在 android/Hybrid 应用程序中,我使用以下代码来检查“设备上是否安装了打开文件的查看器”
private boolean detectFileViewer(String fileExt) throws InterruptedException,
JSONException {
try {
PackageManager packageManager = cordova.getActivity().getPackageManager();
Intent testIntent = new Intent(Intent.ACTION_VIEW);
testIntent.setType( MimeTypeMap.getSingleton().getMimeTypeFromExtension(fileExt));
if (packageManager.queryIntentActivities(testIntent, PackageManager.MATCH_DEFAULT_ONLY).size() > 0) {
return true;
} else {
return false;
}
} catch (Exception e) {
return false;
}
}
在 Android Lollipop 上,如果只有默认的 PDF 查看器,即“Drive PDF Viewer”存在,上面的代码将返回 false as
PackageManager.MATCH_DEFAULT_ONLY
返回空数组。 此外,上面的代码在以前版本的 Android 上运行良好。
在装有 Android Lollipop 的 nexus 4 和 nexus 5 上测试。
最佳答案
public static void openFile(final Context context, File url, final Activity activity) throws IOException {
// Create URI
File file = url;
Uri uri = Uri.fromFile(file);
Intent intent = new Intent(Intent.ACTION_VIEW);
if (url.toString().contains(".doc") || url.toString().contains(".docx")) {
// Word document
intent.setDataAndType(uri, "application/msword");
} else if (url.toString().contains(".pdf")) {
// PDF file
intent.setDataAndType(uri, "application/pdf");
} else if (url.toString().contains(".ppt") || url.toString().contains(".pptx")) {
// Powerpoint file
intent.setDataAndType(uri, "application/vnd.ms-powerpoint");
} else if (url.toString().contains(".xls") || url.toString().contains(".xlsx")) {
// Excel file
intent.setDataAndType(uri, "application/vnd.ms-excel");
} else if (url.toString().contains(".zip") || url.toString().contains(".rar")) {
// WAV audio file
intent.setDataAndType(uri, "application/x-wav");
} else if (url.toString().contains(".rtf")) {
// RTF file
intent.setDataAndType(uri, "application/rtf");
} else if (url.toString().contains(".wav") || url.toString().contains(".mp3")) {
// WAV audio file
intent.setDataAndType(uri, "audio/x-wav");
} else if (url.toString().contains(".gif")) {
// GIF file
intent.setDataAndType(uri, "image/gif");
} else if (url.toString().contains(".jpg") || url.toString().contains(".jpeg") || url.toString().contains(".png")) {
// JPG file
intent.setDataAndType(uri, "image/jpeg");
} else if (url.toString().contains(".txt")) {
// Text file
intent.setDataAndType(uri, "text/plain");
} else if (url.toString().contains(".3gp") || url.toString().contains(".mpg") || url.toString().contains(".mpeg") || url.toString().contains(".mpe") || url.toString().contains(".mp4") || url.toString().contains(".avi")) {
// Video files
intent.setDataAndType(uri, "video/*");
} else {
intent.setDataAndType(uri, "*/*");
}
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
try {
context.startActivity(intent);
} catch (ActivityNotFoundException e) {
Toast.makeText(context, "There isn't any program open this file!!", Toast.LENGTH_SHORT).show();
}
}
你想要这样吗?还是只是检查一下?
关于android - 检查查看器以在 Android Lollipop 中打开文件,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27249165/