Php 模拟器不显示消息框
收到服务器的JSON响应后,我想显示一个消息框。在下面给出的代码中,数据库正在正确更新,但未显示消息框。它只是显示“不幸的是,myapp已停止”消息。我不知道代码究竟哪里出错。在编码中未发现错误。 这是我的.java文件Php 模拟器不显示消息框,php,android,messagebox,Php,Android,Messagebox,收到服务器的JSON响应后,我想显示一个消息框。在下面给出的代码中,数据库正在正确更新,但未显示消息框。它只是显示“不幸的是,myapp已停止”消息。我不知道代码究竟哪里出错。在编码中未发现错误。 这是我的.java文件 package com.example.loga; import android.os.Bundle; import android.app.Activity; import android.app.AlertDialog; import android.util.Log
package com.example.loga;
import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.util.Log;
import android.view.Menu;
import android.widget.Button;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONObject;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.view.View;
import android.widget.EditText;
public class MainActivity1 extends Activity {
private ProgressDialog pDialog;
JSONParser jsonParser = new JSONParser();
EditText inputuserid;
EditText inputserverid;
private static String url_register = "http://10.0.2.2/android_connect/register.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_activity1);
// Edit Text
inputuserid = (EditText) findViewById(R.id.editText1);
inputserverid= (EditText) findViewById(R.id.editText2);
Button button1 = (Button) findViewById(R.id.button1);
button1.setOnClickListener(new View.OnClickListener()
{
public void onClick(View view) {
// creating new product in background thread
new add().execute();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main_activity1, menu);
return true;
}
class add extends AsyncTask<String, String,String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity1.this);
pDialog.setMessage("your Registration is processing..wait for few sec..");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Creating product
* */
protected String doInBackground(String... args) {
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
String userid = inputuserid.getText().toString();
String serverid = inputserverid.getText().toString();
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>(2);
params.add(new BasicNameValuePair("userid",userid));
params.add(new BasicNameValuePair("serverid", serverid));
JSONObject json = jsonParser.makeHttpRequest(url_register,
"POST", params);
Log.d("Create Response", json.toString());
try
{
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
AlertDialog alertDialog;
alertDialog = new AlertDialog.Builder(MainActivity1.this).create();
alertDialog.setTitle("password verification..");
alertDialog.setMessage("success.!!");
alertDialog.show();
finish();
} else {
// failed to create product
}
}
catch (Exception e) {
e.printStackTrace();
}
}
}
}
package com.example.loga;
导入android.os.Bundle;
导入android.app.Activity;
导入android.app.AlertDialog;
导入android.util.Log;
导入android.view.Menu;
导入android.widget.Button;
导入java.util.ArrayList;
导入java.util.List;
导入org.apache.http.NameValuePair;
导入org.apache.http.message.BasicNameValuePair;
导入org.json.JSONObject;
导入android.app.ProgressDialog;
导入android.os.AsyncTask;
导入android.view.view;
导入android.widget.EditText;
公共类MainActivity1扩展活动{
私人对话;
JSONParser JSONParser=新的JSONParser();
EditText输入用户ID;
EditText inputserverid;
专用静态字符串url_寄存器=”http://10.0.2.2/android_connect/register.php";
//JSON节点名称
私有静态最终字符串标记_SUCCESS=“SUCCESS”;
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity\u main\u activity1);
//编辑文本
inputuserid=(EditText)findViewById(R.id.editText1);
inputserverid=(EditText)findViewById(R.id.editText2);
按钮button1=(按钮)findViewById(R.id.button1);
button1.setOnClickListener(新视图.OnClickListener()
{
公共void onClick(视图){
//在后台线程中创建新产品
新建add().execute();
}
});
}
@凌驾
公共布尔onCreateOptions菜单(菜单){
//为菜单充气;这会将项目添加到操作栏(如果存在)。
getMenuInflater().充气(R.menu.main_活动1,菜单);
返回true;
}
类添加扩展异步任务{
/**
*在启动后台线程显示进度对话框之前
* */
@凌驾
受保护的void onPreExecute(){
super.onPreExecute();
pDialog=新建进度对话框(MainActivity1.this);
setMessage(“您的注册正在处理..请稍等几秒钟…”);
pDialog.setUndeterminate(假);
pDialog.setCancelable(真);
pDialog.show();
}
/**
*创造产品
* */
受保护的字符串doInBackground(字符串…args){
返回null;
}
/**
*完成后台任务后,关闭“进度”对话框
* **/
受保护的void onPostExecute(字符串文件\u url){
字符串userid=inputuserid.getText().toString();
字符串serverid=inputserverid.getText().toString();
//建筑参数
列表参数=新的ArrayList(2);
添加(新的BasicNameValuePair(“userid”,userid));
add(新的BasicNameValuePair(“serverid”,serverid));
JSONObject json=jsonParser.makeHttpRequest(url\u寄存器,
“POST”,params);
d(“创建响应”,json.toString());
尝试
{
int success=json.getInt(TAG_success);
如果(成功==1){
警报对话框警报对话框;
alertDialog=新建alertDialog.Builder(MainActivity1.this.create();
alertDialog.setTitle(“密码验证…”);
alertDialog.setMessage(“成功!!”);
alertDialog.show();
完成();
}否则{
//未能创建产品
}
}
捕获(例外e){
e、 printStackTrace();
}
}
}
}
我的PHP文件是:
<?php
$response = array();
// check for required fields
if (isset($_POST['userid']) && isset($_POST['serverid']))
{
$userid = $_POST['userid'];
$serverid= $_POST['serverid'];
// include db connect class
require_once __DIR__ . '/db_connect.php';
// connecting to db
$db = new DB_CONNECT();
// mysql inserting a new row
$result = mysql_query("INSERT INTO opass(User_ID, Server_ID ) VALUES('$userid', '$serverid')");
// check if row inserted or not
if ($result)
{
// successfully inserted into database
$response["success"] = 1;
$response["message"] = " Registered successfully";
// echoing JSON response
echo json_encode($response);
}
else
{
// failed to insert row
$response["success"] = 0;
$response["message"] = "Oops! An error occurred.";
// echoing JSON response
echo json_encode($response);
}
}
else
{
// required field is missing
$response["success"] = 1;
$response["message"] = "Required field(s) is missing";
// echoing JSON response
echo json_encode($response);
}
?>
您无法运行
AlertDialog alertDialog;
alertDialog = new AlertDialog.Builder(MainActivity1.this).create();
alertDialog.setTitle("password verification..");
alertDialog.setMessage("success.!!");
alertDialog.show();
这是在线程
上执行的,与UI线程
使用处理程序
或runOnUiThread()
通过以下方式编辑或更改对话框中的零件:
runOnUiThread(new Runnable() {
@Override
public void run() {
AlertDialog alertDialog;
alertDialog = new AlertDialog.Builder(MainActivity1.this).create();
alertDialog.setTitle("password verification..");
alertDialog.setMessage("success.!!");
alertDialog.show();
}
});
使用调试,请参阅logcat..检查错误..这将有所帮助..如何确保这不会失败?JSONObject json=jsonParser.makeHttpRequest(url_寄存器,“POST”,参数);logcat显示04-21 16:57:10.492:I/编舞(27578):跳过38帧!应用程序可能在其主线程上做了太多工作。04-21 16:57:13.182:I/编舞(27578):跳过了104帧!应用程序可能在其主线程上做了太多工作。04-21 16:57:13.842:I/编舞(27578):跳过了31帧!应用程序可能在其主线程上做了太多的工作。您是说命令失败了吗?我是android新手。请帮助我fix@logurani请参阅我编辑的答案。我对此更新。请建议ant教程或链接。非常感谢。我仍然在加载命令“您的注册正在处理..等待几秒钟..”3分钟。我的编码有任何问题吗?这意味着永远不会调用onPostExecute
runOnUiThread(new Runnable() {
@Override
public void run() {
AlertDialog alertDialog;
alertDialog = new AlertDialog.Builder(MainActivity1.this).create();
alertDialog.setTitle("password verification..");
alertDialog.setMessage("success.!!");
alertDialog.show();
}
});