android程序启动画面之Splash总结

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

<a target=_blank href="http://app918.com"><?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></a>

然后是JAVA代码：

<a target=_blank href="http://app918.com">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);     } }</a>

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：

<a target=_blank href="http://app918.com"><?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></a>

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);

}