FcPermissions

FcPermissions is a library to simplify basic system permissions logic when targeting Android M or higher. Chinese README is here

##Show

Installation

You can install FcPermissions by adding the following dependency to your build.gradle:

 allprojects {
        repositories {
            jcenter()
            maven { url "https://jitpack.io" }
        }
   }

dependencies {
        compile 'com.github.lypeer:FcPermissions:v0.0.1'
   }

Usage

The library applies three way to request permissions : implementing an interface , extending an abstract class and creating a builder .

Implementing an interface

Firstly , let your Activity / Fragment implement FcPermissionsCallbacks interface . There are two methods in the interface :

• void onPermissionsGranted(int requestCode, List<String> perms) : when user grants the permissions we have requested , this method will be invoked . Perms is the list of granted permissions .
• void onPermissionsDenied(int requestCode, List<String> perms) : when user denies the permissions we have requested , this method will be invoked . Perms is the list of denied permissions .

What you should remember is that you should invoke FcPermissions.checkDeniedPermissionsNeverAskAgain() method in the onPermissionsDenied() to handler the solution user clicks "Never Ask Again" ( in the requesting dialog ) :

@Override
public void onPermissionsDenied(int requestCode, List<String> perms) {
    Toast.makeText(this, R.string.prompt_been_denied, Toast.LENGTH_LONG).show();
    FcPermissions.checkDeniedPermissionsNeverAskAgain(this,
            getString(R.string.prompt_we_need_camera),
            R.string.setting, R.string.cancel, null, perms);
}

Otherwise , you must override the onRequestPermissionsResult method and transport its parameters to FcPermissions.onRequestPermissionsResult() :

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    FcPermissions.onRequestPermissionsResult(requestCode , permissions , grantResults , this);
}

At last , when you want to request permissions , you can invoke the FcPermissions.requestPermissions() method . You can find the detail about this method in the source code .

A demo using this way to request permissions is MainActivity.java .

Extending an abstract class

FcPermissions provides three abstract classes :

• FcPermissionsActivity ：its parent is AppCompatActivity .
• FcPermissionsFragment : its parent is android.support.v4.app.fragment .
• FcPermissionsAppFragment : its parent is android.app.fragment .

You can choose a suitable class to extend . They are abstract class , so you must override some methods after extending them :

• void onPermissionsGranted(int requestCode, List<String> perms)：when user grants the permissions we have requested , this method will be invoked . Perms is the list of granted permissions .
• void onPermissionDenied(int requestCode, List<String> perms)：when user denies the permissions we have requested , this method will be invoked . Perms is the list of denied permissions .
• String getRationale4NeverAskAgain() ：The content of the dialog which shows after user click " Never Ask Again" . Returned value must be a legal String .

when you want to request permissions , you can invoke the requestPermissions() method ( NOTFcPermissions.requestPermissions() ) .

A demo using this way to request permissions is MainBaseActivity.java .

Creating a builder

The last but not least , creating a builder to request permissions . The basic class working for this way is FcPermissionB.java ( NOT FcPermissions.java above ) .

Firstly , just like what we do in the fist way , invoke the FcPermissionsB#checkDeniedPermissionsNeverAskAgain() method in the onPermissionsDenied() to handler the solution user clicks "Never Ask Again" ( in the requesting dialog ) :

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    mFcPermissionsB.onRequestPermissionsResult(requestCode , permissions , grantResults , this);
}

Then you can create a builder and begin to request permissions :

private void requestCameraPermission() {
    mFcPermissionsB = new FcPermissionsB.Builder(this)
            .onGrantedListener(new OnPermissionsGrantedListener() {
                @Override
                public void onPermissionsGranted(int requestCode, List<String> perms) {

                }
            })
            .onDeniedListener(new OnPermissionsDeniedListener() {
                @Override
                public void onPermissionsDenied(int requestCode, List<String> perms) {

                }
            })
            .positiveBtn4ReqPer(android.R.string.ok)
            .negativeBtn4ReqPer(R.string.cancel)
            .positiveBtn4NeverAskAgain(R.string.setting)
            .negativeBtn4NeverAskAgain(R.string.cancel)
            .rationale4ReqPer(getString(R.string.prompt_request_camara))//必需
            .rationale4NeverAskAgain(getString(R.string.prompt_we_need_camera))//必需
            .requestCode(RC_CAMERA)//必需
            .build();
    mFcPermissionsB.requestPermissions(Manifest.permission.CAMERA);//request permissions
}

There are three parameters must be added to builder :

• rationale4ReqPer() ：The content in the dialog asking whether to request permissions .
• rationale4NeverAskAgain() ：The content of the dialog which shows after user click " Never Ask Again" .
• requestCode() ：Request code of the request .

You can find other parameters's usage in the source code .

A demo using this way to request permissions is MainBuilderActivity.java .

Why this library ?

This library is an extension of easypermissions , but I change some code in it and create two other ways to make the work easier . So it may be a better choose for you to handler permissions .

##License

Copyright 2014-2016 lypeer.

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.