我正在開發一個Listview動態填充的函數,該函數返回接收String參數的ArrayAdapter。該字符串參數是另一個動態填充的微調器的選定項目。如何在ListView中使用ArrayAdapter刪除ListView中的所有項目
當函數返回一個ArrayAdapter且項數大於0時,Listview會成功刷新新項目,但是當函數在ArrayAdapter上返回0項時,listview不會清除以前的項目。這裏是我工作的代碼:
ManifiestoSpinner = (Spinner) findViewById(R.id.spnManifiesto);
FacturasListview = (ListView) findViewById(R.id.lvwFacturas);
ManifiestoSpinner = (Spinner)
ManifiestoSpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
String EstadoID = EstadoSpinner.getSelectedItem().toString();
ArrayList<String> ListManifiestos = (ArrayList<String>)Factura.GetManifiestosByEstado(EstadoID);
ActualizarManifiestSpinner(manifiesto);
}
public void onNothingSelected(AdapterView<?> arg0) {
}
private void ActualizarManifiestSpinner (ArrayList<String> manifiesto)
{
String[] datos = new String[manifiesto.size()];
ArrayAdapter<String> AdapterManifiesto = new ArrayAdapter<String>(getApplicationContext(),
android.R.layout.simple_spinner_dropdown_item, manifiesto.toArray(datos));
ManifiestoSpinner.setAdapter(AdapterManifiesto);
}
ManifiestoSpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
String Manifiesto = ManifiestoSpinner.getSelectedItem().toString();
String Estado = EstadoSpinner.getSelectedItem().toString();
fillData(Estado, Manifiesto);
return;
}
public void onNothingSelected(AdapterView<?> arg0) {
}
});
private void fillData(String EstadoID, String ManifiestoID) {
ArrayAdapter<String> adapter = (ArrayAdapter<String>) FacturasListview.getAdapter();
if(adapter!= null)
{
adapter.clear();
FacturasListview.setAdapter(adapter);
FacturasListview.invalidateViews();
}
List<String> from = Factura.GetListClientesByEstadoManifiesto(EstadoID, ManifiestoID);
adapter = new ArrayAdapter<String>(this,R.layout.factura_row, R.id.text1 ,from);
FacturasListview.setAdapter(adapter);
}
當從被稱爲列表具有from.size()= 0,則項目之前顯示在列表視圖不會被清零。
謝謝Nammari。我遵循你的建議,但是我發佈了一個細節。 – 2012-02-09 20:23:42