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      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.support.v7.widget.RecyclerView;
     20 import android.support.v17.leanback.widget.HorizontalGridView;
     21 import android.support.v17.leanback.widget.OnChildSelectedListener;
     22 import android.app.Activity;
     23 import android.content.Context;
     24 import android.content.Intent;
     25 import android.graphics.BitmapFactory;
     26 import android.graphics.Color;
     27 import android.graphics.drawable.ColorDrawable;
     28 import android.graphics.drawable.Drawable;
     29 import android.net.Uri;
     30 import android.os.Bundle;
     31 import android.util.Log;
     32 import android.util.SparseArray;
     33 import android.view.MotionEvent;
     34 import android.view.View;
     35 import android.view.View.OnClickListener;
     36 import android.view.View.OnFocusChangeListener;
     37 import android.view.ViewGroup;
     38 import android.widget.ImageView;
     39 import android.widget.TextView;
     40 
     41 import java.io.File;
     42 
     43 public class HorizontalGridTestActivity extends Activity {
     44     private static final String TAG = "HorizontalGridTestActivity";
     45     private static final boolean DEBUG = true;
     46     private static final String SELECT_ACTION = "android.test.leanback.widget.SELECT";
     47     private static final int NUM_ITEMS = 100;
     48     private static final boolean STAGGERED = true;
     49 
     50     private HorizontalGridView mHorizontalGridView;
     51     private int mScrollState = RecyclerView.SCROLL_STATE_IDLE;
     52 
     53     private RecyclerView.OnScrollListener mScrollListener = new RecyclerView.OnScrollListener() {
     54         @Override
     55         public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
     56             if (DEBUG) {
     57                 final String[] stateNames = { "IDLE", "DRAGGING", "SETTLING" };
     58                 Log.v(TAG, "onScrollStateChanged "
     59                         + (newState < stateNames.length ? stateNames[newState] : newState));
     60             }
     61             mScrollState = newState;
     62         }
     63     };
     64 
     65     private View createView() {
     66         View view = getLayoutInflater().inflate(R.layout.horizontal_grid, null, false);
     67         mHorizontalGridView = (HorizontalGridView) view.findViewById(R.id.gridview);
     68 
     69         mHorizontalGridView.setWindowAlignment(HorizontalGridView.WINDOW_ALIGN_BOTH_EDGE);
     70         mHorizontalGridView.setWindowAlignmentOffsetPercent(35);
     71         mHorizontalGridView.setOnChildSelectedListener(new OnChildSelectedListener() {
     72             @Override
     73             public void onChildSelected(ViewGroup parent, View view, int position, long id) {
     74                 if (DEBUG) Log.d(TAG, "onChildSelected position=" + position +  " id="+id);
     75             }
     76         });
     77         return view;
     78     }
     79 
     80     @Override
     81     protected void onCreate(Bundle savedInstanceState) {
     82         super.onCreate(savedInstanceState);
     83 
     84         if (DEBUG) Log.v(TAG, "onCreate");
     85 
     86         RecyclerView.Adapter adapter = new MyAdapter();
     87 
     88         View view = createView();
     89 
     90         mHorizontalGridView.setAdapter(new MyAdapter());
     91         setContentView(view);
     92 
     93         mHorizontalGridView.setOnScrollListener(mScrollListener);
     94     }
     95 
     96     @Override
     97     protected void onNewIntent(Intent intent) {
     98         if (DEBUG) Log.v(TAG, "onNewIntent " + intent);
     99         if (intent.getAction().equals(SELECT_ACTION)) {
    100             int position = intent.getIntExtra("SELECT_POSITION", -1);
    101             if (position >= 0) {
    102                 mHorizontalGridView.setSelectedPosition(position);
    103             }
    104         }
    105         super.onNewIntent(intent);
    106     }
    107 
    108     private OnFocusChangeListener mItemFocusChangeListener = new OnFocusChangeListener() {
    109 
    110         @Override
    111         public void onFocusChange(View v, boolean hasFocus) {
    112             if (hasFocus) {
    113                 v.setBackgroundColor(Color.YELLOW);
    114             } else {
    115                 v.setBackgroundColor(Color.LTGRAY);
    116             }
    117         }
    118     };
    119 
    120     private OnClickListener mItemClickListener = new OnClickListener() {
    121         @Override
    122         public void onClick(View v) {
    123             mHorizontalGridView.getAdapter().notifyDataSetChanged();
    124         }
    125     };
    126 
    127     class MyAdapter extends RecyclerView.Adapter {
    128 
    129         private int[] mItemLengths;
    130 
    131         MyAdapter() {
    132             mItemLengths = new int[NUM_ITEMS];
    133             for (int i = 0; i < mItemLengths.length; i++) {
    134                 mItemLengths[i] = STAGGERED ? (int)(Math.random() * 180) + 180 : 240;
    135             }
    136         }
    137 
    138         @Override
    139         public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    140             if (DEBUG) Log.v(TAG, "createViewHolder " + viewType);
    141             TextView textView = new TextView(parent.getContext());
    142             textView.setTextColor(Color.BLACK);
    143             textView.setFocusable(true);
    144             textView.setFocusableInTouchMode(true);
    145             textView.setOnFocusChangeListener(mItemFocusChangeListener);
    146             textView.setOnClickListener(mItemClickListener);
    147             return new ViewHolder(textView);
    148         }
    149 
    150         @Override
    151         public void onBindViewHolder(RecyclerView.ViewHolder baseHolder, int position) {
    152             if (DEBUG) Log.v(TAG, "bindViewHolder " + position + " " + baseHolder);
    153             ViewHolder holder = (ViewHolder) baseHolder;
    154             ((TextView) holder.itemView).setText("Item "+position);
    155             holder.itemView.setBackgroundColor(Color.LTGRAY);
    156             holder.itemView.setLayoutParams(new ViewGroup.MarginLayoutParams(mItemLengths[position],
    157                     80));
    158         }
    159 
    160         @Override
    161         public int getItemCount() {
    162             return mItemLengths.length;
    163         }
    164     }
    165 
    166     static class ViewHolder extends RecyclerView.ViewHolder {
    167 
    168         public ViewHolder(View v) {
    169             super(v);
    170         }
    171     }
    172 }
    173