Question

我正在研究与地图相关的Android应用程序，如果没有启用位置服务，我需要在客户端开发中检查位置访问是否启用显示对话框提示。

如何启用＆＃34;位置访问＆＃34;以编程方式在android？

Answer 1

使用以下代码进行检查。如果禁用，将生成对话框

public void statusCheck() {
    final LocationManager manager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

    if (!manager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
        buildAlertMessageNoGps();

    }
}

private void buildAlertMessageNoGps() {
    final AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setMessage("Your GPS seems to be disabled, do you want to enable it?")
            .setCancelable(false)
            .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                public void onClick(final DialogInterface dialog, final int id) {
                    startActivity(new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS));
                }
            })
            .setNegativeButton("No", new DialogInterface.OnClickListener() {
                public void onClick(final DialogInterface dialog, final int id) {
                    dialog.cancel();
                }
            });
    final AlertDialog alert = builder.create();
    alert.show();
}

Answer 2

您可以尝试以下方法：

检查是否已启用GPS和网络提供商：

public boolean canGetLocation() {
    boolean result = true;
    LocationManager lm;
    boolean gps_enabled = false;
    boolean network_enabled = false;
    if (lm == null)

        lm = (LocationManager) 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) {
    }
    if (gps_enabled == false || network_enabled == false) {
        result = false;
    } else {
        result = true;
    }

    return result;
}

警告对话框，如果上面的代码返回false：

public void showSettingsAlert() {
    AlertDialog.Builder alertDialog = new AlertDialog.Builder(this);

    // Setting Dialog Title
    alertDialog.setTitle("Error!");

    // Setting Dialog Message
    alertDialog.setMessage("Please ");

    // On pressing Settings button
    alertDialog.setPositiveButton(
            getResources().getString(R.string.button_ok),
            new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                    Intent intent = new Intent(
                            Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                startActivity(intent);
                }
            });

    alertDialog.show();
}

如何使用上述两种方法：

if (canGetLocation() == true) {

    //DO SOMETHING USEFUL HERE. ALL GPS PROVIDERS ARE CURRENTLY ENABLED                 
} else {

    //SHOW OUR SETTINGS ALERT, AND LET THE USE TURN ON ALL THE GPS PROVIDERS                                
    showSettingsAlert();

    }

Answer 3

只需签出以下帖子： How to check if Location Services are enabled? 它提供了一个很好的示例，说明如何检查位置服务是否已启用。

Answer 4

LocationServices.SettingsApi现已弃用，因此我们使用SettingsClient

See Answer

Answer 5

最近更新了Marshmallow，即使启用了“位置”设置，您的应用也需要明确要求获得许可。建议的方法是显示应用的“权限”部分，其中用户可以根据需要切换权限。执行此操作的代码段如下：

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onRequestPermissionsResult方法，如下所示：

@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来查询启用了哪个位置提供程序。如果未启用，则可以提示对话框从应用程序中更改设置。

Answer 6

这是一种以编程方式启用“地图”应用之类的位置的简单方法：

protected void enableLocationSettings() {
       LocationRequest locationRequest = LocationRequest.create()
             .setInterval(LOCATION_UPDATE_INTERVAL)
             .setFastestInterval(LOCATION_UPDATE_FASTEST_INTERVAL)
             .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

        LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
                .addLocationRequest(locationRequest);

        LocationServices
                .getSettingsClient(this)
                .checkLocationSettings(builder.build())
                .addOnSuccessListener(this, (LocationSettingsResponse response) -> {
                    // startUpdatingLocation(...);
                })
                .addOnFailureListener(this, ex -> {
                    if (ex instanceof ResolvableApiException) {
                        // Location settings are NOT satisfied,  but this can be fixed  by showing the user a dialog.
                        try {
                            // Show the dialog by calling startResolutionForResult(),  and check the result in onActivityResult().
                            ResolvableApiException resolvable = (ResolvableApiException) ex;
                            resolvable.startResolutionForResult(TrackingListActivity.this, REQUEST_CODE_CHECK_SETTINGS);
                        } catch (IntentSender.SendIntentException sendEx) {
                            // Ignore the error.
                        }
                    }
                });
 }

和onActivityResult：

@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    if (REQUEST_CODE_CHECK_SETTINGS == requestCode) {
        if(Activity.RESULT_OK == resultCode){
            //user clicked OK, you can startUpdatingLocation(...);

        }else{
            //user clicked cancel: informUserImportanceOfLocationAndPresentRequestAgain();
        }
    }
}

您可以在此处查看文档：{{3}}

Answer 7

在AndroidManifest.xml中添加以下内容：

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

比您的活动中添加以下内容：
并调用方法checkPermissionMaps（）

private void checkPermissionMaps() {
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
        Log.d(TAG, "checkMyPermissionMaps: Goto Execute OnMapReady");
    } else {
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION);
    }
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION) {
            if (permissions.length == 1 && permissions[0].equals(Manifest.permission.ACCESS_FINE_LOCATION) && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                    return;
                }
                //this call ur method u want load, exmp : zoomMyCuurentLocation();
            } else {
                finish(); // or call back checkPermissionMaps();
            }
        }
    }

如何在android中以编程方式启用位置访问？

7 个答案: