使用字符串、颜色、尺寸资源

字符串资源、颜色资源、尺寸资源，它们对应的 XML 文件都将位于/res/values 目录下， 它们默认的文件名，以及在 R 类中对应的内部类如下所示：



不过其中的默认文件名称是可以修改的。
示例代码如下：
main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center_horizontal"
>
<!-- 使用字符串资源，尺度资源 -->
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/app_name"
android:gravity="center"
android:textSize="@dimen/title_font_size"
/>
<!-- 定义一个GridView组件，使用尺度资源中定义的长度来指定水平间距、垂直间距 -->
<GridView
android:id="@+id/grid01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:horizontalSpacing="@dimen/spacing"
android:verticalSpacing="@dimen/spacing"
android:numColumns="3"
android:gravity="center">
</GridView>
</LinearLayout>

资源文件的名称是可以修改，当然也可以定义多个相同类型的资源文件，但注意所有的资源文件都是以<resources>为根目录的，至于里面的类型则为对应的color,demen,integer,string,boolean等，这些标签是不能更改的，编译器根据这些来生成R.java中的类。
color3.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="c1">#F00</color>
<color name="c2">#0F0</color>
<color name="c3">#00F</color>
<color name="c4">#0FF</color>
<color name="c5">#F0F</color>
<color name="c6">#FF0</color>
<color name="c7">#07F</color>
<color name="c8">#70F</color>
<color name="c9">#F70</color>
</resources>

dimens.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
<dimen name="spacing">8dp</dimen>
<!-- 定义GridView组件中每个单元格的宽度、高度 -->
<dimen name="cell_width">60dp</dimen>
<dimen name="cell_height">66dp</dimen>
<!-- 定义主程序的标题的字体大小 -->
<dimen name="title_font_size">18sp</dimen>
</resources>

integers.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
<integer name="font_size">20</integer>
</resources>

strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">Hello World, ValuesResTest!</string>
<string name="app_name">字符串、数字、尺寸资源</string>
<string name="c1">F00</string>
<string name="c2">0F0</string>
<string name="c3">00F</string>
<string name="c4">0FF</string>
<string name="c5">F0F</string>
<string name="c6">FF0</string>
<string name="c7">07F</string>
<string name="c8">70F</string>
<string name="c9">F70</string>
</resources>

ValueResTest.java

package org.crazyit.res;

import android.app.Activity;
import android.content.res.Resources;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.TextView;

/**
* Description:
* <br/>site: <a href="http://www.crazyit.org">crazyit.org</a>
* <br/>Copyright (C), 2001-2014, Yeeku.H.Lee
* <br/>This program is protected by copyright laws.
* <br/>Program Name:
* <br/>Date:
* @author  Yeeku.H.Lee kongyeeku@163.com
* @version  1.0
*/
public class ValuesResTest extends Activity
{
// 使用字符串资源
int[] textIds = new int[]
{
R.string.c1 , R.string.c2 , R.string.c3 ,
R.string.c4 , R.string.c5 , R.string.c6 ,
R.string.c7 , R.string.c8 , R.string.c9
};
// 使用颜色资源
int[] colorIds = new int[]
{
R.color.c1 , R.color.c2 , R.color.c3 ,
R.color.c4 , R.color.c5 , R.color.c6 ,
R.color.c7 , R.color.c8 , R.color.c9
};
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// 创建一个BaseAdapter对象
BaseAdapter ba = new BaseAdapter()
{
@Override
public int getCount()
{
// 指定一共包含9个选项
return textIds.length;
}

@Override
public Object getItem(int position)
{
// 返回指定位置的文本
return getResources().getText(textIds[position]);
}

@Override
public long getItemId(int position)
{
return position;
}
// 重写该方法，该方法返回的View将作为的GridView的每个格子
@Override
public View getView(int position
, View convertView, ViewGroup parent)
{
TextView text = new TextView(ValuesResTest.this);
Resources res = ValuesResTest.this.getResources();
// 使用尺度资源来设置文本框的高度、宽度
text.setWidth((int) res.getDimension(R.dimen.cell_width));
text.setHeight((int) res.getDimension(R.dimen.cell_height));
// 使用字符串资源设置文本框的内容
text.setText(textIds[position]);
// 使用颜色资源来设置文本框的背景色
text.setBackgroundResource(colorIds[position]);
text.setTextSize(20);
text.setTextSize(getResources()
.getInteger(R.integer.font_size));
return text;
}
};
GridView grid = (GridView)findViewById(R.id.grid01);
// 为GridView设置Adapter
grid.setAdapter(ba);
}
}

编译器自动生成的R.java文件：

/* AUTO-GENERATED FILE.  DO NOT MODIFY.
*
* This class was automatically generated by the
* aapt tool from the resource data it found.  It
* should not be modified by hand.
*/

package org.crazyit.res;

public final class R {
public static final class attr {
}
public static final class color {
public static final int c1=0x7f040000;
public static final int c2=0x7f040001;
public static final int c3=0x7f040002;
public static final int c4=0x7f040003;
public static final int c5=0x7f040004;
public static final int c6=0x7f040005;
public static final int c7=0x7f040006;
public static final int c8=0x7f040007;
public static final int c9=0x7f040008;
}
public static final class dimen {
public static final int cell_height=0x7f050002;
/**  定义GridView组件中每个单元格的宽度、高度
*/
public static final int cell_width=0x7f050001;
public static final int spacing=0x7f050000;
/**  定义主程序的标题的字体大小
*/
public static final int title_font_size=0x7f050003;
}
public static final class drawable {
public static final int ic_action_search=0x7f020000;
public static final int ic_launcher=0x7f020001;
}
public static final class id {
public static final int grid01=0x7f080000;
}
public static final class integer {
public static final int font_size=0x7f060000;
}
public static final class layout {
public static final int main=0x7f030000;
}
public static final class string {
public static final int app_name=0x7f070001;
public static final int c1=0x7f070002;
public static final int c2=0x7f070003;
public static final int c3=0x7f070004;
public static final int c4=0x7f070005;
public static final int c5=0x7f070006;
public static final int c6=0x7f070007;
public static final int c7=0x7f070008;
public static final int c8=0x7f070009;
public static final int c9=0x7f07000a;
public static final int hello=0x7f070000;
}
}

及BuildConfig.java：

/** Automatically generated file. DO NOT MODIFY */
package org.crazyit.res;

public final class BuildConfig {
public final static boolean DEBUG = true;
}

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