android程式啟動畫面之Splash總結

來源:互聯網
上載者:User

方法一:

很多應用都會有一個啟動介面。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,程式啟動時候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"&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>

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檔案。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,是程式啟動時顯現的部分。id為browser是程式的主介面顯示部分。

loading_exit.xml 檔案如下:

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
    <alpha
        android:fromAlpha="1.0"
        android:toAlpha="0.1"
        android:duration="250"
    />

</set>

loading_enter檔案如下:

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <alpha
        android:fromAlpha="0.1"
        android:toAlpha="1.0"
        android:duration="250"
    />
</set>

具體屬性設定參考:http://blog.csdn.net/hgl868/article/details/6711111

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); //去標題列
    setContentView(R.layout.main);   
    animatinoGone = AnimationUtils.loadAnimation(this,R.anim.loading_exit); //動畫效果
    myAnimation_Alpha = AnimationUtils.loadAnimation(this,R.anim.loading_enter); //動畫效果
   
    splash = (LinearLayout) findViewById(R.id.splashscreen);
    tv = (TextView) findViewById(R.id.info);
    tv.setText("正在建立資料連線");
    splash.startAnimation(myAnimation_Alpha);
   
    Message msg = new Message();
    msg.what = STOPSPLASH;
    splashHandler.sendMessageDelayed(msg, SPLASHTIME);
 
}

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