android软件启动：多张背景图片形成动画效果启动

这里简单介绍android的一种软件启动方式：多张背景图片形成动画效果的activity加载后跳到主activity.

启动activity（StartActivity.java）：

package com.tody.startdemo;

import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.WindowManager;
import android.widget.LinearLayout;

/**
* 根据不同状态的图片做成动画的效果
*
* @author Administrator
*
*/
public class StartActivity extends Activity {

private LinearLayout mLinearLayout;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_start);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);// 满屏
mLinearLayout = (LinearLayout) findViewById(R.id.start_layout);
}

Handler mHandler = new Handler() {
public void handleMessage(android.os.Message msg) {
switch (msg.what) {// 处理消息
case 1:
mLinearLayout.setBackgroundResource(R.drawable.startup0);
break;
case 2:
mLinearLayout.setBackgroundResource(R.drawable.startup1);
break;
case 3:
mLinearLayout.setBackgroundResource(R.drawable.startup2);
break;
case 4:
mLinearLayout.setBackgroundResource(R.drawable.startup3);
break;
case 5:
mLinearLayout.setBackgroundResource(R.drawable.startup4);
break;
case 6:
mLinearLayout.setBackgroundResource(R.drawable.startup5);
break;
case 7:
Intent mIntent = new Intent();
mIntent.setClass(StartActivity.this, MainActivity.class);
startActivity(mIntent);// 跳转到主界面
finish();// 关闭掉当前界面
break;

default:
break;
}
};
};

@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
int time = 350;
mHandler.sendMessageDelayed(mHandler.obtainMessage(1), time * 1);// 延时发送消息
mHandler.sendMessageDelayed(mHandler.obtainMessage(2), time * 2);
mHandler.sendMessageDelayed(mHandler.obtainMessage(3), time * 3);
mHandler.sendMessageDelayed(mHandler.obtainMessage(4), time * 4);
mHandler.sendMessageDelayed(mHandler.obtainMessage(5), time * 5);
mHandler.sendMessageDelayed(mHandler.obtainMessage(6), time * 6);
mHandler.sendMessageDelayed(mHandler.obtainMessage(7), time * 7);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.start, menu);
return true;
}

}

启动activity的布局文件start_layout.xml：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".StartActivity" >

<LinearLayout
android:id="@+id/start_layout"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="@drawable/startup"
>

</LinearLayout>

</LinearLayout>

主界面activity（MainActivity.java）：

package com.tody.startdemo;

import android.app.Activity;
import android.os.Bundle;
/**
* 主界面
* @author Administrator
*
*/
public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}

}

主界面布局文件(activity_main.xml)：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".StartActivity" >

<TextView
android:layout_gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="加载成功，进入主界面"
android:textSize="20sp"
/>

</LinearLayout>

其中需要的图片，可以自己准备（PS：因为要做成动画的效果，所以图要做成各个状态，而这个状态就刚好行成一个动画的效果，这样就达到了动画加载的效果了）。

主配置文件:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.tody.startdemo"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />

<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.tody.startdemo.StartActivity"
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="com.tody.startdemo.MainActivity"
>

</activity>

</application>

</manifest>