list of android versions

Like whatListList.add ("Test1");List.add ("Test2");I want to convert the list to {"Key": ["Test1", "Test2"]} in this form.Now I pass Jsonstringer jsonstringer=new Jsonstringer ();Part of the code is omitted. Jsonstringer.key ("key"). Value (list). The last converted JSON "key" is a string of value values used, in the form of {"Key": "[Test1,test2]"}. I do not know how to implement {"Key": ["Test1", "Test2"]

topcenterimageview. I believe we will be more puzzled, let us see what he is:Package Com.example.scrolltest;import Android.content.context;import Android.graphics.matrix;import Android.util.attributeset;import android.widget.imageview;/** * Custom view allowing an image to being displayed with a "top Crop "Scale type * * @author Nicolas Pomepuy * */public class Topcenterimageview extends ImageView {public Topcenterimag Eview (context context, AttributeSet attrs, int defstyle) {Super (context, a

The previous section has set up a group in the OpenFire server, This section continues to see how to get a buddy list, Get roster through the connection object, so you can use Roster.getgroups () to get all the groups, using Group.getentries () to get all the users in the group The code is very simple, the following is the output: With the name of the group and the Friends in the group, fill in the Baseexpandablelistadapter, so as to achiev

The list of files in the SD card is displayed through ListView in Android there are two methods, one is: Through the inheritance listactivity display, the second is: use Baseadapter display. Baseadapter is a common base class adapter that provides display data for some controls, such as ListView and spinner. Here are the steps to use the Baseadapter class to display the SD card via ListView: 1.main.xml int

How intent in Android delivers ArraylistIntent can pass listYou can do this here.Intent Intent = new intent ();Intent.putextra ("List", new arraylistIntent Intent = Getintent ();arraylistSystem.out.println ("ArrayList title:" +list.get (0). Get ("title"));But this will cause a warning.Type safety:unchecked cast from Serializable to arraylistThe solution was not found, though it was only a warning, but it wa

Import android. widget. button; import android. widget. toast; public class singlechoiceitemstest extends activity implements onclicklistener {private string [] province = new string [] {"Shanghai", "Beijing", "Hunan", "Hubei ", "Hainan"}; private button btnsinglechoicelist; // click the instance of the event object private buttononclick = new buttononclick (1);/** called when the activity is first created.

Next, let's move to the android Learning Series (10) -- drag the App list listview (top). We will continue to implement the drag-and-drop effect of listview. 7. Override the ontouchevent () method.In this method, we mainly deal with dragging and dropping.Drag: the image of the selected item slides with the finger; put down is to exchange data when the drag ends.The overall structure of the method is as fo

Android gets the wifi list. If you ignore this details, your software may crash. androidwifi I. Business Description Recently, the company has a small demand,The user clicks the wifi scan button (Note: The user actively clicks the wifi scan button)The app scans nearby wifi and displays it in listView. That's all. apps do not need to connect to a certain wifi. It seems simple. If not, the app may be directly

Transferred from: http://blog.csdn.net/yabg_zhi_xiang/article/details/51727844Set the default value in the system in Settingsprovider, we can frameworks\base\packages\settingsprovider\res\values\ Default.xml file to see some of the common default values, this time I will explain in detail the meaning of the default. Of course, this is not all the default values, and all defaults are worth defining to view in Frameworks\base\core\java\android\provider\

5.0 offers two new widgets that use the style and animation of the material design: Recyclerview a more pluggable ListView that supports different layout types and has improved performance. (list type) CardView A card that allows you to display important information inside and maintain a coherent vision and feeling. (Card type) It's two in Sdk/extras/android/support/v7/cardview and Sdk/extras

ProgramRunning or exiting. The application is not displayed in the list of recent programs that press the Home Key for hiding the process. The solution is as follows: Set attributes at the main activity:Android: excludefromrecents = "true" For example: Package = "com. mingli. test"Android: versioncode = "1"Android: versionname = "1.0" type = "codeph" text

In the previous article, I introduced how to query the multimedia files in the sdcard in the program and display them in the playlist. However, if you delete or add some multimedia files in the sdcard, how can I update the playlist? Here I will share some of my solutions in the project, hoping to help you. First of all, I will briefly introduce how Android scans the multimedia information in the sdcard, please read the stay blog: http://www.cnblogs.co

is the Simpleadapter parameter list.* @param context* @param Resources* @param list* @param from* @param to*/public Myadapter, int,arraylistSuper ();This.context = context;This.resources = resources;This.list = list;This.from = from;This.to = to;} /*** The remaining problem is to implement the baseadapter in sequence*/@Overridepublic int GetCount () {//This me

Needless to say, the drop-down list is often the spinner control.Directly on the code: PackagePeng.liu.testview;Importandroid.app.Activity;ImportAndroid.os.Bundle;ImportAndroid.view.View;ImportAndroid.widget.AdapterView;ImportAndroid.widget.ArrayAdapter;ImportAndroid.widget.Spinner;ImportAndroid.widget.Toast; Public class mainactivity extends Activity { PrivateSpinner Spinner; string[] data =Newstring[]{"Andro