My app needs to access the user's storage in near to every activity. How can I access the storage without making the app ask at every app startup for the permission to access it with the new Android M permission model? (Read and write)
Thanks!
If you do not want to prompt the user "on every app startup to give memory access to be able to do anything", then don't do that. Only call requestPermissions() if checkSelfPermission() returns PERMISSION_DENIED.
#Override
public void onCreate(Bundle icicle) {
if (checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)==
PackageManager.PERMISSION_GRANTED) {
init();
}
else {
requestPermissions(new String[] { Manifest.permission.WRITE_EXTERNAL_STORAGE },
REQUEST_STORAGE);
}
}
(native API Level 23 methods shown; you may want to use ContextCompat andActivityCompat` for backwards compatibility)
Or, only call requestPermissions() if the user does something positive in the UI that needs WRITE_EXTERNAL_STORAGE (e.g., clicks an action bar item) and you do not already have the permission.
Related
I am trying to request STORAGE Permission from the user at runtime after clicking a certain button. But somehow, this code (which is contained within a fragment's class) is not working at all no matter what I try.
binding.button.setOnClickListener {
requestPermissions(this.requireActivity(), "android.permission.WRITE_EXTERNAL_STORAGE", 392)
}
This piece of code isn't working either for both write and read permissions :
binding.button.setOnClickListener {
ActivityCompat.requestPermissions(this.requireActivity(), "android.permission.WRITE_EXTERNAL_STORAGE", 392)
}
No dialogue appears no matter what.
NOTE: I am testing on a physical device running on API 29.
NOTE2: I added the permission both WRITE and READ permissions to the manifest.
NOTE3: Performing any IO task crashes my app.
I looked up all over the internet but I still don't understand why it's not working.
As for your way for checking the permissions if it's inside a fragment maybe it's not correct , since these methods are deprecated and you may use another way which is the recommended one
Documentation for how to request permissions|android developers
which is the right way which goes as this:
Step 1 -You put this code as global in fragment/activity:
private final ActivityResultLauncher<String> requestPermissionLauncher =
registerForActivityResult(new ActivityResultContracts.RequestPermission(), isGranted -> {
if (isGranted) doSomething()
else
Toast.makeText(getContext(), "Can't continue without the required permissions", Toast.LENGTH_LONG).show();
});
Step 2- Then when you need to request for a permission you call launch on the object you declared as global , which is to be called in the OnCreate() function of the Fragment / Activity .So if you want to ask these permissions at the creation of the fragment / Activity then just place this code in OnCreate() or if are using a button to check permission then set the onClickListener for the same in onCreate() function:
public void getNecessaryPermissionsAnddoSomething() {
if (ActivityCompat.checkSelfPermission(getContext(),
Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
requestPermissionLauncher.launch(Manifest.permission.READ_EXTERNAL_STORAGE);
} else doSomething();
}
My app uses Internet access to display ads so I have the Internet permission declared in Manifest.
With latest Android releases, the user can disable this permission.
My problem is that if the user cancels this permission, the app is not able to load ads.
I know I can check if there is any current connection, in that case I will not try to load the app. But I want to know if the user has denied that permission in Android settings.
The idea is to prompt the user to enable it or the app will not run.
I add a screenshot of the Huawei Android Pie where the user can modify these settings
You just need to check first that whether the user enable (Allow the permission) or not. If not then redirect the user to the phone setting so that the user allow that permission otherwise just finish the app.
if (ContextCompat.checkSelfPermission(this,Manifest.permission.INTERNET) != PackageManager.PERMISSION_GRANTED )
{
if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.CAMERA)) {
// if user blocked permission
android.app.AlertDialog.Builder dlgAlert = new android.app.AlertDialog.Builder(this);
dlgAlert.setPositiveButton("Take me to app settings",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
Intent intent = new Intent(android.provider.Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
intent.setData(Uri.parse("package:" + getPackageName()));
startActivity(intent);
}
});
dlgAlert.setNegativeButton("Cancel",null);
dlgAlert.setCancelable(true);
dlgAlert.setIcon(R.drawable.appicon);
dlgAlert.setMessage("The app needs the permission please allow it other wise you cannot proceed.");
dlgAlert.setTitle("Oops!");
dlgAlert.create().show();
}
}
else
{
finish();
}
If internet connection is all you want to check, you dont have to check permissions for this because Internet is not a critical permission. What you can simply do is use ConnectivityManager class to check if the device has active internet connection or not and then write your logic accordingly.
Refer: This on how you can check for internet connectivity.
I have created an app which continuously run in background and show an floating overlay TextView(By using the permission android.permission.SYSTEM_ALERT_WINDOW).
I have problem in Lenovo android devices, when other applications try to request for user permission there is an alert dialog says "Screen Overlay Detected". While I have test the same application on Redmi 3S Prime device the "Allow" button in permission dialog is not clickable, until I have turned off the Floating Overlay TextView in my application.
So is there any solution to resolve this device specific issue? One of the possible solution may be disable floating TextView while permission dialog is visible to user and show floating overlay when permission dialog is closed, but the problem is how can I detect the permission dialog open/close state for other foreground application from my app.
Please suggest...
Unfortunately it seems that this is inherent to the Android OS, and as far as I know there is no way to detect when another app is requesting permissions. The general flow for interacting with other apps is to send intents to them in a push manner, so theoretically it could be done if the other apps send an intent to your app to disable the overlay, though this is not a practical solution.
I could be completely wrong, but I am yet to see a programmatic solution to this problem. The best you can probably do is warn your users that your app may cause this problem, and provide them with a quick temporary disable button.
how can I detect the permission dialog open/close state from my app??
Implement Method Mentioned Below, to run this check at the onCreate of the first Activity
public final static int PERM_REQUEST_CODE_DRAW_OVERLAYS = 1234;
/**
* Permission to draw Overlays/On Other Apps, related to
'android.permission.SYSTEM_ALERT_WINDOW'
in Manifest
Resolves issue of popup in Android M and above "Screen overlay detected- To change this permission setting you first have to turn off the screen overlay from Settings > Apps"
If app has not been granted permission to draw on the screen, create an Intent &
set its destination to
Settings.ACTION_MANAGE_OVERLAY_PERMISSION
&
* add a URI in the form of
"package:"
to send users directly to your app's page.
Note: Alternative Ignore URI to send user to the full list of apps.
public void permissionToDrawOverlays() {
if (android.os.Build.VERSION.SDK_INT >= 23) { //Android M Or Over
if (!Settings.canDrawOverlays(this)) {
Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION, Uri.parse("package:" + getPackageName()));
startActivityForResult(intent, PERM_REQUEST_CODE_DRAW_OVERLAYS);
}
}
}
Called on the activity, to check on the results returned of the user action within the settings
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == PERM_REQUEST_CODE_DRAW_OVERLAYS) {
if (android.os.Build.VERSION.SDK_INT >= 23) { //Android M Or Over
if (!Settings.canDrawOverlays(this)) {
// ADD UI FOR USER TO KNOW THAT UI for SYSTEM_ALERT_WINDOW permission was not granted earlier...
}
}
}
}
NOTE:Above code and extract is taken from following gist.
Hope this Helps!!!..
Just clear data of the Es explorer from device then after restart device.
I think these two links could help you.
firstlink
secondlink
Try to use for debug build -- targetSdkVersion 22.
After signed APK (for all targetSdkVersion(s)) application will work fine.
I found a lot of similar topics with the same threat but I still can't find a solution for my problem. I wrote this code to grant the writing permission to the app but there is no dialog box showing. I get in the monitor the No writing permission messages.
if(ContextCompat.checkSelfPermission(getContext(),Manifest.permission.WRITE_EXTERNAL_STORAGE)!= PackageManager.PERMISSION_GRANTED) {
Log.i("permissions", "No writing permission");
ActivityCompat.requestPermissions(getActivity(), new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 225);
I added the permission in the AndroidManifest fils
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
Changed the target sdk targetSdkVersion 23, and I am using android 6.0.1.
Edit:
I also tied this code but it still not working
requestPermissions(new String[]{android.Manifest.permission.WRITE_EXTERNAL_STORAGE}, 225);
I had a similiar case. Do not try to call it with ActivityCompat from a Fragment. Instead use the given requestPermissions method from the Fragment e.g.
requestPermissions(new String[]{android.Manifest.permission.WRITE_EXTERNAL_STORAGE}, 225);
RequestPermissions Dialog will not be shown only in below 2 cases on device >= 6.0:
1) Either you have already given permission to the any of the Dangerous Permissions within the Category you are asking for.
2) You had clicked Never Ask Again checkbox when the dialog had shown previously.
Is it possible to provide a custom text for the system dialog which is displayed when the user is asked to grant permission?
No, you can't customize the text of the dialog, but you can provide an explanation before request the permission. Quoting from developer.android.com:
Request Permissions
If your app needs a dangerous permission that was listed in the app
manifest, it must ask the user to grant the permission. Android
provides several methods you can use to request a permission. Calling
these methods brings up a standard Android dialog, which you cannot
customize.
Explain why the app needs permissions
In some circumstances, you might want to help the user understand why
your app needs a permission. For example, if a user launches a
photography app, the user probably won't be surprised that the app
asks for permission to use the camera, but the user might not
understand why the app wants access to the user's location or
contacts. Before you request a permission, you should consider
providing an explanation to the user. Keep in mind that you don't want
to overwhelm the user with explanations; if you provide too many
explanations, the user might find the app frustrating and remove it.
One approach you might use is to provide an explanation only if the
user has already turned down that permission request. If a user keeps
trying to use functionality that requires a permission, but keeps
turning down the permission request, that probably shows that the user
doesn't understand why the app needs the permission to provide that
functionality. In a situation like that, it's probably a good idea to
show an explanation.
To help find situations where the user might need an explanation,
Android provides a utiltity method,
shouldShowRequestPermissionRationale(). This method returns true if
the app has requested this permission previously and the user denied
the request.
We cannot customize request permission dialog but we can provide user a custom explanation that why we are requesting below is the method with custom explanation
private void checkForCameraPermission() {
// Here, thisActivity is the current activity
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.CAMERA)
!= PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.CAMERA)) {
AlertDialog.Builder alertBuilder = new AlertDialog.Builder(this);
alertBuilder.setCancelable(true);
alertBuilder.setTitle("Camera permission necessary");
alertBuilder.setMessage("FITsociety need camera permission to read barcode.");
alertBuilder.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
ActivityCompat.requestPermissions(BarCodeScannerActivity.this,
new String[]{Manifest.permission.CAMERA},
MY_PERMISSIONS_REQUEST_CAMERA);
}
});
AlertDialog alert = alertBuilder.create();
alert.show();
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.CAMERA},
MY_PERMISSIONS_REQUEST_CAMERA);
// MY_PERMISSIONS_REQUEST_CAMERA is an
// app-defined int constant. The callback method gets the
// result of the request.
}
} else {
setBarCodeScannerView();
}
}
the above method check whether permission is already granted if not then it check if custom explanation is required with this method
ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.CAMERA)
the documentation for this method is here shouldShowRequestPermissionRationale() this method return true only if user deny to permission dialog or user close the permission from the setting of the application if user did so then show alert dialog with custom explanation and proceed further hope it works