android-listview

问题 I am trying to implement Searching in ListView . My ListView is comprised of HashMap in ArrayList and I managed to implement the logic but I guess there is much object and memory allocation in my approach each time the text change. Therefore I am looking for less memory allocated logic to search in my ListView with HashMap in ArrayList @Override public void onTextChanged(CharSequence s, int start, int before, int count) { //textlength = searchBar.getText().length(); //text_sort.clear();

问题 I am trying to implement Searching in ListView . My ListView is comprised of HashMap in ArrayList and I managed to implement the logic but I guess there is much object and memory allocation in my approach each time the text change. Therefore I am looking for less memory allocated logic to search in my ListView with HashMap in ArrayList @Override public void onTextChanged(CharSequence s, int start, int before, int count) { //textlength = searchBar.getText().length(); //text_sort.clear();

问题 MessagesActivity.java package org.example.fbapp; import java.io.FileNotFoundException; import java.io.IOException; import java.net.MalformedURLException; import java.util.ArrayList; import java.util.HashMap; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import com.facebook.android.AsyncFacebookRunner; import com.facebook.android.Facebook; import com.facebook.android.FacebookError; import com.facebook.android.AsyncFacebookRunner.RequestListener; import

问题 I have a question: I have a listview (from custom adapter) with a searchbar on top of it. Everything works ok, the only thing I need is when opening the activity to keep the listview hidden, or invisible, until the search has started in the searchbar (in other words, to keep the listview hidden until I start typing something in the searchbar). You can find the code here: How to start new intent after search-filtering listview? Plus a suggested solution, which unfortunately did not work, you

问题 I am adding a map to a list and then refreshing the array adapter. This was working perfectly earlier, but now that I am using an addItem() method from two different methods, it throws a NullPointer. I hope my code will clear up what I am saying: SimpleAdapter adapter; List<HashMap<String, String>> painItems = new ArrayList<HashMap<String, String>>(); ListView listthings; int[] to; String[] from; String painLevelString, timeOfPainString, textTreatmentString, painLocation, row1, row2, name;

问题 I need to achieve this: I have a sqlite table with this data slno Type Level_1 Level_2 Level_3 1 Animals Cat Null /sdcard/Video 2 Animals Cat Null /sdcard/PDF 3 Birds Aves HummingBird /sdcard/video I should have a list view with Animals and Birds , clicking on Animals shows me Cat, while Bird shows me Aves. Then so on until the content - which has to be played depending on the type. Now this can be achieved by creating a lot of Activities say for Animals level - pass level_1 for Activity_2

问题 i have to show Android Contextual action mode on long press of list view but when we long press then some multiple event trigger and Contextual menu hide so is there way to handle this problems. i also try return true on onLongClick() but its not working thanks in advance for your help 回答1: After search on stackoverflow i found my answer using this question implement GestureDetector on my listview an here is my code set GestureDetector on listview final GestureDetector gestureDetector = new

问题 Im new to android and practicing with an UI like googleplay apps, this is default view of the list : when i scroll the list view up , the action bar got scrolled up and disappeared , basically my English is too bad and i dont know how or which keyword i must use in google search to get the result like this (as you see it looks like the action bar is inside the listview ) please show me how or give me an example to learn, thank you ! 回答1: you can define your layout structure like following :

问题 Guys I'm having a strange problem: In a chat application I have a ListView and an Adapter to deal with it. If the user sends an image from gallery I will show a thumbnail on the bubble speech and add a onTouchListener to open this image on full screen. The problem is: When I'm adding the event listener it is adding to all my ImageViews! So if I click on the last imageView it is showing the right image on the full screen, but all other's before are showing the same image. I reviewd the code a

问题 I'm following this library to add drag - drop functionality my listview. Everything is fine when moving first item to second place. But when I move the listview first element to third place app crashes. In order to explain my situation I've added image. All I think it is caused at Swap items line but i think my code right. When I try to replace first item to third item, app is crashing. Any help will be valuable for me. Thanks for helpings. Here is my adapter code. public class