1 page.title=Action Bar Icons 2 excludeFromSuggestions=true 3 parent.title=Icon Design Guidelines 4 parent.link=icon_design.html 5 @jd:body 6 7 <div id="qv-wrapper"> 8 <div id="qv"> 9 10 <h2>In this document</h2> 11 12 <ol> 13 <li><a href="#icon11">Android 3.0 and Later</a> 14 <ol> 15 <li><a href="#size11">Size and format</a></li> 16 <li><a href="#style11">Style, colors, and effects</a></li> 17 <li><a href="#examples11">Example icons</a></li> 18 </ol> 19 </li> 20 </ol> 21 22 <h2>See also</h2> 23 24 <ol> 25 <li><a href="{@docRoot}guide/practices/screens_support.html">Supporting Multiple 26 Screens</a></li> 27 <li><a href="{@docRoot}guide/topics/ui/actionbar.html">Using the Action Bar</a></li> 28 </ol> 29 30 </div> 31 </div> 32 33 <div class="note design"> 34 <p><strong>New Guides for App Designers!</strong></p> 35 <p>Check out the new documents for designers at <strong><a 36 href="{@docRoot}design/index.html">Android Design</a></strong>, including more guidelines 37 for <a href="{@docRoot}design/style/iconography.html">Iconography</a>.</p> 38 </div> 39 40 41 <p>Action Bar icons are graphical elements placed in the <a 42 href="{@docRoot}guide/topics/ui/actionbar.html">Action Bar</a> representing individual action 43 items.</p> 44 45 <p>As described in <a 46 href="{@docRoot}guide/practices/ui_guidelines/icon_design.html#icon-sets">Providing Density-Specific 47 Icon Sets</a> and <a href="{@docRoot}guide/practices/screens_support.html">Supporting Multiple 48 Screens</a>, you should create separate icons for all generalized screen densities, including low-, 49 medium-, high-, and extra-high-density screens. This ensures that your icons will display properly 50 across the range of devices on which your application can be installed. See <a 51 href="{@docRoot}guide/practices/ui_guidelines/icon_design.html#design-tips">Tips for Designers</a> 52 for suggestions on how to work with multiple sets of icons.</p> 53 54 <p><strong>Final art must be exported as a transparent PNG file. Do not include 55 a background color</strong>.</p> 56 57 <p>Templates for creating icons in Adobe Photoshop are available in the <a 58 href="{@docRoot}guide/practices/ui_guidelines/icon_design.html#templatespack">Icon 59 Templates Pack</a>.</p> 60 61 62 63 <h2 id="icon11">Android 3.0 and Later</h2> 64 65 <p>The following guidelines describe how to design action bar icons for Android 66 3.0 (API Level 11) and later.</p> 67 68 69 <h3 id="size11">Size and format</h2> 70 71 <p>Action Bar icons should be 32-bit PNGs with an alpha channel for transparency. The finished 72 action bar icon dimensions, corresponding to a given generalized screen density, are shown in 73 the table below.</p> 74 75 <p class="table-caption" id="screens_table"><strong>Table 1.</strong> Summary of 76 finished Action Bar icon dimensions for each generalized screen density.</p> 77 78 <table> 79 <tbody> 80 <tr> 81 <th></th> 82 <th> 83 <code>ldpi</code> (120 dpi)<br> 84 <small style="font-weight: normal">(Low density screen)</small> 85 </th> 86 <th> 87 <code>mdpi</code> (160 dpi)<br> 88 <small style="font-weight: normal">(Medium density screen)</small> 89 </th> 90 <th> 91 <code>hdpi</code> (240 dpi)<br> 92 <small style="font-weight: normal">(High density screen)</small> 93 </th> 94 <th> 95 <code>xhdpi</code> (320 dpi)<br> 96 <small style="font-weight: normal">(Extra-high density screen)</small> 97 </th> 98 </tr> 99 <tr> 100 <th> 101 Action Bar Icon Size 102 </th> 103 <td> 104 18 x 18 px 105 </td> 106 <td> 107 24 x 24 px 108 </td> 109 <td> 110 36 x 36 px 111 </td> 112 <td> 113 48 x 48 px 114 </td> 115 </tr> 116 </tbody> 117 </table> 118 119 120 121 <h3 id="style11">Style, colors, and effects</h3> 122 123 <p>Action Bar icons are flat, pictured face on, and generally greyscale, depending on the 124 application's theme. Action Bar icons should not look three-dimensional.</p> 125 126 <p>In order to maintain consistency across the application's Action Bar, all Action Bar icons should 127 use the same color palette and effects.</p> 128 129 <p>When using the default "Holo Light" or "Holo Dark" themes, icons should use the color palette 130 and effects shown in Figure 1 and Figure 2, below.</p> 131 132 133 134 <table class="image-caption"> 135 <tr> 136 <td class="image-caption-i"> 137 <img src="{@docRoot}images/icon_design/action_bar_holo_light_style.png" 138 alt="A view of effects for Action Bar icons for the 'Holo Light' theme."> 139 </td> 140 <td class="image-caption-c"> 141 <div class="caption grad-rule-top"> 142 <p><strong>Figure 1. </strong>Style and effects for "Holo Light" theme Action Bar icons.</p> 143 <div class="image-caption-nested"> 144 <table> 145 <tr><td><em>1.</em></td><td nowrap>Fill color:</td><td><code>#333333</code>, 60% opacity 146 <br><br></td></tr> 147 <tr><td><em>2.</em></td><td nowrap>Inner content:</td><td>Inner content should subtract from 148 the outer shape and consist purely of transparent pixels.</td></tr> 149 </table> 150 </div> 151 </div> 152 </td> 153 </tr> 154 </table> 155 156 <table class="image-caption"> 157 <tr> 158 <td class="image-caption-i"> 159 <img src="{@docRoot}images/icon_design/action_bar_holo_dark_style.png" 160 alt="A view of effects for Action Bar icons for the 'Holo Dark' theme."> 161 </td> 162 <td class="image-caption-c"> 163 <div class="caption grad-rule-top"> 164 <p><strong>Figure 2. </strong>Style and effects for "Holo Dark" theme Action Bar icons.</p> 165 <div class="image-caption-nested"> 166 <table> 167 <tr><td><em>1.</em></td><td nowrap>Fill color:</td><td><code>#ffffff</code>, 80% opacity 168 <br><br></td></tr> 169 <tr><td><em>2.</em></td><td nowrap>Inner content:</td><td>Inner content should subtract from 170 the outer shape and consist purely of transparent pixels.</td></tr> 171 </table> 172 <p class="note"><strong>Note: </strong> icons should should have a transparent background; 173 the dark background here is for effect only.</p> 174 </div> 175 </div> 176 </td> 177 </tr> 178 </table> 179 180 181 182 183 <h3 id="examples11">Example icons</h3> 184 185 <p>Shown below are example extra-high-density Action Bar icons that are used throughout Android 186 system applications.</p> 187 188 <p class="warning"><strong>Warning:</strong> Because resources can change between platform versions, 189 you should not reference built-in icons using the Android platform resource IDs (i.e. menu or Action 190 Bar icons under <code>android.R.drawable</code>). If you want to use any icons or other internal 191 drawable resources, you should store a local copy of those icons or drawables in your application 192 resources, then reference the local copy from your application code. In that way, you can maintain 193 control over the appearance of your icons, even if the system's copy changes. Note that the grid 194 below is not intended to be complete.</p> 195 196 <img src="{@docRoot}images/icon_design/action_bar_examples.png" /> 197
