PermissionX is an extension Android library that makes Android runtime permission request extremely easy. You can use it for basic permission request occasions or handle more complex conditions, like showing rationale dialog or go to app settings for allowance manually.
Edit your build.gradle file and add below dependency.
dependencies {
implementation 'com.permissionx.guolindev:permissionx:1.4.0'
}That's all. Now you are ready to go.
Use PermissionX to request Android runtime permissions is extremely simple.
For example. If you want to request READ_CONTACTS, CAMERA and CALL_PHONE permissions, declared them in the AndroidManifest.xml first.
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.permissionx.app">
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.CALL_PHONE" />
</manifest>Then you can use below codes to request.
PermissionX.init(activity)
.permissions(Manifest.permission.READ_CONTACTS, Manifest.permission.CAMERA, Manifest.permission.CALL_PHONE)
.request { allGranted, grantedList, deniedList ->
if (allGranted) {
Toast.makeText(this, "All permissions are granted", Toast.LENGTH_LONG).show()
} else {
Toast.makeText(this, "These permissions are denied: $deniedList", Toast.LENGTH_LONG).show()
}
}Pass any instance of FragmentActivity into init method, and specify the permissions that you want to request in the permissions method, then call request method for actual request.
The request result will be callback in the request lambda. allGranted means if all permissions that you requested are granted by user, maybe true or false. grantedList holds all granted permissions and deniedList holds all denied permissions.
Now you can write your own logic in the request lambda to handle the specific cases of your app.
As you know, Android provide shouldShowRequestPermissionRationale method to indicate us if we should show a rationale dialog to explain to user why we need this permission. Otherwise user may deny the permissions we requested and checked never ask again option.
To simplify this process, PermissionX provide onExplainRequestReason method. Chain this method before request method, If user deny one of the permissions, onExplainRequestReason method will get callback first. Then you can call showRequestReasonDialog method to explain to user why these permissions are necessary like below.
PermissionX.init(activity)
.permissions(Manifest.permission.READ_CONTACTS, Manifest.permission.CAMERA, Manifest.permission.CALL_PHONE)
.onExplainRequestReason { scope, deniedList ->
scope.showRequestReasonDialog(deniedList, "Core fundamental are based on these permissions", "OK", "Cancel")
}
.request { allGranted, grantedList, deniedList ->
if (allGranted) {
Toast.makeText(this, "All permissions are granted", Toast.LENGTH_LONG).show()
} else {
Toast.makeText(this, "These permissions are denied: $deniedList", Toast.LENGTH_LONG).show()
}
}showRequestReasonDialog method will prompt a rationale dialog with the information that second parameter provide. If user click positive button which shows text as third parameter provide, PermissionX will request again with the permissions that first parameter provide.
The fourth parameter as text for negative button is optional. If the denied permissions are necessary, you can ignore the fourth parameter and the dialog will be uncancelable. Which means user must allow these permissions for further usage.
Of course, user still may deny some permissions and checked never ask again option. In this case, each time we request these permissions again will be denied automatically. The only thing we could do is prompt to users they need to allow these permissions manually in app settings for continuation usage. But PermissionX did better.
PermissionX provide onForwardToSettings method for handling this occasion. Chain this method before request method, If some permissions are "denied and never ask again" by user, onForwardToSettings method will get callback. Then you can call showForwardToSettingsDialog method like below.
PermissionX.init(activity)
.permissions(Manifest.permission.READ_CONTACTS, Manifest.permission.CAMERA, Manifest.permission.CALL_PHONE)
.onExplainRequestReason { scope, deniedList ->
scope.showRequestReasonDialog(deniedList, "Core fundamental are based on these permissions", "OK", "Cancel")
}
.onForwardToSettings { scope, deniedList ->
scope.showForwardToSettingsDialog(deniedList, "You need to allow necessary permissions in Settings manually", "OK", "Cancel")
}
.request { allGranted, grantedList, deniedList ->
if (allGranted) {
Toast.makeText(this, "All permissions are granted", Toast.LENGTH_LONG).show()
} else {
Toast.makeText(this, "These permissions are denied: $deniedList", Toast.LENGTH_LONG).show()
}
}The parameters in showRequestReasonDialog method are similar with showRequestReasonDialog method. When user click positive button, PermissionX will forward to the settings page of your app and user can turn on the necessary permissions very quickly. When user switch back to app, PermissionX will request the necessary permissions again automatically.
It is always a good manner to show the rationale dialog and explain to users why you need these permissions before you actually request them.
To do that with PermissionX is quite simple. Just use explainReasonBeforeRequest method like below.
PermissionX.init(activity)
.permissions(Manifest.permission.READ_CONTACTS, Manifest.permission.CAMERA, Manifest.permission.CALL_PHONE)
.explainReasonBeforeRequest()
...Now everything works like charm.
The rationale dialog provided by PermissionsX support Android dark theme automatically. If you change your device into dark theme, everything just works great.
If your app is still not ready for AndroidX, you need to use Permission-Support library instead. The API of Permission-Support library is completely same as PermissionX, except declare another dependency in your build.gradle file.
dependencies {
implementation 'com.permissionx.guolindev:permission-support:1.4.0'
}This library won't be long term supported, and could be deprecated at any time. So try to switch to AndroidX as soon as you can.
Copyright (C) guolin, PermissionX Open Source Project
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.