Meaning of these logcat messages

问题:

I got this error in Log but it doesn't prevent my app from processing and doesn't do any errors in app but i don't what's it

01-12 09:54:41.726 14988-15006/com.android.muslimstudios.bookstore W/EGL_emulation: eglSurfaceAttrib not implemented
01-12 09:54:41.731 14988-15006/com.android.muslimstudios.bookstore W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0xe0513980, error=EGL_SUCCESS
01-12 09:54:41.908 14988-15006/com.android.muslimstudios.bookstore D/OpenGLRenderer: endAllStagingAnimators on 0xe03c5a00 (RippleDrawable) with handle 0xe0dbe390
01-12 09:54:52.360 14988-14998/com.android.muslimstudios.bookstore W/art: Suspending all threads took: 9.121ms

回答1:

None of those are errors. W/ is a warning; D/ is a debug message.

Pretty much any Android app will trigger those specific messages from time to time. Please ignore them.

回答2:

If logcat gives you an error message, it will be E/ tag and red text