1、An droid開發(fā)時(shí)的Socket通信介紹作者:日期:2012-4-10Socket通信當(dāng)服務(wù)器端斷開時(shí)，用戶端可以進(jìn)行如下設(shè)置解決方法：/ global variablespublic Socket socket = nu II;private In etSocketAddress isa = nu II;private static final Stri ng HOST = 6;private static final Stri ng PORT = 5000;private static final Stri ng TIMEOUT = 100;/conn ect to

2、 servertrysocket = new Socket();isa = new In etSocketAddress(HOST,PORT);socket.co nn ect(isa,TIMEOUT);catch(IOExcepti on e)e.pri ntStackTrace();finn allythis.disc onn ectToServer();/disc onnect to servertryif(socket != n ull)socket.close();catch(IOExcepti on e)e.pri ntStackTrace();publicMyConn ector

3、(Stri ng address,int port)try socket=new Socket();isa =new In etSocketAddress(address,port);socket.connect(isa , TIMEOUT);din =new DataI nputStream(socket .getI nputStream();/獲得輸入流doutnew DataOutputStream(socket .getOutputStream();/獲得輸出流 catch (Exception e)e.pri ntStackTrace();socket = n ullfin ally

4、1) 之前鏈接socket直接用:Log.i ( MyConnector,socket is or not +socketLog.i ( MyConnector,din is or not +din );Log.i ( MyConnector,dout is or not + dout );)；100ms超時(shí)時(shí)間，也會(huì)過很長(zhǎng)時(shí)間才會(huì)Socket socket = new Socket(6,5000); socket.setTimeout(100);這樣，如果出現(xiàn)服務(wù)器端未開啟時(shí)，即使設(shè)置了捕捉到 lOException現(xiàn)在先定義isa，通過isa跟socket鏈接 可以解決

5、上面的問題2)解決方法：class MyThread exte nds Threadpublic void run()try socket = new Socket( address1 , port1 );din = new DataI nputStream(socket .getI nputStream();/獲得輸入流dout = new DataOutputStream(socket .getOutputStream();/獲得輸出流 catch (Exception e)e.pri ntStackTrace();/public MyConn ector(Stri ng address,

6、i nt port)/address1 = address;/port1 = port;/MyThreadmt = new MyThread();/mt.start();/try/*Thread.sleep(outtime);*/for(i nt i = 0;i 50; i+)/ /Thread.sleep(outtime);/if(socket = n ull) contin ue;/else break;/catch(Excepti on e)/e.pri ntStackTrace();/if (socket = n ull)/mt. in terrupt();/socket = null

7、;/聲明Socket 對(duì)象/din = null;/聲明數(shù)據(jù)輸入流對(duì)象/dout = null; /聲明數(shù)據(jù)輸岀流對(duì)象/Log.i(MyCo nn ector, socket is or not +socket);/Log.i(MyConnector, din is or not +din);/Log.i(MyCo nn ector, dout is or not +dout);/ Toast的使用：An droid中的Toast是一種簡(jiǎn)易的消息提示框，toast提示框不能被用戶點(diǎn)擊，toast會(huì)根據(jù)用 戶設(shè)置的顯示時(shí)間后自動(dòng)消失。創(chuàng)建Toast兩個(gè)方法創(chuàng)建ToastJava代碼makeTex

8、t(C on text con text, int resId, int durati on)參數(shù)：con text是toast顯示在哪個(gè)上下文，通常是當(dāng)前Activity ;resld指顯示內(nèi)容引用 Resouce 那條數(shù)據(jù)，就是從 R類中去指定顯示的消息內(nèi)容；duration指定顯示時(shí)間，Toast默認(rèn)有LENGTH_SHORT和LENGTH_LONG兩常量，分別表示短時(shí)間顯示和長(zhǎng)時(shí)間顯示。Java代碼makeText(C on text con text, CharSeque nee text, int duratio n)參數(shù)con text和duratio n與第一個(gè)方法相同，參數(shù)t

9、ext可以自己寫消息內(nèi)容。用上面任意方法創(chuàng)建 Toast對(duì)象之后調(diào)用方法show()即可顯示。Java代碼Toast toast = Toast.makeText(ToastDemoActivity.this,這是一個(gè)普通的 Toast!, Toast丄ENGTH_SHORT);toast.show();注意:Toast只能在主線程中顯示，通過Handler來實(shí)現(xiàn).ProgressDialog也是只能在中線程中顯示，但是可以在任意線程中取消ProgressDialog.dismiss().AlterDialog 的使用：要?jiǎng)?chuàng)建一個(gè)如圖所示的窗口，使用setButton。方法：AlertDial

10、og.Builder builder = new AlertDialog.Builder(this);builder.setMessage(Are you sure you want to exit?).setPositiveButt on (Yes, new Dialogl nterface.O nClickListe ne()public void on Click(Dialog In terface dialog, i nt id) MyActivity.this.fi nish();一).setNegativeButt on (No, new Dialog In terface. On

11、 ClickListe ne()public void on Click(Dialog In terface dialog, i nt id) dialog.ca ncel();一);AlertDialog alert = builder.create();首先，使用setMessage(ChaSequenee)為對(duì)話框增加一條消息。 然后，開始連續(xù)調(diào)用方法， 使用setCancelable(boolean)將對(duì)話框設(shè)為不可取消(不 能使用back鍵來取消)。對(duì)每一個(gè)按鈕，使用set.Button()方法，該方法接受按鈕名稱和一個(gè) DialogInterface.OnClickListener

12、 ，該監(jiān)聽器定義了當(dāng)用戶選擇 該按鈕時(shí)應(yīng)做的動(dòng)作。注意：對(duì)每種按鈕類型，只能為 AlertDialog創(chuàng)建一個(gè)。也就是說，一個(gè) AlertDialog不能有兩個(gè)以上的positive按鈕。這使得可能的按 鈕數(shù)量最多為三個(gè)：肯定、否定、中性。這些名字和實(shí)際功能沒有聯(lián)系，但是將幫助你記憶它們各做什么事情。ProgressDialog 的使用：mpDialog = new ProgressDialo g(Test_ProgressDialog.this);mpDialog.setProgressStyle(Progr essDialog.STYLE_SPINNER);設(shè)置風(fēng)格為圓形進(jìn)度條mpDialog.setTitle( 提示);/ 設(shè) 置標(biāo)題mpDialog.setlco n(R.drawable.ico n);/設(shè)置圖標(biāo)mpDialog.setMessage(這是一個(gè)圓 形進(jìn)度條);mpDialog.setI ndeterm in ate(false);/設(shè)置進(jìn)度條是否為不明確mpDialog. setCancelable(