Home | History | Annotate | Download | only in leanback 
      1 /*
      2  * Copyright (C) 2013 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 com.example.android.leanback;
     18 
     19 import android.app.Activity;
     20 import android.content.Intent;
     21 import android.graphics.Color;
     22 import android.os.Bundle;
     23 import android.support.v17.leanback.widget.HorizontalGridView;
     24 import android.support.v17.leanback.widget.OnChildViewHolderSelectedListener;
     25 import android.support.v7.widget.RecyclerView;
     26 import android.util.Log;
     27 import android.view.View;
     28 import android.view.View.OnClickListener;
     29 import android.view.View.OnFocusChangeListener;
     30 import android.view.ViewGroup;
     31 import android.widget.TextView;
     32 
     33 public class HorizontalGridTestActivity extends Activity {
     34     private static final String TAG = "HorizontalGridTestActivity";
     35     private static final boolean DEBUG = true;
     36     private static final String SELECT_ACTION = "android.test.leanback.widget.SELECT";
     37     private static final int NUM_ITEMS = 100;
     38     private static final boolean STAGGERED = true;
     39 
     40     private HorizontalGridView mHorizontalGridView;
     41 
     42     private RecyclerView.OnScrollListener mScrollListener = new RecyclerView.OnScrollListener() {
     43         @Override
     44         public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
     45             if (DEBUG) {
     46                 final String[] stateNames = { "IDLE", "DRAGGING", "SETTLING" };
     47                 Log.v(TAG, "onScrollStateChanged "
     48                         + (newState < stateNames.length ? stateNames[newState] : newState));
     49             }
     50         }
     51     };
     52 
     53     private View createView() {
     54         View view = getLayoutInflater().inflate(R.layout.horizontal_grid, null, false);
     55         mHorizontalGridView = (HorizontalGridView) view.findViewById(R.id.gridview);
     56 
     57         mHorizontalGridView.setWindowAlignment(HorizontalGridView.WINDOW_ALIGN_BOTH_EDGE);
     58         mHorizontalGridView.setWindowAlignmentOffsetPercent(35);
     59         mHorizontalGridView.setOnChildViewHolderSelectedListener(
     60                 new OnChildViewHolderSelectedListener() {
     61                     @Override
     62                     public void onChildViewHolderSelected(RecyclerView parent,
     63                                                           RecyclerView.ViewHolder child,
     64                                                           int position, int subposition) {
     65                         if (DEBUG) Log.d(TAG, "onChildSelected position=" + position);
     66                     }
     67 
     68                 });
     69         return view;
     70     }
     71 
     72     @Override
     73     protected void onCreate(Bundle savedInstanceState) {
     74         super.onCreate(savedInstanceState);
     75 
     76         if (DEBUG) Log.v(TAG, "onCreate");
     77 
     78         RecyclerView.Adapter adapter = new MyAdapter();
     79 
     80         View view = createView();
     81 
     82         mHorizontalGridView.setAdapter(new MyAdapter());
     83         setContentView(view);
     84 
     85         mHorizontalGridView.addOnScrollListener(mScrollListener);
     86     }
     87 
     88     @Override
     89     protected void onNewIntent(Intent intent) {
     90         if (DEBUG) Log.v(TAG, "onNewIntent " + intent);
     91         if (intent.getAction().equals(SELECT_ACTION)) {
     92             int position = intent.getIntExtra("SELECT_POSITION", -1);
     93             if (position >= 0) {
     94                 mHorizontalGridView.setSelectedPosition(position);
     95             }
     96         }
     97         super.onNewIntent(intent);
     98     }
     99 
    100     private OnFocusChangeListener mItemFocusChangeListener = new OnFocusChangeListener() {
    101 
    102         @Override
    103         public void onFocusChange(View v, boolean hasFocus) {
    104             if (hasFocus) {
    105                 v.setBackgroundColor(Color.YELLOW);
    106             } else {
    107                 v.setBackgroundColor(Color.LTGRAY);
    108             }
    109         }
    110     };
    111 
    112     private OnClickListener mItemClickListener = new OnClickListener() {
    113         @Override
    114         public void onClick(View v) {
    115             mHorizontalGridView.getAdapter().notifyDataSetChanged();
    116         }
    117     };
    118 
    119     class MyAdapter extends RecyclerView.Adapter {
    120 
    121         private int[] mItemLengths;
    122 
    123         MyAdapter() {
    124             mItemLengths = new int[NUM_ITEMS];
    125             for (int i = 0; i < mItemLengths.length; i++) {
    126                 mItemLengths[i] = STAGGERED ? (int)(Math.random() * 180) + 180 : 240;
    127             }
    128         }
    129 
    130         @Override
    131         public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    132             if (DEBUG) Log.v(TAG, "createViewHolder " + viewType);
    133             TextView textView = new TextView(parent.getContext());
    134             textView.setTextColor(Color.BLACK);
    135             textView.setFocusable(true);
    136             textView.setFocusableInTouchMode(true);
    137             textView.setOnFocusChangeListener(mItemFocusChangeListener);
    138             textView.setOnClickListener(mItemClickListener);
    139             return new ViewHolder(textView);
    140         }
    141 
    142         @Override
    143         public void onBindViewHolder(RecyclerView.ViewHolder baseHolder, int position) {
    144             if (DEBUG) Log.v(TAG, "bindViewHolder " + position + " " + baseHolder);
    145             ViewHolder holder = (ViewHolder) baseHolder;
    146             ((TextView) holder.itemView).setText("Item "+position);
    147             holder.itemView.setBackgroundColor(Color.LTGRAY);
    148             holder.itemView.setLayoutParams(new ViewGroup.MarginLayoutParams(mItemLengths[position],
    149                     80));
    150         }
    151 
    152         @Override
    153         public int getItemCount() {
    154             return mItemLengths.length;
    155         }
    156     }
    157 
    158     static class ViewHolder extends RecyclerView.ViewHolder {
    159 
    160         public ViewHolder(View v) {
    161             super(v);
    162         }
    163     }
    164 }
    165