imageview

问题 I receive and parse JSON from the internet in my app delegate. In JSON there are links to images that must be displayed in table cells (1 image per cell). If i fetch images in cellForRowAtIndexPath method, it takes quite some time to load the whole view. I use this code in cellForRowAtIndexPath: NSURL *url = [NSURL URLWithString:imageUrl]; NSData *data = [NSData dataWithContentsOfURL:url]; cell.imageView.image = [UIImage imageWithData:data]; How should i fetch these images without slowing

问题 I'm trying to change the image of a ImageView immediately after I click it. I tried using .setImageDrawable and calling .invalidate() on that view, without any success. I'm probably not doing it right, but I'm trying to click the image, put the Thread to sleep for 2 seconds then display another image to the user. The code is quite simple, and it's something like this: myImage.setImageResource(R.id.myPicture); ... computations ... put the thread to sleep for 2 seconds myImage.setImageResource

问题 I have 3-4 activities in the application and all of them have some event listeners that work nicely. However only on one activity i simply can't get the event handling to work. I tried the solution from this thread:http://www.anddev.org/view-layout-resource-problems-f27/ontouch-not-called-t16578.html It doesn't work for me. I tried to manually set OnClickListeners for ImageViews from java code, android:onClick from XML. It seems that some other component handles all the events, or my activity

问题 MainActivity: public class AndroidCustomGalleryActivity extends Activity { private int count; private Bitmap[] thumbnails; private boolean[] thumbnailsselection; private String[] arrPath; private ImageAdapter imageAdapter; ArrayList<String> f = new ArrayList<String>();// list of file paths File[] listFile; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_android_custom_gallery); getFromSdcard(); GridView imagegrid =

问题 I"m trying to make background image in black activity.. this is the image i try to upload.. i add a photo in res -> new -> image asset and i locate the image and select it.. after i add "imageview" to my activity and choose the resourse that i have created... this is how it go: 回答1: i found the solution.. transfer the image to the folder drawable.. then click on background -> project ___ get down down until you found it and TA DAM!!! do not name the file with special chars like - or _ . thx

问题 I have a xml file in drawable to set border for imageview know as imgborder.xml as below <?xml version="1.0" encoding="UTF-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android"> <solid android:color="#FFFFFF" /> <stroke android:width="1dp" android:color="#000000" /> <padding android:left="1dp" android:top="1dp" android:right="1dp" android:bottom="1dp" /> </shape> May I know how can I apply it dynamically in code? Like android:background in xml layout? Thank you. 回答1: You can

问题 I need to know how he takes drawable object. I'm collecting some ImageView objects in array, they have background images that are rather big in resolution so they take lot of memory... I have read somewhere that it will automatically create image with resolution that my imageView have, so i think it will take less memory than first one... Please tell me, if i set scaleType property, will it scale that image? Will that help me to save memory? 回答1: It won't save you any memory to set the

问题 In my application i have an image that should have 25% width and height of screen. I hope this is clear. This is what i'm already tried but doesn't work. Thank you. <ImageView android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="0.25" android:src="@drawable/fish" android:scaleType="fitCenter" /> 回答1: Just use this with Linear Layout <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools"

问题 I have the following in my main.xml the image marker does not fill the width of the device? <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:screenOrientation="portrait"> <ImageView android:id="@+id/ImageView01" android:layout_height="wrap_content" android:layout_width="fill_parent" android:src="@drawable/marker"> <

问题 i am creating a simple android application that will display several images and on the selected one the system will display it in the image view .. but the problem is that the system display the id of the images than on the select of specific image the system display the image in the image view . can anyone help me to fix this problem ?? log cat 12-03 08:57:16.493: E/AndroidRuntime(3126): Caused by: java.lang.ClassCastException: android.widget.ImageView cannot be cast to android.widget