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. - * - *
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); - } -}