我的活动包含EditText和Button。现在，当按下按钮时，EditText中的文本应转换为String并放入要执行的URL中。
我的链接：＆＃34; http://necrecords.16mb.com/complaints.php?username=＆＃34; + String;
当我在浏览器中运行上述链接时，我的数据库已成功更新。但是当我在我的Activity中使用它时（按下按钮时），应用程序崩溃了。我在Manifest中添加了Internet权限，但仍然没有结果。在成功执行上述链接后，它什么都不返回。我只是希望链接被执行，我不想要链接的任何结果。
ReportActivity.java
package com.example.telugump3;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import android.app.Activity;
import android.app.ProgressDialog;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
public class ReportActivity extends Activity{
EditText et;
String mname;
HttpPost httppost;
StringBuffer buffer;
HttpResponse response;
HttpClient httpclient;
ProgressDialog pd;
CustomAdapter adapter;
ListView listProduct;
ArrayList<String> records;
Button btn;
String query;
String name;
String id;
BufferedReader in;
String result=null;
String line=null;
int code;
String mylink;
HttpClient httpClient;
HttpPost httpPost;
List<NameValuePair> nameValuePair;
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.report_activity);
et = (EditText)findViewById(R.id.myedit);
btn =(Button)findViewById(R.id.mybutton);
mname = et.getText().toString();
// show response on the EditText etResponse
try {
query = URLEncoder.encode(mname, "utf-8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mylink = "http://necrecords.16mb.com/complaints.php?username="+query;
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v){
GET(mylink);
}
});
}
public static String GET(String url){
InputStream inputStream = null;
String result = "";
try {
// create HttpClient
HttpClient httpclient = new DefaultHttpClient();
// make GET request to the given URL
HttpResponse httpResponse = httpclient.execute(new HttpGet(url));
// receive response as inputStream
inputStream = httpResponse.getEntity().getContent();
// convert inputstream to string
if(inputStream != null)
result = convertInputStreamToString(inputStream);
else
result = "Did not work!";
} catch (Exception e) {
Log.d("InputStream", e.getLocalizedMessage());
}
return result;
}
// convert inputstream to String
private static String convertInputStreamToString(InputStream inputStream) throws IOException{
BufferedReader bufferedReader = new BufferedReader( new InputStreamReader(inputStream));
String line = "";
String result = "";
while((line = bufferedReader.readLine()) != null)
result += line;
inputStream.close();
return result;
}
// check network connection
public boolean isConnected(){
ConnectivityManager connMgr = (ConnectivityManager) getSystemService(this.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
if (networkInfo != null && networkInfo.isConnected())
return true;
else
return false;
}
}
logcat的
04-05 20:12:33.948: I/ActivityManager(561): START u0 {cmp=com.example.telugump3/.ReportActivity} from pid 8737
04-05 20:12:34.128: I/ActivityManager(561): Displayed com.example.telugump3/.ReportActivity: +153ms
04-05 20:12:38.448: E/AndroidRuntime(8737): Process: com.example.telugump3, PID: 8737
04-05 20:12:38.448: E/AndroidRuntime(8737): at com.example.telugump3.ReportActivity.GET(ReportActivity.java:111)
04-05 20:12:38.448: E/AndroidRuntime(8737): at com.example.telugump3.ReportActivity$1.onClick(ReportActivity.java:82)
04-05 20:12:38.458: W/ActivityManager(561): Force finishing activity com.example.telugump3/.ReportActivity
04-05 20:12:38.968: W/ActivityManager(561): Activity pause timeout for ActivityRecord{21d2c7c8 u0 com.example.telugump3/.ReportActivity id=0 t227 f}
04-05 20:12:40.068: W/InputDispatcher(561): channel '22878c88 com.example.telugump3/com.example.telugump3.MainActivity (server)' ~ Consumer closed input channel or an error occurred. events=0x9
04-05 20:12:40.068: E/InputDispatcher(561): channel '22878c88 com.example.telugump3/com.example.telugump3.MainActivity (server)' ~ Channel is unrecoverably broken and will be disposed!
04-05 20:12:40.068: W/InputDispatcher(561): Attempted to unregister already unregistered input channel '22878c88 com.example.telugump3/com.example.telugump3.MainActivity (server)'
04-05 20:12:40.068: I/WindowState(561): WIN DEATH: Window{222ac998 u0 id=0 com.example.telugump3/com.example.telugump3.ReportActivity}
04-05 20:12:40.068: I/ActivityManager(561): Process com.example.telugump3 (pid 8737) has died.
04-05 20:12:40.068: I/WindowState(561): WIN DEATH: Window{22878c88 u0 id=0 com.example.telugump3/com.example.telugump3.MainActivity}
04-05 20:12:40.088: D/dalvikvm(8817): Process 8817 nice name: com.example.telugump3
04-05 20:12:40.088: I/ActivityManager(561): Start proc com.example.telugump3 for activity com.example.telugump3/.MainActivity: pid=8817 uid=10255 gids={50255, 3003, 1028, 1015}
04-05 20:12:40.348: I/ActivityManager(561): Displayed com.example.telugump3/.MainActivity: +277ms
答案 0 :(得分：2)
您需要修改btn OnClick并在AsyncTask类中执行链接。请尝试以下方法。如果遗漏了什么，请告诉我。
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.report_activity);
et = (EditText)findViewById(R.id.myedit);
btn =(Button)findViewById(R.id.mybutton);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v){
mname = et.getText().toString();
// show response on the EditText etResponse
try {
query = URLEncoder.encode(mname, "utf-8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mylink = "http://necrecords.16mb.com/complaints.php?username="+query;
HttpAsyncTask hat = new HttpAsyncTask();
hat.execute(mylink);
}
});
}
private class HttpAsyncTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... urls) {
return httpRequestResponse(urls[0]);
}
// onPostExecute displays the results of the AsyncTask.
@Override
protected void onPostExecute(String result) {
}
}
//For HttpAsync Functions: sending requests and receiving responses
public static String httpRequestResponse(String url){
InputStream inputStream = null;
String result = "";
try {
// create HttpClient
HttpClient httpclient = new DefaultHttpClient();
// make GET request to the given URL
HttpResponse httpResponse = httpclient.execute(new HttpGet(url));
// receive response as inputStream
inputStream = httpResponse.getEntity().getContent();
// convert InputStream to string
if(inputStream != null)
result = convertInputStreamToString(inputStream);
else
result = "InputStream did not work";
} catch (Exception e) {
Log.d("InputStream", e.getLocalizedMessage());
}
return result;
}
private static String convertInputStreamToString(InputStream inputStream) throws IOException{
BufferedReader bufferedReader = new BufferedReader( new InputStreamReader(inputStream));
String line = "";
String result = "";
while((line = bufferedReader.readLine()) != null)
result += line;
inputStream.close();
return result;
}