Permissions
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The document discusses permissions in Android and how they have changed over time. It explains that before Android M, all permissions were granted at install time, but after M, there are normal permissions that are automatically granted and dangerous permissions that must be requested by the app at runtime. It provides examples of normal versus dangerous permissions and discusses how to check for and handle permission requests in code. It also discusses considerations for different device and app versions when dealing with permissions.
![Check the permission
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (this.checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) !=
PackageManager.PERMISSION_GRANTED) {
if (shouldShowRequestPermissionRationale(
Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
tvAlert.setText("Hey Man, I need this permission or I ..."); //Explain decently!
}
String[] reqPerms = {Manifest.permission.WRITE_EXTERNAL_STORAGE};
requestPermissions(reqPerms, REQ_CODE_EXT_STORAGE);
return;
}
}](https://image.slidesharecdn.com/f1ca617c-98ab-404d-8862-6fc037105cd7-151006184732-lva1-app6892/85/Permissions-11-320.jpg)
![Handle the Permission
@@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
if(requestCode == REQ_CODE_EXT_STORAGE){
if(grantResults[0] == PackageManager.PERMISSION_GRANTED){
//ToDo write to Disk
} else {
//ToDo Deal with the situation gracefully
}
}
}](https://image.slidesharecdn.com/f1ca617c-98ab-404d-8862-6fc037105cd7-151006184732-lva1-app6892/85/Permissions-12-320.jpg)
Permissions
- 1. Permissions in Android World A Selim Salman @a_selims
- 2. A Selim Salman Diversified Android Engineer @a_selims- Started Android since 2009 in MSc. - Lived the Diversity of technology. - Back officially to Android 3 years ago!
- 3. The Story Overview about Permissions M BorderLine Use the permissions effectively Nobody can hurt me without my permission. Mahatma Gandhi
- 4. What is a permission? A string that has power! Defined at: AndroidManifest.xml <uses-permission android:name="android.permission.INTERNET" />
- 5. Permissions <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.WRITE_CALENDAR" /> <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" /> <uses-permission android:name="android.permission.VIBRATE" /> <uses-permission android:name="android.permission.WAKE_LOCK" /> <uses-permission android:name="android.permission.GET_ACCOUNTS" />
- 6. Before M Permissions granted at Install Time. One shot: allow and install or disallow and forget the app!
- 7. After M: RunTime permissions Types of permissions: - normal granted - dangerous request Permission Groups: - e.g. CONTACT Simple, Empowering, Go The extra mile SDK 23+
- 8. Normal vs Dangerous android.permission.INTERNET android.permission.BLUETOOTH android.permission.KILL_BACKGROUND_PROCESSES android.permission.MODIFY_AUDIO_SETTINGS android.permission.NFC android.permission.READ_SYNC_SETTINGS android.permission.READ_SYNC_STATS ... android.permission-group.CALENDAR android.permission.READ_CALENDAR android.permission.WRITE_CALENDAR android.permission-group.CAMERA android.permission.CAMERA android.permission-group.CONTACTS android.permission.READ_CONTACTS android.permission.WRITE_CONTACTS android.permission.GET_ACCOUNTS android.permission-group.LOCATION android.permission.ACCESS_FINE_LOCATION android.permission.ACCESS_COARSE_LOCATION ...
- 10. Flow Define at Manifest Always Check, Request, (maybe) Inform
- 11. Check the permission if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { if (this.checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) { if (shouldShowRequestPermissionRationale( Manifest.permission.WRITE_EXTERNAL_STORAGE)) { tvAlert.setText("Hey Man, I need this permission or I ..."); //Explain decently! } String[] reqPerms = {Manifest.permission.WRITE_EXTERNAL_STORAGE}; requestPermissions(reqPerms, REQ_CODE_EXT_STORAGE); return; } }
- 12. Handle the Permission @@Override public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { if(requestCode == REQ_CODE_EXT_STORAGE){ if(grantResults[0] == PackageManager.PERMISSION_GRANTED){ //ToDo write to Disk } else { //ToDo Deal with the situation gracefully } } }
- 13. If not granted When the app attempts to perform an operation that requires that permission, the operation will not necessarily cause an exception. Instead, it might return an empty data set, signal an error, or otherwise exhibit unexpected behavior. For example, if you query a calendar without permission, the method returns an empty data set. http://developer.android.com/preview/features/runtime-permissions.html https://github.com/aselims/android-RuntimePermissions
- 14. Devices and Apps Pre-M device, pre-M app 1 shot Pre-M device, M app 1 shot M device, M app RT M device, pre-M app 1 shot but revoked handle M APIs: if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {}
- 15. Effective Permissions Remove the permissions you do not need, How?! - Google Play Services & 3rd party Libs permissions - Selectively compile the libs that you need. https://developers.google. com/android/guides/setup - Edit Libs from source. Use Intents! No control over UX
- 16. Show me the Code!
- 19. dependencies { compile 'com.google.android.gms:play-services:7.8.0' } //compile 'com.google.android.gms:play-services:7.5.0' compile 'com.google.android.gms:play-services-plus:7.5.0' compile 'com.google.android.gms:play-services-analytics:7.5.0' compile 'com.google.android.gms:play-services-gcm:7.5.0'
- 20. Static <service android:name=.MyService android:permission=com.hiqes. android.permission. MY_SERVICE_CLIENT /> Dynamic if (checkCallingOrSelfPermission (MyApp.permissions. MY_SERVICE_CLIENT) != PackageManager. PERMISSION_GRANTED)