在Android中创建启动界面

1、制作一张启动图片splash.png，放置在res->drawable-hdpi文件夹中。

2、新建布局文件splash.xml

<? xmlversion="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:gravity ="bottom|center" android:orientation ="vertical"
android:background ="@drawable/splash" >
< TextView android:text ="@+id/TextView01" android:layout_width ="wrap_content"
android:layout_height ="wrap_content" android:layout_marginTop ="20dip"
android:typeface ="sans" android:shadowDx ="0" android:shadowDy ="2"
android:shadowRadius ="1" android:shadowColor ="#FFFFFF"
android:textColor ="#444444" android:textSize ="20dip" android:id ="@+id/versionNumber"
android:gravity ="bottom" >
</ TextView >
</ LinearLayout >

这里我们把上一步制作的图片作为启动界面的背景图，然后在界面底部显示当前程序的版本号。

3、新建SplashActivity，在Oncreate中添加以下代码：

setContentView(R.layout.splash);

PackageManagerpm = getPackageManager();
try {
PackageInfopi = pm.getPackageInfo( " com.lyt.android " , 0 );
TextViewversionNumber = (TextView)findViewById(R.id.versionNumber);
versionNumber.setText( " Version " + pi.versionName);
} catch (NameNotFoundExceptione){
e.printStackTrace();
}

new Handler().postDelayed( new Runnable(){

@Override
public void run(){
Intentintent = new Intent(SplashActivity. this ,SplashScreenActivity. class );
startActivity(intent);
SplashActivity. this .finish();
}

}, 2500 );

4、修改Manifest文件，将启动界面Activity改为默认启动，并且设置标题栏不可见。

<?xmlversion="1.0"encoding="utf-8"?>

< manifestxmlns:android = " http://schemas.android.com/apk/res/android "
package = " com.lyt.android " android:versionCode = " 1 " android:versionName = " 1.0 " >
< applicationandroid:icon = " @drawable/icon " android:label = " @string/app_name " >

< activityandroid:name = " .SplashActivity " android:label = " @string/app_name "
android:theme = " @android:style/Theme.NoTitleBar " >
< intent - filter >
< actionandroid:name = " android.intent.action.MAIN " />
< categoryandroid:name = " android.intent.category.LAUNCHER " />
</ intent - filter >
</ activity >
< activityandroid:name = " .SplashScreenActivity " android:label = " @string/app_name " >
</ activity >
</ application >
< uses - sdkandroid:minSdkVersion = " 8 " />

</ manifest >

5、显示效果如下：

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