PhoneStateListener 引发的内存泄露

因为开了StrictMode，今天看log发现相似这种错误：html E/StrictMode: android.os.StrictMode$InstanceCountViolation: class com.XXX.XXX.XXX.XXX.LiveVideoActivity; instances=2; limit=1 E/StrictMode: android.os.StrictMode$Ins

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