Question

我的应用依赖于GPS信号，因此我要求应用启动时的用户启用GPS。但是，如果用户拒绝，应用程序将继续运行。

GPS对我的应用程序至关重要，因此如果用户拒绝，我想再次显示该对话框。如果不可能，只需在用户未授予许可的情况下关闭应用程序。

你能帮忙吗？

非常感谢。

 protected void createLocationRequest() {
    LocationRequest mLocationRequest = new LocationRequest();
    mLocationRequest.setInterval(1000);
    mLocationRequest.setFastestInterval(1000);
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

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

    SettingsClient client = LocationServices.getSettingsClient(this);
    Task<LocationSettingsResponse> task = client.checkLocationSettings(builder.build());

    task.addOnSuccessListener(this, new OnSuccessListener<LocationSettingsResponse>() {
        @Override
        public void onSuccess(LocationSettingsResponse locationSettingsResponse) {
            // All location settings are satisfied. The client can initialize
            // location requests here.
            // ...
        }
    });

    task.addOnFailureListener(this, new OnFailureListener() {
        @Override
        public void onFailure(@NonNull Exception e) {
            if (e 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) e;
                    resolvable.startResolutionForResult(MainActivity.this,
                            1);
                } catch (IntentSender.SendIntentException sendEx) {
                    // Ignore the error.
                }
            }
        }
    });
}

Answer 1

创建一个监听器，用于监听设备GPS上的模式更改，在您的应用程序库中实现监听器。然后相应地处理这些功能。如果GPS已启用，则应用程序将继续运行，否则会显示一个警告框，要求用户启用gps，因为所有ur活动都是从您的应用程序库扩展。

您可以查看答案here，了解如何确定GPS是否已启用。

您还可以查看本教程here，了解如何创建监听器。

Answer 2

解决方案是覆盖onActivityResult方法并使用匹配的requestCode处理它。

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // Check which request we're responding to
    if (requestCode == 6) {
        // Make sure the request was successful
        if (resultCode == RESULT_OK) {
            // The user picked a contact.
            // The Intent's data Uri identifies which contact was selected.

            // Do something with the contact here (bigger example below)
        }else{
            createLocationRequest();
        }
    }
}

Android强制启用GPS

2 个答案: