Android：即時應用僅顯示白屏

Question

我試圖制作一個基本的Hello world Instant App。 為此，我遵循https://developer.android.com/topic/instant-apps/getting-started/first-instant-app.html

我已經按照文檔設置了所有內容，但無法使我的應用正常運行。 我得到的只是一個白屏

SDK已更新

輸出量

即使我也沒有從logcat輸出中得到任何有意義的東西

06-29 11:37:14.376 5419-5431/? I/DevAtomProvider: Dev Manager providing jar from /data/user/0/com.google.android.instantapps.devman/cache/iapk_atoms/com.example.myfourthinstantapplication/atom-download--feature-1498716430329/feature.jar
06-29 11:37:14.111 5529-5529/? W/isor.isolated15: type=1400 audit(0.0:26): avc: denied { getattr } for path="/data/data/com.google.android.instantapps.supervisor" dev="dm-0" ino=7647 scontext=u:r:isolated_app:s0:c512,c768 tcontext=u:object_r:app_data_file:s0:c512,c768 tclass=dir permissive=0
06-29 11:37:14.660 5475-5559/? E/libEGL: validate_display:99 error 3008 (EGL_BAD_DISPLAY)
06-29 11:37:14.666 5475-5559/? I/aiagpu: [0629/113714:INFO:gpu_host.cc(46)] [channel = GPU_CHANNEL_1] init


                                         [ 06-29 11:37:14.671  5475: 5559 D/         ]
                                         HostConnection::get() New Host Connection established 0x91f551c0, tid 5559


                                         [ 06-29 11:37:14.675  5475: 5559 W/         ]
                                         Unrecognized GLES max version string in extensions: ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_dma_v1 
06-29 11:37:14.683 5475-5559/? D/EGL_emulation: eglCreateContext: 0xa2b91dc0: maj 1 min 0 rcv 1
06-29 11:37:14.690 5475-5559/? W/System: ClassLoader referenced unknown path: 
06-29 11:37:14.715 5475-5475/? D/NetworkSecurityConfig: No Network Security Config specified, using platform default
06-29 11:37:14.768 5475-5564/? I/Isotope: UID: [10086]  PID: [5475] HygieneTaskService : Starting task: HygieneTaskService.schedule
06-29 11:37:14.794 5475-5564/? W/InstanceID/Rpc: Found 10013
06-29 11:37:14.939 5529-5540/? V/native: jni_stub.cpp:24 Read:32 from instant_app_interface_fd
06-29 11:37:14.939 5529-5540/? V/native: jni_stub.cpp:42 Read function ptr : 1
06-29 11:37:14.939 5529-5540/? D/native: jni_stub.cpp:63 Registering com/google/android/instantapps/supervisor/gpu/GpuClientCreatorNativeImpl 0xa5735904 2
06-29 11:37:14.939 5529-5540/? D/native: jni_stub.cpp:63 Registering com/google/android/instantapps/supervisor/gpu/WindowContainerNativeImpl 0xa573591c 2
06-29 11:37:14.939 5529-5540/? D/native: jni_stub.cpp:63 Registering com/google/android/instantapps/supervisor/gpu/WindowBufferContainerNativeImpl 0xa5735934 2
06-29 11:37:14.940 5529-5540/? D/native: jni_stub.cpp:63 Registering com/google/android/instantapps/supervisor/syscall/SyscallServiceClient 0xa5735a00 6
06-29 11:37:14.940 5529-5540/? D/native: jni_stub.cpp:63 Registering com/google/android/instantapps/supervisor/syscall/IPCNative 0xa5737a34 1
06-29 11:37:14.940 5529-5540/? D/native: jni_stub.cpp:63 Registering com/google/android/instantapps/supervisor/syscall/SyscallService 0xa57359a0 6
06-29 11:37:14.940 5529-5540/? D/native: jni_stub.cpp:63 Registering com/google/android/instantapps/supervisor/syscall/NativeLogSettings 0xa5735a60 6
06-29 11:37:14.940 5529-5540/? D/native: jni_stub.cpp:63 Registering com/google/android/instantapps/supervisor/gpu/GpuHostCreatorNativeImpl 0xa57358e0 3
06-29 11:37:14.940 5529-5540/? D/native: jni_stub.cpp:63 Registering com/google/android/instantapps/supervisor/syscall/LibraryLoader 0xa57359e8 1
06-29 11:37:15.345 5475-5559/? W/Isotope: UID: [10086]  PID: [5475] ServiceMgrForwarder : Service not found: dropbox
06-29 11:37:15.347 5475-5559/? W/Isotope: UID: [10086]  PID: [5475] ServiceMgrForwarder : Service not found: graphicsstats
06-29 11:37:15.363 5475-5559/? W/Isotope: UID: [10086]  PID: [5475] ServiceMgrForwarder : Service not found: overlay
06-29 11:37:15.553 5529-5567/? D/SyscallServiceClient: Syscall client initialized
06-29 11:37:15.562 5529-5540/? I/aiagpu: [0629/113715:INFO:gpu_client.cc(55)] GpuClient::Initialize
06-29 11:37:15.606 5475-5555/? I/IsotopeNative: storage_manager.cpp:171 [StorageManager]: calling uid 99002 with package name com.example.myfourthinstantapplication cannot access /data/user wrt root directory /data/data/com.google.android.instantapps.supervisor/files
06-29 11:37:15.606 5475-5555/? I/IsotopeNative: storage_manager.cpp:171 [StorageManager]: calling uid 99002 with package name com.example.myfourthinstantapplication cannot access /data/user wrt root directory /data/data/com.google.android.instantapps.supervisor/files
06-29 11:37:15.606 5475-5555/? I/IsotopeNative: storage_manager.cpp:171 [StorageManager]: calling uid 99002 with package name com.example.myfourthinstantapplication cannot access /data/user wrt root directory /data/data/com.google.android.instantapps.supervisor/files
06-29 11:37:15.607 5475-5555/? I/IsotopeNative: storage_manager.cpp:171 [StorageManager]: calling uid 99002 with package name com.example.myfourthinstantapplication cannot access /data/user wrt root directory /data/data/com.google.android.instantapps.supervisor/files
06-29 11:37:15.607 5475-5555/? I/IsotopeNative: storage_manager.cpp:171 [StorageManager]: calling uid 99002 with package name com.example.myfourthinstantapplication cannot access /data/user wrt root directory /data/data/com.google.android.instantapps.supervisor/files
06-29 11:37:15.607 5475-5555/? I/IsotopeNative: storage_manager.cpp:171 [StorageManager]: calling uid 99002 with package name com.example.myfourthinstantapplication cannot access /data/user wrt root directory /data/data/com.google.android.instantapps.supervisor/files
06-29 11:37:15.607 5475-5555/? I/IsotopeNative: storage_manager.cpp:171 [StorageManager]: calling uid 99002 with package name com.example.myfourthinstantapplication cannot access /data/user wrt root directory /data/data/com.google.android.instantapps.supervisor/files
06-29 11:37:18.003 1931-3113/? W/io.grpc.internal.ci: [{0}] Failed to resolve name. status={1}
06-29 11:37:18.051 1550-1584/? I/InputReader: Reconfiguring input devices.  changes=0x00000010
06-29 11:37:18.060 1717-1717/? D/CarrierSvcBindHelper: No carrier app for: 0
06-29 11:37:22.085 2559-2625/? I/Finsky: [150] com.google.android.finsky.g.d.a(24): Completed 0 account content syncs with 0 successful.
06-29 11:37:22.087 2559-2559/? I/Finsky: [1] com.google.android.finsky.services.e.a(5): Installation state replication succeeded.
06-29 11:37:33.022 1313-1335/? W/audio_hw_generic: Not supplying enough data to HAL, expected position 3574921 , only wrote 3574080
06-29 11:37:33.109 1550-1563/? I/ProcessStatsService: Prepared write state in 9ms
06-29 11:37:33.233 5529-5529/? W/art: Attempt to set the sensitive thread twice. Tid:5529
06-29 11:37:33.383 5475-5485/? I/art: Background partial concurrent mark sweep GC freed 19558(1255KB) AllocSpace objects, 8(252KB) LOS objects, 35% free, 7MB/11MB, paused 4.514ms total 155.311ms
06-29 11:37:33.409 1550-1855/? I/ActivityManager: START u0 {dat=https://myfourthinstantapplication.example.com/... flg=0x10000000 cmp=com.google.android.instantapps.supervisor/.shadow.ShadowActivity10 (has extras)} from uid 10086 on display 0
06-29 11:37:33.489 1269-1305/? D/gralloc_ranchu: gralloc_alloc: Creating ashmem region of size 2691072
06-29 11:37:33.509 1550-1559/? I/art: Background partial concurrent mark sweep GC freed 11387(828KB) AllocSpace objects, 4(208KB) LOS objects, 23% free, 12MB/16MB, paused 2.852ms total 113.459ms
06-29 11:37:33.520 1269-1269/? E/EGL_emulation: tid 1269: eglCreateSyncKHR(1901): error 0x3004 (EGL_BAD_ATTRIBUTE)
06-29 11:37:33.597 1985-2151/? D/EGL_emulation: eglMakeCurrent: 0xb0305480: ver 2 0 (tinfo 0xb03036c0)
06-29 11:37:33.708 1550-1559/? I/art: Background partial concurrent mark sweep GC freed 1008(54KB) AllocSpace objects, 0(0B) LOS objects, 23% free, 13MB/17MB, paused 3.307ms total 152.453ms
06-29 11:37:33.943 1630-1648/? I/art: Background partial concurrent mark sweep GC freed 14682(952KB) AllocSpace objects, 2(132KB) LOS objects, 25% free, 11MB/15MB, paused 2.209ms total 115.433ms
06-29 11:37:33.945 5529-5529/? W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
06-29 11:37:34.586 1269-1274/? E/SurfaceFlinger: ro.sf.lcd_density must be defined as a build property
06-29 11:37:34.587 5475-5487/? W/Isotope: UID: [10086]  PID: [5475] ServiceMgrForwarder : Service not found: graphicsstats

                                          [ 06-29 11:37:34.591  5475: 5486 D/         ]
                                          HostConnection::get() New Host Connection established 0x91f18840, tid 5486


                                          [ 06-29 11:37:34.593  5475: 5486 W/         ]
                                          Unrecognized GLES max version string in extensions: ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_dma_v1 

                                          [ 06-29 11:37:34.623  5529: 5529 D/         ]
                                          HostConnection::get() New Host Connection established 0xa3eb2bc0, tid 5529


                                          [ 06-29 11:37:34.624  5529: 5529 W/         ]
                                          Unrecognized GLES max version string in extensions: ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_dma_v1 
06-29 11:37:34.736 5529-5579/? D/libEGL: Emulator has host GPU support, qemu.gles is set to 1.
06-29 11:37:34.737 5475-5486/? I/IsotopeNative: storage_manager.cpp:171 [StorageManager]: calling uid 99002 with package name com.example.myfourthinstantapplication cannot access /dev/socket/property_service wrt root directory /data/data/com.google.android.instantapps.supervisor/files
06-29 11:37:34.737 5475-5486/? W/IsotopeNative: syscall_server.cpp:737 [SyscallServer]: SyscallServer: accessing path /dev/socket/property_service in 8 which is not allowed! 
06-29 11:37:34.762 5529-5579/? D/libEGL: loaded /system/lib/egl/libGLES_emulation.so
06-29 11:37:34.926 5529-5529/? W/art: Before Android 4.1, method int android.support.v7.widget.ListViewCompat.lookForSelectablePosition(int, boolean) would have incorrectly overridden the package-private method in android.widget.ListView
06-29 11:37:34.977 5529-5579/? I/OpenGLRenderer: Initialized EGL, version 1.4
06-29 11:37:34.977 5529-5579/? D/OpenGLRenderer: Swap behavior 1
06-29 11:37:34.977 5529-5579/? W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
06-29 11:37:34.977 5529-5579/? D/OpenGLRenderer: Swap behavior 0

                                                 [ 06-29 11:37:34.979  5475: 5570 D/         ]
                                                 HostConnection::get() New Host Connection established 0x91f25000, tid 5570


                                                 [ 06-29 11:37:34.983  5475: 5570 W/         ]
                                                 Unrecognized GLES max version string in extensions: ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_dma_v1 

                                                 [ 06-29 11:37:35.025  5475: 5580 D/         ]
                                                 HostConnection::get() New Host Connection established 0x91f259c0, tid 5580


                                                 [ 06-29 11:37:35.028  5475: 5580 W/         ]
                                                 Unrecognized GLES max version string in extensions: ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_dma_v1 
06-29 11:37:35.068 5475-5580/? D/EGL_emulation: eglCreateContext: 0xa2bcb900: maj 2 min 0 rcv 2
06-29 11:37:35.072 5475-5580/? D/EGL_emulation: eglMakeCurrent: 0xa2bcb900: ver 2 0 (tinfo 0x905ff620)
06-29 11:37:35.214 5475-5580/? D/EGL_emulation: eglMakeCurrent: 0xa2bcb900: ver 2 0 (tinfo 0x905ff620)
06-29 11:37:35.446 5475-5512/? D/EGL_emulation: eglMakeCurrent: 0xb0305660: ver 2 0 (tinfo 0xb0303700)
06-29 11:37:35.451 1550-1570/? I/ActivityManager: Displayed com.google.android.instantapps.supervisor/.shadow.ShadowActivity10: +2s4ms
06-29 11:37:35.860 1550-1570/? I/WindowManager: Destroying surface Surface(name=com.android.launcher3/com.android.launcher3.Launcher) called by com.android.server.wm.WindowStateAnimator.destroySurface:2014 com.android.server.wm.WindowStateAnimator.destroySurfaceLocked:881 com.android.server.wm.WindowState.destroyOrSaveSurface:2073 com.android.server.wm.AppWindowToken.destroySurfaces:363 com.android.server.wm.WindowStateAnimator.finishExit:565 com.android.server.wm.AppWindowAnimator.stepAnimationLocked:427 com.android.server.wm.WindowAnimator.updateAppWindowsLocked:176 com.android.server.wm.WindowAnimator.animateLocked:678 
06-29 11:37:35.889 5475-5475/? D/Supervisor: UrlHandler stopping
06-29 11:37:35.907 1550-1855/? I/ActivityManager: Activity reported stop, but no longer stopping: ActivityRecord{25fc4e u0 com.google.android.instantapps.supervisor/.UrlHandler t29 f}
06-29 11:37:36.262 1313-1336/? W/audio_hw_generic: Not supplying enough data to HAL, expected position 3883444 , only wrote 3729600
06-29 11:37:41.168 1550-2912/? D/ConnectivityService: reportNetworkConnectivity(100, false) by 10013
06-29 11:37:41.193 1550-2016/? I/ActivityManager: Start proc 5588:com.google.android.talk/u0a55 for broadcast com.google.android.talk/com.google.android.apps.hangouts.service.GcmStateReceiver
06-29 11:37:41.198 5588-5588/? W/art: Unexpected CPU variant for X86 using defaults: x86
06-29 11:37:41.201 1550-1571/? W/ProcessCpuTracker: Skipping unknown process pid 5587
06-29 11:37:41.247 5588-5588/? W/System: ClassLoader referenced unknown path: /system/app/Hangouts/lib/x86
06-29 11:37:41.477 5588-5588/? I/Babel_telephony: TeleModule.onApplicationCreate
06-29 11:37:41.494 5588-5611/? I/Babel_SMS: MmsConfig: mnc/mcc: 310/260
06-29 11:37:41.494 5588-5611/? I/Babel_SMS: MmsConfig.loadMmsSettings
06-29 11:37:41.498 5588-5611/? I/Babel_SMS: MmsConfig.loadDeviceMmsSettings from API: mUserAgent=GoldfishNexus, mUaProfUrl=http://gsm.lge.com/html/gsm/Nexus5-M3.xml
06-29 11:37:41.499 5588-5611/? I/Babel_SMS: MmsConfig.loadFromDatabase
06-29 11:37:41.513 5588-5611/? E/SQLiteLog: (1) no such table: mmsconfig
06-29 11:37:41.520 5588-5611/? I/Babel_SMS: MmsConfig: no mmsconfig table android.database.sqlite.SQLiteException: no such table: mmsconfig (code 1): , while compiling: SELECT key, value, type FROM mmsconfig WHERE numeric=?
06-29 11:37:41.520 5588-5611/? I/Babel_SMS: MmsConfig.loadFromResources
06-29 11:37:41.521 5588-5611/? E/Babel_SMS: canonicalizeMccMnc: invalid mccmnc nullnull
06-29 11:37:41.522 5588-5611/? W/Babel_SMS: MmsConfig: invalid key=userAgent or type=string
06-29 11:37:41.522 5588-5611/? W/Babel_SMS: MmsConfig: invalid key=uaProfUrl or type=string
06-29 11:37:41.522 5588-5611/? I/Babel_SMS: MmsConfig.loadMmsSettings: mUserAgent=GoldfishNexus, mUaProfUrl=http://gsm.lge.com/html/gsm/Nexus5-M3.xml
06-29 11:37:41.531 5588-5588/? I/Babel_Prime: wrapCrashReportingIntoUncaughtExceptionHandler
06-29 11:37:41.531 5588-5588/? I/Babel_Prime: isMemoryEnabled=false
06-29 11:37:41.532 5588-5588/? I/Babel_Prime: isTimerEnabled=false
06-29 11:37:41.532 5588-5588/? I/Babel_Prime: isCrashCounterEnabled=true
06-29 11:37:41.552 5588-5588/? I/Babel_Crash: Startup - clean
06-29 11:37:41.591 1550-1598/? D/ConnectivityService: NetworkAgentInfo [MOBILE (LTE) - 100] validation passed
06-29 11:37:41.610 5588-5588/? I/Babel_Prime: startMemoryMonitor
06-29 11:37:41.631 5588-5588/? D/Babel: onCreate: Shutdown runnable posted in onCreate with a delay of 5000 ms.
06-29 11:37:41.783 5588-5588/? V/NativeCrypto: Registering com/google/android/gms/org/conscrypt/NativeCrypto's 259 native methods...
06-29 11:37:41.843 5588-5588/? D/NetworkSecurityConfig: No Network Security Config specified, using platform default
06-29 11:37:41.850 5588-5588/? I/ProviderInstaller: Installed default security provider GmsCore_OpenSSL
06-29 11:37:41.874 5588-5588/? D/Babel: Idle: Shutdown runnable posted in release with a delay of 5000 ms.
06-29 11:37:46.921 5588-5588/? D/Babel: RefCountedService(com.google.android.apps.hangouts.requestwriter.RequestWriter) onDestroy (count=0, startId=1 stopped=true)
06-29 11:37:46.924 1550-3351/? I/ActivityManager: Killing 4980:com.google.android.talk:matchstick/u0a55 (adj 906): empty #17
06-29 11:37:46.952 1550-2016/? D/ActivityManager: cleanUpApplicationRecord -- 4980
06-29 11:37:47.537 1550-1559/? I/art: Background sticky concurrent mark sweep GC freed 38683(3MB) AllocSpace objects, 6(264KB) LOS objects, 22% free, 13MB/17MB, paused 2.228ms total 225.708ms
06-29 11:37:56.504 5588-5606/? W/Babel: bcq TOOK TOO LONG! (15041ms > 10000ms)
06-29 11:37:56.504 5588-5607/? W/Babel: bcq TOOK TOO LONG! (15026ms > 10000ms)
06-29 11:37:56.525 5627-5627/? W/art: Unexpected CPU variant for X86 using defaults: x86
06-29 11:37:56.526 1550-1563/? I/ActivityManager: Start proc 5627:com.google.android.talk:matchstick/u0a55 for broadcast com.google.android.talk/com.google.android.libraries.matchstick.net.MatchstickInProcessReceiver
06-29 11:37:56.534 1550-1561/? I/Telecom: PhoneAccountRegistrar: SimCallManager queried, returning: null: TSI.gSCM@AHM
06-29 11:37:56.540 5588-5588/? I/Babel_telephony: TeleModule.updateConnectionManagerRegistration, registration preference changed from false to false
06-29 11:37:56.540 5588-5588/? W/Babel: BAM#gBA: invalid account id: -1
06-29 11:37:56.540 5588-5588/? W/Babel: BAM#gBA: invalid account id: -1
06-29 11:37:56.540 5588-5588/? I/Babel_telephony: TeleModule.updateIncomingCallRegistration, preferred account for incoming calls changed from: null to null
06-29 11:37:56.548 1550-2015/? I/Telecom: PhoneAccountRegistrar: SimCallManager queried, returning: null: TSI.gSCM@AHU
06-29 11:37:56.573 5627-5627/? W/System: ClassLoader referenced unknown path: /system/app/Hangouts/lib/x86
06-29 11:37:56.798 5627-5642/? I/MS_RegisterService: RegisterService intent:Intent { act=register_intent_action flg=0x10 cmp=com.google.android.talk/com.google.android.libraries.matchstick.net.SilentRegisterService } isPeriodic:false
06-29 11:37:56.844 5627-5642/? V/NativeCrypto: Registering com/google/android/gms/org/conscrypt/NativeCrypto's 259 native methods...
06-29 11:37:56.872 5627-5642/? D/NetworkSecurityConfig: No Network Security Config specified, using platform default
06-29 11:37:56.876 5627-5642/? I/ProviderInstaller: Installed default security provider GmsCore_OpenSSL
06-29 11:37:56.877 5627-5642/? I/MS_RegisterService: Not registered and not enabled. Doing nothing.

Answer 1

白色屏幕可見，這意味着您的即時應用程序在模擬器中運行良好。 首先發布您的完整代碼，以便我可以提出更好的建議。 同時，您需要檢查以下幾點：1.檢查Java活動文件的XML文件是否在屏幕上顯示一些文本。 2.如果您的應用程序已安裝在模擬器中，請先將其卸載，然后選擇要在模擬器上運行的即時應用程序。

Answer 2

將此模擬器的圖形仿真性能從自動更改為Hardware GLES 2.0或Software GLES 2.0，如本博文所示： http ://dominoc925.blogspot.fr/2017/08/android-studio-emulator-how-i-resolved.html

Answer 3

解決了白屏。 可能的相遇是

1）如果出現以下消息

在終端窗口I / mple.myfirstap中：后台並發復制GC已釋放8149（516KB）AllocSpace對象，0（0B）LOS對象，50％空閑，1828KB / 3MB，已暫停5.100ms，總計179.836ms D / EGL_emulation：eglMakeCurrent：0xe0724840：版本2 0（tinfo 0xe27cddc0）應用程序終止。

轉到layout / activity_display_message.xml->選擇textView組件->然后在“屬性”窗口中刪除硬編碼的字符串“ textValue”，（不應使用@string資源）清除硬編碼的textValue並將其保留為文本框為空

2）（可選）您可以嘗試從仿真器中卸載應用程序，然后重新構建。

Answer 4

創建一個新項目，然后再次查看沒有任何顯示。 您的SDK沒有問題。 如果SDK失敗，則您的Android Studio無法啟動，並提示您下載SDK或提供SDK路徑。