import android.annotation.TargetApi;import android.app.Activity;import android.content.Context;import android.content.pm.PackageManager;import android.os.Build;import android.support.v4.content.ContextCompat;import java.util.ArrayList;import java.util.List;/** * DESC 6.0 权限工具类 * Created by douhaoqiang on 2017/2/27. */public class PermissionUtils {    private static final String TAG = "PermissionUtils";    private static int mRequestCode = -1;    private static OnPermissionListener mOnPermissionListener;    /**     * 权限请求回调     */    public interface OnPermissionListener {        //权限通过        void onPermissionGranted();        //权限拒绝        void onPermissionDenied();    }    /**     * 调用请求响应的权限     * @param context     上下文菜单 必须为Activity     * @param requestCode 请求码     * @param permissions 请求权限     * @param listener    权限请求监听     */    @TargetApi(Build.VERSION_CODES.M)    public static void requestPermissions(Context context, int requestCode            , String[] permissions, OnPermissionListener listener) {        if (context instanceof Activity) {            mOnPermissionListener = listener;            List
     
       deniedPermissions = getDeniedPermissions(context, permissions);            if (deniedPermissions.size() > 0) {                mRequestCode = requestCode;                ((Activity) context).requestPermissions(deniedPermissions                        .toArray(new String[deniedPermissions.size()]), requestCode);            } else {                if (mOnPermissionListener != null)                    mOnPermissionListener.onPermissionGranted();            }        } else {            throw new RuntimeException("Context must be an Activity");        }    }    /**     * 获取请求权限中需要授权的权限     */    private static List
      
        getDeniedPermissions(Context context, String... permissions) {        List
       
         deniedPermissions = new ArrayList<>();        for (String permission : permissions) {            if (ContextCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_DENIED) {                deniedPermissions.add(permission);            }        }        return deniedPermissions;    }    /**     * 请求权限结果，对应Activity中onRequestPermissionsResult()方法。     */    public static void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {        if (mRequestCode != -1 && requestCode == mRequestCode) {            if (mOnPermissionListener != null) {                if (verifyPermissions(grantResults)) {                    mOnPermissionListener.onPermissionGranted();                } else {                    mOnPermissionListener.onPermissionDenied();                }            }        }    }    /**     * 验证所有权限是否都已经授权     */    private static boolean verifyPermissions(int[] grantResults) {        for (int grantResult : grantResults) {            if (grantResult != PackageManager.PERMISSION_GRANTED) {                return false;            }        }        return true;    }}