Android DialogFragment that gives the user some list options to choose from
- DialogFragment that creates an AlertDialog with the title and options specified in the constructor
- Can store some a data object (useful if you want the user to select an action on a specific item)
- Is retained in case of an orientation change
- Works great with ActionBarSherlock
- FIXME: do not use custom constructor, but add data with .setArguments and a Bundle
ChooserFragment.java
Java
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package com.kopfgeldjaeger.fddbscanner; import android.app.Activity; import android.app.AlertDialog; import android.app.Dialog; import android.content.DialogInterface; import android.content.DialogInterface.OnClickListener; import android.os.Bundle; import com.actionbarsherlock.app.SherlockDialogFragment; public class ChooserFragment extends SherlockDialogFragment implements OnClickListener { private ChooserFragmentInterface mInterface; private String title; private CharSequence[] options; private Object dataObject; public interface ChooserFragmentInterface { /** * Called when the user has made a choice * * @param choice * Index of the option the user chose * @param dataObject * Data object passed to constructor */ public void onChooserFragmentResult(int choice, Object dataObject); } @Override public void onAttach(Activity activity) { super.onAttach(activity); try { mInterface = (ChooserFragmentInterface) activity; } catch (ClassCastException e) { throw new ClassCastException(activity.toString() + " must implement ChooserFragmentInterface"); } } /** * @param title * Dialog title * @param options * The options that the user can choose from * @param dataObject * Some data object you may want to store; can be null */ public ChooserFragment(String title, CharSequence[] options, Object dataObject) { this.title = title; this.options = options; this.dataObject = dataObject; } /** * Default constructor */ public ChooserFragment() { } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); this.setRetainInstance(true); } @Override public Dialog onCreateDialog(Bundle savedInstanceState) { AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); builder.setTitle(title); builder.setItems(options, this); AlertDialog alert = builder.create(); return alert; } @Override public void onClick(DialogInterface dialog, int choice) { mInterface.onChooserFragmentResult(choice, dataObject); } @Override public void onDestroyView() { // Work around bug: // http://code.google.com/p/android/issues/detail?id=17423 Dialog dialog = getDialog(); if ((dialog != null) && getRetainInstance()) { dialog.setDismissMessage(null); } super.onDestroyView(); } } |
Example usage (in Activity)
Java
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// e.g. on LongClick on ListView item CharSequence[] options = {"Choice 0", "Choice 1"}; ChooserFragment chooser = new ChooserFragment("Choose action", options, null); chooser.show(getSupportFragmentManager(), "chooserFragment"); //[...] @Override public void onChooserFragmentResult(int choice, Object dataObject) { Toast.makeText(this, "User chose option No. "+choice, Toast.LENGTH_SHORT); } |
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