@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btnShow = findViewById(R.id.btn_show);
        btnShow2 = findViewById(R.id.btn_show2);
        btnStart = findViewById(R.id.btn_start);
        btnStart2 = findViewById(R.id.btn_start2);
        container = findViewById(R.id.container);

        btnStart.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                container.slideLeft(3000);
            }
        });

        btnStart2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                container.slideRight(3000);
            }
        });
    }