模拟器和手机上运行结果竟然不一样！
一个client程序，使用了双线程，一个线程接收server端发送过来的float数组（数组大小为1024），另外一个线程将其打印在手机屏幕上，循环往复。

程序在模拟器上运行很好，server每隔3秒钟产生和发送一次数据，client端也是每隔3秒钟将其打印出来（其实因为屏幕大小限制，只能打印出每个发送过来的float数组的头60个成员）。

但是问题来了，把apk文件安装在手机上之后，运行却出现了这样的问题：在打印完头60个成员，等待下面一个float数组到来之前，竟然又打印了此次接收的数组的别的60个成员（好像是从第700多个开始往后数60个），速度很快，一闪而过，然后就正常打印下面一个到来的数组的头60个成员了，相当于本来在3秒之内应该执行1遍的打印语句执行了2遍，这种情况在程序运行中时而出现时而又没有出现，实在搞不懂怎么回事，为何在模拟器上运行的没问题，到手机上就不行了。

我试着将float数组的大小降到64，就不存在这个问题了，很奇怪。请论坛上各位牛人帮小弟解惑，谢谢~

client代码

Java code

package com.Shownumbers2;    import android.app.Activity;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint; import android.os.Bundle; import android.view.SurfaceHolder;import android.view.SurfaceView;import android.view.View;import android.widget.Button; import java.io.BufferedInputStream;import java.io.IOException;import java.net.Socket; import java.util.concurrent.Semaphore;   class Q {        static int x=1024;//设置接收的数据大小，和server端相一致                                static float []d=new float[x];//定义一个float数组d，大小为x        static byte[] y =new byte[4*x];//定义用来接收数据的byte        static float[] a= new float[x];     // Start with consumer semaphore unavailable.         static Semaphore semCon = new Semaphore(0);         static Semaphore semProd = new Semaphore(1);               void pop() {//definition of pop()               try {          semCon.acquire(); // Acquires a permit from this semaphore, blocking until one is available       } catch(InterruptedException e) {          System.out.println("InterruptedException caught");        }             a=Shownumbers2.bytearrayTofloatarray(y,  x);//将产生的数组赋值给a                       Shownumbers2.Drawtext1(a,x,0);//显示float数组，并打印所花费的时间               semProd.release();//Releases a permit            }//end of pop()       void push() {//definition of push()     try {        semProd.acquire(); // Acquires a permit from this semaphore, blocking until one is available     } catch(InterruptedException e) {        System.out.println("InterruptedException caught");        }                 //接受socket传来的byte数组       try {           Shownumbers2.is = new BufferedInputStream(Shownumbers2.socket.getInputStream());           Shownumbers2.is.read(Q.y);      } catch (IOException e) {          // TODO Auto-generated catch block            e.printStackTrace();     }        //startTime= System.currentTimeMillis();//从接收到数据开始计时             semCon.release(); //Releases a permit     }//end of push()      } //end of Class Q class Producer implements Runnable { //Class Producer get the Object of Q and run the push()     Q q;        Producer(Q q) {          this.q = q;           //new Thread(this).start();         }             public void run() {           while(true){          q.push();           }             }     }//end of Class Producer   class Consumer implements Runnable { //Class Consumer get the Object of Q and run the pop()      Q q;        Consumer(Q q) {           this.q = q;           //new Thread(this).start();          }       public void run() {                   while(true){         q.pop();          }      }     } //end of Class Consumer public class Shownumbers2 extends Activity {    /** Called when the activity is first created. */     static Socket socket;     static BufferedInputStream is;               Button  btnDrawText;    static SurfaceView sfv;    static SurfaceHolder sfh;             static Paint paint  = new Paint();          Q q = new Q();      Thread C = new Thread( new Consumer(q) );     Thread P = new Thread( new Producer(q));          static Canvas canvas=new Canvas();/*** * 主函数 */    @Override    public void onCreate(Bundle savedInstanceState) {//onCreate开始                super.onCreate(savedInstanceState);        setContentView(R.layout.main);                         paint .setColor(Color.GREEN);// green pen        sfv = (SurfaceView) this.findViewById(R.id.SurfaceView01);        sfh = sfv.getHolder();                                    btnDrawText = (Button) this.findViewById(R.id.Button01);//加入DrawBall按钮        btnDrawText.setOnClickListener(new Button.OnClickListener() {//设置按钮监听器并设置按下按钮之后的动作             public void onClick(View v)               {                              //创建socket                              try {                    socket = new Socket("192.168.1.11",4700);                    } catch (Exception e) {                     e.printStackTrace();                   }                                      Thread C = new Thread( new Consumer(q) );                      Thread P = new Thread( new Producer(q));                                                 C.start();                       P.start();                       }              });             }//主函数结束             /*     * 定义绘画函数DrawSin     */    static void Drawtext1(float[] a,int x,long time) {                       canvas = sfh.lockCanvas();// specify a rectangle which will be drawn                    paint .setAntiAlias(true);                    canvas.drawColor(Color.BLACK);// clean up the canvas                       int y=20;//从像素y=20开始          for(int i=0;i<x;i++)          {            canvas.drawText(""+a[i] , 80 , y, paint);          y+=10;//两行之间相隔10个像素点          }                                        canvas.drawText("Time="+time+"ms" , 200 , 70, paint);          sfh.unlockCanvasAndPost(canvas);// unlock the canvas and show the drawn picture                             }//end of Drawtext1()           public static float[] bytearrayTofloatarray(byte[] data ,int x) {//将传过来的byte数组恢复成float数组                     int   [] l= new int[x];           float [] d= new float[x];                     int k=0;            for(int j=0;j<x;j++){              for (int i=0 ; i < 4; i++) {              l[j] <<= 8;              l[j] |= (data[k] & 0xff);              k+=1;              }           }            for (int i=0;i<x;i++)           {             d[i] = Float.intBitsToFloat(l[i]);            }           return d;        } }//end of class AndroidSinFinal 
 

[解决办法]
socket发送的数据包过大 会自动分包 分多次发

你发的数据再大些还会超过2次呢