如何以程序的方式加载adobe reader阅读器

我的一个应用程序是这样实现：通过我的应用程序，用户可以阅读pdf文件；如果没有pdf阅读器，程序会自动从网站上下载并安装它。以下代码是用于阅读pdf文件：

File file = new File("/sdcard/sample.pdf");
PackageManager packageManager = getPackageManager();
Intent testIntent = new Intent(Intent.ACTION_VIEW);
testIntent.setType("application/pdf");
List list = packageManager.queryIntentActivities(testIntent, PackageManager.MATCH_DEFAULT_ONLY);
if (list.size() > 0 && file.isFile()) {
    Intent intent = new Intent();
    intent.setAction(Intent.ACTION_VIEW);
    Uri uri = Uri.fromFile(file);
    intent.setDataAndType(uri, "application/pdf");
    startActivity(intent);
}

现在我想问的是：
1. 如何判断电话中有没有安装adobe reader阅读器？
2. 如何在电话中以程序的方式安装adobe reader阅读器？

Intent intent;
        intent = new Intent(Intent.ACTION_VIEW);
        intent.setDataAndType(file, "application/pdf");
        try {
            startActivity(intent);
        } catch (ActivityNotFoundException e) {
            // No application to view, ask to download one
            AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.setTitle("No Application Found");
            builder.setMessage("Download one from Android Market?");
            builder.setPositiveButton("Yes, Please",
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            Intent marketIntent = new Intent(Intent.ACTION_VIEW);
                            marketIntent
                                    .setData(Uri
                                            .parse("market://details?id=com.adobe.reader"));
                            startActivity(marketIntent);
                        }
                    });
            builder.setNegativeButton("No, Thanks", null);
            builder.create().show();
        }
    }

你可以使用这段代码：

private void loadDocInReader(String doc) throws ActivityNotFoundException, Exception {

try {
    Intent intent = new Intent();

    intent.setPackage("com.adobe.reader");
    intent.setDataAndType(Uri.parse(doc), "application/pdf");

    startActivity(intent);

} 

catch (ActivityNotFoundException activityNotFoundException) {
            activityNotFoundException.printStackTrace();

            throw activityNotFoundException;
} 
catch (Exception otherException) {
            otherException.printStackTrace();

            throw otherException;
}
}

如果Adobe reader没有安装，
请查看这里https://market.android.com/details?id=com.adobe.reader安装。