1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.leanbackjank.app.presenter; 18 19 import android.content.Context; 20 import android.graphics.drawable.Drawable; 21 import androidx.leanback.widget.HeaderItem; 22 import androidx.leanback.widget.ListRow; 23 import androidx.leanback.widget.Presenter; 24 import androidx.leanback.widget.RowHeaderPresenter; 25 import android.view.LayoutInflater; 26 import android.view.View; 27 import android.view.ViewGroup; 28 import android.widget.ImageView; 29 import android.widget.TextView; 30 31 import android.leanbackjank.app.R; 32 33 public class IconHeaderItemPresenter extends RowHeaderPresenter { 34 private float mUnselectedAlpha; 35 36 @Override onCreateViewHolder(ViewGroup viewGroup)37 public ViewHolder onCreateViewHolder(ViewGroup viewGroup) { 38 mUnselectedAlpha = viewGroup.getResources() 39 .getFraction(R.fraction.lb_browse_header_unselect_alpha, 1, 1); 40 LayoutInflater inflater = (LayoutInflater) viewGroup.getContext() 41 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 42 43 View view = inflater.inflate(R.layout.icon_header_item, null); 44 45 return new ViewHolder(view); 46 } 47 48 @Override onBindViewHolder(Presenter.ViewHolder viewHolder, Object o)49 public void onBindViewHolder(Presenter.ViewHolder viewHolder, Object o) { 50 HeaderItem headerItem = ((ListRow) o).getHeaderItem(); 51 View rootView = viewHolder.view; 52 53 ImageView iconView = (ImageView) rootView.findViewById(R.id.header_icon); 54 Drawable icon = rootView.getResources().getDrawable(R.drawable.android_header, null); 55 iconView.setImageDrawable(icon); 56 57 TextView label = (TextView) rootView.findViewById(R.id.header_label); 58 label.setText(headerItem.getName()); 59 } 60 61 @Override onUnbindViewHolder(Presenter.ViewHolder viewHolder)62 public void onUnbindViewHolder(Presenter.ViewHolder viewHolder) { 63 } 64 65 // TODO: TEMP - remove me when leanback onCreateViewHolder no longer sets the mUnselectAlpha,AND 66 // also assumes the xml inflation will return a RowHeaderView 67 @Override onSelectLevelChanged(RowHeaderPresenter.ViewHolder holder)68 protected void onSelectLevelChanged(RowHeaderPresenter.ViewHolder holder) { 69 // this is a temporary fix 70 holder.view.setAlpha(mUnselectedAlpha + holder.getSelectLevel() * 71 (1.0f - mUnselectedAlpha)); 72 } 73 } 74