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以下代碼應訪問讀取XML並在佈局中顯示它的網站。 不知何故是不是在我的Android上工作，而在模擬器上它工作正常。 有人能告訴我爲什麼它不工作，我應該怎麼做才能糾正它？HttpSocket無法在我的Android設備上工作
的Java：
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void connect (View v){
TextView mTextView = (TextView) findViewById(R.id.textView1);
try {
Socket mySocket = new Socket("www.ynet.co.il", 80);
InputStream in = mySocket.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String line = "";
String output = "";
while ((line = reader.readLine()) != null) {
output += line;
}
mTextView.setText(output);
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void good (View v){
TextView mTextView = (TextView) findViewById(R.id.textView1);
HttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet("http://www.boi.org.il/currency.xml?curr=01");
try {
HttpResponse response = client.execute(request);
HttpEntity entity = response.getEntity();
InputStreamReader in = new InputStreamReader(entity.getContent());
BufferedReader reader = new BufferedReader(in);
String line = "";
String output = "";
while ((line = reader.readLine()) != null) {
output += line;
if (line.contains("RATE")) {
StringTokenizer tokens = new StringTokenizer(line,"><");
String token = tokens.nextToken();
String token1 = tokens.nextToken();
String token2 = tokens.nextToken();
mTextView.setText("The USD/ILS Rate is: "+token2);
}
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
這是logcat的：
02-17 17:55:39.165: D/dalvikvm(14064): Late-enabling CheckJNI
02-17 17:55:39.225: I/dalvikvm(14064): Turning on JNI app bug workarounds for target SDK version 10...
02-17 17:55:39.280: W/ActivityThread(14064): Application com.example.httpsocket can be debugged on port 8100...
02-17 17:55:40.905: D/AndroidRuntime(14064): Shutting down VM
02-17 17:55:40.905: W/dalvikvm(14064): threadid=1: thread exiting with uncaught exception (group=0x410ed2a0)
02-17 17:55:40.935: E/AndroidRuntime(14064): FATAL EXCEPTION: main
02-17 17:55:40.935: E/AndroidRuntime(14064): java.lang.IllegalStateException: Could not execute method of the activity
02-17 17:55:40.935: E/AndroidRuntime(14064): at android.view.View$1.onClick(View.java:3691)
02-17 17:55:40.935: E/AndroidRuntime(14064): at android.view.View.performClick(View.java:4211)
02-17 17:55:40.935: E/AndroidRuntime(14064): at android.view.View$PerformClick.run(View.java:17267)
02-17 17:55:40.935: E/AndroidRuntime(14064): at android.os.Handler.handleCallback(Handler.java:615)
02-17 17:55:40.935: E/AndroidRuntime(14064): at android.os.Handler.dispatchMessage(Handler.java:92)
02-17 17:55:40.935: E/AndroidRuntime(14064): at android.os.Looper.loop(Looper.java:137)
02-17 17:55:40.935: E/AndroidRuntime(14064): at android.app.ActivityThread.main(ActivityThread.java:4898)
02-17 17:55:40.935: E/AndroidRuntime(14064): at java.lang.reflect.Method.invokeNative(Native Method)
02-17 17:55:40.935: E/AndroidRuntime(14064): at java.lang.reflect.Method.invoke(Method.java:511)
02-17 17:55:40.935: E/AndroidRuntime(14064): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
02-17 17:55:40.935: E/AndroidRuntime(14064): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
02-17 17:55:40.935: E/AndroidRuntime(14064): at dalvik.system.NativeStart.main(Native Method)
02-17 17:55:40.935: E/AndroidRuntime(14064): Caused by: java.lang.reflect.InvocationTargetException
02-17 17:55:40.935: E/AndroidRuntime(14064): at java.lang.reflect.Method.invokeNative(Native Method)
02-17 17:55:40.935: E/AndroidRuntime(14064): at java.lang.reflect.Method.invoke(Method.java:511)
02-17 17:55:40.935: E/AndroidRuntime(14064): at android.view.View$1.onClick(View.java:3686)
02-17 17:55:40.935: E/AndroidRuntime(14064): ... 11 more
02-17 17:55:40.935: E/AndroidRuntime(14064): Caused by: android.os.NetworkOnMainThreadException
02-17 17:55:40.935: E/AndroidRuntime(14064): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1118)
02-17 17:55:40.935: E/AndroidRuntime(14064): at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
02-17 17:55:40.935: E/AndroidRuntime(14064): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
02-17 17:55:40.935: E/AndroidRuntime(14064): at java.net.InetAddress.getAllByName(InetAddress.java:214)
02-17 17:55:40.935: E/AndroidRuntime(14064): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
02-17 17:55:40.935: E/AndroidRuntime(14064): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
02-17 17:55:40.935: E/AndroidRuntime(14064): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
02-17 17:55:40.935: E/AndroidRuntime(14064): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
02-17 17:55:40.935: E/AndroidRuntime(14064): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:670)
02-17 17:55:40.935: E/AndroidRuntime(14064): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:509)
02-17 17:55:40.935: E/AndroidRuntime(14064): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
02-17 17:55:40.935: E/AndroidRuntime(14064): at com.example.httpsocket.MainActivity.good(MainActivity.java:63)
02-17 17:55:40.935: E/AndroidRuntime(14064): ... 14 more