android 权限申请

/**
 * request Camera Permission
 * Created by long.yan on 2017/9/15.
 *
 * @author long.yan
 */

public class PermissionUtils {
    public static boolean hasCameraPermission(Activity activity) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            MELog.e("版本-->" + Build.VERSION.SDK_INT, "Android6.0以上");
            return ContextCompat.checkSelfPermission(activity, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED;
        } else {
            MELog.e("版本-->" + Build.VERSION.SDK_INT, "Android6.0以下");
            PackageManager packageManager = activity.getPackageManager();
            int permission = packageManager.checkPermission("android.permission.CAMERA", activity.getPackageName());
            MELog.i("hasCameraPermission->", "" + permission);
            if (PackageManager.PERMISSION_GRANTED == permission) {
                return true;
            } else {
                return false;
            }
        }
    }

    public static void reqCameraPermission(Activity activity) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            MELog.e("版本-->" + Build.VERSION.SDK_INT, "Android6.0以上");
            activity.requestPermissions(new String[]{Manifest.permission.CAMERA}, 0);
        } else {
            MELog.e("版本-->" + Build.VERSION.SDK_INT, "Android6.0以下");
            ActivityCompat.requestPermissions(activity, new String[]{Manifest.permission.CAMERA}, 0);
        }
    }

    /**
     * 返回true 表示可以使用 返回false表示不可以使用
     */
    public static boolean cameraIsCanUse() {
        boolean isCanUse = true;
        Camera mCamera = null;
        try {
            mCamera = Camera.open();
            Camera.Parameters mParameters = mCamera.getParameters();
            mCamera.setParameters(mParameters);
        } catch (Exception e) {
            isCanUse = false;
        }

        if (mCamera != null) {
            try {
                mCamera.release();
            } catch (Exception e) {
                e.printStackTrace();
                return isCanUse;
            }
        }
        return isCanUse;
    }
}