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android程序启动画面之Splash总结

2014-04-06 19:32 477 查看

文章出处：http://www.oschina.net/question/54100_34020

方法一：

很多应用都会有一个启动界面。欢迎画面慢慢隐现，然后慢慢消隐。实现这种效果的方法有两种（暂时只发现两种）

1、使用两个Activity，程序启动时候load第一张Activity，然后由tick触发N秒钟后startActivity另外一张Activity。

2、使用一个Activity，可以用到View.gone() 这个方法。把Acitivity的某些元素移除。

1、两个Activity：

首先是AndroidManifest.xml

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

02	< manifest xmlns:android = "http://schemas.android.com/apk/res/android"

03	package = "com.sunshine.splash"

04	android:versionCode = "1"

05	android:versionName = "1.0" >

06	<application android:icon = "@drawable/icon" ; android:label = "@string/app_name" > ;

07	< activity android:name = ".Splash"

08	android:label = "@string/app_name" > ;

09	< intent-filter >

10	< action android:name = "android.intent.action.MAIN" />

11	< category android:name = "android.intent.category.LAUNCHER" />

12	</ intent-filter >

13	</ activity >

14	< activity android:name = "Main" >

15	</ activity >

16	</ application >

17	< uses-sdk android:minSdkVersion = "3" />

18	</ manifest >

然后是JAVA代码：

01	package net.hlovey.splash;

02	import android.app.Activity;

03	import android.content.Intent;

04	import android.os.Bundle;

05	import android.os.Handler;

07	public class Splash extends Activity {

09	private final int SPLASH_DISPLAY_LENGHT = 3000 ; //延迟三秒

@Override

12	public void onCreate(Bundle savedInstanceState) {

13	super .onCreate(savedInstanceState);

14	setContentView(R.layout.splash);

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

@Override

18	public void run() {

19	Intent mainIntent = new Intent(Splash. this ,Main. class );

20	Splash. this .startActivity(mainIntent);

21	Splash. this .finish();

24	}, SPLASH_DISPLAY_LENGHT);

当然可以再Splash中加入动画效果。(我觉得先要布局好AndroidManifest.xml。因为那才是工程的索引文件。首先在那要有一个统筹！而不是先写java code。然后逐步往xml中增加，这说明对整个项目没有一个统筹的设计)

方法二：

androidmanifest.xml就不多说了。先看布局代码：

01	<? xml version=”1.0″ encoding=”utf-8″?>

02	< LinearLayout xmlns:android=”http://schemas.android.com/apk/res/android”

03	android:orientation=”vertical”

04	android:layout_width=”fill_parent”

05	android:layout_height=”fill_parent”>

06	< LinearLayout android:id=”@+id/splashscreen” android:orientation=”vertical”

07	android:layout_width=”fill_parent” android:layout_height=”fill_parent”>

08	< ImageView android:layout_width=”wrap_content”

09	android:layout_height=”wrap_content” android:src=”@drawable/splash”

10	android:layout_gravity=”center”

11	android:layout_marginTop=”130px”/>

12	< TextView

13	android:id=”@+id/info”

14	android:layout_width=”fill_parent”

15	android:layout_height=”wrap_content”

16	android:gravity=”center”

17	android:paddingTop=”10px”

18	android:text=”This is a splash!!”/>

19	</ LinearLayout >

20	< WebView android:id=”@+id/browser”

21	android:layout_width=”fill_parent”

22	android:layout_height=”fill_parent” android:layout_weight=”1″/>

23	</ LinearLayout >

有一个id为splashscreen 的linearlayout，是程序启动时显现的部分。id为browser是程序的主界面显示部分。

01	package net.hlovey.s;

02	import android.app.Activity;

03	import android.app.AlertDialog;

04	import android.content.DialogInterface;

05	import android.content.Intent;

06	import android.os.Bundle;

07	import android.os.Handler;

08	import android.os.Message;

09	import android.util.Log;

10	import android.view.LayoutInflater;

11	import android.view.animation.Animation;

12	import android.view.animation.AnimationUtils;

13	import android.widget.LinearLayout;

14	import android.widget.TextView;

15	import android.widget.Toast;

16	public class WebGameActivity extends Activity {

18	private WebView webView;

20	private Handler mHandler = new Handler();

22	private static final String TAG = "WebGameActivity" ;

//菜单

24	private static final int MENU_RELOAD = Menu.FIRST;

25	private static final int MENU_HELP = Menu.FIRST + 1 ;

26	private static final int MENU_ABOUT = Menu.FIRST + 2 ;

27	private static final int MENU_CLOSE = Menu.FIRST + 3 ;

28	private int staus = 0 ;

30	private static final int STOPSPLASH = 0 ;

31	//time in milliseconds

32	private static final long SPLASHTIME = 1000 ;

34	private LinearLayout splash;

35	private TextView tv;

37	private Animation myAnimation_Alpha;

38	private Animation animatinoGone ;

40	private Handler splashHandler = new Handler() {

41	public void handleMessage(Message msg) {

42	switch (msg.what) {

43	case STOPSPLASH:

44	if ( staus == 1 ){

45	splash.startAnimation(animatinoGone);

46	splash.setVisibility(View.GONE);

break

49	sendEmptyMessageDelayed(STOPSPLASH, SPLASHTIME);

51	super .handleMessage(msg);

};

@Override

56	protected void onCreate(Bundle savedInstanceState) {

57	super .onCreate(savedInstanceState);

58	getWindow().requestFeature(Window.FEATURE_PROGRESS); //去标题栏

59	setContentView(R.layout.main);

60	animatinoGone = AnimationUtils.loadAnimation( this ,R.anim.alpha_gone); //动画效果

61	myAnimation_Alpha = AnimationUtils.loadAnimation( this ,R.anim.alpha_action); //动画效果

63	splash = (LinearLayout) findViewById(R.id.splashscreen);

64	tv = (TextView) findViewById(R.id.info);

65	tv.setText( "正在建立数据连接" );

66	splash.startAnimation(myAnimation_Alpha);

68	Message msg = new Message();

69	msg.what = STOPSPLASH;

70	splashHandler.sendMessageDelayed(msg, SPLASHTIME);

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