java.lang.RuntimeException: Unable to start activity ComponentInfo{*}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.

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Unable to start activity ComponentInfo{com.example.joanna.fragmentn/com.example.joanna.fragmentn.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
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Unable to start activity ComponentInfo{com.example.jileniao/com.example.jileniao.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
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Unable to start activity ComponentInfo{net.androidbootcamp.concerttickets/net.androidbootcamp.concerttickets.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
java.lang.RuntimeException: Unable to start activity ComponentInfo{*}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
at android.support.v7.app.t.a(AppCompatDelegateImplBase.java:124)
at android.support.v7.app.AppCompatDelegateImplV7.a(AppCompatDelegateImplV7.java:146)
at android.support.v7.app.q.onCreate(AppCompatActivity.java:59)

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