626 lines
29 KiB
HTML
626 lines
29 KiB
HTML
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<title>Custom item layout - NoNonsense FilePicker</title>
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<meta name="generator" content="Hugo 0.16" />
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<meta name="description" content="An extensible and flexible file-picker for Android.">
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<link rel="canonical" href="http://spacecowboy.github.io/NoNonsense-FilePicker/example/custom_item_layout/">
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<style>
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@font-face {
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font-family: 'Icon';
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src: url('http://spacecowboy.github.io/NoNonsense-FilePicker/fonts/icon.eot?52m981');
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src: url('http://spacecowboy.github.io/NoNonsense-FilePicker/fonts/icon.eot?#iefix52m981')
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format('embedded-opentype'),
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url('http://spacecowboy.github.io/NoNonsense-FilePicker/fonts/icon.woff?52m981')
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format('woff'),
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url('http://spacecowboy.github.io/NoNonsense-FilePicker/fonts/icon.ttf?52m981')
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format('truetype'),
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format('svg');
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<link rel="stylesheet" href="//fonts.googleapis.com/css?family=Roboto:400,700|Roboto%2bMono">
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<style>
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body, input {
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font-family: 'Roboto', Helvetica, Arial, sans-serif;
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pre, code {
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font-family: 'Roboto Mono', 'Courier New', 'Courier', monospace;
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</style>
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<script src="http://spacecowboy.github.io/NoNonsense-FilePicker/javascripts/modernizr.js"></script>
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<body class="palette-primary-red palette-accent-light green">
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<div class="backdrop">
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<div class="backdrop-paper"></div>
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</div>
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<input class="toggle" type="checkbox" id="toggle-drawer">
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<input class="toggle" type="checkbox" id="toggle-search">
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<label class="toggle-button overlay" for="toggle-drawer"></label>
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<header class="header">
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<nav aria-label="Header">
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<div class="bar default">
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<div class="button button-menu" role="button" aria-label="Menu">
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<label class="toggle-button icon icon-menu" for="toggle-drawer">
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<span></span>
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</label>
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</div>
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<div class="stretch">
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<div class="title">
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Custom item layout
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</div>
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<div class="button button-github" role="button" aria-label="GitHub">
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<a href="https://github.com/spacecowboy" title="@spacecowboy on GitHub" target="_blank" class="toggle-button icon icon-github"></a>
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<div class="bar search">
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<div class="button button-close" role="button" aria-label="Close">
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<label class="toggle-button icon icon-back" for="toggle-search"></label>
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</div>
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<div class="stretch">
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<div class="field">
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<input class="query" type="text" placeholder="Search" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck>
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</div>
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</div>
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<div class="button button-reset" role="button" aria-label="Search">
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<button class="toggle-button icon icon-close" id="reset-search"></button>
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<div class="name">
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<strong>NoNonsense FilePicker </strong>
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<br>
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spacecowboy/NoNonsense-FilePicker
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<a href="https://github.com/spacecowboy/NoNonsense-FilePicker/archive/master.zip" target="_blank" title="Download" data-action="download">
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<i class="icon icon-star"></i> Stars
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<li>
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<a title="Readme" href="http://spacecowboy.github.io/NoNonsense-FilePicker/readme/">
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Readme
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</a>
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<li>
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<a title="Changelog" href="http://spacecowboy.github.io/NoNonsense-FilePicker/changelog/">
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Changelog
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</a>
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<li>
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<a title="License" href="http://spacecowboy.github.io/NoNonsense-FilePicker/license/">
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License
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</a>
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</li>
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<li>
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<span class="section">Examples</span>
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<ul>
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<a title="Change the sort order" href="http://spacecowboy.github.io/NoNonsense-FilePicker/example/sortorder/">
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Change the sort order
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</a>
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<a title="Filter based on file extension" href="http://spacecowboy.github.io/NoNonsense-FilePicker/example/filter_file_extension/">
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Filter based on file extension
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</a>
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<a class="current" title="Custom item layout" href="http://spacecowboy.github.io/NoNonsense-FilePicker/example/custom_item_layout/">
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Custom item layout
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</a>
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<ul id="scrollspy">
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</ul>
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<a title="Override the back button" href="http://spacecowboy.github.io/NoNonsense-FilePicker/example/override_back_button/">
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Override the back button
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</a>
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<a title="Override selection behavior" href="http://spacecowboy.github.io/NoNonsense-FilePicker/example/override_selection_behavior/">
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Override selection behavior
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</a>
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<a title="Standalone fragment" href="http://spacecowboy.github.io/NoNonsense-FilePicker/example/standalone_fragment/">
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Standalone fragment
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</a>
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</ul>
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</li>
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</ul>
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<hr>
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<span class="section">The author</span>
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<ul>
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<li>
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<a href="https://github.com/spacecowboy" target="_blank" title="@spacecowboy on GitHub">
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@spacecowboy on GitHub
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</a>
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</li>
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</ul>
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</div>
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</div>
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</div>
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</nav>
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</div>
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<article class="article">
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<div class="wrapper">
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<h1>Custom item layout </h1>
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<p>Say you want to browse some files which have really long names. By default, filenames will be cut if they exceed one line in width like <code>ThisIsAReallyLongFi...</code>. What if we really wanted it show like in this image?</p>
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<p><img src="http://spacecowboy.github.io/NoNonsense-FilePicker/screenshots/itemlayout_longfilename.png" alt="Example of a long filename" /></p>
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<p>The behavior of the text is defined in the listitem layouts:
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<a href="https://github.com/spacecowboy/NoNonsense-FilePicker/blob/master/library/src/main/res/layout/nnf_filepicker_listitem_checkable.xml">nnf_filepicker_listitem_checkable</a>
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and
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<a href="https://github.com/spacecowboy/NoNonsense-FilePicker/blob/master/library/src/main/res/layout/nnf_filepicker_listitem_dir.xml">nnf_filepicker_listitem_dir</a>.</p>
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<p>There are two kinds of layouts, one with a checkbox to allow selection, and one without a checkbox. The second one is also used for the special header item <code>..</code> though you could of course have a special layout for that if you wanted.</p>
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<h3 id="layouts">Layouts</h3>
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<p>Let’s create some new layouts which will support longer filenames as follows:</p>
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<p><strong>longer_listitem_checkable.xml</strong></p>
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<div class="highlight" style="background: #f0f0f0"><pre style="line-height: 125%"><span></span><span style="color: #007020"><?xml version="1.0" encoding="utf-8"?></span>
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<span style="color: #062873; font-weight: bold"><LinearLayout</span> <span style="color: #4070a0">xmlns:android="http://schemas.android.com/apk/res/android"</span>
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<span style="color: #4070a0">xmlns:tools="http://schemas.android.com/tools"</span>
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<span style="color: #4070a0">android:layout_width="match_parent"</span>
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<span style="color: #4070a0">android:layout_height="wrap_content"</span>
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<span style="color: #4070a0">android:background="?android:selectableItemBackground"</span>
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<span style="color: #4070a0">android:minHeight="?android:listPreferredItemHeight"</span>
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<span style="color: #4070a0">android:orientation="horizontal"</span><span style="color: #062873; font-weight: bold">></span>
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<span style="color: #60a0b0; font-style: italic"><!--suppress AndroidDomInspection --></span>
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<span style="color: #062873; font-weight: bold"><ImageView</span>
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<span style="color: #4070a0">android:id="@+id/item_icon"</span>
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<span style="color: #4070a0">android:layout_width="?android:listPreferredItemHeight"</span>
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<span style="color: #4070a0">android:layout_height="?android:listPreferredItemHeight"</span>
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<span style="color: #4070a0">android:adjustViewBounds="true"</span>
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<span style="color: #4070a0">android:scaleType="fitCenter"</span>
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<span style="color: #4070a0">android:src="@drawable/nnf_ic_file_folder"</span>
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<span style="color: #4070a0">android:tint="?attr/colorAccent"</span>
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<span style="color: #4070a0">android:visibility="visible"</span>
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<span style="color: #4070a0">tools:ignore="ContentDescription"</span> <span style="color: #062873; font-weight: bold">/></span>
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<span style="color: #062873; font-weight: bold"><TextView</span>
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<span style="color: #4070a0">android:id="@android:id/text1"</span>
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<span style="color: #4070a0">style="?android:textAppearanceLarge"</span>
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<span style="color: #4070a0">android:layout_width="0dp"</span>
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<span style="color: #4070a0">android:layout_height="wrap_content"</span>
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<span style="color: #4070a0">android:minHeight="?android:listPreferredItemHeight"</span>
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<span style="color: #4070a0">android:layout_weight="1"</span>
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<span style="color: #4070a0">android:ellipsize="end"</span>
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<span style="color: #4070a0">android:gravity="center_vertical"</span>
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<span style="color: #4070a0">android:maxLines="4"</span>
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<span style="color: #4070a0">android:padding="8dp"</span><span style="color: #062873; font-weight: bold">/></span>
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<span style="color: #062873; font-weight: bold"><CheckBox</span>
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<span style="color: #4070a0">android:id="@+id/checkbox"</span>
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<span style="color: #4070a0">android:layout_width="wrap_content"</span>
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<span style="color: #4070a0">android:layout_height="match_parent"</span>
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<span style="color: #4070a0">android:paddingEnd="8dp"</span>
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<span style="color: #4070a0">android:paddingRight="8dp"</span>
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<span style="color: #4070a0">tools:ignore="RtlSymmetry"</span> <span style="color: #062873; font-weight: bold">/></span>
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<span style="color: #062873; font-weight: bold"></LinearLayout></span>
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</pre></div>
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<p><strong>longer_listitem_dir.xml</strong></p>
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<div class="highlight" style="background: #f0f0f0"><pre style="line-height: 125%"><span></span><span style="color: #007020"><?xml version="1.0" encoding="utf-8"?></span>
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<span style="color: #062873; font-weight: bold"><LinearLayout</span> <span style="color: #4070a0">xmlns:android="http://schemas.android.com/apk/res/android"</span>
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<span style="color: #4070a0">xmlns:tools="http://schemas.android.com/tools"</span>
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<span style="color: #4070a0">android:layout_width="match_parent"</span>
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<span style="color: #4070a0">android:layout_height="wrap_content"</span>
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<span style="color: #4070a0">android:background="?android:selectableItemBackground"</span>
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<span style="color: #4070a0">android:minHeight="?android:listPreferredItemHeight"</span>
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<span style="color: #4070a0">android:orientation="horizontal"</span>
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<span style="color: #062873; font-weight: bold">></span>
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<span style="color: #60a0b0; font-style: italic"><!--suppress AndroidDomInspection --></span>
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<span style="color: #062873; font-weight: bold"><ImageView</span>
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<span style="color: #4070a0">android:id="@+id/item_icon"</span>
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<span style="color: #4070a0">android:layout_width="?android:listPreferredItemHeight"</span>
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<span style="color: #4070a0">android:layout_height="?android:listPreferredItemHeight"</span>
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<span style="color: #4070a0">android:adjustViewBounds="true"</span>
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<span style="color: #4070a0">android:scaleType="center"</span>
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<span style="color: #4070a0">android:src="@drawable/nnf_ic_file_folder"</span>
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<span style="color: #4070a0">android:tint="?attr/colorAccent"</span>
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<span style="color: #4070a0">android:visibility="visible"</span>
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<span style="color: #4070a0">tools:ignore="ContentDescription"</span> <span style="color: #062873; font-weight: bold">/></span>
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<span style="color: #062873; font-weight: bold"><TextView</span>
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<span style="color: #4070a0">android:id="@android:id/text1"</span>
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<span style="color: #4070a0">style="?android:textAppearanceLarge"</span>
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<span style="color: #4070a0">android:layout_width="0dp"</span>
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<span style="color: #4070a0">android:layout_height="wrap_content"</span>
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<span style="color: #4070a0">android:minHeight="?android:listPreferredItemHeight"</span>
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<span style="color: #4070a0">android:layout_weight="1"</span>
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<span style="color: #4070a0">android:ellipsize="end"</span>
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<span style="color: #4070a0">android:gravity="center_vertical"</span>
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<span style="color: #4070a0">android:maxLines="4"</span>
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<span style="color: #4070a0">android:padding="8dp"</span><span style="color: #062873; font-weight: bold">/></span>
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<span style="color: #062873; font-weight: bold"></LinearLayout></span>
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</pre></div>
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<p>Note that I defined the TextViews to have a maximum of 4 lines (actual number is up to you), and a minimum height of <code>android:listPreferredItemHeight</code> (this I recommend, otherwise it looks wonky and off-center). And just be clear, the <em>ids</em> of these fields must be <code>@+id/item_icon</code>, <code>@android:id/text1</code>, and <code>@+id/checkbox</code>, or the code WILL crash on you.</p>
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<h3 id="code">Code</h3>
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<p>To use the new layouts, you need to override the <code>onCreateViewHolder</code> method in
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<a href="https://github.com/spacecowboy/NoNonsense-FilePicker/blob/master/library/src/main/java/com/nononsenseapps/filepicker/AbstractFilePickerFragment.java">AbstractFilePickerFragment</a>.</p>
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<p>Since this example will be browsing the SD-card, I will extend from the built-in FilePickerFragment.</p>
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<div class="highlight" style="background: #f0f0f0"><pre style="line-height: 125%"><span></span><span style="color: #007020; font-weight: bold">public</span> <span style="color: #007020; font-weight: bold">class</span> <span style="color: #0e84b5; font-weight: bold">CustomLayoutFilePickerFragment</span> <span style="color: #007020; font-weight: bold">extends</span> FilePickerFragment <span style="color: #666666">{</span>
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<span style="color: #60a0b0; font-style: italic">/**</span>
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<span style="color: #60a0b0; font-style: italic"> * @param parent Containing view</span>
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<span style="color: #60a0b0; font-style: italic"> * @param viewType which the ViewHolder will contain. Will be one of:</span>
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<span style="color: #60a0b0; font-style: italic"> * [VIEWTYPE_HEADER, VIEWTYPE_CHECKABLE, VIEWTYPE_DIR]. It is OK, and even expected, to use the same</span>
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|
<span style="color: #60a0b0; font-style: italic"> * layout for VIEWTYPE_HEADER and VIEWTYPE_DIR.</span>
|
|
<span style="color: #60a0b0; font-style: italic"> * @return a view holder for a file or directory (the difference is presence of checkbox).</span>
|
|
<span style="color: #60a0b0; font-style: italic"> */</span>
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|
<span style="color: #555555; font-weight: bold">@Override</span>
|
|
<span style="color: #007020; font-weight: bold">public</span> RecyclerView<span style="color: #666666">.</span><span style="color: #4070a0">ViewHolder</span> <span style="color: #06287e">onCreateViewHolder</span><span style="color: #666666">(</span>ViewGroup parent<span style="color: #666666">,</span> <span style="color: #902000">int</span> viewType<span style="color: #666666">)</span> <span style="color: #666666">{</span>
|
|
View v<span style="color: #666666">;</span>
|
|
<span style="color: #007020; font-weight: bold">switch</span> <span style="color: #666666">(</span>viewType<span style="color: #666666">)</span> <span style="color: #666666">{</span>
|
|
<span style="color: #007020; font-weight: bold">case</span> LogicHandler<span style="color: #666666">.</span><span style="color: #4070a0">VIEWTYPE_HEADER</span><span style="color: #666666">:</span>
|
|
v <span style="color: #666666">=</span> LayoutInflater<span style="color: #666666">.</span><span style="color: #4070a0">from</span><span style="color: #666666">(</span>getActivity<span style="color: #666666">()).</span><span style="color: #4070a0">inflate</span><span style="color: #666666">(</span>R<span style="color: #666666">.</span><span style="color: #4070a0">layout</span><span style="color: #666666">.</span><span style="color: #4070a0">longer_listitem_dir</span><span style="color: #666666">,</span>
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|
parent<span style="color: #666666">,</span> <span style="color: #007020; font-weight: bold">false</span><span style="color: #666666">);</span>
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|
<span style="color: #007020; font-weight: bold">return</span> <span style="color: #007020; font-weight: bold">new</span> HeaderViewHolder<span style="color: #666666">(</span>v<span style="color: #666666">);</span>
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|
<span style="color: #007020; font-weight: bold">case</span> LogicHandler<span style="color: #666666">.</span><span style="color: #4070a0">VIEWTYPE_CHECKABLE</span><span style="color: #666666">:</span>
|
|
v <span style="color: #666666">=</span> LayoutInflater<span style="color: #666666">.</span><span style="color: #4070a0">from</span><span style="color: #666666">(</span>getActivity<span style="color: #666666">()).</span><span style="color: #4070a0">inflate</span><span style="color: #666666">(</span>R<span style="color: #666666">.</span><span style="color: #4070a0">layout</span><span style="color: #666666">.</span><span style="color: #4070a0">longer_listitem_checkable</span><span style="color: #666666">,</span>
|
|
parent<span style="color: #666666">,</span> <span style="color: #007020; font-weight: bold">false</span><span style="color: #666666">);</span>
|
|
<span style="color: #007020; font-weight: bold">return</span> <span style="color: #007020; font-weight: bold">new</span> CheckableViewHolder<span style="color: #666666">(</span>v<span style="color: #666666">);</span>
|
|
<span style="color: #007020; font-weight: bold">case</span> LogicHandler<span style="color: #666666">.</span><span style="color: #4070a0">VIEWTYPE_DIR</span><span style="color: #666666">:</span>
|
|
<span style="color: #007020; font-weight: bold">default</span><span style="color: #666666">:</span>
|
|
v <span style="color: #666666">=</span> LayoutInflater<span style="color: #666666">.</span><span style="color: #4070a0">from</span><span style="color: #666666">(</span>getActivity<span style="color: #666666">()).</span><span style="color: #4070a0">inflate</span><span style="color: #666666">(</span>R<span style="color: #666666">.</span><span style="color: #4070a0">layout</span><span style="color: #666666">.</span><span style="color: #4070a0">longer_listitem_dir</span><span style="color: #666666">,</span>
|
|
parent<span style="color: #666666">,</span> <span style="color: #007020; font-weight: bold">false</span><span style="color: #666666">);</span>
|
|
<span style="color: #007020; font-weight: bold">return</span> <span style="color: #007020; font-weight: bold">new</span> DirViewHolder<span style="color: #666666">(</span>v<span style="color: #666666">);</span>
|
|
<span style="color: #666666">}</span>
|
|
<span style="color: #666666">}</span>
|
|
<span style="color: #666666">}</span>
|
|
</pre></div>
|
|
|
|
<p>And as always, to use your custom fragment you need a custom activity which loads it for you:</p>
|
|
<div class="highlight" style="background: #f0f0f0"><pre style="line-height: 125%"><span></span><span style="color: #007020; font-weight: bold">public</span> <span style="color: #007020; font-weight: bold">class</span> <span style="color: #0e84b5; font-weight: bold">CustomLayoutPickerActivity</span> <span style="color: #007020; font-weight: bold">extends</span> AbstractFilePickerActivity <span style="color: #666666">{</span>
|
|
|
|
<span style="color: #007020; font-weight: bold">public</span> <span style="color: #06287e">CustomLayoutPickerActivity</span><span style="color: #666666">()</span> <span style="color: #666666">{</span>
|
|
<span style="color: #007020; font-weight: bold">super</span><span style="color: #666666">();</span>
|
|
<span style="color: #666666">}</span>
|
|
|
|
<span style="color: #555555; font-weight: bold">@Override</span>
|
|
<span style="color: #007020; font-weight: bold">protected</span> AbstractFilePickerFragment<span style="color: #666666"><</span>File<span style="color: #666666">></span> <span style="color: #06287e">getFragment</span><span style="color: #666666">(</span>
|
|
<span style="color: #007020; font-weight: bold">final</span> String startPath<span style="color: #666666">,</span> <span style="color: #007020; font-weight: bold">final</span> <span style="color: #902000">int</span> mode<span style="color: #666666">,</span> <span style="color: #007020; font-weight: bold">final</span> <span style="color: #902000">boolean</span> allowMultiple<span style="color: #666666">,</span>
|
|
<span style="color: #007020; font-weight: bold">final</span> <span style="color: #902000">boolean</span> allowCreateDir<span style="color: #666666">)</span> <span style="color: #666666">{</span>
|
|
<span style="color: #60a0b0; font-style: italic">// Load our custom fragment here</span>
|
|
AbstractFilePickerFragment<span style="color: #666666"><</span>File<span style="color: #666666">></span> fragment <span style="color: #666666">=</span> <span style="color: #007020; font-weight: bold">new</span> CustomLayoutFilePickerFragment<span style="color: #666666">();</span>
|
|
<span style="color: #60a0b0; font-style: italic">// startPath is allowed to be null. In that case, default folder should be SD-card and not "/"</span>
|
|
fragment<span style="color: #666666">.</span><span style="color: #4070a0">setArgs</span><span style="color: #666666">(</span>startPath <span style="color: #666666">!=</span> <span style="color: #007020; font-weight: bold">null</span> <span style="color: #666666">?</span> startPath <span style="color: #666666">:</span> Environment<span style="color: #666666">.</span><span style="color: #4070a0">getExternalStorageDirectory</span><span style="color: #666666">().</span><span style="color: #4070a0">getPath</span><span style="color: #666666">(),</span>
|
|
mode<span style="color: #666666">,</span> allowMultiple<span style="color: #666666">,</span> allowCreateDir<span style="color: #666666">);</span>
|
|
<span style="color: #007020; font-weight: bold">return</span> fragment<span style="color: #666666">;</span>
|
|
<span style="color: #666666">}</span>
|
|
<span style="color: #666666">}</span>
|
|
</pre></div>
|
|
|
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<aside class="copyright" role="note">
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© 2016 Released under the Mozilla Public License 2.0 –
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Documentation built with
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Previous
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Filter based on file extension
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</div>
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</div>
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<div class="next">
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<a href="http://spacecowboy.github.io/NoNonsense-FilePicker/example/sortorder/" title="Change the sort order">
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<span class="direction">
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Next
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<div class="page">
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</div>
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<div class="wrapper">
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<div class="meta"></div>
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</main>
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<script>
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var base_url = 'http:\/\/spacecowboy.github.io\/NoNonsense-FilePicker\/';
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var repo_id = 'spacecowboy\/NoNonsense-FilePicker';
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</script>
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<script src="http://spacecowboy.github.io/NoNonsense-FilePicker/javascripts/application.js"></script>
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<script>
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/* Add headers to scrollspy */
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var headers = document.getElementsByTagName("h2");
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var scrollspy = document.getElementById('scrollspy');
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if(scrollspy) {
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if(headers.length > 0) {
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for(var i = 0; i < headers.length; i++) {
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var li = document.createElement("li");
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li.setAttribute("class", "anchor");
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var a = document.createElement("a");
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a.setAttribute("href", "#" + headers[i].id);
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a.setAttribute("title", headers[i].innerHTML);
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a.innerHTML = headers[i].innerHTML;
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li.appendChild(a)
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scrollspy.appendChild(li);
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}
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} else {
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scrollspy.parentElement.removeChild(scrollspy)
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}
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/* Add permanent link next to the headers */
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var headers = document.querySelectorAll("h1, h2, h3, h4, h5, h6");
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for(var i = 0; i < headers.length; i++) {
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var a = document.createElement("a");
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a.setAttribute("class", "headerlink");
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a.setAttribute("href", "#" + headers[i].id);
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a.setAttribute("title", "Permanent link")
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a.innerHTML = "#";
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headers[i].appendChild(a);
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}
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}
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