如何将我的 apk 的权限更改为 -rw -rw rw- 并安装它？

Question

我正在将数据从服务器发送到我的平板电脑一个 apk 文件，我将用它安装它，

Intent intent = new Intent(Intent.ACTION_VIEW);
    intent.setDataAndType(Uri.fromFile(new File(Environment.getExternalStorageDirectory() + "/download/" + "app.apk")), "application/vnd.android.package-archive");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    startActivity(intent);

我有以下错误：解析错误，我想像这样更改我的 apk 文件的权限 -rw -rw rw- ?。

Answer 1

public class Chmod {
    public static void lancer() {

    String[] args2 = { "chmod", "604", "/data/data/com.so.and/sofiane.apk" };
    exec(args2);
}
    public static String exec(String[] args) {
        String result = "";
        ProcessBuilder processBuilder = new ProcessBuilder(args);
        Process process = null;
        InputStream errIs = null;
        InputStream inIs = null;
        try {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            int read = -1;
            process = processBuilder.start();
            errIs = process.getErrorStream();
            while ((read = errIs.read()) != -1) {
                baos.write(read);
            }
            baos.write('\n');
            inIs = process.getInputStream();
            while ((read = inIs.read()) != -1) {
                baos.write(read);
            }
            byte[] data = baos.toByteArray();
            result = new String(data);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (errIs != null) {
                    errIs.close();
                }
                if (inIs != null) {
                    inIs.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
            if (process != null) {
                process.destroy();
            }
        }
        return result;
    }
}