--- /dev/null
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * 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 android.support.v2.app;
+
+import android.os.Bundle;
+import android.os.Handler;
+import android.view.Gravity;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.animation.AnimationUtils;
+import android.widget.AdapterView;
+import android.widget.FrameLayout;
+import android.widget.ListAdapter;
+import android.widget.ListView;
+import android.widget.TextView;
+
+/**
+ * Static library support version of the framework's {@link android.app.ListFragment}.
+ * Used to write apps that run on platforms prior to Android 3.0. When running
+ * on Android 3.0 or above, this implementation is still used; it does not try
+ * to switch to the framework's implementation. See the framework SDK
+ * documentation for a class overview.
+ */
+public class ListFragment extends Fragment {
+ static final int INTERNAL_EMPTY_ID = 0x00ff0001;
+
+ final private Handler mHandler = new Handler();
+
+ final private Runnable mRequestFocus = new Runnable() {
+ public void run() {
+ mList.focusableViewAvailable(mList);
+ }
+ };
+
+ final private AdapterView.OnItemClickListener mOnClickListener
+ = new AdapterView.OnItemClickListener() {
+ public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
+ onListItemClick((ListView)parent, v, position, id);
+ }
+ };
+
+ ListAdapter mAdapter;
+ ListView mList;
+ View mEmptyView;
+ TextView mStandardEmptyView;
+ View mProgressContainer;
+ View mListContainer;
+ boolean mSetEmptyText;
+ boolean mListShown;
+
+ public ListFragment() {
+ }
+
+ /**
+ * Provide default implementation to return a simple list view. Subclasses
+ * can override to replace with their own layout. If doing so, the
+ * returned view hierarchy <em>must</em> have a ListView whose id
+ * is {@link android.R.id#list android.R.id.list} and can optionally
+ * have a sibling view id {@link android.R.id#empty android.R.id.empty}
+ * that is to be shown when the list is empty.
+ *
+ * <p>If you are overriding this method with your own custom content,
+ * consider including the standard layout {@link android.R.layout#list_content}
+ * in your layout file, so that you continue to retain all of the standard
+ * behavior of ListFragment. In particular, this is currently the only
+ * way to have the built-in indeterminant progress state be shown.
+ */
+ @Override
+ public View onCreateView(LayoutInflater inflater, ViewGroup container,
+ Bundle savedInstanceState) {
+ FrameLayout root = new FrameLayout(getActivity());
+
+ TextView tv = new TextView(getActivity());
+ tv.setId(INTERNAL_EMPTY_ID);
+ tv.setGravity(Gravity.CENTER);
+ root.addView(tv, new FrameLayout.LayoutParams(
+ ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT));
+
+ ListView lv = new ListView(getActivity());
+ lv.setId(android.R.id.list);
+ lv.setDrawSelectorOnTop(false);
+ root.addView(lv, new FrameLayout.LayoutParams(
+ ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT));
+
+ ListView.LayoutParams lp = new ListView.LayoutParams(
+ ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT);
+ root.setLayoutParams(lp);
+
+ return root;
+ }
+
+ /**
+ * Attach to list view once Fragment is ready to run.
+ */
+ @Override
+ public void onActivityCreated(Bundle savedInstanceState) {
+ super.onActivityCreated(savedInstanceState);
+ ensureList();
+ }
+
+ /**
+ * Detach from list view.
+ */
+ @Override
+ public void onDestroyView() {
+ mHandler.removeCallbacks(mRequestFocus);
+ mList = null;
+ super.onDestroyView();
+ }
+
+ /**
+ * This method will be called when an item in the list is selected.
+ * Subclasses should override. Subclasses can call
+ * getListView().getItemAtPosition(position) if they need to access the
+ * data associated with the selected item.
+ *
+ * @param l The ListView where the click happened
+ * @param v The view that was clicked within the ListView
+ * @param position The position of the view in the list
+ * @param id The row id of the item that was clicked
+ */
+ public void onListItemClick(ListView l, View v, int position, long id) {
+ }
+
+ /**
+ * Provide the cursor for the list view.
+ */
+ public void setListAdapter(ListAdapter adapter) {
+ boolean hadAdapter = mAdapter != null;
+ mAdapter = adapter;
+ if (mList != null) {
+ mList.setAdapter(adapter);
+ if (!mListShown && !hadAdapter) {
+ // The list was hidden, and previously didn't have an
+ // adapter. It is now time to show it.
+ setListShown(true, getView().getWindowToken() != null);
+ }
+ }
+ }
+
+ /**
+ * Set the currently selected list item to the specified
+ * position with the adapter's data
+ *
+ * @param position
+ */
+ public void setSelection(int position) {
+ ensureList();
+ mList.setSelection(position);
+ }
+
+ /**
+ * Get the position of the currently selected list item.
+ */
+ public int getSelectedItemPosition() {
+ ensureList();
+ return mList.getSelectedItemPosition();
+ }
+
+ /**
+ * Get the cursor row ID of the currently selected list item.
+ */
+ public long getSelectedItemId() {
+ ensureList();
+ return mList.getSelectedItemId();
+ }
+
+ /**
+ * Get the activity's list view widget.
+ */
+ public ListView getListView() {
+ ensureList();
+ return mList;
+ }
+
+ /**
+ * The default content for a ListFragment has a TextView that can
+ * be shown when the list is empty. If you would like to have it
+ * shown, call this method to supply the text it should use.
+ */
+ public void setEmptyText(CharSequence text) {
+ ensureList();
+ if (mStandardEmptyView == null) {
+ throw new IllegalStateException("Can't be used with a custom content view");
+ }
+ mStandardEmptyView.setText(text);
+ if (!mSetEmptyText) {
+ mList.setEmptyView(mStandardEmptyView);
+ mSetEmptyText = true;
+ }
+ }
+
+ /**
+ * Control whether the list is being displayed. You can make it not
+ * displayed if you are waiting for the initial data to show in it. During
+ * this time an indeterminant progress indicator will be shown instead.
+ *
+ * <p>Applications do not normally need to use this themselves. The default
+ * behavior of ListFragment is to start with the list not being shown, only
+ * showing it once an adapter is given with {@link #setListAdapter(ListAdapter)}.
+ * If the list at that point had not been shown, when it does get shown
+ * it will be do without the user ever seeing the hidden state.
+ *
+ * @param shown If true, the list view is shown; if false, the progress
+ * indicator. The initial value is true.
+ */
+ public void setListShown(boolean shown) {
+ setListShown(shown, true);
+ }
+
+ /**
+ * Like {@link #setListShown(boolean)}, but no animation is used when
+ * transitioning from the previous state.
+ */
+ public void setListShownNoAnimation(boolean shown) {
+ setListShown(shown, false);
+ }
+
+ /**
+ * Control whether the list is being displayed. You can make it not
+ * displayed if you are waiting for the initial data to show in it. During
+ * this time an indeterminant progress indicator will be shown instead.
+ *
+ * @param shown If true, the list view is shown; if false, the progress
+ * indicator. The initial value is true.
+ * @param animate If true, an animation will be used to transition to the
+ * new state.
+ */
+ private void setListShown(boolean shown, boolean animate) {
+ ensureList();
+ if (mProgressContainer == null) {
+ throw new IllegalStateException("Can't be used with a custom content view");
+ }
+ if (mListShown == shown) {
+ return;
+ }
+ mListShown = shown;
+ if (shown) {
+ if (animate) {
+ mProgressContainer.startAnimation(AnimationUtils.loadAnimation(
+ getActivity(), android.R.anim.fade_out));
+ mListContainer.startAnimation(AnimationUtils.loadAnimation(
+ getActivity(), android.R.anim.fade_in));
+ }
+ mProgressContainer.setVisibility(View.GONE);
+ mListContainer.setVisibility(View.VISIBLE);
+ } else {
+ if (animate) {
+ mProgressContainer.startAnimation(AnimationUtils.loadAnimation(
+ getActivity(), android.R.anim.fade_in));
+ mListContainer.startAnimation(AnimationUtils.loadAnimation(
+ getActivity(), android.R.anim.fade_out));
+ }
+ mProgressContainer.setVisibility(View.VISIBLE);
+ mListContainer.setVisibility(View.GONE);
+ }
+ }
+
+ /**
+ * Get the ListAdapter associated with this activity's ListView.
+ */
+ public ListAdapter getListAdapter() {
+ return mAdapter;
+ }
+
+ private void ensureList() {
+ if (mList != null) {
+ return;
+ }
+ View root = getView();
+ if (root == null) {
+ throw new IllegalStateException("Content view not yet created");
+ }
+ if (root instanceof ListView) {
+ mList = (ListView)root;
+ } else {
+ mStandardEmptyView = (TextView)root.findViewById(INTERNAL_EMPTY_ID);
+ if (mStandardEmptyView == null) {
+ mEmptyView = root.findViewById(android.R.id.empty);
+ }
+ mProgressContainer = null; //root.findViewById(com.android.internal.R.id.progressContainer);
+ mListContainer = null; //root.findViewById(com.android.internal.R.id.listContainer);
+ View rawListView = root.findViewById(android.R.id.list);
+ if (!(rawListView instanceof ListView)) {
+ if (rawListView == null) {
+ throw new RuntimeException(
+ "Your content must have a ListView whose id attribute is " +
+ "'android.R.id.list'");
+ }
+ throw new RuntimeException(
+ "Content has view with id attribute 'android.R.id.list' "
+ + "that is not a ListView class");
+ }
+ mList = (ListView)rawListView;
+ if (mEmptyView != null) {
+ mList.setEmptyView(mEmptyView);
+ }
+ }
+ mListShown = true;
+ mList.setOnItemClickListener(mOnClickListener);
+ if (mAdapter != null) {
+ setListAdapter(mAdapter);
+ } else {
+ // We are starting without an adapter, so assume we won't
+ // have our data right away and start with the progress indicator.
+ if (mProgressContainer != null) {
+ setListShown(false, false);
+ }
+ }
+ mHandler.post(mRequestFocus);
+ }
+}
notaz.gp2x.de / android_pandora.git / blobdiff