android程序启动画面之Splash总结

android程序刚打开时由于加载布局等原因，可能会出现白屏的情况。加上启动页面，画面切换自然流畅。
目前实现方法有两种：
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。
首先是AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"      package="com.sunshine.splash"      android:versionCode="1"      android:versionName="1.0"&gt;     <application android:icon="@drawable/icon" ;android:label="@string/app_name"> ;        <activity android:name=".Splash"                  android:label="@string/app_name"> ;            <intent-filter>                <action android:name="android.intent.action.MAIN"/>                 <category android:name="android.intent.category.LAUNCHER" />             </intent-filter>         </activity>     <activity android:name="Main">    </activity> </application>     <uses-sdk android:minSdkVersion="3" /> </manifest>

然后是JAVA代码：

ackage net.hlovey.splash; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.os.Handler; public class Splash extends Activity {        private final int SPLASH_DISPLAY_LENGHT = 3000; //延迟三秒     @Override    public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.splash);         new Handler().postDelayed(new Runnable(){          @Override         public void run() {              Intent mainIntent = new Intent(Splash.this,Main.class);              Splash.this.startActivity(mainIntent);                  Splash.this.finish();          }         }, SPLASH_DISPLAY_LENGHT);     } }

方法二：
布局代码：

<?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”>        <LinearLayout android:id=”@+id/splashscreen” android:orientation=”vertical”          android:layout_width=”fill_parent” android:layout_height=”fill_parent”>          <ImageView android:layout_width=”wrap_content”               android:layout_height=”wrap_content” android:src=”@drawable/splash”               android:layout_gravity=”center”               android:layout_marginTop=”130px”/>          <TextView               android:id=”@+id/info”               android:layout_width=”fill_parent”               android:layout_height=”wrap_content”               android:gravity=”center”               android:paddingTop=”10px”               android:text=”This is a splash!!”/>     </LinearLayout>     <WebView android:id=”@+id/browser”android:layout_width=”fill_parent”android:layout_height=”fill_parent” android:layout_weight=”1″/></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。

package net.hlovey.s; import android.app.Activity; import android.app.AlertDialog; import android.content.DialogInterface; import android.content.Intent; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.util.Log; import android.view.LayoutInflater; import android.view.animation.Animation; import android.view.animation.AnimationUtils; import android.widget.LinearLayout; import android.widget.TextView; import android.widget.Toast; public class WebGameActivity extends Activity { private WebView webView; private Handler mHandler = new Handler(); private static final String TAG = "WebGameActivity";   //菜单 private static final int MENU_RELOAD = Menu.FIRST; private static final int MENU_HELP = Menu.FIRST + 1; private static final int MENU_ABOUT = Menu.FIRST + 2; private static final int MENU_CLOSE = Menu.FIRST + 3;   private int staus = 0; private static final int STOPSPLASH = 0; //time in milliseconds private static final long SPLASHTIME = 1000; private LinearLayout splash; private TextView tv; private Animation myAnimation_Alpha; private Animation animatinoGone ; private Handler splashHandler = new Handler() {     public void handleMessage(Message msg) {          switch (msg.what) {          case STOPSPLASH:               if( staus == 1 ){                                splash.startAnimation(animatinoGone);                 splash.setVisibility(View.GONE);                 break;               }               sendEmptyMessageDelayed(STOPSPLASH, SPLASHTIME);          }          super.handleMessage(msg);     } }; @Overrideprotected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     getWindow().requestFeature(Window.FEATURE_PROGRESS); //去标题栏     setContentView(R.layout.main);        animatinoGone = AnimationUtils.loadAnimation(this,R.anim.alpha_gone); //动画效果     myAnimation_Alpha = AnimationUtils.loadAnimation(this,R.anim.alpha_action); //动画效果     splash = (LinearLayout) findViewById(R.id.splashscreen);     tv = (TextView) findViewById(R.id.info);     tv.setText("正在建立数据连接");     splash.startAnimation(myAnimation_Alpha);     Message msg = new Message();     msg.what = STOPSPLASH;     splashHandler.sendMessageDelayed(msg, SPLASHTIME); }

http://www.oschina.net/question/54100_34020