How to add icons to Preference

Question

I\'m making an app that extends the PreferenceActivity and I want to add an icon to each Preference.

I read a similar question, and this is the answer with more repu

Answer 1

Thanks to:

• The answer by @Tony_GPR
• https://github.com/CyanogenMod/android_packages_apps_Settings
• http://developer.android.com/guide/practices/ui_guidelines/icon_design.html
• http://developer.android.com/guide/practices/ui_guidelines/icon_design_list.html
• Scala

The following worked for me:

AndroidManifest.xml

res/values/strings.xml:

    YOUR_APP_NAME
    About

res/values/attrs.xml:

res/layout/main.xml:

res/layout/preference_icon.xml:

Appropriately sized icons under:

res/drawable-hdpi/YOUR_ICON.png
res/drawable-mdpi/YOUR_ICON.png
res/drawable-ldpi/YOUR_ICON.png

AndroidMain.scala:

class AndroidMain extends PreferenceActivity {
  override def onCreate(savedInstanceState: Bundle) {
    super.onCreate(savedInstanceState)
    addPreferencesFromResource(R.layout.main)
  }
}

IconPreference.scala:

class IconPreference(context: Context, attrs: AttributeSet, defStyle: Int) extends Preference(context, attrs, defStyle) {
    def this(context: Context, attrs: AttributeSet) = this(context, attrs, 0)

    setLayoutResource(R.layout.preference_icon);
    val a: TypedArray = context.obtainStyledAttributes(attrs, R.styleable.IconPreference, defStyle, 0);
    val _icon: Drawable = a.getDrawable(R.styleable.IconPreference_icon);

    override def onBindView(view: View) {
        super.onBindView(view)
        val imageView: ImageView = view.findViewById(R.id.icon).asInstanceOf[ImageView]
        if (imageView != null && _icon != null) {
            imageView.setImageDrawable(_icon);
        }
    }
}