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,然後慢慢消隱。實現這種效果的方法有兩種(暫時隻發現兩種)
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

[java]
<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="https://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:

[java] 
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。(我覺得先要佈局好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就不多說瞭。先看佈局代碼:

[java] 
<?xml version=”1.0″ encoding=”utf-8″?> 
<LinearLayout xmlns:android=”https://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);

}

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