| /* |
| * Copyright (C) 2015 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 com.android.permissioncontroller.permission.ui.television; |
| |
| import android.os.Bundle; |
| import android.view.LayoutInflater; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.view.animation.Animation; |
| import android.view.animation.Animation.AnimationListener; |
| import android.view.animation.AnimationUtils; |
| import android.widget.TextView; |
| |
| import androidx.annotation.Nullable; |
| import androidx.leanback.widget.VerticalGridView; |
| import androidx.preference.PreferenceFragmentCompat; |
| import androidx.preference.PreferenceScreen; |
| import androidx.recyclerview.widget.RecyclerView; |
| |
| import com.android.permissioncontroller.R; |
| |
| public abstract class PermissionsFrameFragment extends PreferenceFragmentCompat { |
| |
| // Key identifying the preference used on TV as the extra header in a permission fragment. |
| // This is to distinguish it from the rest of the preferences |
| protected static final String HEADER_PREFERENCE_KEY = "HeaderPreferenceKey"; |
| |
| private ViewGroup mPreferencesContainer; |
| |
| // TV-specific instance variable |
| @Nullable private RecyclerView mGridView; |
| |
| private View mLoadingView; |
| private ViewGroup mPrefsView; |
| private boolean mIsLoading; |
| |
| /** |
| * Returns the view group that holds the preferences objects. This will |
| * only be set after {@link #onCreateView} has been called. |
| */ |
| protected final ViewGroup getPreferencesContainer() { |
| return mPreferencesContainer; |
| } |
| |
| @Override |
| public View onCreateView(LayoutInflater inflater, ViewGroup container, |
| Bundle savedInstanceState) { |
| ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.permissions_frame, container, |
| false); |
| mPrefsView = (ViewGroup) rootView.findViewById(R.id.prefs_container); |
| if (mPrefsView == null) { |
| mPrefsView = rootView; |
| } |
| mLoadingView = rootView.findViewById(R.id.loading_container); |
| mPreferencesContainer = (ViewGroup) super.onCreateView( |
| inflater, mPrefsView, savedInstanceState); |
| setLoading(mIsLoading, false, true /* force */); |
| mPrefsView.addView(mPreferencesContainer); |
| return rootView; |
| } |
| |
| @Override |
| public void onCreatePreferences(Bundle savedInstanceState, String rootKey) { |
| PreferenceScreen preferences = getPreferenceScreen(); |
| if (preferences == null) { |
| preferences = getPreferenceManager().createPreferenceScreen(getActivity()); |
| setPreferenceScreen(preferences); |
| } |
| } |
| |
| protected void setLoading(boolean loading, boolean animate) { |
| setLoading(loading, animate, false); |
| } |
| |
| private void setLoading(boolean loading, boolean animate, boolean force) { |
| if (mIsLoading != loading || force) { |
| mIsLoading = loading; |
| if (getView() == null) { |
| // If there is no created view, there is no reason to animate. |
| animate = false; |
| } |
| if (mPrefsView != null) { |
| setViewShown(mPrefsView, !loading, animate); |
| } |
| if (mLoadingView != null) { |
| setViewShown(mLoadingView, loading, animate); |
| } |
| } |
| } |
| |
| private void setViewShown(final View view, boolean shown, boolean animate) { |
| if (animate) { |
| Animation animation = AnimationUtils.loadAnimation(getContext(), |
| shown ? android.R.anim.fade_in : android.R.anim.fade_out); |
| if (shown) { |
| view.setVisibility(View.VISIBLE); |
| } else { |
| animation.setAnimationListener(new AnimationListener() { |
| @Override |
| public void onAnimationStart(Animation animation) { |
| } |
| |
| @Override |
| public void onAnimationRepeat(Animation animation) { |
| } |
| |
| @Override |
| public void onAnimationEnd(Animation animation) { |
| view.setVisibility(View.INVISIBLE); |
| } |
| }); |
| } |
| view.startAnimation(animation); |
| } else { |
| view.clearAnimation(); |
| view.setVisibility(shown ? View.VISIBLE : View.INVISIBLE); |
| } |
| } |
| |
| @Override |
| public RecyclerView onCreateRecyclerView(LayoutInflater inflater, ViewGroup parent, |
| Bundle savedInstanceState) { |
| VerticalGridView verticalGridView = (VerticalGridView) inflater.inflate( |
| R.layout.leanback_preferences_list, parent, false); |
| verticalGridView.setWindowAlignment(VerticalGridView.WINDOW_ALIGN_BOTH_EDGE); |
| verticalGridView.setFocusScrollStrategy(VerticalGridView.FOCUS_SCROLL_ALIGNED); |
| mGridView = verticalGridView; |
| return mGridView; |
| } |
| |
| @Override |
| protected RecyclerView.Adapter<?> onCreateAdapter(PreferenceScreen preferenceScreen) { |
| final RecyclerView.Adapter<?> adapter = super.onCreateAdapter(preferenceScreen); |
| |
| if (adapter != null) { |
| final TextView emptyView = (TextView) getView().findViewById(R.id.no_permissions); |
| emptyView.setText(R.string.no_permissions); |
| onSetEmptyText(emptyView); |
| final RecyclerView recyclerView = getListView(); |
| adapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() { |
| @Override |
| public void onChanged() { |
| checkEmpty(adapter, recyclerView, emptyView); |
| } |
| |
| @Override |
| public void onItemRangeInserted(int positionStart, int itemCount) { |
| checkEmpty(adapter, recyclerView, emptyView); |
| } |
| |
| @Override |
| public void onItemRangeRemoved(int positionStart, int itemCount) { |
| checkEmpty(adapter, recyclerView, emptyView); |
| } |
| }); |
| |
| checkEmpty(adapter, recyclerView, emptyView); |
| } |
| |
| return adapter; |
| } |
| |
| private void checkEmpty(RecyclerView.Adapter<?> adapter, View recyclerView, View emptyView) { |
| emptyView.postDelayed(() -> { |
| boolean isEmpty = isPreferenceListEmpty(); |
| emptyView.setVisibility(isEmpty ? View.VISIBLE : View.GONE); |
| recyclerView.setVisibility(isEmpty && adapter.getItemCount() == 0 ? |
| View.GONE : View.VISIBLE); |
| if (!isEmpty && mGridView != null) { |
| mGridView.requestFocus(); |
| } |
| }, 250); |
| } |
| |
| private boolean isPreferenceListEmpty() { |
| PreferenceScreen screen = getPreferenceScreen(); |
| return screen.getPreferenceCount() == 0 || ( |
| screen.getPreferenceCount() == 1 && |
| (screen.findPreference(HEADER_PREFERENCE_KEY) != null)); |
| } |
| |
| /** |
| * Hook for subclasses to change the default text of the empty view. |
| * Base implementation leaves the default empty view text. |
| * |
| * @param textView the empty text view |
| */ |
| protected void onSetEmptyText(TextView textView) { |
| } |
| } |