android studio http json,android studio访问json出错

@寻求帮助的编程小白:

D/OpenGLRenderer: Swap behavior 0 W/IInputConnectionWrapper: finishComposingText on inactive InputConnection W/IInputConnectionWrapper: finishComposingText on inactive InputConnection W/IInputConnectionWrapper: finishComposingText on inactive InputConnection W/IInputConnectionWrapper: finishComposingText on inactive InputConnection D/NetworkSecurityConfig: No Network Security Config specified, using platform default D/StrictMode: StrictMode policy violation; ~duration=67 ms: android.os.StrictMode$StrictModeNetworkViolation: policy=65543 violation=4 at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1309) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:333) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:196)