preference | Tech Tips & Tricks

How To Remove A Preference In PreferenceActivity

November 10, 2015 by blogmeister·0 Comments

Removing a preference in a PreferenceActivity is pretty simple.

Preference p = findPreference("your_preference_key");
getPreferenceScreen().removePreference(p);

1 2	Preference p = findPreference("your_preference_key"); getPreferenceScreen().removePreference(p);

However, if your preference is within a category, you need to get a reference to that category and remove it from there.

PreferenceCategory pc = findPreference("your_preference_key");
Preference p = findPreference("your_preference_key");
pc.removePreference(p);

PreferenceCategory pc = findPreference("your_preference_key");

Preference p = findPreference("your_preference_key");

pc.removePreference(p);

How To Change The Preference Title Color In Android

October 30, 2015 by blogmeister·0 Comments

The Material Design of Android Lollipop has made it easier for developers to customize the theme of their apps. However, making it compatible for pre-Lollipop devices still has its limitations.

I tried to change the preference title color by using textColorPrimary and it did not work. So I had to do it programmatically.

There are two ways to do this. If you have any custom class that extends Preference, then you can add this code in the onBindView() method.

@Override
protected void onBindView(View view) {
    ((TextView) view.findViewById(android.R.id.title)).setTextColor(Color.BLACK);
    super.onBindView(view);
}

@Override

protected void onBindView(View view) {

((TextView) view.findViewById(android.R.id.title)).setTextColor(Color.BLACK);

super.onBindView(view);

}

If you are using the existing Preference class or even the CheckBoxPreference, you can do it this way:

Spannable title = new SpannableString(pref.getTitle().toString());
title.setSpan(new ForegroundColorSpan(Color.BLACK), 0, title.length(), 0);
pref.setTitle(title);

Spannable title = new SpannableString(pref.getTitle().toString());

title.setSpan(new ForegroundColorSpan(Color.BLACK), 0, title.length(), 0);

pref.setTitle(title);

That should do the trick!

Android CheckBoxPreference As RadioButton

June 12, 2015 by blogmeister·0 Comments

While there is now RadioButton Preference widget in Android, you can use the existing CheckBoxPreference widget, add the same OnPreferenceClickListener and add a little code to ensure that only one CheckBox gets clicked.

To start with, here is a sample of a preference XML file.

<PreferenceCategory android:title="@string/pref_view_mode">
    <CheckBoxPreference
        android:title="test1"
        android:defaultValue="1"
        android:key="cbViewModeList"
    />
    <CheckBoxPreference
        android:title="test2"
        android:defaultValue="0"
        android:key="cbViewModeCalendar"
    />
</PreferenceCategory>

<CheckBoxPreference

android:title="test1"

android:defaultValue="1"

android:key="cbViewModeList"

<CheckBoxPreference

android:title="test2"

android:defaultValue="0"

android:key="cbViewModeCalendar"

</PreferenceCategory>

And in the onCreate() method, you can do it like this:

@Override
public void onCreate(Bundle paramBundle) {
    super.onCreate(paramBundle);
    addPreferencesFromResource(R.xml.pref_setting);
    final ArrayList<CheckBoxPreference> alViewMode = new ArrayList<>();
    Preference.OnPreferenceClickListener listener = new Preference.OnPreferenceClickListener() {
        @Override
        public boolean onPreferenceClick(Preference preference) {
            for (CheckBoxPreference cbp : alViewMode) {
                if (!cbp.getKey().equals(preference.getKey()) && cbp.isChecked()) {
                    cbp.setChecked(false);
                }
                else if (cbp.getKey().equals(preference.getKey()) && !cbp.isChecked()) {
                    cbp.setChecked(true);
                }
            }
            return false;
        }
    };
    CheckBoxPreference cbpViewModeList = (CheckBoxPreference) getPreferenceManager().findPreference("cbViewModeList");
    cbpViewModeList.setOnPreferenceClickListener(listener);
    CheckBoxPreference cbpViewModeCalendar = (CheckBoxPreference) getPreferenceManager().findPreference("cbViewModeCalendar");
    cbpViewModeCalendar.setOnPreferenceClickListener(listener);
    alViewMode.add(cbpViewModeList);
    alViewMode.add(cbpViewModeCalendar);
}

@Override

public void onCreate(Bundle paramBundle) {

super.onCreate(paramBundle);

addPreferencesFromResource(R.xml.pref_setting);

final ArrayList<CheckBoxPreference> alViewMode = new ArrayList<>();

Preference.OnPreferenceClickListener listener = new Preference.OnPreferenceClickListener() {

@Override

public boolean onPreferenceClick(Preference preference) {

for (CheckBoxPreference cbp : alViewMode) {

if (!cbp.getKey().equals(preference.getKey()) && cbp.isChecked()) {

cbp.setChecked(false);

}

else if (cbp.getKey().equals(preference.getKey()) && !cbp.isChecked()) {

cbp.setChecked(true);

}

return false;

}

};

CheckBoxPreference cbpViewModeList = (CheckBoxPreference) getPreferenceManager().findPreference("cbViewModeList");

cbpViewModeList.setOnPreferenceClickListener(listener);

CheckBoxPreference cbpViewModeCalendar = (CheckBoxPreference) getPreferenceManager().findPreference("cbViewModeCalendar");

cbpViewModeCalendar.setOnPreferenceClickListener(listener);

alViewMode.add(cbpViewModeList);

alViewMode.add(cbpViewModeCalendar);

}

That should do it.

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Tag: preference

How To Remove A Preference In PreferenceActivity

How To Change The Preference Title Color In Android

Android CheckBoxPreference As RadioButton