Spinner在Dialog中的使用效果实例代码详解

<&＃63;xml version="1.0" encoding="utf-8"&＃63;>

 
 

private void showAlertDialog() {
 View view = LayoutInflater.from(this).inflate(R.layout.dialog_add_notebook, null);
 Spinner spinner = view.findViewById(R.id.spinner);
 ArrayAdapter arrayAdapter = new ArrayAdapter<>(this, R.layout.simple_spinner_item, android.R.id.text1, categories);
 spinner.setAdapter(arrayAdapter);
 spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
  @Override
  public void onItemSelected(AdapterView<&＃63;> parent, View view, int position, long id) {
   Toast.makeText(MainActivity.this, "选中的分类是: " + categories.get(position), Toast.LENGTH_LONG).show();
  }
 
  @Override
  public void onNothingSelected(AdapterView<&＃63;> parent) {
 
  }
 });
 new AlertDialog.Builder(this)
   .setTitle("提示")
   .setView(view)
   .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
     dialog.dismiss();
    }
   })
   .show();
}

<&＃63;xml version="1.0" encoding="utf-8"&＃63;>

 
 

public void onClickedAddNotebook(final String parentNotebookId, List notebooks) {
 View view = LayoutInflater.from(mActivity).inflate(R.layout.dialog_add_notebook, null);
 final EditText mEdit = (EditText) view.findViewById(R.id.edit);
 final MaterialBetterSpinner spinner = (MaterialBetterSpinner) view.findViewById(R.id.spinner);
 final List tempNotebooks = new ArrayList<>();
 tempNotebooks.clear();
 tempNotebooks.addAll(notebooks);
 Notebook rootNoteBook = new Notebook();
 rootNoteBook.setTitle(mActivity.getString(R.string.notebook_default_root_notebook_title));
 tempNotebooks.add(0, rootNoteBook);
 SpinnerArrayAdapter adapter = new SpinnerArrayAdapter(view.getContext(), tempNotebooks) {
  @Override
  public String itemToString(Notebook item) {
   return item.getTitle();
  }
 };
 spinner.setAdapter(adapter);
 spinner.setText(rootNoteBook.getTitle());
 new AlertDialog.Builder(mActivity)
   .setTitle(R.string.add_notebook)
   .setView(view)
   .setPositiveButton(R.string.confirm, new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
     dialog.dismiss();
     addNotebook(mEdit.getText().toString(), getNotebookId(tempNotebooks, spinner.getText().toString()));
    }
   })
   .show();
}