Android使用尺寸资源 dimens

1.在values文件夹下建立名为dimens.xml的文件，如下：

<?xml version="1.0" encoding="utf-8"?> <resources>         <string name="test_dimen">文本区域</string>     <string name="test_dimen1">按钮</string>       <dimen name="text_width">150px</dimen>     <dimen name="text_height">100px</dimen>     <dimen name="btn_width">30mm</dimen>     <dimen name="btn_height">10mm</dimen>     <color name="red_bg">#f00</color> </resources> 

2.在layout文件夹下建立名为test_dimens.xml的文件，如下：

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:orientation="vertical" >         <TextView         android:text="@string/test_dimen"         android:id="@+id/myDimenTextView01"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:width="@dimen/text_width"         android:height="@dimen/text_height"         android:background="@color/red_bg"             />     <Button       android:text="@string/test_dimen1"       android:id="@+id/Button01"      android:layout_width="wrap_content"      android:layout_height="wrap_content"      /> </LinearLayout> 

3.建立类：

package com.dim; import android.app.Activity; import android.os.Bundle; import android.widget.Button; import android.content.res.*; import com.dim.R; public class DimensionActivity extends Activity {     /** Called when the activity is first created. */ private Button btn;     @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         //设置当前Activity的布局                 setContentView(R.layout.test_dimens);         //获取Button实例         btn=(Button)findViewById(R.id.Button01);                 Resources r=getResources();               float btn_h =r.getDimension(R.dimen.btn_height);         float btn_w =r.getDimension(R.dimen.btn_width);                 btn.setHeight((int)btn_h);                 btn.setWidth((int)btn_w);                 //setContentView(R.layout.main);     } }