public class TaskList extends Activity {

            CheckBox cb1, cb2, cb3, cb4;

            Boolean checked = false;

            @Override

            protected void onCreate(Bundle savedInstanceState) {

                setContentView(R.layout.activity_tasks);

                super.onCreate(savedInstanceState);

                findID();

                cb1 = (CheckBox) findViewById(R.id.checkBox1);

                boolean isChecked = getBooleanFromPreferences("isChecked");

                Log.i("start", "" + isChecked);

                cb1.setChecked(isChecked);

                cb1.setOnCheckedChangeListener(new OnCheckedChangeListener() {

                    @Override

                    public void onCheckedChanged(CompoundButton view, boolean isChecked) {

                        Log.i("boolean", "" + isChecked);

                        putBooleanInPreferences(isChecked,"isChecked");

                    }

                });

            }

            public void putBooleanInPreferences(boolean isChecked, String key) {

                SharedPreferences sharedPreferences = this

                        .getPreferences(Activity.MODE_PRIVATE);

                SharedPreferences.Editor editor = sharedPreferences.edit();

                editor.putBoolean(key, isChecked);

                editor.commit();

            }

            private boolean getBooleanFromPreferences(String key) {

                SharedPreferences sharedPreferences = this

                        .getPreferences(Activity.MODE_PRIVATE);

                Boolean isChecked = sharedPreferences.getBoolean(key, false);

                return isChecked;

            }

            private void findID() {

                cb1 = (CheckBox) findViewById(R.id.checkBox1);

                cb2 = (CheckBox) findViewById(R.id.checkBox2);

                cb3 = (CheckBox) findViewById(R.id.checkBox3);

                cb4 = (CheckBox) findViewById(R.id.checkBox4);

            }

        }