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方法一:

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)
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。
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。

1、两个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>

然后是JAVA代码:

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);
    }
}

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)

方法二:

androidmanifest.xml就不多说了。先看布局代码:

<?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。

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);
 
}

 

本文来自CSDN博客,转载请标明出处:http://blog.csdn.net/muyu114/archive/2010/07/15/5736354.aspx

posted on 2010-12-29 16:14  stay  阅读(1439)  评论(0编辑  收藏