Android错误之(Android 6.0)Unable to add window android.view.ViewRootImpl$W@d4521e8 -- permission denied

引入项目时已经加入了权限—>

但还是报错—
android6.0添加了运行时权限，因此在使用弹出框的地方加入如下代码：

    public void checkPermission() {
        if (Build.VERSION.SDK_INT >= 23) {
            if (!Settings.canDrawOverlays(MainActivity.this)) {
                Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION,
                        Uri.parse("package:" + getPackageName()));
                startActivityForResult(intent, 10);
            }
        }
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == 10) {
            if (Build.VERSION.SDK_INT >= 23) {
                if (!Settings.canDrawOverlays(this)) {
                    // SYSTEM_ALERT_WINDOW permission not granted...
                    Toast.makeText(MainActivity.this, "not granted", Toast.LENGTH_SHORT).show();
                }
            }
        }
    }

参考—>
http://blog.csdn.net/yayun0516/article/details/52206587