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 com.android.documentsui;
18 
19 import android.content.Context;
20 import android.graphics.Rect;
21 import android.util.AttributeSet;
22 import android.util.TypedValue;
23 import android.widget.LinearLayout;
24 
25 /**
26  * Layout for a single item in List mode.  This class overrides the default focus listener in order
27  * to light up a focus indicator when it is focused.
28  */
29 public class ListItem extends LinearLayout
30 {
ListItem(Context context)31     public ListItem(Context context) {
32         super(context);
33     }
34 
ListItem(Context context, AttributeSet attrs)35     public ListItem(Context context, AttributeSet attrs) {
36         super(context, attrs);
37     }
38 
39     @Override
onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect)40     protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
41         TypedValue color = new TypedValue();
42         int colorId = gainFocus ? android.R.attr.colorAccent : android.R.color.transparent;
43         getContext().getTheme().resolveAttribute(colorId, color, true);
44 
45         findViewById(R.id.focus_indicator).setBackgroundColor(color.data);
46         super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);
47     }
48 }
49