android程序啟動畫面-Splash

 方法一：

很多應用都會有一個啟動界面。歡迎畫面慢慢隱現，然後慢慢消隱。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，然後由tick觸發N秒鐘後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>

然後是JAVA代碼：

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。然後逐步往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);

}