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

 

<? 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: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);        

        PackageManager pm  =  getPackageManager();
          try  {
                PackageInfo pi  =  pm.getPackageInfo( " com.lyt.android " ,  0 );
                TextView versionNumber  =  (TextView) findViewById(R.id.versionNumber);
                versionNumber.setText( " Version  "   +  pi.versionName);
            }  catch  (NameNotFoundException e) {
                e.printStackTrace();
            }
        
         new  Handler().postDelayed( new  Runnable(){

            @Override
             public   void  run() {
                Intent intent  =   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。

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

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

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

 

 5、显示效果如下：