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Start your free trialKristóf Balajti-Tóth
17,675 PointsUsing the setChecked method
Hi! It is my first question. I can not figure it out what is wrong with my code. I got an error "Remember to call setChecked on the CheckBox object", but i think I use the setChecked method correctly. Thank in advance!
All the best, Kristof
import android.view.View;
import android.os.Bundle;
public class MainActivity extends Activity {
public CheckBox mCheckBox;
public static final String PREFS_FILE = "pref";
public static final String KEY_CHECKBOX = "check";
private SharedPreferences mSharedPreferences;
private SharedPreferences.Editor mEditor;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mCheckBox = (CheckBox) findViewById(R.id.checkBox);
mSharedPreferences = getSharedPreferences(PREFS_FILE, Context.MODE_PRIVATE);
mEditor = mSharedPreferences.edit();
if(mSharedPreferences.getBoolean(KEY_CHECKBOX, true)){
mCheckBox.setChecked(true);
}
if(mSharedPreferences.getBoolean(KEY_CHECKBOX, false)){
mCheckBox.setChecked(false);
}
}
@Override
protected void onPause() {
super.onPause();
if(mCheckBox.isChecked()){
mEditor.putBoolean(KEY_CHECKBOX, mCheckBox.isChecked());
mEditor.apply();
} else {
mEditor.putBoolean(KEY_CHECKBOX, !mCheckBox.isChecked());
mEditor.apply();
}
}
}
1 Answer
Seth Kroger
56,413 PointsI think you're over-thinking the code a bit. isChecked() already gives you a value you can put into preferences, so there is no need for the if statements. (Note that putting the same value in if true, but the inverse if false, always puts the value of true into shared prefs.)
@Override
protected void onPause() {
super.onPause();
mEditor.putBoolean(KEY_CHECKBOX, mCheckBox.isChecked());
mEditor.apply();
}
Kristóf Balajti-Tóth
17,675 PointsKristóf Balajti-Tóth
17,675 PointsThank for your answer. It was very helpful, I managed to solve the test.
Seth Kroger
56,413 PointsSeth Kroger
56,413 PointsYou're welcome! :)