到目前为止,我已经有了这个方法,但它似乎缺少了一些东西
例如,我有一个文件/sdcard/sound.3ga,它返回false (就像没有任何活动可以处理这种类型的文件),但是当我从文件管理器打开它时,它会用媒体播放器打开,没有任何问题
我认为这个意图并不完整,我需要做更多的事情来确保只有在没有活动可以处理这个意图的情况下,handlerExists变量才会为false
PackageManager pm = getPackageManager();
Intent intent = new Intent(android.content.Intent.ACTION_VIEW);
String extension = android.webkit.MimeTypeMap.getFileExtensionFromUrl(Uri.fromFile(new File(uriString)).toString());
String mimetype = android.webkit.MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
intent.setDataAndType(Uri.fromFile(new File(uriString)),mimetype);
boolean handlerExists = intent.resolveActivity(pm) != null;
发布于 2015-05-02 04:17:49
edwardxu的解决方案非常适合我。
我只是想澄清一下:
PackageManager packageManager = getActivity().getPackageManager();
if (intent.resolveActivity(packageManager) != null) {
startActivity(intent);
} else {
Log.d(TAG, "No Intent available to handle action");
}
发布于 2013-03-14 19:15:21
PackageManager manager = context.getPackageManager();
List<ResolveInfo> infos = manager.queryIntentActivities(intent, 0);
if (infos.size() > 0) {
//Then there is an Application(s) can handle your intent
} else {
//No Application can handle your intent
}
你有没有尝试过这个意图?
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.fromFile(yourFileHere));
发布于 2015-02-16 10:51:41
if (intent.resolveActivity(getPackageManager()) == null) {
// No Activity found that can handle this intent.
}
else{
// There is an activity which can handle this intent.
}
https://stackoverflow.com/questions/15407502
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