android-widget

问题 When I use findViewById() I get an error. What method should I use, instead of findViewById() in my app widget? P.S.: I want to do something like: Button a = (Button) findViewById(R.id.button); in my screen widget 回答1: You don't need a findViewById() in Widget just do this create a static variable, which will be your onClick name tag: private static final String MyOnClick = "Button OnClick"; Set this onClick tag to your view as below: RemoteViews views = new RemoteViews(context.getPackageName

问题 This question already has answers here : onGetViewFactory only called once for multiple widgets (2 answers) Closed 2 years ago . I'm building a widget to load a list of ingredients per recipe. My goal is to be able to have multiple instances of the widget and have their ingredient-list (ListView) loaded/updated independently. I've setup a configuration activity for user to select the recipe. After configuration and populating the remoteViews and making the RemoteAdapter for my list of

问题 I want to take input, a URL or just a website name like, www.google.com from EditText in Android and on user click on the Button to submit or when the EditText looses the focus the URL should be validated, like it is in the format " www.anyURL.com "... How can I do this? Is there any inbuilt functionality available in android? 回答1: Short answer Use WEB_URL pattern in Patterns Class Patterns.WEB_URL.matcher(potentialUrl).matches() It will return True if URL is valid and false if URL is invalid

问题 I followed the android developer link to install sample package. However, when I expand the package list of Android platform, there is no " Sample for SDK " option (checkbox) available. Why?? I have installed Android from version 2.3.3(API10) to 4.0.3(API 15), none of them contain the option for downloading sample package. Why? Anyone has the same problem? 回答1: //you need to download it there is an option for that. if it show already installed you need to go to the folder called <sdk>/samples

问题 In my Android project I have restricted Edittext to allow only Alphanumeric characters. I have using below code snippet to achieve this <EditText android:id="@+id/edt_text" android:layout_width="140dp" android:layout_height="wrap_content" android:layout_margin="5dp" android:digits="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890" android:ems="10" android:imeOptions="actionNext" android:maxLength="8" android:padding="5dp" android:singleLine="true" /> But while using this code if

问题 I know how to center the text in the TextView and how to center the TextView inside its parent layout, but what I'm looking for is how to center a title (text centered but second line starting at the same point). What I'm looking for is this: | Centered | | right! | or this: | Center | Not this (text centered): | Too | | centered! | or this (TextView centered): |Centered | |wrong! | or this (with padding and left): | |Also | | | |wrong! | | Did anyone understad this? Is it possible to do this

问题 I am new to integrating Twitter. I have implemented Twitter in my application with this code: // Create file File picture = new File(APP_FILE_PATH + "/myAwesomeDrawing.png"); // Create TwitPic object and allocate TwitPicResponse object TwitPic tpRequest = new TwitPic("username", "password"); TwitPicResponse tpResponse = null; // Make request and handle exceptions try { tpResponse = tpRequest.uploadAndPost(picture, "Image Uploaded from My AndroidDrawing App..."); } catch (IOException e) { e

问题 I am Developing Application with multiple device support. Now i want to know which Layout is Galaxy Tab Support? I mean like layout-large or layout-small, layout-xlarge or anyother ?? Samw with which drawable is supported by galary tab for images to place. ? Thanks. 回答1: You can also use the new size qualifiers in the supports-screens.(for android 3.2 and above) <manifest ... > <supports-screens android:requiresSmallestWidthDp="600" /> ... </manifest> Here are some numbers for typical screen

问题 I am implementing progressbar in my android app. In my app i want to display progressbar when images are loading from the web after loading all images the loader should be stopped. I seen some example of progressbar in that it is displaying for predefined period of time. But i want the progressbar display dynamically depends on the time to load images from the web. 回答1: You shoud use an AsyncTask. The Javadoc for it has an example of just what you want to do : private class DownloadFilesTask

问题 I have tried many times but i know that i am missing something,could you Guys please explain it.. Following is what, i have tried <ImageView android:id="@+id/Dicimage" android:layout_width="130px" android:layout_height="100px" android:src="@drawable/slang" android:background="@drawable/corner" android:padding="1dp"/> Created Corner XML in resource folder <?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle"> <solid