我对此非常陌生 - 我添加了一些源代码来实现AsyncTask，但由于在IO线程上运行而不是实现AsyncTask，它仍然强制关闭。我知道我做的事情不对，但我不确定它可能是什么。
JAVA：
import java.io.IOException;
import org.apache.http.client.ClientProtocolException;
import java.util.ArrayList;
import android.os.AsyncTask;
import java.util.List;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.message.BasicNameValuePair;
// import everything you need
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class DeviceConfig extends Activity {
AsyncTask<Object, Object, Object> saveContactTask =
new AsyncTask<Object, Object, Object>()
{
@Override
protected Object doInBackground(Object... params)
{
return null;
}
@Override
protected void onPostExecute(Object result)
{
finish();
}
};
Button sendButton;
EditText msgTextField;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
// load the layout
setContentView(R.layout.deviceconfig);
// make message text field object
msgTextField = (EditText) findViewById(R.id.msgTextField);
// make send button object
sendButton = (Button) findViewById(R.id.sendButton);
}
// this is the function that gets called when you click the button
public void send(View v)
{
// get the message from the message text box
String msg = msgTextField.getText().toString();
// make sure the fields are not empty
if (msg.length()>0)
{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://gamedemo.hostzi.com/test.php");
try {
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("id", "12345"));
nameValuePairs.add(new BasicNameValuePair("message", msg));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
httpclient.execute(httppost);
msgTextField.setText(""); // clear text box
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
} catch (IOException e) {
// TODO Auto-generated catch block
}
}
else
{
// display message if text fields are empty
Toast.makeText(getBaseContext(),"All field are required",Toast.LENGTH_SHORT).show();
}
}
}
XML：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:text="Message"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<EditText
android:id="@+id/msgTextField"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<Button
android:text="Send"
android:id="@+id/sendButton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:onClick="send"
/>
</LinearLayout>
PHP：
<?php
// get the "message" variable from the post request
// this is the data coming from the Android app
$message=$_POST["message"];
// specify the file where we will save the contents of the variable message
$filename="androidmessages.html";
// write (append) the data to the file
file_put_contents($filename,$message."<br />",FILE_APPEND);
// load the contents of the file to a variable
$androidmessages=file_get_contents($filename);
// display the contents of the variable (which has the contents of the file)
echo $androidmessages;
?>
logcat的：
03-27 16:07:05.795: D/dalvikvm(11620): Late-enabling CheckJNI
03-27 16:07:05.935: D/dalvikvm(11620): GC_FOR_ALLOC freed 88K, 3% free 7355K/7568K, paused 18ms, total 19ms
03-27 16:07:05.945: I/dalvikvm-heap(11620): Grow heap (frag case) to 10.818MB for 3686416-byte allocation
03-27 16:07:05.975: D/dalvikvm(11620): GC_FOR_ALLOC freed 1K, 2% free 10953K/11172K, paused 25ms, total 25ms
03-27 16:07:05.995: D/dalvikvm(11620): GC_CONCURRENT freed <1K, 2% free 10953K/11172K, paused 3ms+2ms, total 18ms
03-27 16:07:06.285: D/dalvikvm(11620): GC_FOR_ALLOC freed <1K, 2% free 10953K/11172K, paused 15ms, total 16ms
03-27 16:07:06.305: I/dalvikvm-heap(11620): Grow heap (frag case) to 17.043MB for 6529744-byte allocation
03-27 16:07:06.315: D/dalvikvm(11620): GC_FOR_ALLOC freed 0K, 2% free 17330K/17552K, paused 16ms, total 16ms
03-27 16:07:06.335: D/dalvikvm(11620): GC_CONCURRENT freed <1K, 2% free 17330K/17552K, paused 3ms+2ms, total 21ms
03-27 16:07:06.435: D/libEGL(11620): loaded /system/lib/egl/libEGL_tegra.so
03-27 16:07:06.455: D/libEGL(11620): loaded /system/lib/egl/libGLESv1_CM_tegra.so
03-27 16:07:06.465: D/libEGL(11620): loaded /system/lib/egl/libGLESv2_tegra.so
03-27 16:07:06.485: D/OpenGLRenderer(11620): Enabling debug mode 0
03-27 16:07:19.615: W/IInputConnectionWrapper(11620): showStatusIcon on inactive InputConnection
03-27 16:07:45.695: D/AndroidRuntime(11620): Shutting down VM
03-27 16:07:45.695: W/dalvikvm(11620): threadid=1: thread exiting with uncaught exception (group=0x41cd2930)
03-27 16:07:45.695: E/AndroidRuntime(11620): FATAL EXCEPTION: main
03-27 16:07:45.695: E/AndroidRuntime(11620): java.lang.IllegalStateException: Could not execute method of the activity
03-27 16:07:45.695: E/AndroidRuntime(11620): at android.view.View$1.onClick(View.java:3599)
03-27 16:07:45.695: E/AndroidRuntime(11620): at android.view.View.performClick(View.java:4204)
03-27 16:07:45.695: E/AndroidRuntime(11620): at android.view.View$PerformClick.run(View.java:17355)
03-27 16:07:45.695: E/AndroidRuntime(11620): at android.os.Handler.handleCallback(Handler.java:725)
03-27 16:07:45.695: E/AndroidRuntime(11620): at android.os.Handler.dispatchMessage(Handler.java:92)
03-27 16:07:45.695: E/AndroidRuntime(11620): at android.os.Looper.loop(Looper.java:137)
03-27 16:07:45.695: E/AndroidRuntime(11620): at android.app.ActivityThread.main(ActivityThread.java:5041)
03-27 16:07:45.695: E/AndroidRuntime(11620): at java.lang.reflect.Method.invokeNative(Native Method)
03-27 16:07:45.695: E/AndroidRuntime(11620): at java.lang.reflect.Method.invoke(Method.java:511)
03-27 16:07:45.695: E/AndroidRuntime(11620): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
03-27 16:07:45.695: E/AndroidRuntime(11620): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
03-27 16:07:45.695: E/AndroidRuntime(11620): at dalvik.system.NativeStart.main(Native Method)
03-27 16:07:45.695: E/AndroidRuntime(11620): Caused by: java.lang.reflect.InvocationTargetException
03-27 16:07:45.695: E/AndroidRuntime(11620): at java.lang.reflect.Method.invokeNative(Native Method)
03-27 16:07:45.695: E/AndroidRuntime(11620): at java.lang.reflect.Method.invoke(Method.java:511)
03-27 16:07:45.695: E/AndroidRuntime(11620): at android.view.View$1.onClick(View.java:3594)
03-27 16:07:45.695: E/AndroidRuntime(11620): ... 11 more
03-27 16:07:45.695: E/AndroidRuntime(11620): Caused by: android.os.NetworkOnMainThreadException
03-27 16:07:45.695: E/AndroidRuntime(11620): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
03-27 16:07:45.695: E/AndroidRuntime(11620): at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
03-27 16:07:45.695: E/AndroidRuntime(11620): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
03-27 16:07:45.695: E/AndroidRuntime(11620): at java.net.InetAddress.getAllByName(InetAddress.java:214)
03-27 16:07:45.695: E/AndroidRuntime(11620): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
03-27 16:07:45.695: E/AndroidRuntime(11620): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
03-27 16:07:45.695: E/AndroidRuntime(11620): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
03-27 16:07:45.695: E/AndroidRuntime(11620): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
03-27 16:07:45.695: E/AndroidRuntime(11620): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
03-27 16:07:45.695: E/AndroidRuntime(11620): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
03-27 16:07:45.695: E/AndroidRuntime(11620): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
03-27 16:07:45.695: E/AndroidRuntime(11620): at com.nfc.linkingmanager.DeviceConfig.send(DeviceConfig.java:84)
03-27 16:07:45.695: E/AndroidRuntime(11620): ... 14 more
答案 0 :(得分：3)
您需要将HttpClient内容移动到AsyncTask中，因为您无法在主线程上进行网络调用。
此外，您不是在调用saveContactTask.execute（）。在onPostExecute（）中，我认为你不想调用finish（），因为这会杀死你的活动。
答案 1 :(得分：0)
你永远不会调用saveContactTask.execute（）。这是我肯定看到的一件事。需要在doInBackground（）中调用send。需要在单击按钮时调用saveContactTask.execute（）。