Android-下载APK文件并将其保存在手机存储中（不在SD卡中）

Question

I was trying to download one APK file from my server and save it in Phone Storage .

The following is the code that I used:

            String apkLink = "http://10.1.20.53/files/test.apk";
            URL url = new URL(apkLink);
            HttpURLConnection c = (HttpURLConnection) url.openConnection();
            c.setRequestMethod("GET");
            c.setDoOutput(true);
            c.connect();

            context.getDir("test.apk", Context.MODE_WORLD_WRITEABLE);
            FileOutputStream fos = context.openFileOutput("app_test.apk", Context.MODE_WORLD_WRITEABLE);

            InputStream is = c.getInputStream();
            fileSize = c.getContentLength();
            byte[] buffer1 = new byte[1024];
            int len1 = 0;
            int total = 0;
            while ((len1 = is.read(buffer1)) != -1) {
                total += len1;
                percentage = (int)(total*100/fileSize);
                publishProgress();
                fos.write(buffer1, 0, len1);
            }
            fos.close();
            is.close();

The same code is working fine for XML files. (When i'm downloading XML files to phone memory) .

Can someone help me with this?

Thank you

---

Actually I figured out the reason,

context.getDir("test.apk", Context.MODE_WORLD_WRITEABLE); code line creates a directory called "data/data/package_name/app_test.apk"

But FileOutputStream fos = context.openFileOutput("app_test.apk"); creates a directory called data/data/package_name/files/app_test.apk

And I was trying to read the file from data/data/package_name/app_test.apk directory.

Anyway, Now I am going to execute this file with this code,

File f = new File(getFilesDir()+ "/app_test.apk");

intent.setDataAndType(Uri.fromFile(f) , "application/vnd.android.package-archive");
startActivity(intent);

But it gives me a parse error message .

Any one can think of a solution?

Thank you.

Answer 1

I've answered to the similar question here . Considering your problem I have several different opinions why it is not working.

1. Your application download apk into its private folder and maybe PackageManager do not have permissions to read this folder. Try to download application onto sdcard and run it.
2. Maybe your .apk file is not properly signed. Have you signed it with your generated signature or you export file with the default test signature?
3. If you test this on a real device check that files can be installed from other sources (not only from Google Play market)
4. I do not remember precisely but maybe to call PackageManager to install an application you need a permission.

Answer 2

创建文件时，请尝试使用Context.MODE_WORLD_READABLE | Context.MODE_WORLD_WRITEABLE。