java 酒店预定 app_Android应用源码酒店在线预定app项目全套

【实例简介】

Android应用源码酒店在线预定app项目全套

【实例截图】

【核心代码】

package com.bn.summer;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.Paint;

import android.os.Message;

import android.view.SurfaceHolder;

import android.view.SurfaceView;

public class WelcomeView extends SurfaceView

implements SurfaceHolder.Callback   //实现生命周期回调接口

{

MainActivity activity;//activity的引用

Paint paint;      //画笔

int currentAlpha=0;  //当前的不透明值

int screenWidth=320;   //屏幕宽度

int screenHeight=480;  //屏幕高度

int sleepSpan=50;      //动画的时延ms

Bitmap[] logos=new Bitmap[2];//logo图片数组

Bitmap currentLogo;  //当前logo图片引用

int currentX;      //图片位置

int currentY;

public WelcomeView(MainActivity activity)

{

super(activity);

this.activity = activity;

this.getHolder().addCallback(this);  //设置生命周期回调接口的实现者

paint = new Paint();  //创建画笔

paint.setAntiAlias(true);  //打开抗锯齿

//加载图片

logos[0]=BitmapFactory.decodeResource(activity.getResources(), R.drawable.baina);

logos[1]=BitmapFactory.decodeResource(activity.getResources(), R.drawable.bnkjs);

}

public void onDraw(Canvas canvas)

{

//绘制黑填充矩形清背景

paint.setColor(Color.BLACK);//设置画笔颜色

paint.setAlpha(255);//设置不透明度为255

canvas.drawRect(0, 0, screenWidth, screenHeight, paint);

//进行平面贴图

if(currentLogo==null)return;

paint.setAlpha(currentAlpha);

canvas.drawBitmap(currentLogo, currentX, currentY, paint);

}

public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3)

{

}

public void surfaceCreated(SurfaceHolder holder) //创建时被调用

{

new Thread()

{

public void run()

{

for(Bitmap bm:logos)

{

currentLogo=bm;//当前图片的引用

currentX=screenWidth/2-bm.getWidth()/2;//图片位置

currentY=screenHeight/2-bm.getHeight()/2;

for(int i=255;i>-10;i=i-10)

{//动态更改图片的透明度值并不断重绘

currentAlpha=i;

if(currentAlpha<0)//如果当前不透明度小于零

{

currentAlpha=0;//将不透明度置为零

}

SurfaceHolder myholder=WelcomeView.this.getHolder();//获取回调接口

Canvas canvas = myholder.lockCanvas();//获取画布

try{

synchronized(myholder)//同步

{

onDraw(canvas);//进行绘制绘制

}

}

catch(Exception e)

{

e.printStackTrace();

}

finally

{

if(canvas!= null)//如果当前画布不为空

{

myholder.unlockCanvasAndPost(canvas);//解锁画布

}

}

try

{

if(i==255)//若是新图片，多等待一会

{

Thread.sleep(1000);

}

Thread.sleep(sleepSpan);

}

catch(Exception e)//抛出异常

{

e.printStackTrace();

}

}

}

Message msg=new Message();

msg.what=Constant.GOTOLOGIN;

activity.hd.sendMessage(msg);//发送消息，开始加载棋子模型

}

}.start();

}

public void surfaceDestroyed(SurfaceHolder arg0)

{//销毁时被调用

}

}