49 lines
2.5 KiB
Plaintext
49 lines
2.5 KiB
Plaintext
page.title=UI Framework Changes in Android 1.5
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@jd:body
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<p>Android 1.5 offers a different default look for
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the Android UI framework, in relation to Android 1.0 and 1.1. The
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screenshots below show the same activity (creating a new contact) on
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Android 1.1 and Android 1.5:</p>
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<img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 277px;" src="images/android.png" alt="" id="BLOGGER_PHOTO_ID_5323141124169754690" border="0">
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<p>You
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can see in this example that the buttons and checkboxes have a new
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appearance. Even though these changes do not affect binary nor source
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compatibility, they might still break the UI of your apps. As part of
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the UI refresh, the minimum size of some of the widgets has changed.
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For instance, Android 1.1 buttons have a minimum size of 44x48 pixels
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whereas Android 1.5 buttons now have a minimum size of 24x48 pixels.
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The image below compares the sizes of Android 1.1 buttons with Android
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1.5 buttons:</p>
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<img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 100px; height: 130px;" src="images/buttons.png" alt="" border="0">
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<p>If you rely on the button's minimum size, then the layout of your application
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may not be the same in Android 1.5 as it was in Android 1.1 because of this
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change. This would happen for instance if you created a grid of buttons using
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<code>LinearLayout</code> and relying on the minimum size yielded by
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<code>wrap_content</code> to align the buttons properly:</p>
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<img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 277px;" src="images/grid.png" alt="" id="BLOGGER_PHOTO_ID_5323147943613255250" border="0">
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<p>This layout could easily be fixed by using the
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<code>android:layout_weight</code> attribute or by replacing the
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<code>LinearLayout</code> containers with a <code>TableLayout</code>.</p>
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<p>This example is probably the worst-case UI issue you may encounter when
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running your application on Android 1.5. Other changes introduced in Android
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1.5, especially bug fixes in the layout views, may also impact your
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application—especially if it is relying on faulty/buggy behavior of the UI
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framework.</p>
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<p>If you encounter issues when running your application on Android 1.5, please
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join us on the <a href="{@docRoot}resources/community-groups.html">Android
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developer groups</a> or <a
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href="{@docRoot}resources/community-more.html">IRC</a> so that we and the
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Android community can help you fix your application.</p>
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<p>Happy coding!</p>
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