Сохранить состояние CheckBox в SharedPreferences на Android

Question

У меня есть пара флажков, которые мне нужно сохранить, чтобы при повторном открытии приложения они могли видеть состояние, в котором они оставили приложение. Я попытался использовать предпочтения, но я не могу получить результат правильно.

MainActivity.java

package com.example.android.documentchecklist; 

import android.content.Context; 
import android.content.SharedPreferences; 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.view.View; 
import android.widget.CheckBox; 

public class MainActivity extends AppCompatActivity { 

    CheckBox allotment, sscMarkList, hscMarkList, leaving, profomaCap, jeeScoreCard, gapCer, casteCer, casteVal, nonCreamyL, domicileCertificate, photograph, migration, adhaarCard, nationalityCertificate; 
    boolean hasAllotment, hasSscMarkList, hasHscMarkList, hasLeaving, hasProfoma, hasJeeScore, hasGapCertificate, hasCasteCertificate, hasCasteValidity, hasNonCreamyLayer, hasDomicileCertificate, hasPhoto, hasMigCertificate, hasadhaarCard, hasNationalityCertificate; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     allotment = (CheckBox) findViewById(R.id.allot); 
     sscMarkList = (CheckBox) findViewById(R.id.ssc); 
     hscMarkList = (CheckBox) findViewById(R.id.hsc); 
     leaving = (CheckBox) findViewById(R.id.leaving); 
     profomaCap = (CheckBox) findViewById(R.id.profoma); 
     jeeScoreCard = (CheckBox) findViewById(R.id.jeeScore); 
     gapCer = (CheckBox) findViewById(R.id.gapCertificate); 
     casteCer = (CheckBox) findViewById(R.id.casteCertificate); 
     casteVal = (CheckBox) findViewById(R.id.casteValidity); 
     nonCreamyL = (CheckBox) findViewById(R.id.nonCreamyLayer); 
     adhaarCard = (CheckBox) findViewById(R.id.adhaarCard); 
     nationalityCertificate = (CheckBox) findViewById(R.id.nationalityCer); 
     domicileCertificate = (CheckBox) findViewById(R.id.domicile); 
     photograph = (CheckBox) findViewById(R.id.photo); 
     migration = (CheckBox) findViewById(R.id.migration); 

    } 


    public void checkBoxClicked(View view) { 

     int id = view.getId(); 

     if (id == R.id.mahaState) { 

      migration.setVisibility(View.GONE); 

      allotment.setText(getString(R.string.allot)); 
      allotment.setVisibility(View.VISIBLE); 
      hasAllotment = allotment.isChecked(); 


      sscMarkList.setText(getString(R.string.ssc)); 
      sscMarkList.setVisibility(View.VISIBLE); 
      hasSscMarkList = sscMarkList.isChecked(); 

      hscMarkList.setText(getString(R.string.hsc)); 
      hscMarkList.setVisibility(View.VISIBLE); 
      hasHscMarkList = hscMarkList.isChecked(); 

      leaving.setText(getString(R.string.leaving)); 
      leaving.setVisibility(View.VISIBLE); 
      hasLeaving = leaving.isChecked(); 

      profomaCap.setText(getString(R.string.proforma)); 
      profomaCap.setVisibility(View.VISIBLE); 
      hasProfoma = profomaCap.isChecked(); 

      jeeScoreCard.setText(getString(R.string.jee)); 
      jeeScoreCard.setVisibility(View.VISIBLE); 
      hasJeeScore = jeeScoreCard.isChecked(); 

      gapCer.setText(getString(R.string.gap_cert)); 
      gapCer.setVisibility(View.VISIBLE); 
      hasGapCertificate = gapCer.isChecked(); 

      casteCer.setText(getString(R.string.caste_cert)); 
      casteCer.setVisibility(View.VISIBLE); 
      hasCasteCertificate = casteCer.isChecked(); 

      casteVal.setText(getString(R.string.caste_validity)); 
      casteVal.setVisibility(View.VISIBLE); 
      hasCasteValidity = casteVal.isChecked(); 

      nonCreamyL.setText(getString(R.string.non_creamy)); 
      nonCreamyL.setVisibility(View.VISIBLE); 
      hasNonCreamyLayer = nonCreamyL.isChecked(); 

      adhaarCard.setText(getString(R.string.aadhar)); 
      adhaarCard.setVisibility(View.VISIBLE); 
      hasadhaarCard = adhaarCard.isChecked(); 

      nationalityCertificate.setText(getString(R.string.nationality_cert)); 
      nationalityCertificate.setVisibility(View.VISIBLE); 
      hasNationalityCertificate = nationalityCertificate.isChecked(); 

      domicileCertificate.setText(getString(R.string.domicile)); 
      domicileCertificate.setVisibility(View.VISIBLE); 
      hasDomicileCertificate = domicileCertificate.isChecked(); 

      photograph.setText(getString(R.string.photos)); 
      photograph.setVisibility(View.VISIBLE); 
      hasPhoto = photograph.isChecked(); 
     } 

    } 

    @Override 
    public void onPause() { 
     super.onPause(); 
     save(allotment.isChecked()); 
     save(sscMarkList.isChecked()); 
     save(hscMarkList.isChecked()); 
     save(leaving.isChecked()); 
     save(profomaCap.isChecked()); 
     save(jeeScoreCard.isChecked()); 
     save(gapCer.isChecked()); 
     save(casteCer.isChecked()); 
     save(casteVal.isChecked()); 
     save(nonCreamyL.isChecked()); 
     save(domicileCertificate.isChecked()); 
     save(photograph.isChecked()); 
     save(migration.isChecked()); 
     save(adhaarCard.isChecked()); 
     save(nationalityCertificate.isChecked()); 
    } 

    @Override 
    public void onResume() { 
     super.onResume(); 
     allotment.setChecked(load()); 
     sscMarkList.setChecked(load()); 
     sscMarkList.setChecked(load()); 
     hscMarkList.setChecked(load()); 
     leaving.setChecked(load()); 
     profomaCap.setChecked(load()); 
     jeeScoreCard.setChecked(load()); 
     gapCer.setChecked(load()); 
     casteCer.setChecked(load()); 
     casteVal.setChecked(load()); 
     nonCreamyL.setChecked(load()); 
     domicileCertificate.setChecked(load()); 
     photograph.setChecked(load()); 
     migration.setChecked(load()); 
     adhaarCard.setChecked(load()); 
     nationalityCertificate.setChecked(load()); 


    } 

    private void save(final boolean isChecked) { 
     SharedPreferences sharedPreferences = getPreferences(Context.MODE_PRIVATE); 
     SharedPreferences.Editor editor = sharedPreferences.edit(); 
     editor.putBoolean("check", isChecked); 
     editor.apply(); 
    } 

    private boolean load() { 
     SharedPreferences sharedPreferences = getPreferences(Context.MODE_PRIVATE); 
     return sharedPreferences.getBoolean("check", false); 
    } 

} 

Спасибо за вашу помощь.

Answer 1

вы используете единственный key т.е. check хранить все ваши checkbox состояние поэтому только состояние этого вызова save(nationalityCertificate.isChecked()); будут сохранены, так что вам нужно использовать различные keys для различных checkboxes

, например

// use different keys to store state of different check boxes 
    save(allotment.isChecked(),"allotment"); 
    save(sscMarkList.isChecked(),"sscMarkList"); 

    // use same keys to fetch values which were used during save function call 
    allotment.setChecked(load("allotment")); 
    sscMarkList.setChecked(load("sscMarkList")); 


private void save(final boolean isChecked, String key) { 
    SharedPreferences sharedPreferences = getPreferences(Context.MODE_PRIVATE); 
    SharedPreferences.Editor editor = sharedPreferences.edit(); 
    editor.putBoolean(key, isChecked); 
    editor.apply(); 
} 

private boolean load(String key) { 
    SharedPreferences sharedPreferences = getPreferences(Context.MODE_PRIVATE); 
    return sharedPreferences.getBoolean(key, false); 
} 

Примечание: вы также можете инициализировать свои общие предпочтения, такие как CheckBox views, в onCreate или onStart только один раз, а не повторно инициализировать его каждый раз в save