Android asynchronously loads image thumbnails

Create an asyncloadedimage class that inherits the asynctask asynchronous loading class and call the publishprogress method to update onprogressupdate to store the thumbnail information to the adapter. Listener adapter change to asynchronously load

Simple Example of Android waterfall stream

Main. xml Archfsearchresult. Java Public class archfsearchresult extends activity {protected static final string tag = "archfsearchresult"; private scrollview svresult; private linearlayout llitem; private string [] arraystr; private int

Dynamic switching on the android local Interface

Recently, I am working on Tablet development. I think the activity is as good as the web page. The Local interface is fixed, and the Local interface can be dynamically switched. The effect is as follows:   This effect consists of three

Android calls the camera function

See examples of Android photo taking, video recording, and Recording Code   Public class mycameraactivity extends activity {/** called when the activity is first created. * // @ override public void oncreate (bundle savedinstancestate) {super.

Android uses tablelayout layout to stretch the width

Layout File Layout effect: Obviously, this does not meet our expectations. The following example uses Android: stretchcolumns to automatically stretch Here we simply add an attribute Android: stretchcolumns = "*" to tablelayout, indicating that

Android file content and textview operations

Public class createfile extends activity {private bufferedreader reader; private textview tvfilereader;/** called when the activity is first created. * // @ override public void oncreate (bundle savedinstancestate) {super. oncreate

Save configuration document for Android

Public class test extends activity implements onclicklistener {private edittext etname; @ override protected void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); setcontentview (R. layout. main); etname = (edittext)

Dialog box for setting the time and date in the android call system

package; import; import; //import; import; import android.os.Bundle; import android.util.Log; import android.view.View; import

Android calls Web Service

Make a web service with whatever you want. Assume that the obtained web service address is as follows: Http: // In this web service, a sum function is provided, and its implementation is as follows:Publicint

Simple implementation of Android date Control

Main. xml    Mainactivity. Java source code:   Package COM. wanghf. demo; import Java. util. calendar; import android. app. activity; import android. app. datepickerdialog; import android. app. dialog; import android. OS. bundle; import

Android SD card read database

Add permissions in Manifest first Then add the method in mainactivity Sqlitedatabase dB; private final string database_path = android. OS. environment. getexternalstoragedirectory (). getabsolutepath () + "/vote"; private string database_filename =

In Android, tabhost switches between different activities.

Tabhost is used in many applications. Sometimes setting a view in the tab added by tabhost cannot meet the requirements, because it is quite difficult to add preferenceactivity in the view. Previously, you needed to use tabhost to switch different

In Android, the camera is called and auto-focus is taken.

Code and example:First, add the following content to the manifest file: To allow the program to obtain the permission to use the camera and auto focus function. Cameratestactivity. Java Import Android. App. activity;Import Android. OS. Bundle;Import

Android UI design drop-down menu, use, and dynamically add and delete a menu item

A single menu is used as a menu, similar to the select tag in HTML. A dialog box is displayed, showing several options for selection. The screen size of the mobile phone is limited. If you use the radiogroup single-choice button, it will occupy a

Android ongesturelistener enables sliding between the left and right sides of an image

Let's take a look. Welcome_glide.xml   Java code import; import android.content.Intent; import android.os.Bundle; import android.util.DisplayMetrics; import android.util.Log; import

Android listview layout (inheriting listactivity and using arrayadapter)

    Using listview and arrayadapter layout is the simplest of listview layout. First, we will create a component to display data, such as main. xml      The activity code is as follows:   Package android. GRID; import android. app.

Universal Android calls WebService method-parameter types are unrestricted

Note: This is just an example. The scalability and reusability are poor. I just put forward an idea and the returned XML parsing code is also poorly written.You can solve these problems when using code.================================================

Android app2sd +

I used the miui ROM and model N1. After no leakage efforts, I finally made my 8g card into a good zone into app2sd +. Now I am deeply inserting it into N1, enjoy the great pleasure of app2sd +. Many people may have this misunderstanding. Isn't

Introduction to listview in Android Layout

I have shared a lot about the android layout before. Thanks to the author of these articles. Let's take a look back: Introduction to linearlayout and absolutelayout in Android Introduction to relativelayout and framelayout of Android

Android listview layout 2 (using simpleadapter to bind data)

Main. xml main layout file, code User. xml component layout File Code Main activity, listview. Java code Package android. listview; import Java. util. arraylist;

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