AppCompat does not support the current theme features:

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项目错误如下：

   Caused by: java.lang.IllegalArgumentException: AppCompat does not support the current theme features: { windowActionBar: false, windowActionBarOverlay: false, android:windowIsFloating: false, windowActionModeOverlay: false, windowNoTitle: false }
                                                                                at android.support.v7.app.AppCompatDelegateImplV7.createSubDecor(AppCompatDelegateImplV7.java:422)
                                                                                at android.support.v7.app.AppCompatDelegateImplV7.ensureSubDecor(AppCompatDelegateImplV7.java:279)
                                                                                at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:253)
                                                                                at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109)
                                                                                at com.wobiancao.keyboarddemo.MainActivity.onCreate(MainActivity.java:63)

解决：

将style.xml 中所用到主题属性修改如下

  <item name="windowActionBar">false</item>   <item name="windowNoTitle">true</item>

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