我正在尝试学习如何使用AsyncTask类来验证其帐户存储在远程服务器和数据库上的用户。
我正在从一个例子开始工作，到目前为止我有这个代码：
package com.problemio;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import android.app.Activity;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class LoginActivity extends Activity
{
private TextView textView;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
// Show form for login_email
final EditText loginEmail = (EditText) findViewById(R.id.login_email);
String name = loginEmail.getText().toString();
// Show field for password
final EditText password = (EditText) findViewById(R.id.password);
String text = password.getText().toString();
// Show button for submit
Button submit = (Button)findViewById(R.id.submit);
// Show options for create-profile and forgot-password
submit.setOnClickListener(new Button.OnClickListener()
{
public void onClick(View v)
{
String email = loginEmail.getText().toString();
String pass = password.getText().toString();
sendFeedback(pass, email);
}
});
}
public void sendFeedback(String pass , String email)
{
Log.d( "1" , pass );
Log.d( "1" , email );
// Go to db and check if these r legit
// How do I do that? :)
ArrayList<NameValuePair> postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("username", email ));
postParameters.add(new BasicNameValuePair("password", pass ));
}
private class DownloadWebPageTask extends AsyncTask<String, Void, String>
{
@Override
protected String doInBackground(String... urls)
{
Log.d( "Inner class: " , "Doing stuff in background" );
String response = "";
for (String url : urls) {
DefaultHttpClient client = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(url);
try {
HttpResponse execute = client.execute(httpGet);
InputStream content = execute.getEntity().getContent();
BufferedReader buffer = new BufferedReader(
new InputStreamReader(content));
String s = "";
while ((s = buffer.readLine()) != null) {
response += s;
}
} catch (Exception e) {
e.printStackTrace();
}
}
return response;
}
@Override
protected void onPostExecute(String result)
{
textView.setText(result);
}
}
public void readWebpage(View view)
{
DownloadWebPageTask task = new DownloadWebPageTask();
task.execute(new String[] { "http://www.myurl.com" });
}
}
我在LogCat中遇到了一些错误：
02-23 10:51:45.587: D/AndroidRuntime(1670): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<
02-23 10:51:45.587: D/AndroidRuntime(1670): CheckJNI is ON
02-23 10:51:47.037: D/AndroidRuntime(1670): Calling main entry com.android.commands.pm.Pm
02-23 10:51:47.118: W/ActivityManager(1180): No content provider found for permission revoke: file:///data/local/tmp/Problemio.apk
02-23 10:51:47.267: W/ActivityManager(1180): No content provider found for permission revoke: file:///data/local/tmp/Problemio.apk
02-23 10:51:47.467: I/PackageManager(1180): Removing non-system package:com.problemio
02-23 10:51:47.467: I/ActivityManager(1180): Force stopping package com.problemio uid=10041
02-23 10:51:47.467: I/ActivityManager(1180): Killing proc 1648:com.problemio/10041: force stop
02-23 10:51:47.477: W/ActivityManager(1180): Force removing ActivityRecord{4147f5d0 com.problemio/.LoginActivity}: app died, no saved state
02-23 10:51:47.518: I/ActivityManager(1180): Force finishing activity ActivityRecord{413e9e98 com.problemio/.ProblemioActivity}
02-23 10:51:47.587: W/InputDispatcher(1180): channel '4160fcd8 com.problemio/com.problemio.ProblemioActivity (server)' ~ Consumer closed input channel or an error occurred. events=0x8
02-23 10:51:47.587: E/InputDispatcher(1180): channel '4160fcd8 com.problemio/com.problemio.ProblemioActivity (server)' ~ Channel is unrecoverably broken and will be disposed!
02-23 10:51:47.607: I/WindowManager(1180): WIN DEATH: Window{416096c0 com.problemio/com.problemio.LoginActivity paused=false}
02-23 10:51:47.637: I/WindowManager(1180): WIN DEATH: Window{4160fcd8 com.problemio/com.problemio.ProblemioActivity paused=true}
02-23 10:51:47.637: W/InputDispatcher(1180): Attempted to unregister already unregistered input channel '4160fcd8 com.problemio/com.problemio.ProblemioActivity (server)'
02-23 10:51:47.667: I/WindowManager(1180): WINDOW DIED Window{4160fcd8 com.problemio/com.problemio.ProblemioActivity paused=true}
02-23 10:51:47.707: E/InputDispatcher(1180): Received spurious receive callback for unknown input channel. fd=206, events=0x8
02-23 10:51:48.157: D/dalvikvm(1180): GC_CONCURRENT freed 527K, 9% free 12067K/13255K, paused 10ms+43ms
02-23 10:51:48.587: W/NetworkManagementSocketTagger(1180): setKernelCountSet(10041, 0) failed with errno -2
02-23 10:51:48.587: W/NetworkManagementSocketTagger(1180): setKernelCountSet(10009, 1) failed with errno -2
02-23 10:51:48.598: I/PackageManager(1180): Package com.problemio codePath changed from /data/app/com.problemio-1.apk to /data/app/com.problemio-2.apk; Retaining data and using new
02-23 10:51:48.667: I/PackageManager(1180): Running dexopt on: com.problemio
02-23 10:51:49.247: D/dalvikvm(1681): DexOpt: load 54ms, verify+opt 86ms
02-23 10:51:49.307: W/PackageManager(1180): Code path for pkg : com.problemio changing from /data/app/com.problemio-1.apk to /data/app/com.problemio-2.apk
02-23 10:51:49.317: W/PackageManager(1180): Resource path for pkg : com.problemio changing from /data/app/com.problemio-1.apk to /data/app/com.problemio-2.apk
02-23 10:51:49.327: I/ActivityManager(1180): Force stopping package com.problemio uid=10041
02-23 10:51:49.517: D/PackageManager(1180): New package installed in /data/app/com.problemio-2.apk
02-23 10:51:49.808: I/ActivityManager(1180): Force stopping package com.problemio uid=10041
02-23 10:51:49.997: D/dalvikvm(1275): GC_EXPLICIT freed 235K, 6% free 11344K/12039K, paused 5ms+13ms
02-23 10:51:50.177: D/dalvikvm(1341): GC_EXPLICIT freed 168K, 4% free 9389K/9735K, paused 105ms+9ms
02-23 10:51:50.646: D/dalvikvm(1180): GC_EXPLICIT freed 448K, 10% free 12001K/13255K, paused 83ms+18ms
02-23 10:51:50.728: D/PackageManager(1180): generateServicesMap(android.accounts.AccountAuthenticator): 2 services unchanged
02-23 10:51:50.897: D/PackageManager(1180): generateServicesMap(android.content.SyncAdapter): 4 services unchanged
02-23 10:51:50.929: D/BackupManagerService(1180): Received broadcast Intent { act=android.intent.action.PACKAGE_REMOVED dat=package:com.problemio flg=0x10000010 (has extras) }
02-23 10:51:51.047: I/AccountTypeManager(1408): Loaded meta-data for 1 account types, 0 accounts in 647ms(wall) 12ms(cpu)
02-23 10:51:51.117: D/PackageManager(1180): generateServicesMap(android.accounts.AccountAuthenticator): 2 services unchanged
02-23 10:51:51.217: D/PackageManager(1180): generateServicesMap(android.content.SyncAdapter): 4 services unchanged
02-23 10:51:51.357: D/BackupManagerService(1180): Received broadcast Intent { act=android.intent.action.PACKAGE_ADDED dat=package:com.problemio flg=0x10000010 (has extras) }
02-23 10:51:51.357: V/BackupManagerService(1180): updatePackageParticipantsLocked: com.problemio
02-23 10:51:51.697: W/RecognitionManagerService(1180): no available voice recognition services found
02-23 10:51:52.817: I/AccountTypeManager(1408): Loaded meta-data for 1 account types, 0 accounts in 45ms(wall) 15ms(cpu)
02-23 10:51:52.919: D/BackupManagerService(1180): Received broadcast Intent { act=android.intent.action.PACKAGE_REPLACED dat=package:com.problemio flg=0x10000010 (has extras) }
02-23 10:51:52.940: V/BackupManagerService(1180): updatePackageParticipantsLocked: com.problemio
02-23 10:51:53.977: D/dalvikvm(1180): GC_EXPLICIT freed 604K, 10% free 12042K/13255K, paused 8ms+129ms
02-23 10:51:54.157: D/AndroidRuntime(1670): Shutting down VM
02-23 10:51:54.177: D/dalvikvm(1670): GC_CONCURRENT freed 101K, 78% free 456K/2048K, paused 1ms+1ms
02-23 10:51:54.187: D/jdwp(1670): Got wake-up signal, bailing out of select
02-23 10:51:54.187: D/dalvikvm(1670): Debugger has detached; object registry had 1 entries
02-23 10:51:54.197: I/AndroidRuntime(1670): NOTE: attach of thread 'Binder Thread #3' failed
02-23 10:51:55.077: D/AndroidRuntime(1689): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<
02-23 10:51:55.077: D/AndroidRuntime(1689): CheckJNI is ON
02-23 10:51:56.267: D/AndroidRuntime(1689): Calling main entry com.android.commands.am.Am
02-23 10:51:56.317: I/ActivityManager(1180): START {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.problemio/.ProblemioActivity} from pid 1689
02-23 10:51:56.347: W/WindowManager(1180): Failure taking screenshot for (180x300) to layer 21000
02-23 10:51:56.417: D/AndroidRuntime(1689): Shutting down VM
02-23 10:51:56.447: D/dalvikvm(1699): Not late-enabling CheckJNI (already on)
02-23 10:51:56.447: I/AndroidRuntime(1689): NOTE: attach of thread 'Binder Thread #3' failed
02-23 10:51:56.457: D/dalvikvm(1689): GC_CONCURRENT freed 101K, 77% free 485K/2048K, paused 1ms+3ms
02-23 10:51:56.457: D/jdwp(1689): Got wake-up signal, bailing out of select
02-23 10:51:56.467: D/dalvikvm(1689): Debugger has detached; object registry had 1 entries
02-23 10:51:56.517: I/ActivityManager(1180): Start proc com.problemio for activity com.problemio/.ProblemioActivity: pid=1699 uid=10041 gids={3003}
02-23 10:51:56.977: W/NetworkManagementSocketTagger(1180): setKernelCountSet(10041, 1) failed with errno -2
02-23 10:51:57.087: I/ActivityManager(1180): START {cmp=com.problemio/.LoginActivity} from pid 1699
02-23 10:51:57.606: D/gralloc_goldfish(1699): Emulator without GPU emulation detected.
02-23 10:51:58.047: E/ActivityThread(1435): Failed to find provider info for com.android.inputmethod.latin.dictionarypack
02-23 10:51:58.117: E/BinaryDictionaryGetter(1435): Could not find a dictionary pack
02-23 10:51:58.207: I/ActivityManager(1180): Displayed com.problemio/.LoginActivity: +916ms (total +1s823ms)
02-23 10:51:58.237: I/ActivityManager(1180): Displayed com.problemio/.ProblemioActivity: +1s854ms
02-23 10:51:58.427: W/NetworkManagementSocketTagger(1180): setKernelCountSet(10009, 0) failed with errno -2
02-23 10:51:58.868: E/ActivityThread(1435): Failed to find provider info for com.android.inputmethod.latin.dictionarypack
02-23 10:51:58.886: E/BinaryDictionaryGetter(1435): Could not find a dictionary pack
02-23 10:53:59.657: W/SoundPool(1180): sample 0 not READY
02-23 10:53:59.748: D/PhoneStatusBar(1233): disable: < expand icons alerts ticker system_info BACK HOME recent* CLOCK >
02-23 10:54:00.097: I/ARMAssembler(35): generated scanline__00000077:03515104_00009002_00000000 [127 ipp] (149 ins) at [0x419dea80:0x419decd4] in 2956444 ns
02-23 10:54:00.117: D/PhoneStatusBar(1233): disable: < expand icons alerts ticker system_info back* home* recent clock* >
02-23 10:54:03.086: D/1(1699): Please enter your password
02-23 10:54:03.086: D/1(1699): Plase enter your login email address
02-23 10:54:41.017: A/BatteryStatsImpl(1180): problem reading network stats
02-23 10:54:41.017: A/BatteryStatsImpl(1180): java.lang.IllegalStateException: problem parsing idx 1
02-23 10:54:41.017: A/BatteryStatsImpl(1180): at com.android.internal.net.NetworkStatsFactory.readNetworkStatsDetail(NetworkStatsFactory.java:300)
02-23 10:54:41.017: A/BatteryStatsImpl(1180): at com.android.internal.net.NetworkStatsFactory.readNetworkStatsDetail(NetworkStatsFactory.java:250)
02-23 10:54:41.017: A/BatteryStatsImpl(1180): at com.android.internal.os.BatteryStatsImpl.getNetworkStatsDetailGroupedByUid(BatteryStatsImpl.java:5734)
02-23 10:54:41.017: A/BatteryStatsImpl(1180): at com.android.internal.os.BatteryStatsImpl.access$100(BatteryStatsImpl.java:76)
02-23 10:54:41.017: A/BatteryStatsImpl(1180): at com.android.internal.os.BatteryStatsImpl$Uid.computeCurrentTcpBytesReceived(BatteryStatsImpl.java:2457)
02-23 10:54:41.017: A/BatteryStatsImpl(1180): at com.android.internal.os.BatteryStatsImpl$Uid.getTcpBytesReceived(BatteryStatsImpl.java:2446)
02-23 10:54:41.017: A/BatteryStatsImpl(1180): at com.android.internal.os.BatteryStatsImpl.writeSummaryToParcel(BatteryStatsImpl.java:5437)
02-23 10:54:41.017: A/BatteryStatsImpl(1180): at com.android.internal.os.BatteryStatsImpl.writeLocked(BatteryStatsImpl.java:4836)
02-23 10:54:41.017: A/BatteryStatsImpl(1180): at com.android.internal.os.BatteryStatsImpl.writeAsyncLocked(BatteryStatsImpl.java:4818)
02-23 10:54:41.017: A/BatteryStatsImpl(1180): at com.android.server.am.ActivityManagerService.updateCpuStatsNow(ActivityManagerService.java:1649)
02-23 10:54:41.017: A/BatteryStatsImpl(1180): at com.android.server.am.ActivityManagerService$3.run(ActivityManagerService.java:1531)
02-23 10:54:41.017: A/BatteryStatsImpl(1180): Caused by: java.io.FileNotFoundException: /proc/net/xt_qtaguid/stats: open failed: ENOENT (No such file or directory)
02-23 10:54:41.017: A/BatteryStatsImpl(1180): at libcore.io.IoBridge.open(IoBridge.java:406)
02-23 10:54:41.017: A/BatteryStatsImpl(1180): at java.io.FileInputStream.<init>(FileInputStream.java:78)
02-23 10:54:41.017: A/BatteryStatsImpl(1180): at com.android.internal.net.NetworkStatsFactory.readNetworkStatsDetail(NetworkStatsFactory.java:269)
02-23 10:54:41.017: A/BatteryStatsImpl(1180): ... 10 more
02-23 10:54:41.017: A/BatteryStatsImpl(1180): Caused by: libcore.io.ErrnoException: open failed: ENOENT (No such file or directory)
02-23 10:54:41.017: A/BatteryStatsImpl(1180): at libcore.io.Posix.open(Native Method)
02-23 10:54:41.017: A/BatteryStatsImpl(1180): at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110)
02-23 10:54:41.017: A/BatteryStatsImpl(1180): at libcore.io.IoBridge.open(IoBridge.java:390)
02-23 10:54:41.017: A/BatteryStatsImpl(1180): ... 12 more
02-23 10:55:09.777: D/dalvikvm(1261): GC_CONCURRENT freed 384K, 6% free 9529K/10119K, paused 8ms+9ms
02-23 10:56:33.198: W/ThrottleService(1180): unable to find stats for iface rmnet0
02-23 11:00:46.967: A/NetworkStats(1180): problem reading network stats
02-23 11:00:46.967: A/NetworkStats(1180): java.lang.IllegalStateException: problem parsing idx 1
02-23 11:00:46.967: A/NetworkStats(1180): at com.android.internal.net.NetworkStatsFactory.readNetworkStatsDetail(NetworkStatsFactory.java:300)
02-23 11:00:46.967: A/NetworkStats(1180): at com.android.server.NetworkManagementService.getNetworkStatsUidDetail(NetworkManagementService.java:1282)
02-23 11:00:46.967: A/NetworkStats(1180): at com.android.server.net.NetworkStatsService.performPollLocked(NetworkStatsService.java:831)
02-23 11:00:46.967: A/NetworkStats(1180): at com.android.server.net.NetworkStatsService.performPoll(NetworkStatsService.java:799)
02-23 11:00:46.967: A/NetworkStats(1180): at com.android.server.net.NetworkStatsService.access$100(NetworkStatsService.java:128)
02-23 11:00:46.967: A/NetworkStats(1180): at com.android.server.net.NetworkStatsService$3.onReceive(NetworkStatsService.java:633)
02-23 11:00:46.967: A/NetworkStats(1180): at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:728)
02-23 11:00:46.967: A/NetworkStats(1180): at android.os.Handler.handleCallback(Handler.java:605)
02-23 11:00:46.967: A/NetworkStats(1180): at android.os.Handler.dispatchMessage(Handler.java:92)
02-23 11:00:46.967: A/NetworkStats(1180): at android.os.Looper.loop(Looper.java:137)
02-23 11:00:46.967: A/NetworkStats(1180): at android.os.HandlerThread.run(HandlerThread.java:60)
02-23 11:00:46.967: A/NetworkStats(1180): Caused by: java.io.FileNotFoundException: /proc/net/xt_qtaguid/stats: open failed: ENOENT (No such file or directory)
02-23 11:00:46.967: A/NetworkStats(1180): at libcore.io.IoBridge.open(IoBridge.java:406)
02-23 11:00:46.967: A/NetworkStats(1180): at java.io.FileInputStream.<init>(FileInputStream.java:78)
02-23 11:00:46.967: A/NetworkStats(1180): at com.android.internal.net.NetworkStatsFactory.readNetworkStatsDetail(NetworkStatsFactory.java:269)
02-23 11:00:46.967: A/NetworkStats(1180): ... 10 more
02-23 11:00:46.967: A/NetworkStats(1180): Caused by: libcore.io.ErrnoException: open failed: ENOENT (No such file or directory)
02-23 11:00:46.967: A/NetworkStats(1180): at libcore.io.Posix.open(Native Method)
02-23 11:00:46.967: A/NetworkStats(1180): at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110)
02-23 11:00:46.967: A/NetworkStats(1180): at libcore.io.IoBridge.open(IoBridge.java:390)
02-23 11:00:46.967: A/NetworkStats(1180): ... 12 more
02-23 11:01:00.456: D/dalvikvm(1180): GC_CONCURRENT freed 632K, 10% free 12039K/13255K, paused 10ms+15ms
02-23 11:02:33.617: D/dalvikvm(1261): GC_CONCURRENT freed 384K, 6% free 9529K/10119K, paused 24ms+7ms
02-23 11:06:33.266: W/ThrottleService(1180): unable to find stats for iface rmnet0
我不太确定这意味着什么：）
但是我在服务器日志中看到网址没有被点击，这是重要的部分，这意味着这段代码最终没有向我的auth服务器发出请求。知道这里出了什么问题吗？
谢谢！
答案 0 :(得分：2)
在sendFeedback(...)方法中执行类似的操作......
public void sendFeedback(String pass , String email)
{
Log.d( "1" , pass );
Log.d( "1" , email );
String[] params = new String[] { "http://www.myurl.com", email, pass };
DownloadWebPageTask task = new DownloadWebPageTask();
task.execute(params);
}
然后在doInBackground(...)的{{1}}方法中，您可以像这样检索它们......
AsncTask您还需要使用private class DownloadWebPageTask extends AsyncTask<String, Void, String>
{
@Override
protected String doInBackground(String... theParams)
{
String myUrl = theParams[0];
String myEmail = theParams[1];
String myPassword = theParams[2];
ArrayList<NameValuePair> postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("username", myEmail ));
postParameters.add(new BasicNameValuePair("password", myPassword ));
...
}
}
而不是HttpPost。