Android – DataBinding 自定义setter

在APP中我们经常会遇到下面的UI


Android – DataBinding 自定义setter_第1张图片
图片来源于今日头条APP个人中心界面的截图

下面咱们进入主题正式介绍如何使用databinding来自定义setter。
先上效果图:

Android – DataBinding 自定义setter_第2张图片
databinding自定义setter

自定义View布局文件setting_view_layout .xml:




    

    

    

    

    


    



效果如下:

Android – DataBinding 自定义setter_第3张图片
图是在xml中截取的

自定义View代码:

public class SetterView extends ConstraintLayout {
    private ImageView mIvIcon;
    private TextView mTvTitle;
    private TextView mTvHint;
    private ImageView mIvArrow;
    private View mLine1;
    private View mLine2;

    public SetterView(Context context) {
        this(context, null);
    }

    public SetterView(Context context, AttributeSet attrs) {
        this(context, attrs,0);
    }

    public SetterView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initView(context);
    }

    private void initView(Context context){
        View view = LayoutInflater.from(context).inflate(R.layout.setting_view_layout, this);
        mIvIcon = (ImageView) view.findViewById(R.id.id_iv_icon);
        mTvTitle = (TextView) view.findViewById(R.id.id_tv_title);
        mTvHint = (TextView) view.findViewById(R.id.id_tv_hint);
        mIvArrow = (ImageView) view.findViewById(R.id.id_iv_arrow);
        mLine1 = view.findViewById(R.id.id_view_line1);
        mLine2 = view.findViewById(R.id.id_view_line2);
    }

    public void setIcon(Drawable resId){
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
            mIvIcon.setBackground(resId);
        }else{
            mIvIcon.setBackgroundDrawable(resId);
        }
    }

    public void setTitle(String title){
        mTvTitle.setText(title);
    }

    public void setHint(String hint){
        mTvHint.setText(hint);
    }

    public void setArrowVisible(Drawable resId){
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
            mIvArrow.setBackground(resId);
        }else{
            mIvArrow.setBackgroundDrawable(resId);
        }
    }


    /**
     * 有margin的line
     * @param colorId
     */
    public void setLine2Visible(int colorId){
        mLine1.setVisibility(View.GONE);
        mLine2.setBackgroundColor(colorId);
    }

    /**
     * match_parent的line
     * @param colorId
     */
    public void setLine1Visible(int colorId){
        mLine1.setBackgroundColor(colorId);
        mLine2.setVisibility(View.GONE);
    }
}

在Activity的activity_attr_setter_layout .xml中使用




    

    

    

        

        

        

        

        

    


activity中的代码:

public class AttributeSettersActivity extends AppCompatActivity {

    private AttrBind mAttrBind;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mAttrBind=DataBindingUtil.setContentView(this,R.layout.activity_attr_setter_layout);     
    }
}

app:setIcon="@{@drawable/phone}"

app:icon="@{@drawable/phone}"
是等价的。
如何使用根据自己的习惯来吧。

快乐生活!快乐工作!快乐编程!

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