//判断是否有相机权限
if (!ActivityCompat.shouldShowRequestPermissionRationale(this,Manifest.permission.CAMERA)){
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA},0);
}
//判断是否有相机权限
if (!ActivityCompat.shouldShowRequestPermissionRationale(this,Manifest.permission.CAMERA)){
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA},0);
}