自定义View+自定义属性+回调

最新推荐文章于 2022-09-01 00:00:00 发布

A-Mm

最新推荐文章于 2022-09-01 00:00:00 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/weixin_43915066/article/details/89066196

本文介绍了一种自定义Android顶部栏View组件的方法，通过继承RelativeLayout并利用TypedArray获取自定义属性，实现了灵活配置顶部栏的背景、标题文本及其样式等功能。

<declare-styleable name="TopBar">
        <attr name="leftBackground" format="reference" />
        <attr name="rightBackground" format="reference" />
        <attr name="titleText" format="string" />
        <attr name="titleTextSize" format="dimension" />
        <attr name="titleTextColor" format="color" />
    </declare-styleable>

//自定义一属性和view

package com.bwei.newy;

import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RelativeLayout;


public class TopBar extends RelativeLayout {
    private Button leftButton, rightButton;
    private EditText titleTextView;
    private TypedArray typedArray;
    OnLeftAndRightClickListener listener;
    public TopBar(Context context) {
        super(context);
    }
    //设置监听器
    public void setOnLeftAndRightClickListener(OnLeftAndRightClickListener listener) {
        this.listener = listener;
    }

    //按钮点击接口
    public interface OnLeftAndRightClickListener {
        void OnLeftButtonClick();
        void OnRightButtonClick();
        void OnEditonClick();
    }
    //设置中间editx的可见性
    public void setEditButtonVisibility(boolean flag){
        if (flag)
            titleTextView.setVisibility(View.VISIBLE);
        else
            titleTextView.setVisibility(View.GONE);
    }
    //设置左边按钮的可见性
    public void setLeftButtonVisibility(boolean flag){
        if (flag)
            leftButton.setVisibility(View.VISIBLE);
        else
            leftButton.setVisibility(View.GONE);
    }
    //设置右边按钮的可见性
    public void setCenconTextViewVisibility(boolean flag){
        if (flag)
            titleTextView.setVisibility(View.VISIBLE);
        else
            titleTextView.setVisibility(View.GONE);
    }


    //设置右边按钮的可见性
    public void setRightButtonVisibility(boolean flag){
        if (flag)
            rightButton.setVisibility(View.VISIBLE);
        else
            rightButton.setVisibility(View.GONE);
    }

    public TopBar(Context context, AttributeSet attrs) {
        super(context, attrs);
        LayoutInflater.from(context).inflate(R.layout.layout_topbar, this);
        leftButton = (Button) findViewById(R.id.leftButton);
        rightButton = (Button) findViewById(R.id.rightButton);
        titleTextView = (EditText) findViewById(R.id.titleText);

        leftButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                if (listener != null) {
                    listener.OnLeftButtonClick();//点击回调
                }
            }
        });
        rightButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
               if (listener != null) {
                    listener.OnRightButtonClick();//点击回调
                }
            }
        });
        //获得自定义属性并赋值
        typedArray = context.obtainStyledAttributes(attrs, R.styleable.TopBar);
        int leftBtnBackground = typedArray.getResourceId(R.styleable.TopBar_leftBackground, 0);
        int rightBtnBackground = typedArray.getResourceId(R.styleable.TopBar_rightBackground, 0);
        String titleText = typedArray.getString(R.styleable.TopBar_titleText);
        float titleTextSize = typedArray.getDimension(R.styleable.TopBar_titleTextSize, 0);
        int titleTextColor = typedArray.getColor(R.styleable.TopBar_titleTextColor, 0x38ad5a);
        //释放资源
        typedArray.recycle();
        leftButton.setBackgroundResource(leftBtnBackground);
        rightButton.setBackgroundResource(rightBtnBackground);
        titleTextView.setHint(titleText);
        titleTextView.setTextSize(titleTextSize);
        titleTextView.setTextColor(titleTextColor);
    }

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

    public TopBar(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
    }



}

布局使用
<com.bwei.newy.TopBar
android:id="@+id/topbarr"
app:leftBackground="@drawable/bul_left"
app:rightBackground="@drawable/bul_right"
app:titleTextSize=“13sp”
app:titleText=“请输入搜索内容”
android:layout_width=“match_parent”
app:titleTextColor="@color/red"
android:layout_height=“120px”
/>

//调用使用
  bar.setOnLeftAndRightClickListener(new TopBar.OnLeftAndRightClickListener() {
            @Override
            public void OnLeftButtonClick() {