Java tutorial
/* * Copyright 2015 Qianqian Zhu <zhuqianqian.299@gmail.com> All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.z299studio.pb; import android.os.Bundle; import android.support.v4.app.DialogFragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.CheckBox; import android.widget.Spinner; public class DeleteCategory extends DialogFragment implements View.OnClickListener, AdapterView.OnItemSelectedListener { public interface OnDeleteConfirmListener { void onConfirmed(int category, boolean alsoDelAccounts); } private int mPosition = -1; private int mCategory; OnDeleteConfirmListener mListener; private CheckBox mCheckBox; public DeleteCategory() { } public DeleteCategory setCategory(int category) { mCategory = category; return this; } public DeleteCategory setListener(OnDeleteConfirmListener l) { mListener = l; return this; } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView; if (Application.getInstance() == null || Application.getInstance().getAccountManager() == null) { return null; } if (savedInstanceState != null) { mPosition = savedInstanceState.getInt("category"); } rootView = inflater.inflate(R.layout.dialog_delete_category, container); Button button = (Button) rootView.findViewById(R.id.ok); button.setOnClickListener(this); button = (Button) rootView.findViewById(R.id.cancel); button.setOnClickListener(this); Spinner spinner = (Spinner) rootView.findViewById(R.id.spinner); String[] allNames = Application.getInstance().getSortedCategoryNames(); String[] deletableNames = new String[allNames.length - 1]; int i, j = 0; for (i = 1; i < allNames.length; ++i) { deletableNames[j++] = allNames[i]; } if (mPosition < 0) { int[] allIds = Application.getInstance().getSortedCategoryIds(); for (i = 1; i < allIds.length; ++i) { if (mCategory == allIds[i]) { mPosition = i; break; } } mPosition -= 1; if (mPosition < 0) { mPosition = 0; } } ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<>(getActivity(), android.R.layout.simple_spinner_dropdown_item, deletableNames); spinner.setAdapter(spinnerAdapter); spinner.setSelection(mPosition); spinner.setOnItemSelectedListener(this); mCheckBox = (CheckBox) rootView.findViewById(R.id.checkbox); return rootView; } @Override public void onSaveInstanceState(Bundle outState) { outState.putInt("category", mPosition); super.onSaveInstanceState(outState); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.ok: if (mListener != null) { mListener.onConfirmed(mCategory, mCheckBox.isChecked()); } this.dismiss(); break; case R.id.cancel: this.dismiss(); break; } } @Override public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) { mPosition = pos; mCategory = Application.getInstance().getSortedCategoryIds()[pos + 1]; } @Override public void onNothingSelected(AdapterView<?> parent) { } }