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我一整天都在尝试这个，但在我也给了 WRITE_EXTERNAL STORAGE PERMISSION 之后，我仍然得到这个 PERMISSION DENIED 错误。现在我在手机上尝试了这个程序。同样的许可错误出现在 logcat 上。我尝试了这个网站上提供的许多代码。它总是失败。用一些教程指导我将数据库复制到 sdcard

try {
    File sd = Environment.getExternalStorageDirectory();
    File data = Environment.getDataDirectory();

    if (sd.canWrite()) {
        String currentDBPath = "data/com.sri.tut/databases/image_storage.db";
        String backupDBPath = "image_storage.db";
        File currentDB = new File(data, currentDBPath);
        File backupDB = new File(sd, backupDBPath);

        if (currentDB.exists()) {
            FileChannel src = new FileInputStream(currentDB).getChannel();
            FileChannel dst = new FileOutputStream(backupDB).getChannel();
            dst.transferFrom(src, 0, src.size());
            src.close();
            dst.close();
        }
    }
} catch (Exception e) {
}

这是我的 Logcat 输出。

    09-14 08:36:07.663: ERROR/Movedb(12336): Error in       Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB      (Permission denied)
    09-14 08:36:09.413: ERROR/Movedb(12336): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
    09-14 08:36:09.963: ERROR/Movedb(12336): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
    09-14 08:36:10.203: ERROR/Movedb(12336): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
    09-14 08:36:10.654: ERROR/Movedb(12336): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
    09-14 08:36:10.854: ERROR/Movedb(12336): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
    09-14 08:36:11.083: ERROR/Movedb(12336): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
    09-14 08:36:11.283: ERROR/Movedb(12336): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
    09-14 08:36:11.683: ERROR/Movedb(12336): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
    09-14 08:36:11.934: ERROR/Movedb(12336): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
    09-14 08:36:12.224: ERROR/Movedb(12336): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
    09-14 08:36:12.463: ERROR/Movedb(12336): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
    09-14 08:36:12.734: ERROR/Movedb(12336): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
    09-14 08:36:13.053: ERROR/Movedb(12336): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
    09-14 08:36:13.413: ERROR/Movedb(12336): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
    09-14 08:36:13.694: ERROR/Movedb(12336): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
    09-14 08:36:13.914: ERROR/Movedb(12336): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
    09-14 08:36:14.303: ERROR/Movedb(12336): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
    09-14 08:36:14.563: ERROR/Movedb(12336): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
    09-14 08:36:14.804: ERROR/Movedb(12336): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
    09-14 08:37:42.253: WARN/PackageManager(67): Mounting container com.sri.copydata-1
    09-14 08:37:45.634: WARN/InputManagerService(67): Got RemoteException sending setActive(false) notification to pid 12336 uid 10053




    09-14 08:37:52.463: WARN/PackageManager(67): Code path for pkg : com.sri.copydata changing from /mnt/asec/com.sri.copydata-2/pkg.apk to /mnt/asec/com.sri.copydata-1/pkg.apk
    09-14 08:37:52.463: WARN/PackageManager(67): Resource path for pkg : com.sri.copydata changing from /mnt/asec/com.sri.copydata-2/pkg.apk to /mnt/asec/com.sri.copydata-1/pkg.apk
    09-14 08:38:00.773: WARN/RecognitionManagerService(67): no available voice recognition services found
    09-14 08:42:05.613: WARN/PackageManager(67): Mounting container com.sri.copydata-2
    09-14 08:42:11.294: WARN/InputManagerService(67): Got RemoteException sending setActive(false) notification to pid 13273 uid 10053
    09-14 08:42:20.063: WARN/PackageManager(67): Code path for pkg : com.sri.copydata changing from /mnt/asec/com.sri.copydata-1/pkg.apk to /mnt/asec/com.sri.copydata-2/pkg.apk
    09-14 08:42:20.063: WARN/PackageManager(67): Resource path for pkg : com.sri.copydata changing from /mnt/asec/com.sri.copydata-1/pkg.apk to /mnt/asec/com.sri.copydata-2/pkg.ap
    09-14 08:42:29.033: WARN/RecognitionManagerService(67): no available voice recognition services found
    09-14 08:42:51.374: ERROR/Movedb(14575): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
    09-14 08:43:14.043: ERROR/Movedb(14575): Error in Copyingjava.io.FileNotFoundException: /data/data/com.sri.assign/databases/AssignmentsDB (Permission denied)
4

2 回答 2

1

如果您将设备连接到您的电脑并启用

copy files to/from computer etc...

您将无权在 SD 卡上写入。

断开它与电脑的连接，然后重试或禁用复制。

于 2013-05-06T13:47:19.907 回答
0

日志显示您无权从 /data/data/com.sri.tut/databases/image_storage.db 读取数据，默认情况下，此 /data 目录是 linux 系统目录，其用户和组所有者为 'system '，不是你的应用程序，所以你没有权限。

您可以在 adb shell 中查看详细信息，您将看到如下属性： drwxrwx--x system system 2012-09-14 08:30 data

于 2012-09-14T11:36:34.067 回答