1
在a simple test project at GitHub我顯示RecyclerView
與android.R.layout.simple_list_item_multiple_choice
行佈局:RecyclerView與DialogFragment的內部simple_list_item_multiple_choice
在SwapTilesDialogFragment我已經實現流行的「片段接口」圖案,並希望通過選擇的行通過其doPositiveClick()
方法:
public class SwapTilesDialogFragment extends DialogFragment {
public final static String TAG = "SwapTilesDialogFragment";
private final static String ARG = "ARG";
public interface MyListener {
public void doPositiveClick();
public void doNegativeClick();
}
private MyListener mListener;
@Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof MyListener) {
mListener = (MyListener) context;
} else {
throw new ClassCastException(context.toString() +
" must implement " + TAG + ".MyListener");
}
}
@Override
public void onDetach() {
super.onDetach();
mListener = null;
}
private class MyViewHolder
extends RecyclerView.ViewHolder
implements View.OnClickListener {
public MyViewHolder(View v) {
super(v);
v.setOnClickListener(this);
}
@Override
public void onClick(View v) {
Toast.makeText(getContext(),
"You have clicked " + ((TextView) v).getText(),
Toast.LENGTH_SHORT).show();
}
}
private RecyclerView mRecyclerView;
private char[] mLetters;
public static SwapTilesDialogFragment newInstance(char[] letters) {
SwapTilesDialogFragment f = new SwapTilesDialogFragment();
Bundle args = new Bundle();
args.putCharArray(ARG, letters);
f.setArguments(args);
return f;
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
mLetters = getArguments().getCharArray(ARG);
mRecyclerView = new RecyclerView(getContext());
mRecyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
mRecyclerView.setAdapter(new RecyclerView.Adapter<MyViewHolder>() {
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(
android.R.layout.simple_list_item_multiple_choice,
parent,
false);
MyViewHolder vh = new MyViewHolder(v);
return vh;
}
@Override
public void onBindViewHolder(MyViewHolder vh, int position) {
TextView tv = (TextView) vh.itemView;
tv.setText(String.valueOf(mLetters[position]));
}
@Override
public int getItemCount() {
return mLetters.length;
}
});
return new AlertDialog.Builder(getActivity())
.setIcon(R.mipmap.ic_launcher)
.setTitle(R.string.swap_tiles_title)
.setView(mRecyclerView)
.setPositiveButton(R.string.swap_tiles_ok,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
mListener.doPositiveClick();
}
}
)
.setNegativeButton(R.string.swap_tiles_cancel,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
mListener.doNegativeClick();
}
}
)
.create();
}
}
我的問題:
如何顯示用戶在RecyclerView中單擊某一行時的複選標記以及在我致電doPositiveClick()
之前如何/如何收集所有選定的行?
中檢索選中的字母這是很好的建議,謝謝+1。不過,我認爲'RecyclerView'(或適配器?)中已經有一些「數組」來容納選定的行,並且傾向於使用它......此外,當我旋轉時,複選框將被重置。 –
適配器所擁有的唯一數組就是您在其上創建的數組('mLetters = getArguments()。getCharArray(ARG);')。所以你必須應用這個答案中解釋的技巧。爲了節省旋轉,你必須使用'savedInstanteceState' – Budius
我想知道是否可以在調用doPositiveClick之前填充checkedLetters ... –