Android6.0之后对敏感权限进行了控制，即只有用户确认后才能够拥有权限，在AndroidManifest中声明还不够。
以下是在实际开发中写的关于权限确认的方法类。

package com.android.jierijt.tools;

import android.Manifest;
import android.app.Activity;
import android.content.Context;
import android.content.pm.PackageManager;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

public class Permission {
    private static final int MY_PERMISSIONS_REQUEST_CALL_PHONE = 1;
    private static final int MY_PERMISSIONS_REQUEST_CALL_CAMERA = 2;





    static String[] permissions = new String[]{
            Manifest.permission.CAMERA,
            Manifest.permission.WRITE_EXTERNAL_STORAGE,
            Manifest.permission.ACCESS_FINE_LOCATION
    };

    public static void  checkPermissionGroup(Activity  activity){
        List<String> mPermissionList=new ArrayList<>();
        for (int i = 0; i < permissions.length; i++) {
        if (ContextCompat.checkSelfPermission(activity, permissions[i]) != PackageManager.PERMISSION_GRANTED) {
            mPermissionList.add(permissions[i]);
        }
    }
                if (mPermissionList.isEmpty()) {//未授予的权限为空，表示都授予了
        Toast.makeText(activity,"已经授权", Toast.LENGTH_LONG).show();
    } else {//请求权限方法
        String[] permissions = mPermissionList.toArray(new String[mPermissionList.size()]);//将List转为数组
        ActivityCompat.requestPermissions(activity, permissions, MY_PERMISSIONS_REQUEST_CALL_CAMERA);

    }
    }
    public static void  checkPermission(Activity  activity,String tagPermission){
            if (ContextCompat.checkSelfPermission(activity, tagPermission) != PackageManager.PERMISSION_GRANTED) {
                //没有授予权限
                ActivityCompat.requestPermissions(activity, new String[]{tagPermission}, MY_PERMISSIONS_REQUEST_CALL_CAMERA);
            }


    }

}