安卓开发-自定义布局的简单实例

package com.wanggjie.weishi.view;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.wanggjie.weishi.R;

/**
 * @author 王杰
 * @time 2017/2/12  10:08
 * @desc ${TODD}
 */
public class SetRelativeLa extends RelativeLayout {

    private RelativeLayout mRl_update;
    private TextView mMSett_name;
    private ImageView mMSett_off_on;
    private boolean flag;
    
    //重写父类的构造方法
    public SetRelativeLa(Context context) {
        this(context, null);
    }
    
    //重写父类的构造方法
    public SetRelativeLa(Context context, AttributeSet attrs) {
        super(context, attrs);
        //初始化UI
        initView(context);
        //加载数据
        initData(attrs);
    }

    public void initData(AttributeSet attrs) {
        //自定义的一个View-文本属性
        String mytext = attrs.getAttributeValue("http://schemas.android.com/apk/res-auto", "mytext");
        mMSett_name.setText(mytext);
        //自定义的一个View-背景属性
        String mybackgroud = attrs.getAttributeValue("http://schemas.android.com/apk/res-auto", "mybackgroud");
        switch (Integer.valueOf(mybackgroud)){
            case 0:
                mRl_update.setBackgroundResource(R.drawable.first_setting);
                break;
            case 1:
                mRl_update.setBackgroundResource(R.drawable.middle_setting);
                break;
            case 2:
                mRl_update.setBackgroundResource(R.drawable.last_setting);
                break;
        }

    }

    public void initView(Context context) {
        //通过打气筒把一个布局转换成一个View
        View view = View.inflate(context, R.layout.set_relalive_view, this);
        mRl_update = (RelativeLayout) view.findViewById(R.id.rl_sett_update);
        mMSett_name = (TextView) findViewById(R.id.tv_sett_name);
        mMSett_off_on = (ImageView) findViewById(R.id.iv_sett_off_on);
    }
    
    //设置点击按钮的时候,设置图片切换
    public void setToggleOn(boolean flag){
        this.flag= flag;
        if(flag) {
            mMSett_off_on.setImageResource(R.drawable.on);
        }else {
            mMSett_off_on.setImageResource(R.drawable.off);
        }
    }

}

另外的设置:

1,(在res中,创建一个raw文件,然后在该文件中实现以下代码:)

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="SetRelativeLa">
        <attr name="mytext" format="string"></attr>
        <attr name="mybackgroud">
            <enum name="first" value="0"></enum>
            <enum name="middle" value="1"></enum>
            <enum name="last" value="2"></enum>
        </attr>
    </declare-styleable>
</resources>

2,(在布局中引用已经设置好的自定义布局类,例子如下:)

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:haha="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    >

 <com.wanggjie.weishi.view.SetRelativeLa
        android:id="@+id/srl_set_update"
        android:layout_width="match_parent"
        android:layout_height="38dp"
        android:layout_marginTop="8dp"
        android:gravity="center"
        haha:mytext="开启自动更新"
        haha:mybackgroud="first"/>