Question

我想将apk中的文本文档推送到/ system目录（是的，它是root用户的应用程序），并想知道我将如何做到这一点:)我的txt文件在assests文件夹中，但它可能是如果需要使用

Answer 1

将文本文件放在项目的assets目录中，然后使用以下线程中的代码将其解压缩到文件系统： How to copy files from 'assets' folder to sdcard?

编辑：这是我使用的一些代码。对于sourceFileName，传递相对于assets文件夹的assets文件的名称（例如，如果您在assets文件夹中有myFile.txt，则传递myFile.txt）。对于目标文件，传递完整路径（例如/data/data/com.mycompany/mypackage/myFile.txt）。 context是当前活动（例如MyActivity.this）。

private boolean copyFile(Context context, String sourceFileName, String destFileName)
{
    AssetManager assetManager = context.getAssets();

    File destFile = new File(destFileName);

    File destParentDir = destFile.getParentFile();
    destParentDir.mkdir();

    InputStream in = null;
    OutputStream out = null;
    try
    {
        in = assetManager.open(sourceFileName);
        out = new FileOutputStream(destFile);

        byte[] buffer = new byte[1024];
        int read;
        while ((read = in.read(buffer)) != -1)
        {
            out.write(buffer, 0, read);
        }
        in.close();
        in = null;
        out.flush();
        out.close();
        out = null;

        return true;
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }

    return false;
}

EDIT2：原来/ system分区以只读方式挂载，即使在root设备上也是如此。这可能有所帮助：Android: how to mount filesystem in RW from within my APK? (rooted, of course)

Answer 2

您可以尝试此功能（找到here）：

public String runSystemCommand(String cmd)
{
    try {
        // Executes the command.
        Process process = Runtime.getRuntime().exec(cmd);

        // Reads stdout.
        // NOTE: You can write to stdin of the command using
        //       process.getOutputStream().
        BufferedReader reader = new BufferedReader(
                new InputStreamReader(process.getInputStream()));
        int read;
        char[] buffer = new char[4096];
        StringBuffer output = new StringBuffer();
        while ((read = reader.read(buffer)) > 0) {
            output.append(buffer, 0, read);
        }
        reader.close();

        // Waits for the command to finish.
        process.waitFor();

        return output.toString();
    } catch (IOException e) {
        throw new RuntimeException(e);
    } catch (InterruptedException e) {
        throw new RuntimeException(e);
    }       
}

我自己也是这样尝试的：

    String cmdoutput = this.runSystemCommand("/system/bin/ls .");
    Log.d("SampleAndroidInterfaceActivity", "runSystemCommand() returned: " + cmdoutput);

并且运作良好。这是我的输出：

05-16 17:50:10.423: runSystemCommand() returned: acct
05-16 17:50:10.423: cache
05-16 17:50:10.423: config
05-16 17:50:10.423: d
05-16 17:50:10.423: data
05-16 17:50:10.423: default.prop
05-16 17:50:10.423: dev
05-16 17:50:10.423: etc
05-16 17:50:10.423: init
05-16 17:50:10.423: init.goldfish.rc
05-16 17:50:10.423: init.rc
05-16 17:50:10.423: mnt
05-16 17:50:10.423: proc
05-16 17:50:10.423: root
05-16 17:50:10.423: sbin
05-16 17:50:10.423: sdcard
05-16 17:50:10.423: sys
05-16 17:50:10.423: system
05-16 17:50:10.423: ueventd.goldfish.rc
05-16 17:50:10.423: ueventd.rc
05-16 17:50:10.423: vendor

如果您知道txt文件的绝对路径，则可以使用cp轻松复制它。

将文件从apk复制到内部存储

2 个答案: