Android

Android can customize controls. Two custom controls have been recently exposed and can be reused later. Public class AutoCompleteEmailEdit extends AutoCompleteTextView {Private ArrayList candidateString = null;Private ArrayAdapter adapter =

Find two encryption algorithms, one MD5 encryption, which is applicable to password encryption, because this algorithm is irreversible; the other is RSA encryption, Which is reversible: 1. MD5 Encryption Import java. security. MessageDigest; Public

First, understand the api provided by android for traffic statistics. For Android traffic statistics, you can easily obtain the TrafficStats class added to Version 2.2. In fact, the TrafficStats class also reads the text of the file object system

There are two types of Android dialogs: PopupWindow and AlertDialog. Their differences are:The position of AlertDialog is fixed, while the position of PopupWindow can be random.AlertDialog is a non-blocking thread, while PopupWindow is a blocking

L Permission inmanifest: L Save web Page tosdcard: // Get file name String fileName = webView1.copyBackForwardList (). getCurrentItem () . GetTitle (); // Save file to sdcard WebView1.saveWebArchive ("/sdcard /" + Environment. DIRECTORY_DOWNLOADS +

I. Environment Construction1. Download the android SDK and ADT2. Open Eclipse, click Install New Software under Help, click add, and Install ADT through the pop-up interface. You can set the Name to the path where the Location is ADT (note: the path

The jump between androidactivities is not only for startActivity (Intent I), but also for startActivityForResult (Intent intent, int requestCode. The onActivityResult (int requestCode, int resultCode, Intent data) method can be used to obtain the

Intent intent = new Intent (Intent. ACTION_GET_CONTENT );Intent. addCategory (Intent. CATEGORY_OPENABLE );Intent. setType ("image /*");Intent. putExtra ("crop", "true ");Intent. putExtra ("aspectX", 1 );Intent. putExtra ("aspectY", 1 );Intent.

Step 1:First, build the dialing interface in the main. xml file under layout (we recommend that you use a tool to drag the interface because it is faster and you do not need to define something in other files)Main. xmlAndroid: layout_width =

A problem occurs when you use Gallery to display images. That is, the sliding speed is too fast. A few images are swiped each time. How can this problem be solved?1. Directly inherit Grallery, override the onFling method, and return the value false.[

Package ahu.edu; Import android. app. Activity;Import android. content. Intent;Import android. OS. Bundle;Import android. view. Menu;Import android. view. MenuItem;Import android. view. View;Import android. view. View. OnClickListener;Import android.

SensorMgr = (SensorManager) getSystemService (SENSOR_SERVICE );SensorEventListener lsn = new SensorEventListener (){ @ OverridePublic void onSensorChanged (SensorEvent e ){// TODO Auto-generated method stubX = (int) e. values [SensorManager. DATA_X];

By default, an activity occupies the entire screen. However, you can set a "dialog box" topic for an activity so that it can be displayed as a floating dialog box. For example, you may want to define your activity as a pop-up "dialog box" to notify

In addition to the "dialog box" progress bar, you can also create a dialog box that displays the "Operation progress", for example, displaying the download status.1. Create a project: Dialog. 2. Code in main. xml. Android: layout_width =

We already know that is used to define how your Activity is enabled by another Activity. This is the so-called "filter ". However, if two activities have the same , what will happen?The code in AndroidManifest. xml. Package = "net. horsttnann.

Color theme is the beautification package of emacs.: Http://www.nongnu.org/color-theme/Linux configuration method: copy the color-theme.el and themes folder in the compressed package to a folder, my is ~ /. Emacs. dAnd then open the configuration

A simple Android paging data loading instance automatically loads the next page of data by sliding to the bottom of the instance. Now, you can click and drag a custom control.The following is a major Activity code:01 public class MainActivity

The custom style of the Image Browsing gallery control is added with a gray border: 1. The main. xml file is as follows: [Java]Android: id = "@ + id/widget0"Android: layout_width = "fill_parent"Android: layout_height = "fill_parent">Android: id = "@

If (isConnect (this) = false ){New AlertDialog. Builder (This). SetTitle ("network error "). SetMessage ("Network connection failed, Confirm network connection "). SetPositiveButton ("OK ",New www.2cto.com DialogInterface. OnClickListener (){ @

Package gongzibai. co. cc; Import android. app. Activity;Import android. app. Dialog;Import android. OS. Bundle; Public class ProgressBarActivity extendsActivity {/** Called when the activity is first created .*/@ OverridePublic void onCreate