android程序启动画面之Splash总结

     <p>方法一：</p>    <p>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）<br /> 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。<br /> 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。</p>    <p>1、两个Activity：<br /> 首先是AndroidManifest.xml</p>    <pre class="brush:xml; toolbar: true; auto-links: false;"><?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></pre>然后是JAVA代码：    <pre class="brush:java; toolbar: true; auto-links: false;">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);      }  }</pre>    <p></p>    <p>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)</p>    <p>方法二：</p>    <p>androidmanifest.xml就不多说了。先看布局代码：</p>    <pre class="brush:xml; toolbar: true; auto-links: false;"><?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></pre>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。    <pre class="brush:java; toolbar: true; auto-links: false;">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);   }</pre>    <p></p>    <p></p>