android 动态权限申请 rxjava2实现方法

     由于自 2018 年下半年起，google play强制新推出的应用和应用更新将需要使用新近的 API 级别。所以使用targetSdkVersion 22作为解决方案不在可行。

        手动实现动态权限申请则需申请处代码和结果处理处代码不能处于同一代码块导致代码阅读和处理不便，看到有rxjava的实现方案。其原理是在需申请的权限的activity通过添加一个透明的fragment来处理权限申请的结果并回调到申请处。

需申请权限：（一组有一个申请成功即可）

group:android.permission-group.CONTACTS
    permission:android.permission.WRITE_CONTACTS
    permission:android.permission.GET_ACCOUNTS    
    permission:android.permission.READ_CONTACTS
  
  group:android.permission-group.PHONE
    permission:android.permission.READ_CALL_LOG
    permission:android.permission.READ_PHONE_STATE 
    permission:android.permission.CALL_PHONE
    permission:android.permission.WRITE_CALL_LOG
    permission:android.permission.USE_SIP
    permission:android.permission.PROCESS_OUTGOING_CALLS
    permission:com.android.voicemail.permission.ADD_VOICEMAIL
  
  group:android.permission-group.CALENDAR
    permission:android.permission.READ_CALENDAR
    permission:android.permission.WRITE_CALENDAR
  
  group:android.permission-group.CAMERA
    permission:android.permission.CAMERA
  
  group:android.permission-group.SENSORS
    permission:android.permission.BODY_SENSORS
  
  group:android.permission-group.LOCATION
    permission:android.permission.ACCESS_FINE_LOCATION
    permission:android.permission.ACCESS_COARSE_LOCATION
  
  group:android.permission-group.STORAGE
    permission:android.permission.READ_EXTERNAL_STORAGE
    permission:android.permission.WRITE_EXTERNAL_STORAGE
  
  group:android.permission-group.MICROPHONE
    permission:android.permission.RECORD_AUDIO
  
  group:android.permission-group.SMS
    permission:android.permission.READ_SMS
    permission:android.permission.RECEIVE_WAP_PUSH
    permission:android.permission.RECEIVE_MMS
    permission:android.permission.RECEIVE_SMS
    permission:android.permission.SEND_SMS

    permission:android.permission.READ_CELL_BROADCASTS

普通权限：（无需申请）

  android.permission.ACCESS_LOCATION_EXTRA_COMMANDS
  android.permission.ACCESS_NETWORK_STATE
  android.permission.ACCESS_NOTIFICATION_POLICY
  android.permission.ACCESS_WIFI_STATE
  android.permission.ACCESS_WIMAX_STATE
  android.permission.BLUETOOTH
  android.permission.BLUETOOTH_ADMIN
  android.permission.BROADCAST_STICKY
  android.permission.CHANGE_NETWORK_STATE
  android.permission.CHANGE_WIFI_MULTICAST_STATE
  android.permission.CHANGE_WIFI_STATE
  android.permission.CHANGE_WIMAX_STATE
  android.permission.DISABLE_KEYGUARD
  android.permission.EXPAND_STATUS_BAR
  android.permission.FLASHLIGHT
  android.permission.GET_ACCOUNTS
  android.permission.GET_PACKAGE_SIZE
  android.permission.INTERNET
  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.RECEIVE_BOOT_COMPLETED
  android.permission.REORDER_TASKS
  android.permission.REQUEST_INSTALL_PACKAGES
  android.permission.SET_TIME_ZONE
  android.permission.SET_WALLPAPER
  android.permission.SET_WALLPAPER_HINTS
  android.permission.SUBSCRIBED_FEEDS_READ
  android.permission.TRANSMIT_IR
  android.permission.USE_FINGERPRINT
  android.permission.VIBRATE
  android.permission.WAKE_LOCK
  android.permission.WRITE_SYNC_SETTINGS
  com.android.alarm.permission.SET_ALARM
  com.android.launcher.permission.INSTALL_SHORTCUT
  com.android.launcher.permission.UNINSTALL_SHORTCUT

   集成方法：

            

compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
compile 'io.reactivex.rxjava2:rxjava:2.0.5'
compile 'com.tbruyelle.rxpermissions2:rxpermissions:0.9.3@aar'

   使用方法：

    

private void requestPermissions() {
   RxPermissions rxPermission = new RxPermissions(testPermissionActivity.this);
   rxPermission
         .requestEach(Manifest.permission.ACCESS_FINE_LOCATION,
               Manifest.permission.WRITE_EXTERNAL_STORAGE,
               Manifest.permission.READ_CALENDAR,
               Manifest.permission.READ_CALL_LOG,
               Manifest.permission.READ_CONTACTS,
               Manifest.permission.READ_PHONE_STATE,
               Manifest.permission.READ_SMS,
               Manifest.permission.RECORD_AUDIO,
               Manifest.permission.CAMERA,
               Manifest.permission.CALL_PHONE,
               Manifest.permission.SEND_SMS)
         .subscribe(new Consumer<Permission>() {
            @Override
            public void accept(Permission permission) throws Exception {
               if (permission.granted) {
                  // 用户已经同意该权限
                  Log.d(TAG, permission.name + " is granted.");
               } else if (permission.shouldShowRequestPermissionRationale) {
                  // 用户拒绝了该权限，没有选中『不再询问』（Never ask again）,那么下次再次启动时，还会提示请求权限的对话框
                  Log.d(TAG, permission.name + " is denied. More info should be provided.");
               } else {
                  // 用户拒绝了该权限，并且选中『不再询问』
                  Log.d(TAG, permission.name + " is denied.");
               }
            }
         });
}