我有这个脚本。
我经历了堆栈溢出问题的许多变化，并使用该解决方案尝试建立知识来做到这一点，但似乎每次都失败了，有人可以帮忙吗？
public class Main extends Activity implements OnClickListener {
private EditText value;
private Button btn;
private ProgressBar pb;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
value = (EditText) findViewById(R.id.editText1);
btn = (Button) findViewById(R.id.button1);
pb = (ProgressBar) findViewById(R.id.progressBar1);
pb.setVisibility(View.GONE);
btn.setOnClickListener(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public void onClick(View v) {
// TODO Auto-generated method stub
if (value.getText().toString().length() < 1) {
// out of range
Toast.makeText(this, "please enter something", Toast.LENGTH_LONG)
.show();
} else {
pb.setVisibility(View.VISIBLE);
new MyAsyncTask().execute("hey");
}
}
private class MyAsyncTask extends AsyncTask<String, Integer, Double> {
@Override
protected Double doInBackground(String... params) {
// TODO Auto-generated method stub
postData(params[0]);
return null;
}
protected void onPostExecute(Double result) {
pb.setVisibility(View.GONE);
Toast.makeText(getApplicationContext(), "command sent",
Toast.LENGTH_LONG).show();
}
protected void onProgressUpdate(Integer... progress) {
pb.setProgress(progress[0]);
}
public void postData(String valueIWantToSend) {
// Create a new HttpClient and Post Header
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(
"http://users.aber.ac.uk/bym1/group/androidto.php");
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("myHttpData",
valueIWantToSend));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
} catch (IOException e) {
// TODO Auto-generated catch block
}
}
}
}
我在网上找到了这段代码，我只是想让它工作，所以我有一个工作原型(prototype)可以工作并构建我自己的，但我一直在我的日志文件中得到这个:
01-28 22:30:07.030: W/dalvikvm(27142): threadid=11: thread exiting with uncaught exception (group=0x40bc2498)
01-28 22:30:07.030: E/test(27142): Exception
01-28 22:30:07.060: E/AndroidRuntime(27142): FATAL EXCEPTION: AsyncTask #1
01-28 22:30:07.060: E/AndroidRuntime(27142): java.lang.RuntimeException: An error occured while executing doInBackground()
01-28 22:30:07.060: E/AndroidRuntime(27142): at android.os.AsyncTask$3.done(AsyncTask.java:299)
01-28 22:30:07.060: E/AndroidRuntime(27142): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
01-28 22:30:07.060: E/AndroidRuntime(27142): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
01-28 22:30:07.060: E/AndroidRuntime(27142): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
01-28 22:30:07.060: E/AndroidRuntime(27142): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
01-28 22:30:07.060: E/AndroidRuntime(27142): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
01-28 22:30:07.060: E/AndroidRuntime(27142): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
01-28 22:30:07.060: E/AndroidRuntime(27142): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
01-28 22:30:07.060: E/AndroidRuntime(27142): at java.lang.Thread.run(Thread.java:856)
01-28 22:30:07.060: E/AndroidRuntime(27142): Caused by: java.lang.SecurityException: Permission denied (missing INTERNET permission?)
01-28 22:30:07.060: E/AndroidRuntime(27142): at java.net.InetAddress.lookupHostByName(InetAddress.java:418)
01-28 22:30:07.060: E/AndroidRuntime(27142): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
01-28 22:30:07.060: E/AndroidRuntime(27142): at java.net.InetAddress.getAllByName(InetAddress.java:214)
01-28 22:30:07.060: E/AndroidRuntime(27142): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
01-28 22:30:07.060: E/AndroidRuntime(27142): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
01-28 22:30:07.060: E/AndroidRuntime(27142): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
01-28 22:30:07.060: E/AndroidRuntime(27142): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
01-28 22:30:07.060: E/AndroidRuntime(27142): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
01-28 22:30:07.060: E/AndroidRuntime(27142): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
01-28 22:30:07.060: E/AndroidRuntime(27142): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
01-28 22:30:07.060: E/AndroidRuntime(27142): at com.example.httpasync.Main$MyAsyncTask.postData(Main.java:98)
01-28 22:30:07.060: E/AndroidRuntime(27142): at com.example.httpasync.Main$MyAsyncTask.doInBackground(Main.java:70)
01-28 22:30:07.060: E/AndroidRuntime(27142): at com.example.httpasync.Main$MyAsyncTask.doInBackground(Main.java:1)
01-28 22:30:07.060: E/AndroidRuntime(27142): at android.os.AsyncTask$2.call(AsyncTask.java:287)
01-28 22:30:07.060: E/AndroidRuntime(27142): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
01-28 22:30:07.060: E/AndroidRuntime(27142): ... 5 more
01-28 22:30:07.060: E/AndroidRuntime(27142): Caused by: libcore.io.GaiException: getaddrinfo failed: EAI_NODATA (No address associated with hostname)
01-28 22:30:07.060: E/AndroidRuntime(27142): at libcore.io.Posix.getaddrinfo(Native Method)
01-28 22:30:07.060: E/AndroidRuntime(27142): at libcore.io.ForwardingOs.getaddrinfo(ForwardingOs.java:55)
01-28 22:30:07.060: E/AndroidRuntime(27142): at java.net.InetAddress.lookupHostByName(InetAddress.java:405)
01-28 22:30:07.060: E/AndroidRuntime(27142): ... 19 more
01-28 22:30:07.060: E/AndroidRuntime(27142): Caused by: libcore.io.ErrnoException: getaddrinfo failed: EACCES (Permission denied)
01-28 22:30:07.060: E/AndroidRuntime(27142): ... 22 more
显现
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.httpasync"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.httpasync.Main"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
设置了 Internet 权限，我查找了异常(exception)情况，但答案似乎与我的代码无关，有什么想法吗？
最佳答案
线索在logcat中:
Caused by: java.lang.SecurityException: Permission denied (missing INTERNET permission?)
您的 AndroidManifest 中缺少
android.permission.INTERNET 权限。添加这一行:<uses-permission android:name="android.permission.INTERNET"></uses-permission>
略低于:
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />
关于Android AsyncTask 通过 http Post 发送数据，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/21418349/