android自定义的RadioButton

最新推荐文章于 2025-06-23 16:54:05 发布

zhang106209

最新推荐文章于 2025-06-23 16:54:05 发布

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分类专栏：自定义的控件文章标签： android 自定义RadioButton 改变选中框与字体的距离设置选中框的位置

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本文介绍了一种自定义RadioButton的方法，允许调整选中框与文字之间的距离，并可设置选中框的位置。通过创建自定义组件RadioButtonDrawSize，实现了对RadioButton图片大小及位置的灵活控制。

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自定义的RadioButton：可以调节选中框与字体的距离，可以设置选中框的位置

效果如下：

一.在strings.xml里加入下列代码

<declare-styleable name="RadioButton_draw">
        <attr name="drawableSize" format="dimension" />
        <attr name="drawableTop" format="reference" />
        <attr name="drawableLeft" format="reference" />
        <attr name="drawableRight" format="reference" />
        <attr name="drawableBottom" format="reference" />
    </declare-styleable>

二、自定义的RadioButton

package com.example.customradiobutton;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.RadioButton;


/*
* 描述：RadioButton  图片大小
* 文件名：RadioButtonDrawSize.java7
*/
public class RadioButtonDrawSize extends RadioButton {

    private int mDrawableSize;// xml文件中设置的大小  

    public RadioButtonDrawSize(Context context) {
        this(context, null, 0);
    }

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

    public RadioButtonDrawSize(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        Drawable drawableLeft = null, drawableTop = null, drawableRight = null, drawableBottom = null;
        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.RadioButton_draw);

        int n = a.getIndexCount();
        for (int i = 0; i < n; i++) {
            int attr = a.getIndex(i);
            if (attr == R.styleable.RadioButton_draw_drawableSize) {
                mDrawableSize = a.getDimensionPixelSize(R.styleable.RadioButton_draw_drawableSize, 50);

            } else if (attr == R.styleable.RadioButton_draw_drawableTop) {
                drawableTop = a.getDrawable(attr);

            } else if (attr == R.styleable.RadioButton_draw_drawableBottom) {
                drawableRight = a.getDrawable(attr);

            } else if (attr == R.styleable.RadioButton_draw_drawableRight) {
                drawableBottom = a.getDrawable(attr);

            } else if (attr == R.styleable.RadioButton_draw_drawableLeft) {
                drawableLeft = a.getDrawable(attr);

            } else {
            }
        }
        a.recycle();
        setCompoundDrawablesWithIntrinsicBounds(drawableLeft, drawableTop, drawableRight, drawableBottom);
    }

    /**
     * RadioButton上、下、左、右设置图标
     */
    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top, Drawable right, Drawable bottom) {
        if (left != null) {
            left.setBounds(0, 0, mDrawableSize, mDrawableSize);
        }
        if (right != null) {
            right.setBounds(0, 0, mDrawableSize, mDrawableSize);
        }
        if (top != null) {
            top.setBounds(0, 0, mDrawableSize, mDrawableSize);
        }
        if (bottom != null) {
            bottom.setBounds(0, 0, mDrawableSize, mDrawableSize);
        }
        setCompoundDrawables(left, top, right, bottom);
    }
}

三、在activity_main.xml使用

<?xml version="1.0" encoding="utf-8"?>
<RadioGroup xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.customradiobutton.MainActivity">

    <com.example.customradiobutton.RadioButtonDrawSize
        android:id="@+id/radioButton"
        style="@style/inform_dialog_RadioButtonDrawSize"
        android:layout_margin="10dp"
        android:clickable="true"
        android:checked="true"
        android:text="自定义的button1"
        app:drawableLeft="@drawable/jubao_check"
        app:drawableSize="30dp" />
    <com.example.customradiobutton.RadioButtonDrawSize
        android:id="@+id/radioButton2"
        style="@style/inform_dialog_RadioButtonDrawSize"
        android:layout_margin="10dp"
        android:clickable="true"
        android:text="自定义的button2"
        app:drawableLeft="@drawable/jubao_check"
        app:drawableSize="30dp" />

    <com.example.customradiobutton.RadioButtonDrawSize
        android:id="@+id/radioButton3"
        style="@style/inform_dialog_RadioButtonDrawSize"
        android:layout_margin="10dp"
        android:text="自定义的button3"
        android:clickable="true"
        app:drawableLeft="@drawable/jubao_check"
        app:drawableSize="30dp" />

</RadioGroup>