[英]C++ Builder 11.1 Android can't write a file to the Shared Documents folder
我在使用 C++ Builder 11.1 Android 嘗試將文件寫入共享文檔文件夾時遇到困難。 它適用於 C++ Builder 10.3.1,但不適用於 11.1
我在項目選項對話框中正確設置了權限:危險 - 讀取外部存儲 = true 危險 - 寫入外部存儲 = true
在 OnFormCreate 方法中,我輸入了必要的運行時權限,如下所示:
String FPermREAD;
String FPermWRITE;
DynamicArray<String> permissions;
FPermREAD = JStringToString(TJManifest_permission::JavaClass->READ_EXTERNAL_STORAGE);
FPermWRITE = JStringToString(TJManifest_permission::JavaClass->WRITE_EXTERNAL_STORAGE);
permissions.Length = 2;
permissions[0] = FPermREAD;
permissions[1] = FPermWRITE;
PermissionsService()->RequestPermissions(permissions, LocationPermissionRequestResult);
在寫入文件的例程中...
AnsiString SharedPath;
AnsiString FileName;
FILE *OutStream;
SharedPath = System::Ioutils::TPath::GetSharedDocumentsPath();
// SharedPath = "/storage/emulated/0/Documents"
FileName = SharedPath +"/"+MyFileName;
OutStream = fopen(FileName.c_str(),"wb"); // This fails in 11.1 but not in 10.3.1
if(OutStream) {
// write the file here
fclose(OutStream);
}
我的 Android 設備是 Android 10。任何想法為什么會發生這種情況以及如何解決它?
將 requestLegacyExternalStorage="true" 添加到清單文件中的應用程序標記。
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