Android

[2012-10-20 14:19:08-demo] --------------------------------[14:19:08-demo] Android launch![2012-10-20 14:19:08-demo] the connection to ADB is down, and a severe error has occured.[14:19:08-demo] You must restart ADB and eclipse.[14:19:08-demo]

There are three main ways to tile images for Android: 1) system API; 2) xml configuration; 3) custom Rendering Method 1:System API implementation Bitmap bitmap = bitmapfactory. decoderesource (getresources (), R. drawable. PIC); // bitmap =

/*** @ Title hassd * @ description determines whether an SD card exists * @ Param @ return * @ return Boolean * @ date 2012-10-25 9:03:56 */private Boolean hassd () {If (environment. getexternalstoragestate (). equals (Android. OS. environment.

1. Improve UI performance 1. Improve the efficiency of adapter and adapterview Reuse the generated item View Add viewholder to avoid repeated searches for controls to be modified Cache item data Segmented reality Instance: class OptAdapter extends

// Create an anonymous implementation of OnClickListenerprivate OnClickListener mCorkyListener = new OnClickListener() {    public void onClick(View v) {      // do something when the button is clicked    }};protected void onCreate(Bundle

I. Use handler and message to update the page Private handler mhandler = new handler (){ Public void handlemessage (Message MSG ){Switch (msg. What ){Case 1: // Add functionsInt I = integer. parseint (textview. gettext () + "");If (I> = 0 & I ++

I. Use timer and timertask Timer timer = new timer (); Mytimertask timertask = new mytimertask (); Timer. Schedule (timertask, 3000, 1); // wait for 3 seconds and run once // Timer. Cancel (); // cancel Class mytimertask extends timertask { @

Sometimes there are many small modules under a large project. If there is no connection between small modules, you can use each small module as a separate project to generate an APK. In this case, how to put multiple APK files in a project is

For example, one thing I want to do is to connect a main interface (main activity) to many different sub-function modules (child activity ), after the sub-module is finished, it will return to the main interface. It may also return some data

Contactactivity. javapackage Yu. hong. contact; import android. app. activity; import android. content. contentresolver; import android. content. intent; import android. database. cursor; import android.net. uri; import android. OS. bundle; import

In Android development, we often need to classify and operate data. For lightweight data storage, we may not need to use SQLite or XML with imperfect efficiency and class libraries, because sharedpreferences does not have the data enumeration method,

Android mobile phones use the "menu" button to display menus. To implement the menu function, you must first create a menu by using oncreateoptionmenu. There are two ways to create a menu: one is to directly import an XML file with a menu, one is to

From: http://androidbiancheng.blogspot.com/2011/05/drawingcache.html When you click the button, the application captures the screen effect display through the drawing cache and displays it in the imageview. The effect is as follows: Main

Li huaming himiOriginal, reprinted must be explicitly noted:Reprinted from[Heimi gamedev block]Link: http://www.himigame.com/android-game/315.html     Many kids shoes say that after my code is run, clicking home or back will cause a program

During this time, I read some documents and summarized some methods for implementing the dialog box. In general, there are two principles: one is to use the dialog class, the second is to apply the dialog topic to the activity to achieve the dialog

Sometimes this happens when Google code downloads the source code and learns. One project contains another project. It is equivalent to a reference of a jar package. But it is not a jar package, but a package. I found this method on the

The first two articles briefly describe the method for parsing XML by using Sax to implement the parsing function. The following uses Sax to create an XML file. The specific method of using Sax to create XML is to add relevant comments to the

When writing the parsing code, I found that I did not have a solid grasp of this aspect. The problem is that, in an element, " ", the data in it is always not available. After testing, we found that, PublicVoidCharacters (Char[]

1. Rotating Images Bitmap bitmaporg = bitmapfactory. decoderesource (this. getcontext (). getresources (), R. drawable. moon); matrix = new matrix (); matrix. postrotate (-90); // Rotation Angle bitmap resizedbitmap = bitmap. createbitmap (bitmaporg,

Recently, when the android listview loads data in the Multi-choice mode, the data obtained by the getcheckitemids () method of listview is inaccurate. When you select one of the items, then, when you cancel the listitem, getcheckitemids () can still