Android Permissions - Managing User Permissions in Android Development
Learn how to manage user permissions in Android development, including the categories of normal and dangerous permissions, obtaining permissions in old and new ways, requesting permissions at runtime, and checking permissions dynamically.
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Presentation Transcript
ANDROID PERMISSIONS Peter Larsson-Green J nk ping University Spring 2020
PERMISSIONS Some features are protected by permissions. Before we can use the feature, we need the user's permission to use it. Categories of permissions: Normal permissions Dangerous permissions Permissions are grouped. File System GPS Camera Bluetooth Internet
OBTAINING PERMISSION The old way: 1. List required permission in AndroidManifest.xml. 2. User grants the application these permission at installation time. User needs to grant permission to use optional features <manifest package="se.ju.larpet.myapplication" xmlns:android="http://schemas.android.com/apk/res/android"> <uses-permission android:name="the.permission" /> <uses-permission android:name="the.other.permission" /> <application android:label="My Cool App">...</application> </manifest>
OBTAINING PERMISSION The new way (Android 6, API level 23): 1. List required permission in AndroidManifest.xml. 2. User grants the application permissions at runtime. We developers need to write extra code to make this happen... We developers need to write extra code to handle the cases where we don't get the permissions... User only needs to grant permission for optional features if she uses them
OBTAINING PERMISSION AT RUNTIME aFragment anActivity.requestPermissions( new String[]{"permission1", "permission2"}, 123 ActivityCompat.requestPermissions( ); theActivity, new String[]{"permission1", "permission2"}, 123 ); @Override public void onRequestPermissionsResult( int requestCode, String permissions[], int[] grantResults ){ // ... PackageManager.PERMISSION_GRANTED PackageManager.PERMISSION_DENIED }
CHECKING PERMISSION AT RUNTIME int permStat = aContext.checkSelfPermission("the.permission"); if(permStat == PackageManager.PERMISSION_GRANTED){ // We already have the permission }else{ // We need to ask for the permission. } int permStat = ContextCompat.checkSelfPermission(aContext, "the.permission"); if(permStat == PackageManager.PERMISSION_GRANTED){ // We already have the permission }else{ // We need to ask for the permission. }
