18 UI美化之level（等级显示显示）

来源：互联网发布：计算机控制系统的软件编辑：程序博客网时间：2024/06/03 18:15

根据level显示哪张图片
在工程文件的res/drawable/新建level-list
如下

<?xml version="1.0" encoding="utf-8"?><level-list xmlns:android="http://schemas.android.com/apk/res/android" >    <!-- 0-10 显示这张 -->    <item android:drawable="@drawable/wifi1"        android:maxLevel = "10"        ></item>      <!-- 20-30 之间显示 -->    <item android:drawable="@drawable/wifi2"        android:maxLevel = "20"        ></item>    <item android:drawable="@drawable/wifi3"        android:maxLevel = "30"        ></item>    <item android:drawable="@drawable/wifi4"        android:maxLevel = "40"        ></item></level-list>

使用

package com.qf.day18_uiresources_demo;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.ImageView;public class LevelActivity extends Activity {    private ImageView iv;    @Override    protected void onCreate(Bundle savedInstanceState) {        // TODO Auto-generated method stub        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_level);        iv = (ImageView) findViewById(R.id.imageView1);    }    public void clickButton(View v) {        switch (v.getId()) {        case R.id.button1:            iv.setImageLevel(10);            break;        case R.id.button2:            iv.setImageLevel(20);            break;        case R.id.button3:            iv.setImageLevel(30);            break;        case R.id.button4:            iv.setImageLevel(40);            break;        }    }}

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