Android 程序啟動畫面之Splash總結

方法一：

很多應用都會有一個啟動界面。歡迎畫面慢慢隱現，然后慢慢消隱。實現這種效果的方法有兩種（暫時只發現兩種）
1、使用兩個Activity，程序啟動時候load第一張Activity，然后由tick觸發N秒鐘后startActivity另外一張Activity。
2、使用一個Activity，可以用到View.gone() 這個方法。把Acitivity的某些元素移除。

1、兩個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; //延遲三秒   

        @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);   
        }   
    }  

當然可以再Splash中加入動畫效果。(我覺得先要布局好AndroidManifest.xml。因為那才是工程的索引文件。首先在那要有一個統籌！而不是先寫java code。然后逐步往xml中增加 ，這說明對整個項目沒有一個統籌的設計)

方法二：

androidmanifest.xml就不多說了。先看布局代碼：

    <?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>  

有一個id為splashscreen 的linearlayout，是程序啟動時顯現的部分。id為browser是程序的主界面顯示部分。
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";  
//菜單
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); //去標題欄
    setContentView(R.layout.main);   
    animatinoGone = AnimationUtils.loadAnimation(this,R.anim.alpha_gone); //動畫效果
    myAnimation_Alpha = AnimationUtils.loadAnimation(this,R.anim.alpha_action); //動畫效果

    splash = (LinearLayout) findViewById(R.id.splashscreen);
    tv = (TextView) findViewById(R.id.info);
    tv.setText("正在建立數據連接");
    splash.startAnimation(myAnimation_Alpha);

    Message msg = new Message();
    msg.what = STOPSPLASH;
    splashHandler.sendMessageDelayed(msg, SPLASHTIME);

}