检查权限，给用户提示是否开启权限

public void CheckPermission(View view){
    if(SdkVersion()) {
        int hasPermission = this.checkSelfPermission(Manifest.permission.CAMERA);
        if (hasPermission != PackageManager.PERMISSION_GRANTED) {
            this.requestPermissions(new String[]{Manifest.permission.CAMERA}, 100);
        }
    }
}

public boolean SdkVersion(){
    return Build.VERSION.SDK_INT >= Build.VERSION_CODES.M;
}