Question

我有一个在主页按钮上带有指纹传感器的设备。其他应用程序似乎可以识别并正确处理它，但是我正在构建的应用程序在以下几个步骤中失败了：

我正在使用android.support.v4.hardware.fingerprint.FingerprintManagerCompat

// at this point isHardwareDetected returns false
val fingerprintManager = FingerprintManagerCompat.from(context)
if (!fingerprintManager.isHardwareDetected) {
    return false
}

如果我跳过硬件检测步骤，它仍然会失败

// hasEnrolledFingerprints returns false even tough there 
// are couple of fingerprints registered
if (!fingerprintManager.hasEnrolledFingerprints()) {
    return false
}

设备为UMI Plus E Android 6.0.1

这可能是什么问题？

另外，这是我有关指纹的清单：

<uses-permission android:name="android.permission.USE_FINGERPRINT" />
<uses-feature android:name="android.hardware.fingerprint" android:required="false" />

修改

我使用转载库https://github.com/ajalt/reprint

解决了此问题

Answer 1

这是github中指纹认证的简单示例，请检查并查看结果：

Fingerprint Authentication

您也可以使用此辅助方法进行进一步的使用：

public static boolean isFingerprintDefined(@NonNull Context context) {
    return FingerprintManagerCompat.from(context).isHardwareDetected() && FingerprintManagerCompat.from(context).hasEnrolledFingerprints();
}

Answer 2

似乎更像是硬件问题，

尝试删除所有指纹并添加新指纹，如果在添加Hardware not ready等新指纹时出错，则表示硬件传感器有问题。
您还可以尝试在设备上拨打*＃808＃并进行指纹测试。并进行指纹自动测试，它将为您的硬件传感器提供简短的诊断报告。

Answer 3

我记得很久以前，我遇到过同样的问题。这是支持库中的Private Sub Worksheet_Change(ByVal Target As Range) ''-Select input cell here If Not Intersect(Target, Range("A1")) Is Nothing Then If Target.Value <> "" Then ''-Turns off visual updating Application.ScreenUpdating = False ''-Returns value applied in input cell later used as row reference. rwnum = Target.Value Dim wb As Workbook ''Alt 1'For user selected workbook 'Dim dP As String 'dP = Environ$("USERPROFILE") & "\" & "Downloads": ChDrive "C:" 'ChDir dP 'Dim fNP As Variant 'fNP = Application.GetOpenFilename(FileFilter:="Excel Files (*.XLS), *.XLS", Title:="Select file") 'Set wb = Workbooks.Open(fNP) ''Alt 2'For static workbook name with static path ' Your path here ' Set wb = Workbooks.Open("C:\Users\Drew\Downloads\Weekly stats.xls") ''Alt 3'For static workbook name with semi dynamical path 'Set wb = Workbooks.Open(Environ$("USERPROFILE") & "\" & "Downloads\" & "Weekly stats.xls") 'C:\Users\UserName \ Downloads\ Weekly stats.xls Dim rng As Range Set rng = wb.ActiveSheet.Range("A1").CurrentRegion ''Alt 1'Static columns, select yours! 1=column A, 2=column B and so on.. c1 = 1: c2 = 2: c3 = 3: c4 = 4: c5 = 16 ''Alt 2'Dynamic columns, if entire columns would move for some reason 'With rng ' c1 = WorksheetFunction.Match("Example header text 1", .Rows(1), 0) ' c2 = WorksheetFunction.Match("Example header text 2", .Rows(1), 0) ' c3 = WorksheetFunction.Match("Example header text 3", .Rows(1), 0) ' c4 = WorksheetFunction.Match("Example header text 4", .Rows(1), 0) ' c5 = WorksheetFunction.Match("Example header text 5", .Rows(1), 0) 'End With Dim Mrng As Range ''-Where content is "pasted" ''Alt 1'Static destination 'Set Mrng = Me.Range("D2:S2") ''Alt 2'Same row as in closed workbook and columns 4 to 19(D:S) 'Set Mrng = Me.Cells(rwnum, 4).Resize(, 16) ''Alt 3'Next empty row in columns 4 to 19(D:S) Set Mrng = Me.Range("D1048576").End(xlUp).Offset(1).Resize(, 16) ''-Adds the value to earlier selected columns in above selected row With Mrng .Cells(c1).Value = rng(rwnum, c1) .Cells(c2).Value = rng(rwnum, c2) .Cells(c3).Value = rng(rwnum, c3) .Cells(c4).Value = rng(rwnum, c4) .Cells(c5).Value = rng(rwnum, c5) End With ''-Closes the "closed workbook" without saving any changes wb.Close savechanges:=False ''-Returns selection to input cell for further testing Target.Select ''-Turns on visual updating Application.ScreenUpdating = True End If End If End Sub类的问题。尝试从平台上使用FingerprintManagerCompat类，或将其更新为最新版本的支持库。

无法识别Android指纹扫描仪

3 个答案: