我有一个应用程序，它通过Android中的EditText获取输入，并通过php服务将这些值发送回数据库。 php服务是正确的。但它发送给定的错误。为什么..？
05-07 22:36:25.882: D/ActivityThread(21174): handleBindApplication:com.example.pgfinder
05-07 22:36:25.932: W/ApplicationPackageManager(21174): getCSCPackageItemText()
05-07 22:36:25.932: D/DisplayManager(21174): DisplayManager()
05-07 22:36:26.233: D/OpenGLRenderer(21174): Enabling debug mode 0
05-07 22:36:26.303: I/Timeline(21174): Timeline: Activity_idle id: android.os.BinderProxy@41e5bc30 time:53798431
05-07 22:36:27.784: I/Timeline(21174): Timeline: Activity_launch_request id:com.example.pgfinder time:53799926
05-07 22:36:27.814: W/ApplicationPackageManager(21174): getCSCPackageItemText()
05-07 22:36:28.094: I/Timeline(21174): Timeline: Activity_idle id: android.os.BinderProxy@41ebc438 time:53800237
05-07 22:36:28.705: D/AndroidRuntime(21174): Shutting down VM
05-07 22:36:28.705: W/dalvikvm(21174): threadid=1: thread exiting with uncaught exception (group=0x41689bc0)
05-07 22:36:28.715: E/AndroidRuntime(21174): FATAL EXCEPTION: main
05-07 22:36:28.715: E/AndroidRuntime(21174): Process: com.example.pgfinder, PID: 21174
05-07 22:36:28.715: E/AndroidRuntime(21174): java.lang.NullPointerException
05-07 22:36:28.715: E/AndroidRuntime(21174): at com.example.pgfinder.Signup$2.onClick(Signup.java:64)
05-07 22:36:28.715: E/AndroidRuntime(21174): at android.view.View.performClick(View.java:4496)
05-07 22:36:28.715: E/AndroidRuntime(21174): at android.view.View$PerformClick.run(View.java:18603)
05-07 22:36:28.715: E/AndroidRuntime(21174): at android.os.Handler.handleCallback(Handler.java:733)
05-07 22:36:28.715: E/AndroidRuntime(21174): at android.os.Handler.dispatchMessage(Handler.java:95)
05-07 22:36:28.715: E/AndroidRuntime(21174): at android.os.Looper.loop(Looper.java:136)
05-07 22:36:28.715: E/AndroidRuntime(21174): at android.app.ActivityThread.main(ActivityThread.java:5433)
05-07 22:36:28.715: E/AndroidRuntime(21174): at java.lang.reflect.Method.invokeNative(Native Method)
05-07 22:36:28.715: E/AndroidRuntime(21174): at java.lang.reflect.Method.invoke(Method.java:515)
05-07 22:36:28.715: E/AndroidRuntime(21174): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
05-07 22:36:28.715: E/AndroidRuntime(21174): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
05-07 22:36:28.715: E/AndroidRuntime(21174): at dalvik.system.NativeStart.main(Native Method)
05-07 22:36:29.916: I/Process(21174): Sending signal. PID: 21174 SIG: 9
05-07 22:36:30.066: D/ActivityThread(21305): handleBindApplication:com.example.pgfinder
05-07 22:36:30.096: W/ApplicationPackageManager(21305): getCSCPackageItemText()
05-07 22:36:30.096: D/DisplayManager(21305): DisplayManager()
05-07 22:36:30.247: D/OpenGLRenderer(21305): Enabling debug mode 0
05-07 22:36:30.287: I/Timeline(21305): Timeline: Activity_idle id: android.os.BinderProxy@41e570a8 time:53802425
，代码是..
package com.example.pgfinder;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import com.example.pgfinder.handler.ServiceHandler;
import android.support.v7.app.ActionBarActivity;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class Signup extends ActionBarActivity
{
EditText Name,Email,Phone,Password,Confirm_Password,City;
Button backBtn, signupBtn;
String name,email,phone,password,c_password,city,jsonFormat;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.signup);
backBtn=(Button) findViewById(R.id.back);
signupBtn=(Button) findViewById(R.id.signup);
backBtn.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
// TODO Auto-generated method stub
Intent in = new Intent(getApplicationContext(), MainActivity.class);
startActivity(in);
Name=(EditText) findViewById(R.id.name);
Email=(EditText) findViewById(R.id.email);
Phone=(EditText) findViewById(R.id.phone);
Password=(EditText) findViewById(R.id.password);
Confirm_Password=(EditText) findViewById(R.id.confirm_password);
City=(EditText) findViewById(R.id.city);
}
});
signupBtn.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View view) {
// TODO Auto-generated method stub
name=Name.getText().toString();
email=Email.getText().toString();
phone=Phone.getText().toString();
password=Password.getText().toString();
c_password=Confirm_Password.getText().toString();
city=City.getText().toString();
if (name.equals("") || email.equals(""))
{
Toast.makeText(getApplicationContext(),
"Enter FirstName & Email", 5000).show();
} else {
new SignupTask()
.execute("www.webpage.com/usersignup.php");
}
}
});
}
class SignupTask extends AsyncTask<String, Void, String>
{
@Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
Log.i("TAG", "URL : " + params[0]);
Log.i("TAG", "registerStr : " + name);
ServiceHandler sh = new ServiceHandler();
List<NameValuePair> nameValuePairsList = new ArrayList<NameValuePair>();
nameValuePairsList.add(new BasicNameValuePair("name", name));
nameValuePairsList.add(new BasicNameValuePair("email", email));
nameValuePairsList.add(new BasicNameValuePair("phone", phone));
nameValuePairsList.add(new BasicNameValuePair("city", city));
nameValuePairsList.add(new BasicNameValuePair("password", password));
nameValuePairsList.add(new BasicNameValuePair("c_password", c_password));
String res = sh.makeServiceCall(params[0], ServiceHandler.GET,
nameValuePairsList);
Log.i("TAG", "RESPONSE : " + res);
return res;
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
}
protected void onPostExecute(String result) {
super.onPostExecute(result);
JSONObject jObject;
try
{
jObject = new JSONObject(result);
//String response = jObject.getString("success").toString();
Toast.makeText(getApplicationContext(), result, 3000).show();
if (jObject.getString("success").toString()
.equalsIgnoreCase("1")) {
Toast.makeText(getApplicationContext(),
"done", 3000).show();
} else {
Toast.makeText(getApplicationContext(),
"fuck off", 3000).show();
}
}
catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
答案 0 :(得分：1)
您的代码中存在多个错误。这些是：
05-07 22：36：28.715：E / AndroidRuntime（21174）：at com.example.pgfinder.Signup $ 2.onClick（Signup.java:64）
通过查看您的logcat，您的第一个问题就在这里
signupBtn.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View view) {
// TODO Auto-generated method stub
}
});
您需要发布XML布局，以便我们可以确切地告诉您错误的位置。您可能在XML中使用了不同的按钮ID，并且您正在尝试访问其他一些ID。但不确定。您需要先发布您的布局。
此外，你应该移动这一切
Name=(EditText) findViewById(R.id.name);
Email=(EditText) findViewById(R.id.email);
Phone=(EditText) findViewById(R.id.phone);
Password=(EditText) findViewById(R.id.password);
Confirm_Password= (EditText)findViewById(R.id.confirm_password);
City=(EditText) findViewById(R.id.city);
之前的setOnClickListener，
Name=(EditText) findViewById(R.id.name);
Email=(EditText) findViewById(R.id.email);
Phone=(EditText) findViewById(R.id.phone);
Password=(EditText) findViewById(R.id.password);
Confirm_Password=(EditText)findViewById (R.id.confirm_password);
City=(EditText) findViewById(R.id.city);
backBtn.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
}
});
另外，请使用Toast方法
Toast.makeText(MainActivity.class,"Enter FirstName & Email",Toast.LENGTH_LONG).show();
根据您的需要更改长度或长度。
我不知道为什么后面的按钮onClickListener中有intent。为什么呢？
Intent in = new Intent(getApplicationContext(), MainActivity.class);
startActivity(in);