Android-Dialogfeld mit PIN-Eingabe

Question

Ich versuche, eine PIN-Eingabe als Dialog zu tun. Dieser Teil funktioniert gut. Aber wenn ich meine PIN eintrage und versuche, sie mit meiner angeforderten PIN zu vergleichen, schließt sie einfach meinen Dialog.

So, hier ist mein Code: PinInput.java

package com.ts.techassi.ts; 

import android.app.AlertDialog; 
import android.app.Dialog; 
import android.app.DialogFragment; 
import android.content.ComponentName; 
import android.content.Context; 
import android.content.DialogInterface; 
import android.content.Intent; 
import android.content.IntentFilter; 
import android.content.pm.PackageManager; 
import android.net.Uri; 
import android.os.Bundle; 
import android.os.Environment; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.widget.EditText; 
import android.widget.TextView; 

import java.io.BufferedReader; 
import java.io.File; 
import java.io.FileReader; 
import java.io.IOException; 
import java.util.ArrayList; 
import java.util.List; 


public class PinInput extends DialogFragment { 
    public final static String EXTRA_MESSAGE = "tuerschild.saschalautenschlaege.tuerschild.MESSAGE"; 
    Context context; 
    @Override 
    public Dialog onCreateDialog(Bundle savedInstanceState) { 
     AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); 
     LayoutInflater inflater = getActivity().getLayoutInflater(); 
     builder.setView(inflater.inflate(R.layout.pin_input, null)); 
     Log.i("LOL", "Started"); 

     builder.setMessage("Enter PIN") 
       .setPositiveButton("OK", new DialogInterface.OnClickListener() { 
        public void onClick(DialogInterface dialog, int id) { 
         Uri url = readUrl(); 
         Dialog f = (Dialog) dialog; 
         // String ts_id = url.getLastPathSegment(); 
         EditText pin = (EditText)f.findViewById(R.id.pin); 
         TextView test = (TextView) f.findViewById(R.id.response); 
         String pinString = pin.getText().toString(); 

         try { 
          String response = new Http().execute().get(); 
          // Log.i("test", response); 
          if(response == pinString) { 
           Boolean isLauncher = isMyAppLauncherDefault(); 
           if(isLauncher == true){ 
            resetPreferredLauncherAndOpenChooser(context); 
           } 
          } else { 
           PinInput.this.getDialog().cancel(); 
          } 
         } catch (Exception e) { 
          e.printStackTrace(); 
          Log.i("Test",e.toString()); 
         } 
        } 
       }) 
       .setNegativeButton("Abbrechen", new DialogInterface.OnClickListener() { 
        public void onClick(DialogInterface dialog, int id) { 
         // User cancelled the dialog 
        } 
       }); 
     return builder.create(); 
    } 

    public Uri readUrl() { 
     String fileDirectory = Environment.getExternalStorageDirectory()+"/dbDoorsign/url.txt"; 

     File file = new File(fileDirectory); 

     StringBuilder text = new StringBuilder(); 
     ; 

     try { 
      BufferedReader br = new BufferedReader(new FileReader(file)); 
      String line; 

      while ((line = br.readLine()) != null) { 
       text.append(line); 
      } 
      br.close(); 
     } 
     catch (IOException e) { 

     } 
     return Uri.parse(text.toString()); 
    } 

    private boolean isMyAppLauncherDefault() { 
     final IntentFilter filter = new IntentFilter(Intent.ACTION_MAIN); 
     filter.addCategory(Intent.CATEGORY_HOME); 

     List<IntentFilter> filters = new ArrayList<IntentFilter>(); 
     filters.add(filter); 

     final String myPackageName = getActivity().getPackageName(); 
     List<ComponentName> activities = new ArrayList<ComponentName>(); 
     final PackageManager packageManager = (PackageManager) getActivity().getPackageManager(); 

     packageManager.getPreferredActivities(filters, activities, null); 

     for (ComponentName activity : activities) { 
      if (myPackageName.equals(activity.getPackageName())) { 
       return true; 
      } 
     } 
     return false; 
    } 

    public static void resetPreferredLauncherAndOpenChooser(Context context) { 
     PackageManager packageManager = context.getPackageManager(); 
     ComponentName componentName = new ComponentName(context, FakeLauncherActivity.class); 
     packageManager.setComponentEnabledSetting(componentName, PackageManager.COMPONENT_ENABLED_STATE_ENABLED, PackageManager.DONT_KILL_APP); 

     Intent selector = new Intent(Intent.ACTION_MAIN); 
     selector.addCategory(Intent.CATEGORY_HOME); 
     selector.putExtra(EXTRA_MESSAGE, "1"); 
     selector.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
     context.startActivity(selector); 

     packageManager.setComponentEnabledSetting(componentName, PackageManager.COMPONENT_ENABLED_STATE_DEFAULT, PackageManager.DONT_KILL_APP); 
    } 

} 

Meine zweite Datei Http.java

package com.ts.techassi.ts; 

import android.os.AsyncTask; 
import android.widget.TextView; 

import java.io.BufferedReader; 
import java.io.InputStreamReader; 
import java.net.HttpURLConnection; 
import java.net.URL; 


public class Http extends AsyncTask<String, Void, String> { 
    String USER_AGENT = "Mozilla/5.0"; 
    private TextView scanResults; 

    @Override 
    protected String doInBackground(String... url) { 

     try { 
      return sendGet(); 
     } catch (Exception e) { 
      e.printStackTrace(); 
      return e.toString(); 
     } 
    } 

    private String sendGet() throws Exception { 

     String url = "http://my.url.com"; 

     URL obj = new URL(url); 
     HttpURLConnection con = (HttpURLConnection) obj.openConnection(); 

     // optional default is GET 
     con.setRequestMethod("GET"); 

     //add request header 
     con.setRequestProperty("User-Agent", USER_AGENT); 

     int responseCode = con.getResponseCode(); 

     BufferedReader in = new BufferedReader(
       new InputStreamReader(con.getInputStream())); 
     String inputLine; 
     StringBuffer response = new StringBuffer(); 

     while ((inputLine = in.readLine()) != null) { 
      response.append(inputLine); 
     } 
     in.close(); 

     // print result 
     // System.out.println(response.toString()); 
     return response.toString(); 

    } 


} 

EDIT 1:

Changed if(pinString == response)-if(pinString.equals(response))

Also ich denke tha ts alles was du brauchst. Ich hoffe ihr könnt mir helfen.

Answer 1

Das Problem ist, diese Zeile:

if(response == pinString) { 

nie vergleichen Strings wie dies in Java. Ändern Sie ihn auf:

if(pinString.equals(response)) { 

Der Grund dafür ist, dass in Java, Operator == Instanzen vergleicht, nicht Inhalt. Es funktioniert für Primitive (wie Ints und Longs), aber Objekte, einschließlich Strings, müssen mit der .equals() Methode verglichen werden, die den Inhalt vergleicht, nicht die Instanz.