Android Glide加载Gif

public class TestActivity extends AppCompatActivity {
    private ImageView gif;//gif;
    private Context context;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test);
        context = this;
        gif = findViewById(R.id.gif);
        Glide.with(context).load(R.drawable.lnpm).asGif().diskCacheStrategy(DiskCacheStrategy.SOURCE).into(gif);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        super.onKeyDown(keyCode, event);
        if (keyCode == KeyEvent.KEYCODE_BACK){
            finish();
        }
        return false;
    }