Android Runtime Permissions in API-23 edit

Multiple Runtime Permissions From Same Permission Groups

In the manifest we have fours dangerous runtime permissions from two groups.

<!-- Required to read and write to shredPref file. -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

<!-- Required to get location of device. -->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

In the activity where the permissions are required. Note it is important to check for permissions in any activity that requires permissions, as the permissions can be revoked while the app is in the background and the app will then crash.

final private int REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS = 124;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.act_layout);
    
    // A simple check of whether runtime permissions need to be managed 
    if (Build.VERSION.SDK_INT >= 23) {
        checkMultiplePermissions();
    }

We only need to ask for permission for one of these from each group and all other permissions from this group are granted unless the permission is revoked by the user.

private void checkMultiplePermissions() {

 if (Build.VERSION.SDK_INT >= 23) {
     List<String> permissionsNeeded = new ArrayList<String>();
     List<String> permissionsList = new ArrayList<String>();
     
     if (!addPermission(permissionsList, android.Manifest.permission.ACCESS_FINE_LOCATION)) {
         permissionsNeeded.add("GPS");
     }

     if (!addPermission(permissionsList, android.Manifest.permission.READ_EXTERNAL_STORAGE)) {
         permissionsNeeded.add("Read Storage");
     }
     
     if (permissionsList.size() > 0) {
         requestPermissions(permissionsList.toArray(new String[permissionsList.size()]),
                 REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS);
         return;
     }
 }
}
private boolean addPermission(List<String> permissionsList, String permission) {
    if (Build.VERSION.SDK_INT >= 23)

        if (checkSelfPermission(permission) != PackageManager.PERMISSION_GRANTED) {
            permissionsList.add(permission);

            // Check for Rationale Option
            if (!shouldShowRequestPermissionRationale(permission))
                return false;
        }
    return true;
}

This deals with the result of the user allowing or not allowing permissions. In this example, if the permissions are not allowed, the app is killed.

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    switch (requestCode) {
        case REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS: {
        
            Map<String, Integer> perms = new HashMap<String, Integer>();
            // Initial
            perms.put(android.Manifest.permission.ACCESS_FINE_LOCATION, PackageManager.PERMISSION_GRANTED);
            perms.put(android.Manifest.permission.READ_EXTERNAL_STORAGE, PackageManager.PERMISSION_GRANTED);
            
            // Fill with results
            for (int i = 0; i < permissions.length; i++)
                perms.put(permissions[i], grantResults[i]);
            if (perms.get(android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED
                    && perms.get(android.Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
                // All Permissions Granted
                return;
            } else {
                // Permission Denied
                if (Build.VERSION.SDK_INT >= 23) {
                    Toast.makeText(
                            getApplicationContext(),
                            "My App cannot run without Location and Storage " +
                                    "Permissions.\nRelaunch My App or allow permissions" +
                                    " in Applications Settings",
                            Toast.LENGTH_LONG).show();
                    finish();
                }
            }
        }
        break;
        default:
            super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    }
}

More Information https://inthecheesefactory.com/blog/things-you-need-to-know-about-android-m-permission-developer-edition/en


Table Of Contents
39 ACRA
50 Runtime Permissions in API-23
64 Menu
112 Loader
119 Xposed
132 Colors
135 Fresco
140 AdMob
147 Button
156 Vk SDK
170 XMPP
176 OpenCV
200 FileIO
203 Moshi
217 Paint
231 AIDL
241 JCodec
243 Okio
255 Looper
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