![](/img/trans.png)
[英]Ask the user to enable GPS or network provider…illegalargumentexception provider==null
[英]How to ask user to enable GPS at the launch of application?
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);
}
}
看到 Logcat
04/20 17:35:26: Launching app
$ adb push F:\AndroidProject\Picker\app\build\outputs\apk\app-debug.apk /data/local/tmp/picker.novasyslabs.com.picker
$ adb shell pm install -r "/data/local/tmp/picker.novasyslabs.com.picker"
pkg: /data/local/tmp/picker.novasyslabs.com.picker
Success
$ adb shell am start -n "picker.novasyslabs.com.picker/picker.novasyslabs.com.picker.SlashScreen" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Connected to process 22502 on device sony-d2302-ZH80065A89
W/ResourceType: Found multiple library tables, ignoring...
W/ResourceType: Found multiple library tables, ignoring...
W/ResourceType: Found multiple library tables, ignoring...
W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
I/art: Background partial concurrent mark sweep GC freed 151(19KB) AllocSpace objects, 0(0B) LOS objects, 39% free, 13MB/22MB, paused 5.156ms total 20.919ms
D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
Process: picker.novasyslabs.com.picker, PID: 22502
java.lang.RuntimeException: Unable to start activity ComponentInfo{picker.novasyslabs.com.picker/picker.novasyslabs.com.picker.SlashScreen}: java.lang.ClassCastException: picker.novasyslabs.com.picker.SlashScreen cannot be cast to com.google.android.gms.common.api.GoogleApiClient$ConnectionCallbacks
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2379)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2442)
at android.app.ActivityThread.access$800(ActivityThread.java:156)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1351)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:211)
at android.app.ActivityThread.main(ActivityThread.java:5371)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:945)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:740)
Caused by: java.lang.ClassCastException: picker.novasyslabs.com.picker.SlashScreen cannot be cast to com.google.android.gms.common.api.GoogleApiClient$ConnectionCallbacks
at picker.novasyslabs.com.picker.SlashScreen.onCreate(SlashScreen.java:65)
at android.app.Activity.performCreate(Activity.java:5990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2332)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2442)
at android.app.ActivityThread.access$800(ActivityThread.java:156)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1351)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:211)
at android.app.ActivityThread.main(ActivityThread.java:5371)
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:945)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:740)
Application terminated.
我尝试了许多其他选项,如包管理器、位置管理器等,但无法做我想做的事。 我希望在启动应用程序时会提示用户启用 GPS。 我不希望用户进入设置。
而我想要的 API 级别 >=19。
请帮我解决我的问题.........谢谢
如果您想要如下图所示的内容,请继续操作。
在您的应用build.gradle
添加以下依赖build.gradle
implementation 'com.google.android.gms:play-services-location:16.0.0'
创建您想要的位置请求类型,我们希望 GPS 具有高精度
LocationRequest locationRequest = LocationRequest.create(); locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY); LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder() .addLocationRequest(locationRequest);
现在我们需要检查 GPS 的当前状态。 为此,我们必须使用LocationServices.getSettingsClient(getActivity()).checkLocationSettings(builder.build())
这将返回一个需要异步处理的Task
。 在 RESOLUTION_REQUIRED 情况下,我们要求用户授予权限,这是我们显示用户提示启用 GPS 的地方。
Task<LocationSettingsResponse> result = LocationServices.getSettingsClient(getActivity()).checkLocationSettings(builder.build()); result.addOnCompleteListener(new OnCompleteListener<LocationSettingsResponse>() { @Override public void onComplete(@NonNull Task<LocationSettingsResponse> task) { try { LocationSettingsResponse response = task.getResult(ApiException.class); // All location settings are satisfied. The client can initialize location // requests here. } catch (ApiException exception) { switch (exception.getStatusCode()) { case LocationSettingsStatusCodes.RESOLUTION_REQUIRED: // Location settings are not satisfied. But could be fixed by showing the // user a dialog. try { // Cast to a resolvable exception. ResolvableApiException resolvable = (ResolvableApiException) exception; // Show the dialog by calling startResolutionForResult(), // and check the result in onActivityResult(). resolvable.startResolutionForResult( getActivity(), LocationRequest.PRIORITY_HIGH_ACCURACY); } catch (IntentSender.SendIntentException e) { // Ignore the error. } catch (ClassCastException e) { // Ignore, should be an impossible 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; } } } });
现在我们已经要求用户打开 GPS,我们需要检查用户是否允许或忽略它。 为此,覆盖 onActivityResult。 请注意,如果您在片段中实现上述代码,结果将在封闭的 Activity 中收到。 所以在Activity类中覆盖onActivityResult。
@Override public void onActivityResult(int requestCode, int resultCode, Intent data) { switch (requestCode) { case LocationRequest.PRIORITY_HIGH_ACCURACY: switch (resultCode) { case Activity.RESULT_OK: // All required changes were successfully made Log.i(TAG, "onActivityResult: GPS Enabled by user"); break; case Activity.RESULT_CANCELED: // The user was asked to change settings, but chose not to Log.i(TAG, "onActivityResult: User rejected GPS request"); break; default: break; } break; } }
GoogleApiClient googleApiClient = new GoogleApiClient.Builder(context)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this).build();
googleApiClient.connect();
LocationRequest locationRequest = LocationRequest.create();
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
locationRequest.setInterval(5 * 1000);
locationRequest.setFastestInterval(2 * 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(@NonNull LocationSettingsResult result) {
final Status status = result.getStatus();
// final LocationSettingsStates state = result.getLocationSettingsStates();
switch (status.getStatusCode()) {
case LocationSettingsStatusCodes.SUCCESS:
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(
context, 1000);
} catch (IntentSender.SendIntentException e) {
// Ignore the error.
}
break;
case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
break;
}
}
});
这是@Ananth 答案的 kotlin 实现
private fun showLocationPrompt() {
val locationRequest = LocationRequest.create()
locationRequest.priority = LocationRequest.PRIORITY_HIGH_ACCURACY
val builder = LocationSettingsRequest.Builder().addLocationRequest(locationRequest)
val result: Task<LocationSettingsResponse> = LocationServices.getSettingsClient(activity).checkLocationSettings(builder.build())
result.addOnCompleteListener { task ->
try {
val response = task.getResult(ApiException::class.java)
// All location settings are satisfied. The client can initialize location
// requests here.
} catch (exception: ApiException) {
when (exception.statusCode) {
LocationSettingsStatusCodes.RESOLUTION_REQUIRED -> {
try {
// Cast to a resolvable exception.
val resolvable: ResolvableApiException = exception as ResolvableApiException
// Show the dialog by calling startResolutionForResult(),
// and check the result in onActivityResult().
resolvable.startResolutionForResult(
activity, LocationRequest.PRIORITY_HIGH_ACCURACY
)
} catch (e: IntentSender.SendIntentException) {
// Ignore the error.
} catch (e: ClassCastException) {
// Ignore, should be an impossible error.
}
}
LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE -> {
// Location settings are not satisfied. But could be fixed by showing the
// user a dialog.
// Location settings are not satisfied. However, we have no way to fix the
// settings so we won't show the dialog.
}
}
}
}
}
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data)
when (requestCode) {
LocationRequest.PRIORITY_HIGH_ACCURACY -> {
if (resultCode == Activity.RESULT_OK) {
Log.e("Status: ","On")
} else {
Log.e("Status: ","Off")
}
}
}
}
如果您不想强制用户进入设置页面以启用 GPS,请使用 SettingsApi。 这里是如何使用 SettingsApi SettingsApi的链接
如果你想像上面的链接一样请求许可,你可以参考我的回答: https : //stackoverflow.com/a/64757407/10618364
代码是使用GoogleApi和SettingsClient API 编写的,而不是使用已弃用的GoogleClientApi和SettingsApi编写的。
它也与 Android 11 兼容。;)
public void showSettingAlert()
{
AlertDialog.Builder alertDialog = new AlertDialog.Builder(context);
alertDialog.setTitle("GPS setting!");
alertDialog.setMessage("GPS is not enabled, Do you want to go to settings menu? ");
alertDialog.setPositiveButton("Setting", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
context.startActivity(intent);
}
});
alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
alertDialog.show();
}
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