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);

}