Android

How to obtain the phone number of the Local Machine on Android? Currently, an API is provided on Android to read the fixed number on the early SIM card, CopyCodeThe Code is as follows: Private string getphonenumber (){ Telephonymanager

We know that the Android mobile phone operating system uses the Linux kernel, and the highest system permission in Linux is Root, which is similar to the Administrator privilege in Windows, that is, the highest privilege in the operating system.

MainActivity is as follows: Copy codeThe Code is as follows: package cn. testnbackpressed; Import android. OS. Bundle; Import android. view. KeyEvent; Import android. app. Activity; /** * Demo description: * Process the Back key press event * *

This article mainly explains how to use Matrix in android to control the rotation, scaling, and movement of images. For details, refer to the Code: Copy codeThe Code is as follows :/** * Use a matrix to control image movement, scaling, and Rotation *

Dip: device independent pixels (device independent pixel ). different devices have different display effects, which are related to the hardware of the device. We recommend that you use this function to support WVGA, HVGA, and QVGA without pixels. Px:

Functional requirements: (1) For example, 2X2 is displayed on each page, 2XN in total, and image + text is displayed on each item (click a link ). If a single row is horizontally rolled, you can use Horizontalscrollview. For multi-row horizontal

You can use this statement 100 times: the adapter is used to bind data to each display control on the entry interface.--------------------------------- Split line -------------------------------------1. The getview () method encountered an exception

JSONObject and JSONArray to build json textCode // Assume that you want to create such a json text//{// "Phone": ["12345678", "87654321"], // Array// "Name": "yuanzhifei89", // string// "Age": 100, // Value// "Address": {"country": "china",

When the Image Library plays a slide, press the power key to disable the screen and then highlight the screen. The slides continue to play and no keyguard is displayed. How to display the unlock page after the screen is highlighted. The

Understanding LogoffLogoff is a tool used to add a MessageQueue to a thread and wait cyclically. When there is a message, it will arouse the thread to process the message until the thread ends. Normally, logoff is not used, because for system

First, understand the two words OnTouchEvent: triggers a touch event OnInterceptTouchEvent: triggers the interception touch event View Source Code and class inheritance relationships OnInterceptTouchEvent: A method defined in ViewGroup. This event

Public class ServiceList extends Activity {@ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); TextView TV = new TextView (this );ActivityManager activityManger = (ActivityManager) getSystemService

1. DatePicker inherits from the FrameLayout class. The date Selection Control provides users with date data including year, month, and day, and allows users to modify the data. To capture Data Events in the user's date Selection control, you need to

A Real-time folder is a desktop component used to display data information provided by a ContentProvider. To create a real-time folder, you must have two support options. On the one hand, you need to define an Activity for creating real-time folders.

Android shortcuts are the most basic components on the desktop. It is used to directly start a component of an application. In general, you can create a shortcut to change an application on the left side of the Launcher Application List by

Use XML to define Tween Animation The XML file of the animation is in the res/anim directory of the project. This file must contain a root element, you can set interpolation element or add all the above elements to the element group. By default,

Copy codeThe Code is as follows: ConnectivityManager mConnectivity = (ConnectivityManager) getSystemService (Context. CONNECTIVITY_SERVICE ); TelephonyManager mTelephony = (TelephonyManager) this. getSystemService (TELEPHONY_SERVICE ); // Check the

Android: theme = "@ android: style/Theme. Dialog": the Activity is displayed in the Dialog box mode. Android: theme = "@ android: style/Theme. NoTitleBar": The application title bar is not displayed. Android: theme = "@ android: style/Theme.

During development, sometimes the icon is slightly larger. For example, when it is 48 × 48, the text will be superimposed with the icon. The solution is as follows: Copy codeThe Code is as follows: TabWidget tw = tabHost. getTabWidget (); For (int

I have learned a lot about zxing recently. We recommend that you read it. There is a BeepManager class to implement the implementation of a beep sound and vibration. Let's take a look at how he did it: Beiming 1. Prepare an audio file such as beep.