【求助】android程序“已经停止运行“”……

例如
new Thread(new Runnable() {
@Override
public void run() {
Map<String, String> params = new HashMap<String, String>();
params.put("username", username); }
}).start();

还没打完,不小心提交了
例如
string text=null;
new Thread(new Runnable() {
@Override
public void run() {
                    Map<String, String> params = new HashMap<String, String>();
                    params.put("username", username);
                    text=HttpUtils.submitPostData(params, "utf-8")}
}).start();
//在子线程外提示
Toast toast = Toast.makeText(LocationActivity.this, text, Toast.LENGTH_SHORT).show();

不能在UI线程里访问网络，而且submitPostData返回的值也要注意线程同步，所以只用new Thread来处理也不正确，用Handler来处理没有问题，但是比较繁琐。
最合适的方式是用AsyncTask处理：public void onClick(View v)
{
if (!mLocationClient.isStarted()) {
return;
}
String username = LocationResult.getText().toString();
new AsyncTask<String, Void, String>() {
@Override
public String doInBackground(String... strs) {
String username = strs[0];
Map<String, String> params = new HashMap<String, String>();
params.put("username", username);
return HttpUtils.submitPostData(params, "utf-8");
}
@Override
public void onPostExecute(String result) {
Toast toast = Toast.makeText(LocationActivity.this, result);
toast.show();
}
}.execute(username);
}

你的方法可以正确的得到返回值了  但是返回的只是我那个网页处理的源代码的，并没有返回处理后的数据啊……
返回的是这个<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>用户登录界面</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<meta http-equiv="content-type" content="text/html; charset=gb2312">  </head>

  <body>
    <form action="rets" method="post">
   用户id：<input type="text" size=20 name="username">
   <br>            
    <input type="submit" value="提交">
    </form>
  </body>
</html>而处理的代码是这个：package xt;import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class rets extends HttpServlet { public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException { response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter(); String username = request.getParameter("username").trim();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println("  <HEAD><TITLE>结果</TITLE></HEAD>");
out.println("  <BODY>"); if (username.equals("")) {
out.print("Login failed!");
} else {
out.print("Login succeeded!");
}
out.println("<br>"+username+"<br>");
out
.println("<a href=http://10.10.21.187:8080/ServerTest/index.jsp>返回</a>");
out.println("  </BODY>");
out.println("</HTML>"); out.flush();
out.close();
} public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}}
用的java severlet+tomcat

亲你的这个代码 text 值似乎传不进去啊，在toast里面提示出错！

你的方法可以正确的得到返回值了  但是返回的只是我那个网页处理的源代码的，并没有返回处理后的数据啊……
返回的是这个<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>用户登录界面</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<meta http-equiv="content-type" content="text/html; charset=gb2312">  </head>

  <body>
    <form action="rets" method="post">
   用户id：<input type="text" size=20 name="username">
   <br>            
    <input type="submit" value="提交">
    </form>
  </body>
</html>而处理的代码是这个：package xt;import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class rets extends HttpServlet { public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException { response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter(); String username = request.getParameter("username").trim();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println("  <HEAD><TITLE>结果</TITLE></HEAD>");
out.println("  <BODY>"); if (username.equals("")) {
out.print("Login failed!");
} else {
out.print("Login succeeded!");
}
out.println("<br>"+username+"<br>");
out
.println("<a href=http://10.10.21.187:8080/ServerTest/index.jsp>返回</a>");
out.println("  </BODY>");
out.println("</HTML>"); out.flush();
out.close();
} public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}}
用的java severlet+tomcat
我的示例代码用的是你实现的函数submitPostData，如果返回的数据不对，说明是你函数实现的问题。
你检查一下是不是url写错了。

package com.example.DialogForStart;import org.json.JSONException;
import org.json.JSONObject;import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import conn.ReadTextHttpClient;
import entity.UpdateInfo;public class MainActivity extends Activity { @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

checkUpdate();
} private void checkUpdate() {
new Thread(new Runnable() {

@Override
public void run() {
ReadTextHttpClient rt=new ReadTextHttpClient("http://10.0.2.2:8080/DialogForStart/DialogServlet");
String text=rt.doPost();
UpdateInfo uInfo=getUpdateFromJson(text);
Message message=new Message();
if (uInfo!=null) {
message.obj=uInfo;
message.what=1;
}else {
message.what=0;
}

myHandler.sendMessage(message);
}
}).start();
} Handler myHandler = new Handler(){

        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            switch (msg.what) {
            case  0:             break;
            case  1:
             final UpdateInfo uInfo=(UpdateInfo) msg.obj;
             AlertDialog.Builder builder = new Builder(MainActivity.this);

             builder.setTitle(uInfo.getTitle());
                builder.setMessage(uInfo.getMsg());
                //设置点击屏幕Dialog不消失
                builder.setCancelable(false);
                builder.setPositiveButton("确认",new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                     //点击确定,调用系统默认浏览器下载指定url的apk
                     Intent intent = new Intent();
                     intent.setAction("android.intent.action.VIEW");
                     Uri content_url = Uri.parse(uInfo.getUrl());
                     intent.setData(content_url);
                     startActivity(intent);
                    }
                });
                if (!uInfo.isMust()) {
                 builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            //dialog.dismiss();
                        }
                    });
}
              builder.create().show();
                break;
            }
        }

    };
    /**
* 解析json
* @param text
* @return
*/
private UpdateInfo getUpdateFromJson(String text) {
UpdateInfo uInfo=new UpdateInfo();
try {
JSONObject jsonObject = new JSONObject(text);
//获取大对象中up对象json
JSONObject jsonuInfo = jsonObject.getJSONObject("up");
uInfo.setTitle(jsonuInfo.getString("title"));
uInfo.setMsg(jsonuInfo.getString("msg"));
uInfo.setMust(jsonuInfo.getBoolean("must"));
uInfo.setUrl(jsonuInfo.getString("url"));
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
}
return uInfo;
}}
这几天没空来csdn,这是我之前写的一个demo

private void myRunOnUiThread(){
    new Thread(new Runnable() {
        @Override
        public void run() {
            DatiActivity.this.runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    toResult();
                    pd2.dismiss();
                }
            });
        }
    }).start();
}
这是最后一招了

调试易

【求助】android程序“已经停止运行“”……

解决方案 »