Source link: https://github.com/KingsMentor/Rationale

Rationale

Android permission Rationale Helper. Similar to WhatsApp Permission Rationale Dialog that manages permission request .

How it Works.

Init with a list of Permission called SmoothPermissions
Rationale runs a check on all SmoothPermissions to determine which Permission to show a message for
if the list is empty, it returns success with empty list
if there is any permission to be granted, it shows the appropraite rationale to the user
returns permissions to be requested for based on user interaction

Adding Rationale to your Project

Step 1 Add it in your root build.gradle at the end of repositories:

allprojects {

repositories {

 ...

 maven {
 url 'https://jitpack.io' 
}

}

  
}

Step 2 Add the dependency

dependencies {

 compile 'com.github.KingsMentor:Rationale:v1.0'
  
}

Using Rationale

Using in an Activity

private final int PERM = 2017;  final PermissionDetails smsPermissionDetails = new PermissionDetails().getPermissionDetails(this, Manifest.permission.READ_SMS, R.drawable.ic_sms_white_24dp);

Rationale.withActivity(this)

  .requestCode(PERM)

  .addSmoothPermission(new SmoothPermission(smsPermissionDetails))

  .includeStyle(R.style.Beliv_RationaleStyle).build(true);

Using in a Fragment*


  Rationale.withFragment(this)

  .requestCode(PERM)

  .addSmoothPermission(new SmoothPermission(smsPermissionDetails))

  .includeStyle(R.style.Beliv_RationaleStyle).build(true);

requestCode - request code to track response from onActivityResult
includeStyle - styling the Rationale Dialog. more details on styling is found below
SmoothPermissions - List of Permission to run Rationale Dialog on
build - takes true for Rationale Dialog to show Permission that has not been granted. false to only show rationale for permission permanently denied.

PermissionDetails

Build permission with :

Permission name
Permission Icon
rationaleMessage
deniedMessage - message to display when Permission is permanently denied by the user
description - System Permission Description
protectionLevel - Protection level of permission

Response from Rationale

Rationale returns response via onActivityResult. Here is a snippet on handling response from Rationale.

@Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {

if (Rationale.isResultFromRationale(requestCode, PERM)) {

 RationaleResponse rationaleResponse = Rationale.getRationaleResponse(data);

 if (rationaleResponse.shouldRequestForPermissions()) {

  // a list of permission to be requested for

  ArrayList<SmoothPermission> smoothPermissions = rationaleResponse.getSmoothPermissions();

// request for permissions

 
}
 else if (rationaleResponse.userDecline()) {

  Toast.makeText(this, "user does not want to do this now", Toast.LENGTH_LONG).show();

 
}
 else {

  Toast.makeText(this, "permission is accepted", Toast.LENGTH_LONG).show();

 
}

}

}

Styling Rationale

Rationale dialog can be placing this in styles.xml changing the values to suite your need and including it when initialising Rationale with includeStyle(styleRes)

 <style name="Beliv.RationaleStyle" parent="Theme.AppCompat">

<!-- Customize your theme here. -->

<item name="bv_primary">@color/primary_color</item>

<item name="bv_secondary">@color/secondary_color</item>

<item name="bv_rationale_state_visibility">true</item>

<item name="bv_rationale_state_ignore_color">@color/ignore_state</item>

<item name="bv_rationale_state_deny_color">@color/deny_state</item>

<item name="bv_rationale_text_color_deny">@color/grey</item>

<item name="bv_rationale_text_color_ignore">@color/ignore_state</item>

<item name="bv_card_corner_radius">@dimen/card_corner</item>

<item name="bv_rationale_text_size">@dimen/rationale_text_size</item>

<item name="bv_rationale_text_font">@string/rationale_font</item>

</style>