Android 个人理财工具一：项目概述与启动界面的实现

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout android:id="@+id/RelativeLayout01" xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_gravity="center_vertical|center_horizontal" 
android:layout_height="wrap_content" 
android:layout_width="wrap_content"> 
<ImageView android:id="@+id/ImageView01" 
android:src="@drawable/logo3" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content"> 
</ImageView> 
<TextView android:id="@+id/TextView01" 
android:text="@string/welcome" 
android:layout_below="@id/ImageView01" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content"> 
</TextView> 
</RelativeLayout> 

//给主线程发送消息更新imageview 
mHandler = new Handler() { 
@Override 
public void handleMessage(Message msg) { 
super.handleMessage(msg); 
imageview.setAlpha(alpha); 
imageview.invalidate(); 
} 
}; 
new Thread(new Runnable() { 
public void run() { 
while (b < 2) { 
try { 
//延时2秒后,每50毫秒更新一次imageview 
if (b == 0) { 
Thread.sleep(2000); 
b = 1; 
} else { 
Thread.sleep(50); 
} 
updateApp(); 
} catch (InterruptedException e) { 
e.printStackTrace(); 
} 
} 
} 
}).start(); 
public void updateApp() { 
alpha -= 5;//每次减少alpha 5 
if (alpha <= 0) { 
b = 2; 
Intent in = new Intent(this, com.cola.ui.Frm_Addbills.class); 
startActivity(in);//启动下个界面 
} 
mHandler.sendMessage(mHandler.obtainMessage()); 
} 

package com.cola.ui; 
import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.os.Handler; 
import android.os.Message; 
import android.util.Log; 
import android.view.KeyEvent; 
import android.widget.ImageView; 
import android.widget.TextView; 
public class ColaBox extends Activity { 
 private Handler mHandler = new Handler(); 
 ImageView imageview; 
 TextView textview; 
 int alpha = 255; 
 int b = 0; 
 public void onCreate(Bundle savedInstanceState) { 
 super.onCreate(savedInstanceState); 
 setContentView(R.layout.main); 
 imageview = (ImageView) this.findViewById(R.id.ImageView01); 
 textview = (TextView) this.findViewById(R.id.TextView01); 
 Log.v("ColaBox", "ColaBox start ..."); 
 imageview.setAlpha(alpha); 
 new Thread(new Runnable() { 
 public void run() { 
 initApp(); //初始化程序 
  
 while (b < 2) { 
  try { 
  if (b == 0) { 
  Thread.sleep(2000); 
  b = 1; 
  } else { 
  Thread.sleep(50); 
  } 
  updateApp(); 
  } catch (InterruptedException e) { 
  e.printStackTrace(); 
  } 
 } 
 } 
 }).start(); 
 mHandler = new Handler() { 
 @Override 
 public void handleMessage(Message msg) { 
 super.handleMessage(msg); 
 imageview.setAlpha(alpha); 
 imageview.invalidate(); 
 } 
 }; 
 } 
 public void updateApp() { 
 alpha -= 5; 
 if (alpha <= 0) { 
 b = 2; 
 Intent in = new Intent(this, com.cola.ui.Frm_Addbills.class); 
 startActivity(in); 
 } 
 mHandler.sendMessage(mHandler.obtainMessage()); 
 } 
 
 public void initApp(){ 
 
 } 
}