public void install(String urlContainsFileName) {
String apkName = urlContainsFileName.substring(urlContainsFileName.lastIndexOf('/') + 1);
String filePath = Environment.getExternalStorageDirectory()
.toString() + "/lenovo";
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse("file://" + filePath + "/" + apkName), "application/vnd.android.package-archive");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
mContext.startActivity(intent);
}