Stockage des données d'entrée utilisateur dans la mémoire interne

Question

J'essaye de créer une application simple qui est fondamentalement un tracker qui garde la trace de non. de cours pour chaque matière pour un étudiant. L'application est spécifique à mon horaire de collège. L'idée est que j'ai 3 activités: main.java, Sublist.java et editcrap.java. Le main.java agit comme un écran de démarrage et lance l'activité Sublist.

Dans l'activité Sous-liste, l'utilisateur affiche une mise en page affichant (TextView) (Button) (Counter_TextView) horizontalement l'un par rapport à l'autre. Il y en a 7 alignés verticalement. Lorsque vous cliquez sur le bouton de menu: (Modifier les paramètres du sujet), vous cliquez sur l'activité editcrap.java où l'utilisateur saisit les zones EditText correspondantes pour demander le nom du sujet (TextView) et nombre total de classes correspondant à (Counter_TextView) dans l'activité Sous-liste. En cliquant sur le bouton OK, les données sont transmises à l'activité Sublist pour affichage et manipulation. Une fois cela fait, j'avais besoin d'un moyen de stocker les données de sorte que la prochaine fois que l'application est ouverte, il conserve sa chaîne précédente et non. des valeurs de classes. C'est là que je suis en train de forcer des erreurs de fermeture ou aucune rétention d'erreur de données. Voici mon code ... cud quelqu'un s'il vous plaît dites-moi, je me trompe? J'ai lutté pendant des jours avec ceci :) J'ai fondamentalement besoin de l'application pour maintenir 2 dossiers un contenant des chaînes et les autres nombres qui doivent être lus et montrés dans l'activité de Sublist.java car nous avons besoin de toutes les modifications apportées par l'application utilisateur se refléter vers les fichiers originaux ainsi

//Sublist.java: 


package com.shuaib669.bunkrecord; 

import java.io.DataInputStream; 
import java.io.DataOutputStream; 
import java.io.IOException; 
import android.app.Activity; 
import android.content.Context; 
import android.content.Intent; 
import android.graphics.Color; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.widget.Button; 
import android.widget.TextView; 
import android.view.Menu; 
import android.view.MenuInflater; 
import android.view.MenuItem; 

public class Sublist extends Activity{ 

double[] no_of_classes = new double[7]; 
int count[]= new int[7]; 
double cutOff = 0.3; 
String[] newText = new String[7]; 
String[] newNum = new String[7]; 
String countString = null; 
TextView subject[] = new TextView[7]; 
TextView counter[] = new TextView[7]; //sub11 is counter text view label 
Button button[] = new Button[7];  //button1 is the increment button 


@Override 
protected void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 

    //Assigning Views to objects. 
      subject[0] = (TextView) findViewById(R.id.textView1); 
      counter[0] = (TextView) findViewById(R.id.counter1); 
      button[0] = (Button) findViewById(R.id.button1); 

      subject[1] = (TextView) findViewById(R.id.textView2); 
      counter[1] = (TextView) findViewById(R.id.counter2); 
      button[1] = (Button) findViewById(R.id.button2); 

      subject[2] = (TextView) findViewById(R.id.textView3); 
      counter[2] = (TextView) findViewById(R.id.counter3); 
      button[2] = (Button) findViewById(R.id.button3); 

      subject[3] = (TextView) findViewById(R.id.textView4); 
      counter[3] = (TextView) findViewById(R.id.counter4); 
      button[3] = (Button) findViewById(R.id.button4); 

      subject[4] = (TextView) findViewById(R.id.textView5); 
      counter[4] = (TextView) findViewById(R.id.counter5); 
      button[4] = (Button) findViewById(R.id.button5); 

      subject[5] = (TextView) findViewById(R.id.textView6); 
      counter[5] = (TextView) findViewById(R.id.counter6); 
      button[5] = (Button) findViewById(R.id.button6); 

      subject[6] = (TextView) findViewById(R.id.textView7); 
      counter[6] = (TextView) findViewById(R.id.counter7); 
      button[6] = (Button) findViewById(R.id.button7); 

      try { 
     // open the file for reading 

     DataInputStream in= new DataInputStream(openFileInput(getFilesDir() + "/" + "subject.txt")); 
     // if file the available for reading 
     if (in!= null) { 
      // prepare the file for reading 
      String line; 
      int x=0; 
      // read every line of the file into the line-variable, on line at the time 
      while(in.readLine() != null) { 
       // do something with the strings from the file 

       line=DataInputStream.readUTF(in); 
       subject[x].setTextColor(Color.BLACK); 
       subject[x].setText(line); 
       x+=1; 

      } 

     } 

     // close the file again 
     in.close(); 
     } 
    catch (Exception e) { 
     e.printStackTrace();// do something if the myfilename.txt does not exits 
     } 

    button[0].setOnClickListener(new View.OnClickListener() { 

     public void onClick(View v) { 
      // TODO Auto-generated method stub 
      if(count[0]>=(no_of_classes[0]*cutOff)){ 
       counter[0].setTextColor(Color.RED); 
       countString = "" +(++count[0]);     //Convert from int to String to set in your textview:: 
       counter[0].setText(countString); 
      } 
      else{ 
       countString = "" +(++count[0]);     //Convert from int to String to set in your textview:: 
       counter[0].setText(countString); 
      } 


     } 
    }); 

    button[1].setOnClickListener(new View.OnClickListener() { 

     public void onClick(View v) { 
      // TODO Auto-generated method stub 
      if(count[1]>=(no_of_classes[1]*cutOff)){ 
       counter[1].setTextColor(Color.RED); 
       countString = "" +(++count[1]);     //Convert from int to String to set in your textview:: 
       counter[1].setText(countString); 
      } 
      else{ 
       countString = "" +(++count[1]);     //Convert from int to String to set in your textview:: 
       counter[1].setText(countString); 
      } 


     } 
    }); 

    button[2].setOnClickListener(new View.OnClickListener() { 

     public void onClick(View v) { 
      // TODO Auto-generated method stub 
      if(count[2]>=(no_of_classes[2]*cutOff)){ 
       counter[2].setTextColor(Color.RED); 
       countString = "" +(++count[2]);     //Convert from int to String to set in your textview:: 
       counter[2].setText(countString); 
      } 
      else{ 
       countString = "" +(++count[2]);     //Convert from int to String to set in your textview:: 
       counter[2].setText(countString); 
      } 


     } 
    }); 

    button[3].setOnClickListener(new View.OnClickListener() { 

     public void onClick(View v) { 
      // TODO Auto-generated method stub 
      if(count[3]>=(no_of_classes[3]*cutOff)){ 
       counter[3].setTextColor(Color.RED); 
       countString = "" +(++count[3]);     //Convert from int to String to set in your textview:: 
       counter[3].setText(countString); 
      } 
      else{ 
       countString = "" +(++count[3]);     //Convert from int to String to set in your textview:: 
       counter[3].setText(countString); 
      } 


     } 
    }); 

    button[4].setOnClickListener(new View.OnClickListener() { 

     public void onClick(View v) { 
      // TODO Auto-generated method stub 
      if(count[4]>=(no_of_classes[4]*cutOff)){ 
       counter[4].setTextColor(Color.RED); 
       countString = "" +(++count[4]);     //Convert from int to String to set in your textview:: 
       counter[4].setText(countString); 
      } 
      else{ 
       countString = "" +(++count[4]);     //Convert from int to String to set in your textview:: 
       counter[4].setText(countString); 
      } 


     } 
    }); 

    button[5].setOnClickListener(new View.OnClickListener() { 

     public void onClick(View v) { 
      // TODO Auto-generated method stub 
      if(count[5]>=(no_of_classes[5]*cutOff)){ 
       counter[5].setTextColor(Color.RED); 
       countString = "" +(++count[5]);     //Convert from int to String to set in your textview:: 
       counter[5].setText(countString); 
      } 
      else{ 
       countString = "" +(++count[5]);     //Convert from int to String to set in your textview:: 
       counter[5].setText(countString); 
      } 


     } 
    }); 

    button[6].setOnClickListener(new View.OnClickListener() { 

     public void onClick(View v) { 
      // TODO Auto-generated method stub 
      if(count[6]>=(no_of_classes[6]*cutOff)){ 
       counter[6].setTextColor(Color.RED); 
       countString = "" +(++count[6]);     //Convert from int to String to set in your textview:: 
       counter[6].setText(countString); 
      } 
      else{ 
       countString = "" +(++count[6]);     //Convert from int to String to set in your textview:: 
       counter[6].setText(countString); 
      } 


     } 
    }); 



} 

public boolean onCreateOptionsMenu(Menu menu){  // What the MENU button does. 
    super.onCreateOptionsMenu(menu); 
    MenuInflater castle = getMenuInflater(); 
    castle.inflate(R.menu.main_menu, menu); 
    return(true); 
} 


public boolean onOptionsItemSelected(MenuItem item){ // Opens Options of MENU. 

    switch(item.getItemId()){ 

    case R.id.editcrap: startActivityForResult((new Intent("com.shuaib669.bunkrecord.EDITCRAP")), 1); 
         return(true); 
    } 

return(false); 
} 


@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
// TODO Auto-generated method stub 
super.onActivityResult(requestCode, resultCode, data); 
switch(requestCode){ 

case 1: if(resultCode==Activity.RESULT_OK){ 

     newText = data.getStringArrayExtra("com.shuaib669.bunkrecord.thetext"); 
     newNum = data.getStringArrayExtra("com.shuaib669.bunkrecord.thenum"); 

     try { 
       // open myfilename.txt for writing 
     DataOutputStream out = new DataOutputStream(openFileOutput(getFilesDir() + "/" + "subject.txt", Context.MODE_PRIVATE));  
     //newNum = data.getIntArrayExtra("com.shuaib669.thenum"); 
     //for loop to setText in the TextViews of main.xml 
     for(int x=0;x<7;x++){ 



        subject[x].setTextColor(Color.BLACK); 
        subject[x].setText(newText[x]); 
        // write the contents on mySettings to the file 
        out.writeUTF(newText[x]); 

        try{ 
         no_of_classes[x]=Integer.parseInt(newNum[x]); 
         } 
         catch(Exception nfe){ 
          nfe.printStackTrace(); 
         }   
        // close the file 
        out.close(); 
        } 
     } 


     catch (Exception e) { 
        Log.i("Data Input Sample", "I/O Error"); //do something if an Exception occurs. 
       } 



      } 


break; 
}            


} 
    } 

//editcrap.java:

package com.shuaib669.bunkrecord; 

import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.widget.EditText; 


public class editcrap extends Activity{ 

EditText sub[] = new EditText[7];   //list of subject text edit labels. 
Button parambutton1;           //OK buttons for edit list. 
EditText num[] = new EditText[7];   //list of objects of total no. of classes bunked edit text labels. (boinkers i know) 
String theText[] = new String[7]; 
String theNum[] = new String[7]; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.params); 

    sub[0] = (EditText) findViewById(R.id.peditText1);   //pedittext is the parameter menu edit text label 
    num[0] = (EditText) findViewById(R.id.pnumText1);   //EditText label for takin in total no. of classes for 1 subject 

    sub[1] = (EditText) findViewById(R.id.peditText2); 
    num[1] = (EditText) findViewById(R.id.pnumText2); 

    sub[2] = (EditText) findViewById(R.id.peditText3); 
    num[2] = (EditText) findViewById(R.id.pnumText3); 

    sub[3] = (EditText) findViewById(R.id.peditText4); 
    num[3] = (EditText) findViewById(R.id.pnumText4); 

    sub[4] = (EditText) findViewById(R.id.peditText5); 
    num[4] = (EditText) findViewById(R.id.pnumText5); 

    sub[5] = (EditText) findViewById(R.id.peditText6); 
    num[5] = (EditText) findViewById(R.id.pnumText6); 

    sub[6] = (EditText) findViewById(R.id.peditText7); 
    num[6] = (EditText) findViewById(R.id.pnumText7); 

    parambutton1 = (Button) findViewById(R.id.parambutton1); //pbutton1 is the ok button to accept the input. 

    parambutton1.setOnClickListener(new View.OnClickListener() { 

     public void onClick(View v) { 
      // TODO Auto-generated method stub 


      for(int x=0;x<7;x++){ 


        theText[x] = sub[x].getText().toString(); 
        theNum[x] = num[x].getText().toString(); 
        //theNum[x] = Integer.parseInt(num[x].getText().toString()); 

       } 



      Intent data = new Intent(editcrap.this, Sublist.class); 
      data.putExtra("com.shuaib669.bunkrecord.thetext", theText); 
      data.putExtra("com.shuaib669.bunkrecord.thenum", theNum); 
      setResult(Activity.RESULT_OK, data); 
      finish(); 

     } 
    }); 


} 




} 

Answer 1

utilisation des préférences partagées

public static final String PREFS_NAME = "MyPrefsFile"; 
private static final String PREF_USERNAME = "username"; 
private static final String PREF_PASSWORD = "password"; 

code suivant dans onCreate() méthode

EtUserName=(EditText) findViewById(R.id.EditText01); 
EtPassword=(EditText) findViewById(R.id.EditText02); 

ici, vous obtenez la valeur Préférences dans editText ... (si vous avez précédentes sauvegarder vos préférences)

SharedPreferences pref = getSharedPreferences(PREFS_NAME,MODE_PRIVATE); 
String username = pref.getString(PREF_USERNAME, null); 
String password = pref.getString(PREF_PASSWORD, null); 

EtUserName.setText(username); 
EtPassword.setText(password); 

code suivant dans case à cocher événement click ... (sauvegarder vos préférences ici)

   String us,pa; 
     us=EtUserName.getText().toString(); 
     pa=EtPassword.getText().toString(); 
     SharedPreferences settings = getSharedPreferences(PREFS_NAME,MODE_PRIVATE); 
         getSharedPreferences(PREFS_NAME,MODE_PRIVATE) 
         .edit() 
         .putString(PREF_USERNAME, us) 
         .putString(PREF_PASSWORD, pa) 
         .commit(); 

pour plus d'informations click here .ET here