18UI美化之level（等级显示显示）

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


<level-list xmlns:android&＃61;"http://schemas.android.com/apk/res/android" ><item android:drawable&＃61;"&＃64;drawable/wifi1"android:maxLevel &＃61; "10">item><item android:drawable&＃61;"&＃64;drawable/wifi2"android:maxLevel &＃61; "20">item><item android:drawable&＃61;"&＃64;drawable/wifi3"android:maxLevel &＃61; "30">item><item android:drawable&＃61;"&＃64;drawable/wifi4"android:maxLevel &＃61; "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;&＃64;Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.activity_level);iv &＃61; (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;}}
}