My Android Advanced tour------> Fix error: You need to use a theme.appcompat Theme (or descendant) with this activity.

#1, error description

Today, to achieve activity does not show the title bar effect, in the project's Androidmanifest.xml file, the corresponding activity to add properties

 android:theme="@android:style/Theme.NoTitleBar"

The specific code is as follows:

<activity android:name=". Module.view.activity.KuwoMusicPlayActivity"  Android:theme="@android: Style/theme.notitlebar">                        <intent-filter>                <action android:name="Android.intent.action.MAIN" />                <category android:name="Android.intent.category.LAUNCHER" />            </intent-filter></activity>

As a result, when you run the app, the following error is reported:

touse a Theme.AppCompat theme (orwith this activity.

The specific error log is as follows:

 on- on  on: -:41.950 6637-6637/com. XTC. KuwoE/androidruntime:fatal Exception:main Process:com. XTC. KuwoPid:6637Java. Lang. RuntimeException: Unable to start activity componentinfo{com. XTC. Kuwo/com. XTC. Kuwo. Module. View. Activity. Kuwomusicplayactivity}: Java. Lang. IllegalStateException: Need to use a Theme. AppCompatTheme (ordescendant) with this activity. At Android. App. Activitythread. Performlaunchactivity(Activitythread. Java:2325) at Android. App. Activitythread. Handlelaunchactivity(Activitythread. Java:2387) at Android. App. Activitythread. Access$800 (Activitythread. Java:151) at Android. App. Activitythread$H. Handlemessage(Activitythread. Java:1303) at Android. OS. Handler. DispatchMessage(Handler. Java:102) at Android. OS. Looper. Loop(Looper. Java:135) at Android. App. Activitythread. Main(Activitythread. Java:5254) at Java. Lang. Reflect. Method. Invoke(Native Method) at Java. Lang. Reflect. Method. Invoke(Method. Java:372) atcom. Android. Internal. OS. Zygoteinit$MethodAndArgsCaller. Run(Zygoteinit. Java:955) atcom. Android. Internal. OS. Zygoteinit. Main(Zygoteinit. Java: -) caused By:java. Lang. IllegalStateException: Need to use a Theme. AppCompatTheme (ordescendant) with this activity. At Android. Support. V7. App. APPCOMPATDELEGATEIMPLV7. Createsubdecor(AppCompatDelegateImplV7. Java:340) at Android. Support. V7. App. APPCOMPATDELEGATEIMPLV7. Ensuresubdecor(AppCompatDelegateImplV7. Java:309) at Android. Support. V7. App. APPCOMPATDELEGATEIMPLV7. Setcontentview(AppCompatDelegateImplV7. Java:273) at Android. Support. V7. App. Appcompatactivity. Setcontentview(appcompatactivity. Java:136) atcom. XTC. Kuwo. Module. View. Activity. Kuwomusicplayactivity. OnCreate(kuwomusicplayactivity. Java: $) at Android. App. Activity. Performcreate(Activity. Java:5990) at Android. App. Instrumentation. Callactivityoncreate(instrumentation. Java:1106) at Android. App. Activitythread. Performlaunchactivity(Activitythread. Java:2278) at Android. App. Activitythread. Handlelaunchactivity(Activitythread. Java:2387)? At Android. App. Activitythread. Access$800 (Activitythread. Java:151)? At Android. App. Activitythread$H. Handlemessage(Activitythread. Java:1303)? At Android. OS. Handler. DispatchMessage(Handler. Java:102)? At Android. OS. Looper. Loop(Looper. Java:135)? At Android. App. Activitythread. Main(Activitythread. Java:5254)? At Java. Lang. Reflect. Method. Invoke(Native Method)? At Java. Lang. Reflect. Method. Invoke(Method. Java:372)? Atcom. Android. Internal. OS. Zygoteinit$MethodAndArgsCaller. Run(Zygoteinit. Java:955)? Atcom. Android. Internal. OS. Zygoteinit. Main(Zygoteinit. Java: -)?

As shown in the following:

2. Error analysis

It turns out that my Activity inherits from Android.support.v7.app.AppCompatActivity, not android.app.Activity.

3, Solution Method 1:

When the activity is created, if it is not so strongly required to inherit from Appcompatactivity, the activity is directly inherited.
If you inherit activity from Appcompatactivity:

publicclass MainActivity extends ActionBarActivity 

Change to activity to inherit from activity:

publicclass MainActivity extends Activity

Method 2:

Or want to inherit from Appcompatactivity, then follow the prompts to use the AppCompat theme, the Androidmanifest.xml file about the activity of the theme configuration changed to:

android:theme="@style/Theme.AppCompat.Light.NoActionBar"

The complete code is as follows:

<activity android:name=". Module.view.activity.KuwoMusicPlayActivity"  Android:theme="@style/theme.appcompat.light.noactionbar">                        <intent-filter>                <action android:name="Android.intent.action.MAIN" />                <category android:name="Android.intent.category.LAUNCHER" />            </intent-filter></activity>

Problem Solving!

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My Android Advanced tour------> Fix error: You need to use a theme.appcompat Theme (or descendant) with this activity.