本人初學小白，請教各位大神這是什么情況？為什么一直是黑屏？
07/19 00:05:06: Launching 'app' on Pixel XL API 28.
$ adb shell am start -n "com.example.lm.lianxi/com.example.lm.lianxi.qidongActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Waiting for process to come online...
Connected to process 6761 on device 'emulator-5556'.
Capturing and displaying logcat messages from application. This behavior can be disabled in the "Logcat output" section of the "Debugger" settings page.
W/ample.lm.lianx: Accessing hidden method Landroid/view/View;->computeFitSystemWindows(Landroid/graphics/Rect;Landroid/graphics/Rect;)Z (light greylist, reflection)
W/ample.lm.lianx: Accessing hidden method Landroid/view/ViewGroup;->makeOptionalFitsSystemWindows()V (light greylist, reflection)
D/OpenGLRenderer: HWUI GL Pipeline
D/: HostConnection::get() New Host Connection established 0x7a8286fa86a0, tid 6803
I/ConfigStore: android::hardware::configstore::V1_0::ISurfaceFlingerConfigs::hasWideColorDisplay retrieved: 0
I/ConfigStore: android::hardware::configstore::V1_0::ISurfaceFlingerConfigs::hasHDRDisplay retrieved: 0
I/OpenGLRenderer: Initialized EGL, version 1.4
D/OpenGLRenderer: Swap behavior 1
W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
D/OpenGLRenderer: Swap behavior 0
D/EGL_emulation: eglCreateContext: 0x7a827f4fae20: maj 2 min 0 rcv 2
D/EGL_emulation: eglMakeCurrent: 0x7a827f4fae20: ver 2 0 (tinfo 0x7a8286fa11c0)
I/Choreographer: Skipped 32 frames! The application may be doing too much work on its main thread.
D/EGL_emulation: eglMakeCurrent: 0x7a827f4fae20: ver 2 0 (tinfo 0x7a8286fa11c0)
I/OpenGLRenderer: Davey! duration=852ms; Flags=0, IntendedVsync=298868479830, Vsync=299401813142, OldestInputEvent=9223372036854775807, NewestInputEvent=0, HandleInputStart=299404053560, AnimationStart=299404128660, PerformTraversalsStart=299407486800, DrawStart=299577490000, SyncQueued=299579829840, SyncStart=299584015720, IssueDrawCommandsStart=299586155880, SwapBuffers=299627850280, FrameCompleted=299724670530, DequeueBufferDuration=480000, QueueBufferDuration=818000,
D/EGL_emulation: eglMakeCurrent: 0x7a827f4fae20: ver 2 0 (tinfo 0x7a8286fa11c0)
I/chatty: uid=10085(com.example.lm.lianxi) RenderThread identical 1 line
D/EGL_emulation: eglMakeCurrent: 0x7a827f4fae20: ver 2 0 (tinfo 0x7a8286fa11c0)
W/ActivityThread: handleWindowVisibility: no activity for token android.os.BinderProxy@7d0d27f
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