10

如果已关闭，是否可以以编程方式打开设备上的 LocationProviders（GPS 提供程序/网络提供程序）？

4

6 回答 6

26

不，不是，但您可以打开定位服务设置窗口：

context.startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS));
于 2012-01-24T08:21:47.740 回答
7

无需用户访问“设置”即可使用“高精度”或“省电”模式启用定位

https://android-developers.googleblog.com/2015/03/google-play-services-70-places-everyone.html

于 2015-05-16T09:10:26.020 回答
3 
private void turnGPSOn(){
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);
}
}

但此代码仅支持 APK 8。

于 2012-07-26T11:41:10.050 回答
1

是的，但您必须是超级用户 (sudo)，您的设备必须植根。

于 2012-11-21T06:32:27.217 回答
1

在最近的 Marshmallow 更新中，即使打开了位置设置，您的应用也需要明确请求许可。推荐的方法是显示应用程序的权限部分，用户可以在其中根据需要切换权限。执行此操作的代码片段如下：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
    
    if (this.checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
    
        final AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("Location Permission");
        builder.setMessage("The app needs location permissions. Please grant this permission to continue using the features of the app.");
        builder.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, PERMISSION_REQUEST_COARSE_LOCATION);
    
            }
        });
        builder.setNegativeButton(android.R.string.no, null);
        builder.show();
    }
} else {
    LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    boolean isGpsProviderEnabled, isNetworkProviderEnabled;
    isGpsProviderEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
    isNetworkProviderEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);

    if(!isGpsProviderEnabled && !isNetworkProviderEnabled) {
        final AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("Location Permission");
        builder.setMessage("The app needs location permissions. Please grant this permission to continue using the features of the app.");
        builder.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                startActivity(intent);
            }
        });
        builder.setNegativeButton(android.R.string.no, null);
        builder.show();
    }
}

并覆盖如下onRequestPermissionsResult方法：

@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
    switch (requestCode) {
        case PERMISSION_REQUEST_COARSE_LOCATION: {
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                Log.d(TAG, "coarse location permission granted");
            } else {
                Intent intent = new Intent();
                intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                Uri uri = Uri.fromParts("package", getPackageName(), null);
                intent.setData(uri);
                startActivity(intent);
            }
        }
    }
}

另一种方法是您也可以使用SettingsApi来查询启用了哪些位置提供程序。如果未启用，您可以提示对话框从应用程序内更改设置。

于 2017-07-11T07:04:44.913 回答
-1

使用以下代码启动 GPS

locationManager = ( LocationManager ) getSystemService ( Context.LOCATION_SERVICE );
locationListener = new LocationListener();
locationManager.requestLocationUpdates ( LocationManager.GPS_PROVIDER, 0, 0, locationListener );

和以下代码停止GPS

locationManager.removeUpdates( locationListener );

有关详细信息，请参阅LocationManager和LocationListener的文档。

于 2012-01-24T08:27:05.887 回答