Android 自动安装 APK

Question

我有一个 webview，它基本上能够拦截各种链接、视频、apk、href。

现在，我想要的是，一旦我从网址下载 APK，它将自动安装：

这是 shouldOverrideUrlLoading() 代码的一部分：

        else if(url.endsWith(".apk")) 
        {
        mWebView.setDownloadListener(new DownloadListener() {
                    public void onDownloadStart(final String url, String userAgent,
                    String contentDisposition, String mimetype,
                    long contentLength) {   
                    }
                    });
        Intent intent = new Intent(Intent.ACTION_VIEW ,Uri.parse(url));
        startActivity(intent);  
        return true;

如果我添加

intent.setDataAndType(Uri.parse(url), "application/vnd.android.package-archive");

，应用程序就会崩溃...

关于做什么有什么想法吗？

编辑：我能够自动启动包的下载和安装（使用 sleep() ）：

        else if(url.endsWith(".apk")) 
        {
        mWebView.setDownloadListener(new DownloadListener() {
                    public void onDownloadStart(final String url, String userAgent,
                    String contentDisposition, String mimetype,
                    long contentLength) {   
                    }
                    });
        Intent intent = new Intent(Intent.ACTION_VIEW ,Uri.parse(url));
        startActivity(intent); 
        String fileName = Environment.getExternalStorageDirectory() + "/download/" + url.substring( url.lastIndexOf('/')+1, url.length() );
        install(fileName);
        return true;

并且，正如 vitamoe 建议的那样：

protected void install(String fileName) {
    Intent install = new Intent(Intent.ACTION_VIEW);
    install.setDataAndType(Uri.fromFile(new File(fileName)),
            "application/vnd.android.package-archive");
    startActivity(install);
}

但是，我无法捕获下载完成的确切时间，可能需要创建我自己的下载功能而不使用浏览器的下载功能，有什么想法吗？

Answer 1

要在没有浏览器的情况下下载文件，请执行以下操作。像这样：

String apkurl = "http://your.url.apk";
InputStream is;
try {
    URL url = new URL(apkurl);
    HttpURLConnection con = (HttpURLConnection) url.openConnection();
    con.setRequestMethod("GET");
    con.setDoOutput(true);
    con.connect();
    is = con.getInputStream();
} catch (SSLException e) {
    // HTTPS can end in SSLException "Not trusted server certificate"
}

// Path and File where to download the APK
String path = Environment.getExternalStorageDirectory() + "/download/";
String fileName = apkurl.substring(apkurl.lastIndexOf('/') + 1);
File dir = new File(path);
dir.mkdirs(); // creates the download directory if not exist
File outputFile = new File(dir, fileName);
FileOutputStream fos = new FileOutputStream(outputFile);

// Save file from URL to download directory on external storage
byte[] buffer = new byte[1024];
int len = 0;
while ((len = is.read(buffer)) != -1) {
    fos.write(buffer, 0, len);
}
fos.close();
is.close();

// finally, install the downloaded file
install(path + fileName);

Answer 2

你可以临时。将其下载到 SD 卡，使用包管理器安装，然后再次删除。

protected void install(String fileName) {
    Intent install = new Intent(Intent.ACTION_VIEW);
    install.setDataAndType(Uri.fromFile(new File(fileName)),
            "application/vnd.android.package-archive");
    startActivity(install);
}

Answer 3

由于 Android 安全模型，无法自动安装 Apk 文件。

Answer 4

为什么不尝试使用下载管理器和在下载完成时拦截的广播接收器？下载管理器适用于 ANDROID 2.3+，

示例如下：

myWebView.setWebViewClient(new WebViewClient() {
    @Override
    public void onReceivedError(WebView view, int errorCode,
        String description, String failingUrl) {
            Log.d("WEB_VIEW_TEST", "error code:" + errorCode + " - " + description);
    }

    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
            // handle different requests for different type of files
            // this example handles downloads requests for .apk and .mp3 files
            // everything else the webview can handle normally
            if (url.endsWith(".apk")) {
                Uri source = Uri.parse(url);
                // Make a new request pointing to the .apk url
                DownloadManager.Request request = new DownloadManager.Request(source);
                // appears the same in Notification bar while downloading
                request.setDescription("Description for the DownloadManager Bar");
                request.setTitle("YourApp.apk");
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
                    request.allowScanningByMediaScanner();
                    request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
                }
                // save the file in the "Downloads" folder of SDCARD
                request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "SmartPigs.apk");
                // get download service and enqueue file
                DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
                manager.enqueue(request);
            }
            else if(url.endsWith(".mp3")) {
                // if the link points to an .mp3 resource do something else
            }
            // if there is a link to anything else than .apk or .mp3 load the URL in the webview
            else view.loadUrl(url);
            return true;                
    }
});

完整答案：用户 bboydflo
将文件下载到Android WebView（代码中没有下载事件或 HTTPClient）

下载完成时拦截的广播接收器

    private BroadcastReceiver onDownloadComplete = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) {
            // toast here - download complete 
        }
    }
};

记住在主活动中注册接收器，如下所示：

registerReceiver(onDownloadComplete, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));