如何在android应用中添加PNG键盘画面的打字效果？

// MainActivity.java
public class MainActivity extends AppCompatActivity implements View.OnKeyListener {
    private ImageView keyboardImageView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        keyboardImageView = findViewById(R.id.keyboard_image_view);
        keyboardImageView.setImageResource(R.drawable.keyboard_image);

        EditText editText = findViewById(R.id.edit_text);
        editText.setOnKeyListener(this);
    }

    @Override
    public boolean onKey(View v, int keyCode, KeyEvent event) {
        if (event.getAction() == KeyEvent.ACTION_DOWN) {
            // 处理键盘输入
            char pressedKey = (char) event.getUnicodeChar();
            // 在界面上显示输入的字符
            EditText editText = (EditText) v;
            editText.setText(editText.getText().toString() + pressedKey);
            return true;
        }
        return false;
    }
}