我正在嘗試將我的 android 應用程序連接到遠程服務器上的數據庫。我創建了一個登錄表單，但它顯示以下錯誤。02/11 21:14:24: Launching appNo apk changes detected since last installation, skipping installation of C:\Users\manav\AndroidStudioProjects\MySQLConnect\app\build\outputs\apk\debug\app-debug.apk$ adb shell am force-stop com.example.mysqlconnect$ adb shell am start -n "com.example.mysqlconnect/com.example.mysqlconnect.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHERConnected to process 31621 on device xiaomi-redmi_note_3-dbdeee7eCapturing and displaying logcat messages from application. This behavior can be disabled in the "Logcat output" section of the "Debugger" settings page.W/System: ClassLoader referenced unknown path: /data/app/com.example.mysqlconnect-1/lib/arm64D/AccessibilityManager: current package=com.example.mysqlconnect, accessibility manager mIsFinalEnabled=false, mOptimizeEnabled=false, mIsUiAutomationEnabled=false, mIsInterestedPackage=falseD/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: trueI/Adreno: QUALCOMM build                   : a7823f5, I59a6815413    Build Date                       : 09/23/16    OpenGL ES Shader Compiler Version: XE031.07.00.00    Local Branch                     : mybranch22028469    Remote Branch                    : quic/LA.BR.1.3.3_rb2.26    Remote Branch                    : NONE    Reconstruct Branch               : NOTHINGI/OpenGLRenderer: Initialized EGL, version 1.4E/HAL: hw_get_module_by_class: module name gralloc    hw_get_module_by_class: module name grallocI/Timeline: Timeline: Activity_launch_request time:71856102D/OpenGLRenderer: endAllStagingAnimators on 0x559d757b20 (RippleDrawable) with handle 0x559d759ed0I/DpmTcmClient: RegisterTcmMonitor from: com.android.okhttp.TcmIdleTimerMonitorD/OpenGLRenderer: endAllStagingAnimators on 0x559d874d50 (RippleDrawable) with handle 0x559d89f8a0以下是我的 Java 文件。