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Fix IllegalArgumentException when dismissing ReactModalHostView
Summary: This diff fixes an IllegalArgumentException when dismissing ReactModalHostView. I wasn't able to reproduce this error because this is likely created by a race condition. Reviewed By: axe-fb Differential Revision: D12916787 fbshipit-source-id: b071ffc4c251f2a613bb1270de005def56818376
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37 changes: 37 additions & 0 deletions
37
ReactAndroid/src/main/java/com/facebook/react/views/common/ContextUtils.java
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Original file line number | Diff line number | Diff line change |
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package com.facebook.react.views.common; | ||
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import android.content.Context; | ||
import android.content.ContextWrapper; | ||
import javax.annotation.Nullable; | ||
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/** | ||
* Class containing static methods involving manipulations of Contexts and their related subclasses. | ||
*/ | ||
public class ContextUtils { | ||
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/** | ||
* Returns the nearest context in the chain (as defined by ContextWrapper.getBaseContext()) which | ||
* is an instance of the specified type, or null if one could not be found | ||
* | ||
* @param context Initial context | ||
* @param clazz Class instance to look for | ||
* @param <T> | ||
* @return the first context which is an instance of the specified class, or null if none exists | ||
*/ | ||
public static @Nullable <T> T findContextOfType( | ||
@Nullable Context context, Class<? extends T> clazz) { | ||
while (!(clazz.isInstance(context))) { | ||
if (context instanceof ContextWrapper) { | ||
Context baseContext = ((ContextWrapper) context).getBaseContext(); | ||
if (context == baseContext) { | ||
return null; | ||
} else { | ||
context = baseContext; | ||
} | ||
} else { | ||
return null; | ||
} | ||
} | ||
return (T) context; | ||
} | ||
} |
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