Android Open Source - NotATop Welcome Surface View

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Back to project page NotATop.
License

The source code is released under:
GNU General Public License
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Java Source Code

package com.gg.view;
// ww  w  . ja v a 2s.c  om
import com.gg.util.Constant;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class WelcomeSurfaceView extends SurfaceView 
implements SurfaceHolder.Callback  //????????????????
{
  MainActivity mainActivity;
  Paint paint;//????
  int currentAlpha=0;//??????????
  
  int screenWidth=Constant.SCREEN_WIDTH;//??????
  int screenHeight=Constant.SCREEN_HEIGHT;//??????
  int sleepSpan=50;//?????????ms
  
  Bitmap[] images=new Bitmap[2];//logo??????
  Bitmap currentImage;//???logo??????
  int currentX;
  int currentY;
  
  public WelcomeSurfaceView(MainActivity mainActivity) {
    super(mainActivity);
    this.mainActivity = mainActivity;
    this.getHolder().addCallback(this);//???????????????????????
    paint = new Paint();//????????
    paint.setAntiAlias(true);//??????
    
    //??????
    images[0]=BitmapFactory.decodeResource(mainActivity.getResources(), R.drawable.welcome_top); 
    images[1]=BitmapFactory.decodeResource(mainActivity.getResources(), R.drawable.welcome_gg);
  }
  public void onDraw(Canvas canvas){  
    //???????????????
    paint.setColor(Color.BLACK);//?????????
    paint.setAlpha(255);
    canvas.drawRect(0, 0, screenWidth, screenHeight, paint);
    
    //??????????
    if(currentImage==null)return;
    paint.setAlpha(currentAlpha);    
    //canvas.drawBitmap(currentImage, currentX, currentY, paint);  
    
    canvas.drawBitmap(currentImage, new Rect(0, 0,
        (int) currentImage.getWidth(), (int) currentImage
            .getHeight()), new Rect(0, 0,
        (int) Constant.SCREEN_WIDTH, (int) Constant.SCREEN_HEIGHT), paint);

  }

  public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
    
  }
  public void surfaceCreated(SurfaceHolder holder) {//???????????    
    new Thread()
    {
      public void run()
      {
        for(Bitmap bm:images)
        {
          currentImage=bm;
          //?????????
          currentX=screenWidth/2-bm.getWidth()/2;
          currentY=screenHeight/2-bm.getHeight()/2;
          
          for(int i=255;i>-100;i=i-15)
          {//??????????????????????????  
            currentAlpha=i;
            if(currentAlpha<0)
            {
              currentAlpha=0;
            }
            SurfaceHolder myholder=WelcomeSurfaceView.this.getHolder();
            Canvas canvas = myholder.lockCanvas();//???????
            try{
              synchronized(myholder){
                onDraw(canvas);//????
              }
            }
            catch(Exception e){
              e.printStackTrace();
            }
            finally{
              if(canvas != null){
                myholder.unlockCanvasAndPost(canvas);
              }
            }            
            try
            {
              if(i==255)
              {//?????????????????
                Thread.sleep(1000);
              }
              Thread.sleep(sleepSpan);
            }
            catch(Exception e)
            {
              e.printStackTrace();
            }
          }
        }
        //??????????????????????
        //activity.sendMessage(WhatMessage.GOTO_MAIN_MENU_VIEW);
        mainActivity.getHandler().sendEmptyMessage(SurfaceViewFactory.MAIN_MENU);
      }
    }.start();
  }

  public void surfaceDestroyed(SurfaceHolder arg0) {//???????????

  }
}
Java Source Code List
