C# Xamarin.Forms应用程序在设备上的MigrateAsync上崩溃，但在模拟器上不崩溃
我只是想将一个C# Xamarin.Forms应用程序在设备上的MigrateAsync上崩溃，但在模拟器上不崩溃,c#,android,sqlite,xamarin.forms,C#,Android,Sqlite,Xamarin.forms,我只是想将一个IPoint结构保存到移动设备上的SQLite数据库中。 因此，我在主项目中添加了几个nuget包： Microsoft.EntityFrameworkCore.Sqlite.NetTopologySuite 网络拓扑套件 添加这些软件包和代码后，应用程序开始在Android上崩溃。 编辑：我还尝试了该项目的旧版本，但在我的设备上无法运行。但它们都在模拟器上工作。 通过查看VS输出获得的崩溃信息： Loading reference 1 of /storage/emulated
IPoint- Microsoft.EntityFrameworkCore.Sqlite.NetTopologySuite
- 网络拓扑套件
编辑：我还尝试了该项目的旧版本，但在我的设备上无法运行。但它们都在模拟器上工作。 通过查看VS输出获得的崩溃信息：
Loading reference 1 of /storage/emulated/0/Android/data/com.companyname.MyApp/files/.__override__/SQLitePCLRaw.provider.e_sqlite3.dll asmctx DEFAULT, looking for SQLitePCLRaw.core, Version=1.1.12.351, Culture=neutral, PublicKeyToken=1488e028ca7ab535
Assembly Ref addref SQLitePCLRaw.provider.e_sqlite3[0x7c6e295880] -> SQLitePCLRaw.core[0x7c6e295600]: 3
Loading reference 2 of /storage/emulated/0/Android/data/com.companyname.MyApp/files/.__override__/SQLitePCLRaw.batteries_v2.dll asmctx DEFAULT, looking for SQLitePCLRaw.core, Version=1.1.12.351, Culture=neutral, PublicKeyToken=1488e028ca7ab535
Assembly Ref addref SQLitePCLRaw.batteries_v2[0x7c6e295380] -> SQLitePCLRaw.core[0x7c6e295600]: 4
DllImport attempting to load: 'e_sqlite3'.
DllImport error loading library '/storage/emulated/0/Android/data/com.companyname.MyApp/files/.__override__/libe_sqlite3': 'dlopen failed: library "/storage/emulated/0/Android/data/com.companyname.MyApp/files/.__override__/libe_sqlite3" not found'.
DllImport error loading library '/storage/emulated/0/Android/data/com.companyname.MyApp/files/.__override__/libe_sqlite3.so': 'dlopen failed: library "/storage/emulated/0/Android/data/com.companyname.MyApp/files/.__override__/libe_sqlite3.so" not found'.
DllImport error loading library '/system/lib/libe_sqlite3': 'dlopen failed: library "/system/lib/libe_sqlite3" not found'.
DllImport error loading library '/system/lib/libe_sqlite3.so': 'dlopen failed: library "/system/lib/libe_sqlite3.so" not found'.
DllImport error loading library 'libe_sqlite3': 'dlopen failed: library "libe_sqlite3" not found'.
DllImport loaded library 'libe_sqlite3.so'.
DllImport searching in: 'e_sqlite3' ('libe_sqlite3.so').
Searching for 'sqlite3_libversion_number'.
DllImport searching in: 'e_sqlite3' ('libe_sqlite3.so').
Searching for 'sqlite3_open_v2'.
DllImport searching in: 'e_sqlite3' ('libe_sqlite3.so').
Searching for 'sqlite3_errcode'.
DllImport searching in: 'e_sqlite3' ('libe_sqlite3.so').
Searching for 'sqlite3_errmsg'.
DllImport searching in: 'e_sqlite3' ('libe_sqlite3.so').
Searching for 'sqlite3_extended_errcode'.
/proc/self/maps:
12c00000-12c40000 rw-p 00000000 00:05 14095 /dev/ashmem/dalvik-main space (region space) (deleted)
12c40000-12dc0000 ---p 00040000 00:05 14095 /dev/ashmem/dalvik-main space (region space) (deleted)
12dc0000-12e80000 rw-p 001c0000 00:05 14095 /dev/ashmem/dalvik-main space (region space) (deleted)
12e80000-12fc0000 ---p 00280000 00:05 14095 /dev/ashmem/dalvik-main space (region space) (deleted)
12fc0000-13d80000 rw-p 003c0000 00:05 14095 /dev/ashmem/dalvik-main space (region space) (deleted)
13d80000-13f40000 rw-p 01180000 00:05 14095 /dev/ashmem/dalvik-main space (region space) (deleted)
13f40000-14140000 ---p 01340000 00:05 14095 /dev/ashmem/dalvik-main space (region space) (deleted)
14140000-32c00000 rw-p 01540000 00:05 14095 /dev/ashmem/dalvik-main space (region space) (deleted)
70711000-70729000 rw-p 00000000 103:35 3156951 /data/dalvik-cache/arm64/system@framework@boot.art
70729000-7072b000 r--p 00018000 103:35 3156951 /data/dalvik-cache/arm64/system@framework@boot.art
7072b000-70737000 rw-p 00000000 103:35 3156961 /data/dalvik-cache/arm64/system@framework@boot-com.nxp.nfc.nq.art
70737000-70738000 r--p 0000c000 103:35 3156961 /data/dalvik-cache/arm64/system@framework@boot-com.nxp.nfc.nq.art
70738000-70743000 rw-p 00000000 103:35 3156975 /data/dalvik-cache/arm64/system@framework@boot-qcom.fmradio.art
70743000-70744000 r--p 0000b000 103:35 3156975 /data/dalvik-cache/arm64/system@framework@boot-qcom.fmradio.art
70744000-70745000 rw-p 00000000 103:35 3156989 /data/dalvik-cache/arm64/system@framework@boot-com.qualcomm.qti.camera.art
70745000-70746000 r--p 00001000 103:35 3156989 /data/dalvik-cache/arm64/system@framework@boot-com.qualcomm.qti.camera.art
70746000-70748000 rw-p 00000000 103:35 3157035 /data/dalvik-cache/arm64/system@framework@boot-QPerformance.art
70748000-70749000 r--p 00002000 103:35 3157035 /data/dalvik-cache/arm64/system@framework@boot-QPerformance.art
70749000-7074a000 rw-p 00000000 103:35 3157057 /data/dalvik-cache/arm64/system@framework@boot-UxPerformance.art
7074a000-7074b000 r--p 00001000 103:35 3157057 /data/dalvik-cache/arm64/system@framework@boot-UxPerformance.art
7074b000-70a0e000 rw-p 00000000 103:35 3157066 /data/dalvik-cache/arm64/system@framework@boot-core-oj.art
70a0e000-70a22000 r--p 002c3000 103:35 3157066 /data/dalvik-cache/arm64/system@framework@boot-core-oj.art
70a22000-70b57000 rw-p 00000000 103:35 3157070 /data/dalvik-cache/arm64/system@framework@boot-core-libart.art
70b57000-70b69000 r--p 00135000 103:35 3157070 /data/dalvik-cache/arm64/system@framework@boot-core-libart.art
70b69000-70ba8000 rw-p 00000000 103:35 3157083 /data/dalvik-cache/arm64/system@framework@boot-conscrypt.art
Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x20 in tid 13951 (ame.MyApp), pid 13951 (ame.MyApp)
A/libc(28156): Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x20 in tid 28156 (ame.MyApp), pid 28156 (ame.MyApp)
I/crash_dump64(28338): obtaining output fd from tombstoned, type: kDebuggerdTombstone
I//system/bin/tombstoned(1045): received crash request for pid 28156
I/crash_dump64(28338): performing dump of process 28156 (target tid = 28156)
A/DEBUG(28338): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
A/DEBUG(28338): Build fingerprint: 'Nokia/Dragon_00WW/DRG_sprout:9/PPR1.180610.011/00WW_3_53B:user/release-keys'
A/DEBUG(28338): Revision: '0'
A/DEBUG(28338): ABI: 'arm64'
A/DEBUG(28338): pid: 28156, tid: 28156, name: ame.MyApp >>> com.companyname.MyApp <<<
A/DEBUG(28338): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x20
A/DEBUG(28338): Cause: null pointer dereference
A/DEBUG(28338): x0 0000000000000000 x1 0000000000000000 x2 0000000000000000 x3 0000007fc1de5410
A/DEBUG(28338): x4 0000007c7dd749a0 x5 0000007fc1de54a0 x6 0000000000000000 x7 0000000000000000
A/DEBUG(28338): x8 0000000000000000 x9 0000000000000000 x10 0000000000000000 x11 0000000000000000
A/DEBUG(28338): x12 0000000000000000 x13 0000000000000000 x14 0000000000000000 x15 aaaaaaaaaaaaaaab
A/DEBUG(28338): x16 0000007c6dad71f8 x17 0000007c6d8fe670 x18 0000000000000008 x19 0000007c6daee560
A/DEBUG(28338): x20 0000000000000002 x21 0000000000000000 x22 0000000000000000 x23 000000000000007f
A/DEBUG(28338): x24 0000000000000000 x25 0000000000000000 x26 0000007fc1de5590 x27 0000007c64bbefd8
A/DEBUG(28338): x28 0000007c7dd74000 x29 0000007fc1de48b0
A/DEBUG(28338): sp 0000007fc1de48b0 lr 0000007c6d845658 pc 0000007c6d8fe678
A/DEBUG(28338): backtrace:
A/DEBUG(28338): #00 pc 0000000000177678 /data/app/Mono.Android.DebugRuntime-u_iAVw3y0OJVoxGy3Ukx5w==/lib/arm64/libmonosgen-64bit-2.0.so (mono_jit_info_get_method+8)
E//system/bin/tombstoned(1045): Tombstone written to: /data/tombstones/tombstone_09
W/ActivityManager(1476): Force finishing activity com.companyname.MyApp/md57495425bdd6658bb1d21a5a4e075bb9f.MainActivity
E/lowmemorykiller(794): Error writing /proc/28156/oom_score_adj; errno=22
MigrateAsync我已经从设备上卸载了应用程序，但没有成功。因此，安装VS 2019的16.1.1版会触发此问题
正在进行修复。因此，安装VS 2019的16.1.1版会触发此问题
正在进行修复。，根据您的代码，请确认路径是否正确？现在我感到困惑。项目在模拟器上正常工作，但在设备上不正常。是否为文件路径添加一些权限？这是Xamarin.Forms项目的问题。根据您的代码，请确认路径是否正确？现在我感到困惑。这些项目通常在模拟器上工作，但在设备上不工作。是否为文件路径添加一些权限？这是Xamarin.Forms项目的问题。
public async Task PrepareDatabase()
{
var path = DependencyService.Get<IFileHelper>().GetDatabaseFilePath("MyApp.db");
Debug.WriteLine($"Database path: {path}");
try
{
Context = new DataContext(path);
await Context.Database.MigrateAsync(); //The app closes after stepping in here.
}
catch (Exception e)
{
Console.WriteLine(e); //It does not enter in here.
}
}