相关疑难解决方法(0)

我正进入(状态

开放失败: EACCES (Permission denied)

在线上 OutputStream myOutput = new FileOutputStream(outFileName);

我检查了根,我试过了android.permission.WRITE_EXTERNAL_STORAGE.

我该如何解决这个问题？

try {
    InputStream myInput;

    myInput = getAssets().open("XXX.db");

    // Path to the just created empty db
    String outFileName = "/data/data/XX/databases/"
            + "XXX.db";

    // Open the empty db as the output stream
    OutputStream myOutput = new FileOutputStream(outFileName);

    // Transfer bytes from the inputfile to the outputfile
    byte[] buffer = new byte[1024];
    int length;
    while ((length = myInput.read(buffer)) > 0) {
        myOutput.write(buffer, 0, length);
    }

    // Close the …

有没有办法在您的活动/应用程序中(以编程方式)知道用户已通过USB将手机连接到PC？