App crash on SettingsExampleActivity about leanback-showcase

[dakegu]

This is a known issue caused by a build tools bug within Developer Preview 3, we
should expect this being fixed in official N SDk.

On Wed, May 18, 2016, 6:12 PM Anirudh Dewani [email protected]
wrote:

5-18 18:11:22.093
12591-12591/android.support.v17.leanback.supportleanbackshowcase
E/AndroidRuntime: FATAL EXCEPTION: main
Process: android.support.v17.leanback.supportleanbackshowcase, PID: 12591
java.lang.RuntimeException: Unable to start activity
ComponentInfo{android.support.v17.leanback.supportleanbackshowcase/android.support.v17.leanback.supportleanbackshowcase.app.settings.SettingsExampleActivity}:
java.lang.IllegalStateException: Must specify preferenceTheme in theme
at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2630)
at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2691)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1444)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6010)
at java.lang.reflect.Method.invoke(Native Method)
at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:802)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:692)
Caused by: java.lang.IllegalStateException: Must specify preferenceTheme
in theme
at
android.support.v14.preference.PreferenceFragment.onCreate(PreferenceFragment.java:218)
at android.app.Fragment.performCreate(Fragment.java:2335)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:949)
at android.app.BackStackRecord.setLastIn(BackStackRecord.java:857)
at android.app.BackStackRecord.calculateFragments(BackStackRecord.java:880)
at android.app.BackStackRecord.run(BackStackRecord.java:727)
at
android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1578)
at android.app.Fragment.performStart(Fragment.java:2374)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1027)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1171)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1153)
at android.app.FragmentManagerImpl.dispatchStart(FragmentManager.java:2044)
at
android.app.FragmentController.dispatchStart(FragmentController.java:187)
at android.app.Activity.performStart(Activity.java:6681)
at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2593)
at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2691)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1444)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6010)
at java.lang.reflect.Method.invoke(Native Method)
at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:802)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:692)

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#1

[dakegu]

fixed with latest update of SDK

[olicmoon]

I didn't have problem until installing latest SDK. After installation, I'm having this issue

[dakegu]

you are right, it was fixed in previous release, then reintroduced in last release of support library

[dakegu]

verified in new release rev. 36

[SehgalDivij]

How do I solve this?
I haven't worked with Preference Activity before and I am not aware of the whole 'Preference Theme' thing.

[keyvanamiri]

Could you please clarify if you're seeing a crash or you're just wondering what preferenceTheme is used for? Support library PreferenceFragments require you to define preferenceTheme. This attribute references a style which defines the look and layout of each one of the individual preferences and fragments. If you're installing this app on TV, we have a leanback-styled theme of @style/PreferenceThemeOverlay.v14.Leanback. If you take a look at "Theme.Example.LeanbackPreferences" you can see how it's defined there.