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Merge pull request getodk#480 from dcbriccetti/303-activities-checkab…
…le-lists getodk#303, Remove extra state and use Android APIs in activities with checkable lists getodk#441, Refactor preference classes
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collect_app/src/main/java/org/odk/collect/android/activities/AppListActivity.java
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| /* | ||
| * Copyright 2017 Nafundi | ||
| * | ||
| * 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. | ||
| */ | ||
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| package org.odk.collect.android.activities; | ||
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| import android.app.ListActivity; | ||
| import android.widget.Button; | ||
| import android.widget.ListView; | ||
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| import org.odk.collect.android.R; | ||
| import org.odk.collect.android.application.Collect; | ||
| import org.odk.collect.android.database.ActivityLogger; | ||
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| abstract class AppListActivity extends ListActivity { | ||
| protected final ActivityLogger logger = Collect.getInstance().getActivityLogger(); | ||
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| protected boolean areCheckedItems() { | ||
| return getCheckedCount() > 0; | ||
| } | ||
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| /** Returns the IDs of the checked items, using the ListView of this activity. */ | ||
| protected long[] getCheckedIds() { | ||
| return getCheckedIds(getListView()); | ||
| } | ||
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| /** Returns the IDs of the checked items, using the ListView provided */ | ||
| protected long[] getCheckedIds(ListView lv) { | ||
| // This method could be simplified by using getCheckedItemIds, if one ensured that | ||
| // IDs were “stable” (see the getCheckedItemIds doc). | ||
| int itemCount = lv.getCount(); | ||
| int checkedItemCount = lv.getCheckedItemCount(); | ||
| long[] checkedIds = new long[checkedItemCount]; | ||
| int resultIndex = 0; | ||
| for (int posIdx = 0; posIdx < itemCount; posIdx++) { | ||
| if (lv.isItemChecked(posIdx)) { | ||
| checkedIds [resultIndex] = lv.getItemIdAtPosition(posIdx); | ||
| resultIndex++; | ||
| } | ||
| } | ||
| return checkedIds; | ||
| } | ||
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| /** Returns the IDs of the checked items, as an array of Long */ | ||
| protected Long[] getCheckedIdObjects() { | ||
| long[] checkedIds = getCheckedIds(); | ||
| Long[] checkedIdObjects = new Long[checkedIds.length]; | ||
| for (int i = 0; i < checkedIds.length; i++) { | ||
| checkedIdObjects[i] = checkedIds[i]; | ||
| } | ||
| return checkedIdObjects; | ||
| } | ||
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| protected int getCheckedCount() { | ||
| return getListView().getCheckedItemCount(); | ||
| } | ||
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| // toggles to all checked or all unchecked | ||
| // returns: | ||
| // true if result is all checked | ||
| // false if result is all unchecked | ||
| // | ||
| // Toggle behavior is as follows: | ||
| // if ANY items are unchecked, check them all | ||
| // if ALL items are checked, uncheck them all | ||
| public static boolean toggleChecked(ListView lv) { | ||
| // shortcut null case | ||
| if (lv == null) return false; | ||
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| boolean newCheckState = lv.getCount() > lv.getCheckedItemCount(); | ||
| setAllToCheckedState(lv, newCheckState); | ||
| return newCheckState; | ||
| } | ||
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| public static void setAllToCheckedState(ListView lv, boolean check) { | ||
| // no-op if ListView null | ||
| if (lv == null) return; | ||
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| for (int x = 0; x < lv.getCount(); x++) { | ||
| lv.setItemChecked(x, check); | ||
| } | ||
| } | ||
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| // Function to toggle button label | ||
| public static void toggleButtonLabel(Button mToggleButton, ListView lv) { | ||
| if (lv.getCheckedItemCount() != lv.getCount()) { | ||
| mToggleButton.setText(R.string.select_all); | ||
| } else { | ||
| mToggleButton.setText(R.string.clear_all); | ||
| } | ||
| } | ||
| } |
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