RxPermissions
This library allows the usage of RxJava with the new Android M permission model.
Setup
To use this library your minSdkVersion must be >= 11.
In your build.gradle :
repositories {
jcenter() // If not already there
}
dependencies {
compile 'com.tbruyelle.rxpermissions:rxpermissions:0.9.4@aar'
}
Setup for RxJava2
Thanks to @vanniktech, RxPermissions now supports RxJava2, just change the package name to com.tbruyelle.rxpermissions2.
dependencies {
compile 'com.tbruyelle.rxpermissions2:rxpermissions:0.9.4@aar'
}
Migration to 0.9
Version 0.9 now uses a retained fragment to trigger the permission request from the framework. As a result, the RxPermissions class is no more a singleton. To migrate from 0.8 or earlier, just replace the following :
RxPermissions.getInstance(this) -> new RxPermissions(this) // where this is an Activity instanceUsage
Create a RxPermissions instance :
RxPermissions rxPermissions = new RxPermissions(this);
// where this is an Activity instanceExample : request the CAMERA permission (with Retrolambda for brevity, but not required)
// Must be done during an initialization phase like onCreate rxPermissions
.request(Manifest.permission.CAMERA)
.subscribe(granted -> {
if (granted) {
// Always true pre-M
// I can control the camera now
}
else {
// Oups permission denied
}
}
);
If you need to trigger the permission request from a specific event, you need to setup your event as an observable inside an initialization phase.
You can use JakeWharton/RxBinding to turn your view to an observable (not included in the library).
Example :
// Must be done during an initialization phase like onCreate RxView.clicks(findViewById(R.id.enableCamera))
.compose(rxPermissions.ensure(Manifest.permission.CAMERA))
.subscribe(granted -> {
// R.id.enableCamera has been clicked
}
);
If multiple permissions at the same time, the result is combined :
rxPermissions
.request(Manifest.permission.CAMERA,
Manifest.permission.READ_PHONE_STATE)
.subscribe(granted -> {
if (granted) {
// All requested permissions are granted
}
else {
// At least one permission is denied
}
}
);
You can also observe a detailed result with requestEach or ensureEach :
rxPermissions
.requestEach(Manifest.permission.CAMERA,
Manifest.permission.READ_PHONE_STATE)
.subscribe(permission -> {
// will emit 2 Permission objects
if (permission.granted) {
// `permission.name` is granted !
}
else if (permission.shouldShowRequestPermissionRationale) {
// Denied permission without ask never again
}
else {
// Denied permission with ask never again
// Need to go to the settings
}
}
);
Look at the sample app for more.
Important read
As mentioned above, because your app may be restarted during the permission request, the request must be done during an initialization phase. This may be Activity.onCreate, or View.onFinishInflate, but not pausing methods like onResume, because you'll potentially create an infinite request loop, as your requesting activity is paused by the framework during the permission request.
If not, and if your app is restarted during the permission request (because of a configuration change for instance), the user's answer will never be emitted to the subscriber.
You can find more details about that here.
Status
This library is still beta, so contributions are welcome. I'm currently using it in production since months without issue.
Benefits
-
Avoid worrying about the framework version. If the sdk is pre-M, the observer will automatically receive a granted result.
-
Prevents you to split your code between the permission request and the result handling. Currently without this library you have to request the permission in one place and handle the result in
Activity.onRequestPermissionsResult(). -
All what RX provides about transformation, filter, chaining...
License
Copyright (C) 2015 Thomas Bruyelle Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.