Android/MySQL 运行时错误
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【中文标题】Android/MySQL 运行时错误【英文标题】：Android/MySQL Runtime error 【发布时间】：2017-05-31 07:00:53 【问题描述】：我正在尝试插入 mysql 数据库，并且代码可以工作并且确实插入但立即崩溃，看不到问题。
applications.loginandregister E/AndroidRuntime: FATAL EXCEPTION: main 进程：applications.loginandregister，PID：2545 android.view.WindowManager$BadTokenException: 无法添加窗口 -- 令牌 android.os.BinderProxy@5aa47b4 无效；是你的活动 跑步？ 在 android.view.ViewRootImpl.setView(ViewRootImpl.java:849) 在 android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:337) 在 android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91) 在 android.app.Dialog.show(Dialog.java:350) 在 android.app.AlertDialog$Builder.show(AlertDialog.java:1113) 在 applications.loginandregister.BackgroundTask.display(BackgroundTask.java:206) 在 applications.loginandregister.BackgroundTask.onPostExecute(BackgroundTask.java:192) 在 applications.loginandregister.BackgroundTask.onPostExecute(BackgroundTask.java:32) 在 android.os.AsyncTask.finish(AsyncTask.java:651) 在 android.os.AsyncTask.access$500(AsyncTask.java:180) 在 android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:668) 在 android.os.Handler.dispatchMessage(Handler.java:102) 在 android.os.Looper.loop(Looper.java:158) 在 android.app.ActivityThread.main(ActivityThread.java:7224) 在 java.lang.reflect.Method.invoke（本机方法） 在 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) 在 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
package applications.loginandregister;
import android.app.AlertDialog;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.renderscript.ScriptGroup;
import android.widget.TextView;
import android.widget.Toast;
import org.w3c.dom.Text;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.nio.Buffer;
import javax.net.ssl.HttpsURLConnection;
/**
* Created by Mitch on 2016-06-04.
*/
public class BackgroundTask extends AsyncTask<String,Void,String>
SharedPreferences preferences;
SharedPreferences.Editor editor;
Context context;
BackgroundTask(Context ctx)
this.context = ctx;
@Override
protected String doInBackground(String... params)
preferences = context.getSharedPreferences("MYPREFS", Context.MODE_PRIVATE);
editor = preferences.edit();
editor.putString("flag","0");
editor.commit();
String urlRegistration = "http://domain.com/LoginAndRegister-register.php";
String urlLogin = "http://domain.com/LoginAndRegister-login.php";
String task = params[0];
if(task.equals("register"))
String regName = params[1];
String regEmail = params[2];
String regPassword = params[3];
try
URL url = new URL(urlRegistration);
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setDoOutput(true);
OutputStream outputStream = httpURLConnection.getOutputStream();
OutputStreamWriter outputStreamWriter = new OutputStreamWriter(outputStream,"UTF-8");
BufferedWriter bufferedWriter = new BufferedWriter(outputStreamWriter);
String myData = URLEncoder.encode("identifier_name","UTF-8")+"="+URLEncoder.encode(regName,"UTF-8")+"&"
+URLEncoder.encode("identifier_email","UTF-8")+"="+URLEncoder.encode(regEmail,"UTF-8")+"&"
+URLEncoder.encode("identifier_password","UTF-8")+"="+URLEncoder.encode(regPassword,"UTF-8");
bufferedWriter.write(myData);
bufferedWriter.flush();
bufferedWriter.close();
InputStream inputStream = httpURLConnection.getInputStream();
inputStream.close();
editor.putString("flag","register");
editor.commit();
return "Successfully Registered " + regName;
catch (MalformedURLException e)
e.printStackTrace();
catch (IOException e)
e.printStackTrace();
if(task.equals("login"))
String loginEmail = params[1];
String loginPassword = params[2];
try
URL url = new URL(urlLogin);
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setDoOutput(true);
httpURLConnection.setDoInput(true);
//send the email and password to the database
OutputStream outputStream = httpURLConnection.getOutputStream();
OutputStreamWriter outputStreamWriter = new OutputStreamWriter(outputStream,"UTF-8");
BufferedWriter bufferedWriter = new BufferedWriter(outputStreamWriter);
String myData = URLEncoder.encode("identifier_loginEmail","UTF-8")+"="+URLEncoder.encode(loginEmail,"UTF-8")+"&"
+URLEncoder.encode("identifier_loginPassword","UTF-8")+"="+URLEncoder.encode(loginPassword,"UTF-8");
bufferedWriter.write(myData);
bufferedWriter.flush();
bufferedWriter.close();
outputStream.close();
//get response from the database
InputStream inputStream = httpURLConnection.getInputStream();
InputStreamReader inputStreamReader = new InputStreamReader(inputStream,"UTF-8");
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
String dataResponse = "";
String inputLine = "";
while((inputLine = bufferedReader.readLine()) != null)
dataResponse += inputLine;
bufferedReader.close();
inputStream.close();
httpURLConnection.disconnect();
System.out.println("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
System.out.println(dataResponse);
editor.putString("flag","login");
editor.commit();
return dataResponse;
catch (MalformedURLException e)
e.printStackTrace();
catch (IOException e)
e.printStackTrace();
return null;
@Override
protected void onPreExecute()
super.onPreExecute();
//This method willbe called when doInBackground completes... and it will return the completion string which
//will display this toast.
@Override
protected void onPostExecute(String s)
String flag = preferences.getString("flag","0");
if(flag.equals("register"))
Toast.makeText(context,s,Toast.LENGTH_LONG).show();
if(flag.equals("login"))
String test = "false";
String name = "";
String email = "";
String[] serverResponse = s.split(",");
test = serverResponse[0];
name = serverResponse[1];
email = serverResponse[2];
//display("Message ",serverResponse[2]);
if(test.equals("true"))
editor.putString("name",name);
editor.commit();
editor.putString("email",email);
editor.commit();
Intent intent = new Intent(context,LogginIn.class);
context.startActivity(intent);
else
display("Login Failed...", "That email and password do not match our records :(.");
else
display("Login Failed...","Something weird happened :(.");
@Override
protected void onProgressUpdate(Void... values)
super.onProgressUpdate(values);
public void display(String title, String message)
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setCancelable(true);
builder.setTitle(title);
builder.setMessage(message);
builder.show();
似乎我注释掉了 finish(); 它可以工作，但仍然不正确，表明登录失败发生了一些奇怪的事情。
这里是注册页面
public class Register extends AppCompatActivity
EditText etName, etEmail, etPassword;
String name, email, password;
Button btnRegister;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.register_layout);
etName = (EditText) findViewById(R.id.etNewName);
etEmail = (EditText) findViewById(R.id.etNewEmail);
etPassword = (EditText) findViewById(R.id.etNewPassword);
btnRegister = (Button) findViewById(R.id.btnNewRegister);
btnRegister.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
name = etName.getText().toString();
email = etEmail.getText().toString();
password = etPassword.getText().toString();
String task = "register";
BackgroundTask backgroundTask = new BackgroundTask(Register.this);
backgroundTask.execute(task,name, email, password);
//finish();
);
【问题讨论】：
我猜背景任务无法打开对话窗口！ 登录没问题。 【参考方案1】：您需要在 UI 线程上显示对话框。
runOnUiThread(new Runnable()
@Override
public void run()
display("Login Failed...","Something weird happened :(.");
);
【讨论】：
不知道为什么会出现问题 - 你能详细说明一下 您正在后台线程中运行 UI 操作，因此它正在崩溃。以上是关于Android/MySQL 运行时错误的主要内容，如果未能解决你的问题，请参考以下文章