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">
<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);
}