我想将数据从PC传输到我使用以下代码的安卓手机，我无法获得工作目录

Question

我在代码中得到以下错误:

. io .IOException:运行exec()时出错。命令:["/adb"， -s, 9774d56d682e549c, push， "C:Documents, and, SettingsMy, Documentsothermusicb.wma， "， sdcardmusic]工作目录:null环境:null

public class TransferData extends Activity {
private String device_id  ;
private String from = "C:\Documents and Settings\My Documents\other\music\b.wma ";
private String to ="\sdcard\music";
 private static final String ADB_PUSH = """ /*+ Utility.getWorkDir()*/ + File.separator + "adb" -s %s push "%s" %s";
   @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.splash);
     device_id = Secure.getString(getBaseContext().getContentResolver(),Secure.ANDROID_ID); 
     push(device_id,from,to);
}
   /**  Pushes a file to a connected device via ADB
    * @param deviceId Device serial number 
    * @param from Path of source file (on PC)  
    * @param to Path of file destination (on device)  */
   public static void push(String deviceId, String from, String to) {
    try { 


        String cmd = String.format(ADB_PUSH, deviceId, from, to);
        System.out.println("adb push: " + cmd);
        Process p = Runtime.getRuntime().exec(cmd);
        InputStream is = p.getInputStream();
        InputStreamReader isr = new InputStreamReader(is);
        BufferedReader br = new BufferedReader(isr);
        String line;
        while ((line = br.readLine()) != null) {
            System.out.println("adb: " + line);
            }
        } catch (IOException e) {
            System.out.println(e);
            }
        } 

}

Answer 1

您无法从android访问您的计算机磁盘驱动器。

把b.wma放在assets文件夹里。

则使用以下代码使用b.wma

 try {
    InputStream  is = context.getAssets().open(url);
    } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
      }