Android自定义按钮；改变文字颜色

Android自定义按钮：改变文字颜色

java
public class MyButton extends Button {
    private boolean isTextColored;
    public MyButton(Context context) {
        super(context);
        init();
    }
    public MyButton(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }
    public MyButton(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }
    private void init() {
        isTextColored = false;
    }
    public void setTextColored(boolean isTextColored) {
        this.isTextColored = isTextColored;
        invalidate();
    }
    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        if (isTextColored) {
            int textColor = getCurrentTextColor();
            Paint paint = getPaint();
            paint.setColor(textColor);
        }
    }
}

xml
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Custom Button"
    android:textColor="#FF0000" />

java
public class MainActivity extends AppCompatActivity {
    private MyButton myButton;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        myButton = findViewById(R.id.my_button);
        myButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                myButton.setTextColored(!myButton.isTextColored());
            }
        });
    }
}