Android 程序启动画面之Splash总结

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

    <?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">             <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>  

    package 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);             }         }  

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：

    <?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);      }  };    @Override  protected 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);    }