我剛剛得到一個快速的問題。 我試圖通過發送TCP包來與應用程序進行通信,然後服務器將TCP包發送回其他設備。 但是我怎麼能做一個服務,當它通知的設備上收到TCP包時?android發送和接收TCP包
我試過了;
extends Service {
Thread henk;
private static final String TAG = "Service";
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onCreate() {
Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show();
Log.d(TAG, "onCreate");
henk = new Thread(new Runnable(){
public void run() {
// TODO Auto-generated method stub
try {
Boolean end = false;
ServerSocket ss = new ServerSocket(1337);
while(!end){
//Server is waiting for client here, if needed
Socket s = ss.accept();
BufferedReader input = new BufferedReader(new InputStreamReader(s.getInputStream()));
String st = input.readLine();
Log.d("Tcp Example", "From client: "+st);
s.close();
}
ss.close();
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}
@Override
public void onDestroy() {
Toast.makeText(this, "My Service Stopped", Toast.LENGTH_LONG).show();
Log.d(TAG, "onDestroy");
}
@Override
public void onStart(Intent intent, int startid) {
Toast.makeText(this, "My Service Started", Toast.LENGTH_LONG).show();
Log.d(TAG, "onStart");
henk.run();
}
但是,這只是崩潰我的應用程序。 請幫忙嗎?
堆棧跟蹤:
E/ActivityManager( 240): ANR in tictactoe.elqauto
E/ActivityManager( 240): Reason: Executing service tictactoe.elqauto/.servicere
cieve
E/ActivityManager( 240): Load: 7.09/7.29/7.5
E/ActivityManager( 240): CPU usage from 9411ms to 3791ms ago:
E/ActivityManager( 240): 1.2% 3857/de.devmil.minimaltext: 1.1% user + 0.1% ke
rnel/faults: 191 minor
E/ActivityManager( 240): 2.5% 240/system_server: 1.9% user + 0.5% kernel/fa
ults: 20 minor
E/ActivityManager( 240): 0.1% 4797/tiwlan_wq: 0% user + 0.1% kernel
E/ActivityManager( 240): 0% 16322/org.adwfreak.launcher: 0% user + 0% kernel
/faults: 226 minor 1 major
E/ActivityManager( 240): 0% 19108/com.aricent.mtp: 0% user + 0% kernel/faul
ts: 16 minor
E/ActivityManager( 240): 0% 30600/com.google.process.gapps: 0% user + 0% kern
el/faults: 20 minor 5 major
E/ActivityManager( 240): 11% TOTAL: 8% user + 3% kernel + 0.1% iowait
E/ActivityManager( 240): CPU usage from 368ms to 884ms later:
E/ActivityManager( 240): 5.6% 240/system_server: 1.8% user + 3.7% kernel/fa
ults: 15 minor
E/ActivityManager( 240): 5.6% 266/ActivityManager: 1.8% user + 3.7% kernel
E/ActivityManager( 240): 44% TOTAL: 1.9% user + 1.9% kernel + 40% iowait
摘要:
所以我想要做的就是發送一個TCP包一個名稱服務器的服務器將獲得與所屬的IP從數據庫中找到該名稱,並用一些信息發送一個TCP包到它。由於我沒有找到解決方案,我嘗試了套接字,但現在我被卡在接收部分。
我已經這樣做 –
你用過logcat嗎?如果可以的話,當應用程序崩潰時,從logcat發佈堆棧跟蹤:'adb logcat -s *:E'應該在命令行中執行。我的猜測是嘗試從UI線程更新UI,但崩潰輸出肯定會告訴你。 – jarvisteve
@jarvisteve寫棧跟蹤到'/data/anr/traces.txt'但我找不到那個文件? –