can't delete and remove sharedprefences file

can't delete and remove sharedprefences file

i have posting question in here but i got nothing, so i decide to make a
new question for searching other solution.
this is my case : First, I was using Shared preferences for my application
for sending data from one activity to another, when listview is clicked in
first activity, it will going to detail. when other list is clicked, it
will going to first data that i've clicked before it. then i realize if i
use sharedprefences for sending data from one activity to other activity,
it will save in device memory, so i change my code and decide to use
intent, but my sharedprefences's file is not remove. when list is clicked,
it will going to first data that i've clicked when i use shared prefences.
I have used:
settings.edit().clear().commit();
and
settings.edit().remove().commit();
but i think it doesn't work. this is my first activity using intent :
public class TerbaruSimasCard extends ListActivity {
String nama1,alamat1,ket1,img_id1,telp1,begdate1,enddate1;
private ProgressDialog dialog;
private ArrayList<TerbaruModel>ListTerbaru;
ListView list;
@Override
protected void onCreate(Bundle savedInstanceState) {
//hide title bar
BasicDisplaySettings.toggleTaskBar(TerbaruSimasCard.this, false);
//show status bar
BasicDisplaySettings.toggleStatusBar(TerbaruSimasCard.this,
true);
SharedPreferences settings =
getSharedPreferences("PREFS_NAME", 0);
settings.edit().clear().commit();
super.onCreate(savedInstanceState);
setContentView(R.layout.terbarusimascard);
ListTerbaru= new ArrayList<TerbaruModel>();
new TerbaruAsyncTask().execute();
}
public class TerbaruAsyncTask extends AsyncTask<Void, Void, String> {
String url = ("http://www.abc.xyz/sc_merchant.htm?s=3&d=25");
public TerbaruAsyncTask() {
this.url=url;
}
protected void onPreExecute (){
super.onPreExecute();
dialog = ProgressDialog.show(TerbaruSimasCard.this,"",
"melakukan pengambilan data...");
}
@Override
protected String doInBackground(Void... params) {
String result = "";
try {
result= Connection.get(url);
} catch (Exception e){
result = "";
Log.d("test", e.getMessage());
}
return result;
}
@Override
protected void onPostExecute (String result){
super.onPostExecute(result);
fetchResponse(result.replace("\n","").trim());
dialog.dismiss();
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent detail= new Intent (TerbaruSimasCard.this,
TerbaruDetail.class);
detail.putExtra("nama", nama1);
detail.putExtra("alamat",alamat1);
detail.putExtra("ket", ket1);
detail.putExtra("telp",telp1);
detail.putExtra("begdate", begdate1);
detail.putExtra("enddate",enddate1);
detail.putExtra("img_id", img_id1);
System.out.println(nama1);
startActivity (detail);
}
});
}
}
private void fetchResponse (String result){
if (!result.equals("")){
try {
JSONArray jsonArray = new JSONArray(result);
TerbaruModel LT=null;
for (int i= 0; i < jsonArray.length(); i++) {
JSONObject jsonObject= jsonArray.getJSONObject (i);
LT= new TerbaruModel (jsonObject.optString("kat"),
img_id1=jsonObject.optString("img_id"),
nama1= jsonObject.optString("nama"),
alamat1=jsonObject.optString("alamat"),
ket1=jsonObject.optString("ket"),
jsonObject.optString("tgl"),
jsonObject.optString("accday"),
telp1=jsonObject.optString("telp"),
begdate1=jsonObject.optString("begdate"),
enddate1=jsonObject.optString("enddate")
);
ListTerbaru.add(LT);
list=(ListView)findViewById(android.R.id.list);
setListAdapter (new TerbaruAdapter(this, ListTerbaru));
}
this is for detail :
public class TerbaruDetail extends Activity {
String nama1,alamat1,ket1,img_id1,telp1,begdate1,enddate1;
@Override
public void onCreate (Bundle savedInstanceState){
SharedPreferences settings = getSharedPreferences("PREFS_NAME", 0);
settings.edit().clear().commit();
//hide title bar
BasicDisplaySettings.toggleTaskBar(TerbaruDetail.this, false);
//show status bar
BasicDisplaySettings.toggleStatusBar(TerbaruDetail.this, true);
super.onCreate(savedInstanceState);
setContentView(R.layout.detailviewer);
Intent detail= getIntent();
nama1=detail.getStringExtra("nama");
alamat1= detail.getStringExtra("alamat");
ket1= detail.getStringExtra("ket");
img_id1= detail.getStringExtra("img_id");
telp1= detail.getStringExtra("telp");
begdate1= detail.getStringExtra("begdate");
enddate1= detail.getStringExtra("enddate");
System.out.println(nama1+"nama");
TextView detail_phone=(TextView) findViewById(R.id.detail_phone);
TextView detail_begdate=(TextView) findViewById(R.id.begdate);
TextView detail_enddate=(TextView) findViewById(R.id.endate);
TextView detail_name =(TextView) findViewById(R.id.detail_name);
TextView detail_adress =(TextView) findViewById(R.id.detail_adress);
TextView keterangan =(TextView) findViewById(R.id.keterangan);
ImageView detail_img_id= (ImageView) findViewById(R.id.img_kategori);
detail_name.setText(nama1);
detail_phone.setText(telp1);
detail_begdate.setText(begdate1);
detail_enddate.setText(enddate1);
detail_adress.setText(alamat1);
keterangan.setText(ket1);
}
i don't know where is my fault, i hope somebody can help me to solve my
problem, thank you.