Android 特殊用法介绍

< shape xmlns:android ="http://schemas.android .com/apk/res/android " android :shape="rectangle" >

< gradient android :startColor="#FFFFFFFF" android :endColor="#FFFF0000"

android :angle="270"/ >

< /shape >

在该文件中设置渐变的开始颜色(startColor)、结束颜色(endColor)和角度(angle)

接着创建一个主题values/style.xml

< ?xml version="1.0" encoding="utf-8"? >

< resources >

< style name="NewTheme" parent="android :Theme" >

< item name="android :background" >@drawable/shape< /item >

< /style >

< /resources >

然后在AndroidManifest.xml文件中的application或activity中引入该主题,如:

< activity android :name=".ShapeDemo" android :theme="@style/NewTheme" >

该方法同样适用于控件 http://17f8.cn/trackback.php?tbID=259&extra=9d45e9

12. 储存数据 当你在一个实例中保存静态数据，此示例关闭后 下一个实例想引用 静态数据就会为null，这里呢必须重写applition

public class MyApplication extends Application{

private String thing = null;

public String getThing(){

return thing;

}

public void setThing( String thing ){

this.thing = thing; }

}

public class MyActivity extends Activity {

private MyApplication app;

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

app = ((MyApplication)getApplication());

String thing = app.getThing();

}

}