安卓权限

java.lang.NoSuchMethodError: No static method checkSelfPermission(Landroid/content/Context;Ljava/lang/String;)I in class Landroid/support/v4/app/ActivityCompat;


checkSelfPermission这个方法added in [version 22.0.0](https://developer.android.google.cn/topic/libraries/support-library/revisions.html)

所以supportV4要改为22.0.0