本篇文章已授權(quán)微信公眾號 hongyangAndroid （鴻洋）獨(dú)家發(fā)布
Android6.0權(quán)限機(jī)制（一）：介紹
Android6.0權(quán)限機(jī)制（二）：封裝
Android6.0權(quán)限機(jī)制（三）：6.0以前國產(chǎn)手機(jī)權(quán)限處理

前言

如果項(xiàng)目中用到危險(xiǎn)權(quán)限的操作很多于购，那一個(gè)個(gè)去檢查不是累死，當(dāng)然要封裝兼耀。

封裝權(quán)限機(jī)制的方法

由于申請權(quán)限的回調(diào)onRequestPermissionsResult是在Activity或者Fragment的方法悔常，只能用作回調(diào)我們沒辦法自己寫個(gè)工具類拿到這個(gè)回調(diào)珠插，那么參考郭霖的權(quán)限機(jī)制講解约啊，封裝方法有三種：

1. 自定義一個(gè)PermissionActivity，專門用于處理申請運(yùn)行時(shí)權(quán)限操作。該Activity背景透明拙徽，用戶無法察覺。執(zhí)行完后finish掉诗宣。
2. RxPermision 開源框架：https://github.com/tbruyelle/RxPermissions 膘怕，基本思路是透明的Fragment加入到當(dāng)前的Activity來處理回調(diào)，比上面的方法更巧妙召庞，但是這里必須使用RxJava
3. 封裝BaseActivity去實(shí)現(xiàn)運(yùn)行時(shí)權(quán)限申請方法岛心，然后所有Activity繼承BaseActivity，需要時(shí)調(diào)用方法即可篮灼。（推薦）下面采用這一種講解大概思路

封裝BaseActivity

1. 把權(quán)限檢測放在BaseActivity中忘古，以接口回調(diào)的形式通知檢測結(jié)果
2. 權(quán)限檢測不一定在Activity中，比如在Fragment甚至在某個(gè)工具類中穿稳，所以BaseActivity中檢測權(quán)限方法應(yīng)該是public static存皂，并且通過維護(hù)一個(gè)Activity棧來獲取頂層的Activity

BaseActivity：

/**
 * Created by carmelo on 17/3/19.
 */
public class BaseActivity extends Activity{
    private static OnPermissionCallback callback;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        BaseApplication.addActivity(this);
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        BaseApplication.removeActivity(this);
    }
    public static void requestPermission(String[] permissions, OnPermissionCallback onPermissionCallback){
        if(BaseApplication.getTopAcitivity()==null){
            return;
        }
        callback = onPermissionCallback;
        List<String> permissionsList = new ArrayList<>();
        for(String permission:permissions){
            if(ContextCompat.checkSelfPermission(BaseApplication.getTopAcitivity(),permission)!= PackageManager.PERMISSION_GRANTED){
                permissionsList.add(permission);
            }
        }
        if(!permissionsList.isEmpty()){
            ActivityCompat.requestPermissions(BaseApplication.getTopAcitivity(),permissionsList.toArray(new String[permissionsList.size()]),1);
        }else {
            if(callback!=null){
                callback.onGranted();
            }
        }
    }
    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if(grantResults.length>0){
            List<String> deniedPermissions = new ArrayList<>();
            for(int i=0;i<grantResults.length;i++){
                if(grantResults[i]!=PackageManager.PERMISSION_GRANTED){
                    deniedPermissions.add(permissions[i]);
                }
            }
            if(deniedPermissions.isEmpty()){
                if(callback!=null){
                    callback.onGranted();
                }
            }else{
                if(callback!=null){
                    callback.onDenied(deniedPermissions);
                }
            }
        }
    }
    public interface OnPermissionCallback{
        void onGranted();
        void onDenied(List<String> deniedPermissions);
    }
}

BaseApplication： 注意要在Manifest中注冊

public class BaseApplication extends Application {
    public static List<BaseActivity> activityList = new ArrayList<>();
    public static void addActivity(BaseActivity activity){
        activityList.add(activity);
    }
    public static void removeActivity(BaseActivity activity){
        activityList.remove(activity);
    }
    public static BaseActivity getTopAcitivity(){
        if(activityList.isEmpty()){
            return null;
        }
        return activityList.get(activityList.size()-1);
    }
    @Override
    public void onCreate() {
        super.onCreate();
    }
}