
address = mGPSService.getLocationAddress();
tvLocation.setText("Latitude: " + latitude + " \nLongitude: " + longitude);
tvAddress.setText("Address: " + address);
}
Toast.makeText(getActivity(), "Your address is: " + address, Toast.LENGTH_SHORT).show();
// make sure you close the gps after using it. Save user's battery power
mGPSService.closeGPS();
}
});
return rootView;
}
}}
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