I have defined preferences in my app using preferences.xml and a PreferenceActivity. The settings are presented in the phone in a ScrollView-like-way. I would like to always show the vertical scrollbars all the time. In Android 1.6 they do not fade away, but in Android 2.2 the fade away after about a second. In a ScrollView I can control this using android:scrollbarAlwaysDrawVerticalTrack or android:scrollbarDefaultDelayBeforeFade. How can I do this with the preference widget?
/P
This worked for my Android 2.3.3 .
public class MyPreferenceActivity extends PreferenceActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getListView().setScrollbarFadingEnabled(false);
...
}
...
}
Try this as the above suggestions didn't work for me when I wanted to do this for a TextView:
TextView.setScrollbarFadingEnabled(false);
Try android:scrollbarAlwaysDrawVerticalTrack="true" in the PreferenceScreen.
So hey, this is a seriously ugly solution, but its short and it works.
public class PreferenceActivity extends Activity {
//Sorry for stupid variable names, couldn't be bothered to be smart
private ScrollView svOptions;
private Runnable _run_sb_on;
private final Handler _handle_sb_on = new Handler();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.preference);
svOptions = (ScrollView) findViewById(R.id.svOptions);
_run_sb_on = new Runnable() { //i hate you google for making me write crap code !
public void run() {
svOptions.fling(0); //don't move it, just keep it alive
_handle_sb_on.postDelayed(this, 300); //300 is the timeout of the fader
}
};
_handle_sb_on.post(_run_sb_on);
}
// etc
}
So there you have it. Note that the fling can eat on-touch events, its rare but its a little annoying - but workable.
Put this in the scroller that you want to show scrollbars all the time:
android:scrollbarFadeDuration="0"
Counterintuitive, I know, but it works perfectly.
