Android 自定义View

public class JoTabLayout extends TabLayout {
    public JoTabLayout(@NonNull Context context) {
        super(context);
    }

    public JoTabLayout(@NonNull Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }

    public JoTabLayout(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }
}

这里讲一下 继承TabLayout 然后给TabLayout 添加自定义属性

我需要给JoTabLayout添加两个自定义的扩展属性

然后需要在class定义中获取

public class JoTabLayout extends TabLayout {
    public JoTabLayout(@NonNull Context context) {
        super(context);
    }

    public JoTabLayout(@NonNull Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        this.handleCustomAttrs(context, attrs);
    }

    public JoTabLayout(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        this.handleCustomAttrs(context, attrs);
    }


    private void handleCustomAttrs(@NonNull Context context, @Nullable AttributeSet attrs) {
        //获取自定义属性。
        TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.JoTabLayout);
        ta.getString(R.styleable.JoTabLayout_joTabSelectedTextAppearance);
        // 默认tab 自定义 属性
        String tabTextAppearance = ta.getString(R.styleable.JoTabLayout_joTabTextAppearance);
        System.out.println(tabTextAppearance);
      
        String tabSelectedTextAppearance = ta.getString(R.styleable.JoTabLayout_joTabSelectedTextAppearance);
        System.out.println(tabSelectedTextAppearance);

		、、、、、
		// 具体处理逻辑 根据情况处理
		、、、、、
        ta.recycle();
    }
}

不居中设置