Android Learning (1)

1. android Development History.2. Build an android development environment. 2.1 java sdk (andriod sdk)> eclipse> adt 2.2 create an android simulator. 2.3 set environment variables. (Android_sdk_home) 3. Create an android Application. 3.1 start the

How does Android allow apps to handle power key M on their own?

   The Power key is usually not obtained by the framework app. 1: Modify the interceptKeyBeforeQueueing method of phoneWindowManager. java, and add the following code after the reference line. Case KeyEvent. KEYCODE_POWER: {// reference line

Do you need to leave the dumplings? -View application development details in small cases

--- Update Do you need to leave the dumplings? It depends on whether you like to eat dumplings with dumplings. Don't believe it. The elders like it! However, I have only heard of three or five digits. Then, do you like dumplings, If

The status of the Android View and the re-drawing process analysis give you a step-by-step insight into the View (3)

Reprinted please indicate the source: http://blog.csdn.net/guolin_blog/article/details/17045157 In the previous article, I analyzed the view rendering process from the source code layer, I have learned how the onMeasure, onLayout, and onDraw steps

In-depth introduction-Android system migration and platform development (I)-download and compile Android4.0

Author: Instructor Tang,Hua Qing vision embedded college lecturer. 1. Download and compile the Android4.0 System Android system download and compilation, Google's official website has given a detailed description, please refer to the Android

Windows, WindowManager and Window management for Android

This is a small piece of information on the content of the floating window studied two days ago. First of all is reprinted an introduction to the Android window content, I think write well: http://blog.csdn.net/xieqibao/article/details/6567814 To

Android Phonebook: Contact UI loading and contact storage process (2)

17:18:29 1. in Phonebook, the UI for creating/editing contacts is not written in xml files. It loads different UIS as the Account type changes, such as SIM contacts, with only Name and Phone Number, if it is USIM, there may be a second number or

Android returns to the previous Activity

The principle is to use intent to jump and end the activity after the jump: For example, returned from ReplyActivity to ListViewActivity: /*** Return to inquiry * @ author wangfeng * @ date 10:17:09 **/private final class cacelBtnClickListener

Use Random to generate Random numbers in Android

MainActivity is as follows: Package cc. test; import java. util. hashSet; import java. util. random; import android. app. activity; import android. OS. bundle;/***** Demo Description: * use Random to generate Random numbers in Java ** references: * 1

Android hexadecimal conversion to Chinese (solves the garbled problem)

Today, in the project, we want to convert the hexadecimal string into Chinese characters, but the conversion is garbled. Later, we put the Conversion Function in the java project to perform normal conversion, in general, the first thought of garbled

Select a photo from the album/take a photo under andorid and cut it

In Android programming, selecting a photo album or taking a photo and then cutting it requires a lot In the previous article, I only talked about how to get a photo from the album. Today I want to talk about how to cut the obtained photo. Download

Conversion between Bitmap and base64 in android

/** Convert bitmap to a base64 byte array */public byte [] Bitmap2Base64 (Bitmap bitmap) {try {// first convert bitmap to a common byte array ByteArrayOutputStream out = new ByteArrayOutputStream (); bitmap. compress (Bitmap. compressFormat. JPEG, 10

Android input subsystem

Linux input subsystem review 1: Why should I review the linux input subsystem? This problem will be known later. 1. the device of the linux input subsystem is based on the platform device mechanism. Therefore, let's first review the platform device

Floating windows for Android

Yesterday I studied the suspended windows of Android and encountered a problem. After studying it for a day, I finally found the knot. The reason is very poor ..... The problem is that I want to display the floating window on the desktop or other

Android sliding to the right returns

In ios7, almost all of Apple's Original Ecological Applications can slide to the right to return to the previous page, this prevents users from clicking the remote return key with a thumbs up when performing single-handed operations (the iPhone 5

View working principle (4) view layout Process

Just now, I want to start a new year and wish myself a smooth sailing in the new year. At the same time, I wish all my friends a new year and a great harvest!I. Overview of the layout process of the view in android Layout The view layout process is

An exception occurred when running the program after Android obfuscation: Missing type parameter

Obfuscation of programs, package and release the apk, and then test the apk with a real machine. It is found that all pages with network requests cannot display data and view logs, the following exceptions are found: VcD4KPHA + zfjJz7Lpwcuy6Q

Improving android Performance Tools [zipalign]

What is Zipalign? Zipalign is a tool for organizing APK files on the android platform. It was first introduced in the SDK software development kit of Android 1.6. It can optimize the packaged Android Application to make the interaction between the

Android Address Book Development-get the first letter for simple search

Android Address Book Development-get the first letter for simple search December 27, 2013 development log At present, the internship Company of Tom is responsible for the development of a project. Although it was claimed, it was my turn after the

Analysis of three sizes and three variants in Android Camera Development (contributing one self-adaption Picturesize and Previewsiz

I often hear people ask about various deformation issues in Camera development. I will summarize them here when I am free. Three dimensions: 1. Surfaceview size Surfaceview is used to preview Camera. When it is full Screen, it is the Screen size. 2.

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