Android相机权限检测兼容问题

来源：互联网发布：诺基亚java游戏接水管编辑：程序博客网时间：2024/05/17 06:08

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http://blog.csdn.net/aa464971/article/details/60587764
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源码
https://github.com/dengyuhan/CameraPermissionCompat

6.0以后出了权限管理，而V4提供了一个权限检测的方法ContextCompat.checkSelfPermission

我在开发过程中遇到一个很诡异的问题：
有部分机型，当相机权限被禁用的时候，checkSelfPermission返回的boolean仍然为true，再打开相机就会报错。

后来换一个思路可以兼容，通过捕捉异常来检测权限

import android.Manifest;import android.app.Activity;import android.content.Context;import android.hardware.Camera;import android.os.Build;import android.support.annotation.NonNull;import android.support.v4.app.ActivityCompat;import android.support.v4.content.ContextCompat;import android.support.v4.content.PermissionChecker;/** * 摄像头权限检测 * author  dengyuhan * created 2017/3/6 18:08 */public class CameraPermissionCompat {    private static final int REQUEST_CODE_CAMERA = 999;    private static OnCameraPermissionListener mOnCameraPermissionListener;    /**     * 检测摄像头权限 没有就会申请     * @param context     * @param listener 申请权限的结果回调     * @return     */    public static boolean checkCameraPermission(Context context, OnCameraPermissionListener listener) {        mOnCameraPermissionListener = listener;        boolean granted = true;        //魅族或者6.0以下        if (isFlyme() || Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {            Camera mCamera = null;            try {                mCamera = Camera.open();                // setParameters 是针对魅族MX5 做的。MX5 通过Camera.open() 拿到的Camera                // 对象不为null                Camera.Parameters mParameters = mCamera.getParameters();                mCamera.setParameters(mParameters);            } catch (Exception e) {                granted = false;            }            if (mCamera != null) {                mCamera.release();            }        } else {            granted = ContextCompat.checkSelfPermission(context, Manifest.permission.CAMERA) == PermissionChecker.PERMISSION_GRANTED;        }        if (granted) {            if (mOnCameraPermissionListener != null) {                mOnCameraPermissionListener.onGrantResult(true);            }        } else {            if (context instanceof Activity) {                ActivityCompat.requestPermissions((Activity) context, new String[]{Manifest.permission.CAMERA}, REQUEST_CODE_CAMERA);            }        }        return granted;    }    public static void onRequestPermissionsResult(Context context, int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {        if (requestCode == REQUEST_CODE_CAMERA) {            if (mOnCameraPermissionListener != null) {                mOnCameraPermissionListener.onGrantResult(checkCameraPermission(context,null));            }        }    }    private static boolean isFlyme() {        if (Build.BRAND.contains("Meizu")) {            return true;        } else {            return false;        }    }    public interface OnCameraPermissionListener {        void onGrantResult(boolean granted);    }}

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