java.lang.IllegalStateException: AppCompat has already installed itself into the Window

GitHub | iampawan | 4 months ago
  1. 0

    GitHub comment 108#240763850

    GitHub | 4 months ago | iampawan
    java.lang.IllegalStateException: AppCompat has already installed itself into the Window
  2. 0

    Activity ActionBar can't showing the launcher icon and drawer layout icon

    Stack Overflow | 2 years ago | hasnain_ahmad
    java.lang.RuntimeException: Unable to start activity ComponentInfo{xperts.net.pk.navwithbaseactivity/xperts.net.pk.navwithbaseactivity.FirstActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
  3. 0

    Android Fullscreen Theme is not working

    Stack Overflow | 2 years ago
    java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
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  5. 0

    Action Bar Background Not Changing

    Stack Overflow | 2 years ago
    java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity. at android.support.v7.app.AppCompatDelegateImplBase.onCreate(AppCompatDelegateImplBase.java:122)
  6. 0

    First program doesn't work and i have no idea why

    Stack Overflow | 1 year ago | Vivian
    java.lang.RuntimeException: Unable to start activity ComponentInfo{de.vivian.calci/de.vivian.calci.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.

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Root Cause Analysis

  1. java.lang.IllegalStateException

    AppCompat has already installed itself into the Window

    at android.support.v7.app.AppCompatDelegateImplBase.<init>()
  2. Android v7
    AppCompatActivity.onCreate
    1. android.support.v7.app.AppCompatDelegateImplBase.<init>(AppCompatDelegateImplBase.java:74)
    2. android.support.v7.app.AppCompatDelegateImplV7.<init>(AppCompatDelegateImplV7.java:146)
    3. android.support.v7.app.AppCompatDelegateImplV11.<init>(AppCompatDelegateImplV11.java:28)
    4. android.support.v7.app.AppCompatDelegateImplV14.<init>(AppCompatDelegateImplV14.java:41)
    5. android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:193)
    6. android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:173)
    7. android.support.v7.app.AppCompatActivity.getDelegate(AppCompatActivity.java:511)
    8. android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:71)
    8 frames
  3. com.trello.rxlifecycle
    RxAppCompatActivity.onCreate
    1. com.trello.rxlifecycle.components.support.RxAppCompatActivity.onCreate(RxAppCompatActivity.java:43)
    1 frame