Skip to main content

Stop Android SeekBar resetting



I have a ListView in which each item has a SeekBar.





When I update the progress of the Seekbar this is written to a database so it can be reloaded when the application is used again.





Unfortunately if the ListView is scrolled up or down so that any of the items disappear from the visible screen, when they are redrawn they are drawn with the old value.





How do I get the activity to "refresh" when the SeekBar is updated so the values behind the ListView are in sync with the database, this should stop the SeekBar being redrawn with stale data.







@Override

public View getView(int position, View convertView, ViewGroup parent) {

View view = convertView;

try {

if (view == null) {

LayoutInflater vi = (LayoutInflater) mContext

.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

view = vi.inflate(R.layout.task_list_item, null);

}

final Task t = mList.get(position);

if (t != null) {



/* assign layout elements */

final SeekBar seekBar = (SeekBar) view.findViewById(R.id.seek);

final TextView textViewDescription = (TextView) view

.findViewById(R.id.task_description_text_view);

final TextView textViewTaskId = (TextView) view

.findViewById(fyp.proj.R.id.task_id_text_view);

final TextView textViewTaskTitle = (TextView) view

.findViewById(R.id.task_title_text_view);



/* populate layout with task details */

textViewTaskId.setText(String.valueOf(t.getTaskId()));

textViewTaskTitle.setText(t.getTaskTitle());

textViewDescription.setText(t.getTaskDesc());

seekBar.setProgress(t.getProgress());

seekBar.setTag(t.getTaskId());



/* attach listener */

attachProgressUpdatedListener(seekBar);



}

} catch (Exception e) {

Log.i(TaskAdapter.class.toString(), Log.getStackTraceString(e));

}

return view;

}



private void attachProgressUpdatedListener(SeekBar seekBar) {

seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {



public void onStopTrackingTouch(SeekBar seekBar) {

int progress = seekBar.getProgress();

int task_id = (Integer) seekBar.getTag();



// task handler instansiated with zero as parent project id is

// not needed here.

TaskHandler taskHandler = new TaskHandler(DBAdapter

.getDBAdapterInstance(getContext()), 0);



taskHandler.updateTaskProgress(task_id, progress);



}



public void onStartTrackingTouch(SeekBar seekBar) {

// empty as onStartTrackingTouch listener not being used in

// current implementation



}



public void onProgressChanged(SeekBar seekBar, int progress,

boolean fromUser) {

// empty as onProgressChanged listener not being used in

// current implementation



}

});



}




Comments

Popular posts from this blog

Slow Android emulator

I have a 2.67 GHz Celeron processor, 1.21 GB of RAM on a x86 Windows XP Professional machine. My understanding is that the Android emulator should start fairly quickly on such a machine, but for me it does not. I have followed all instructions in setting up the IDE, SDKs, JDKs and such and have had some success in staring the emulator quickly but is very particulary. How can I, if possible, fix this problem?

CCNA 1 Final Exam 2011 latest (hot hot hot)

  Hi! I have been posted content of ccna1 final exam (latest and only question.) I will post the answer and insert image on sunday. If you care, please subscribe your email an become a first person have full test content. Subcribe now  Some question  have not content because this question have images content. So that can you wait for me? SUNDAY 1. A user sees the command prompt: Router(config-if)# . What task can be performed at this mode? Reload the device. Perform basic tests. Configure individual interfaces. Configure individual terminal lines. 2. Refer to the exhibit. Host A attempts to establish a TCP/IP session with host C. During this attempt, a frame was captured with the source MAC address 0050.7320.D632 and the destination MAC address 0030.8517.44C4. The packet inside the captured frame has an IP source address 192.168.7.5, and the destination IP address is 192.168.219.24. At which point in the network was this packet captured? leaving host A leaving ATL leaving...