Android Study Notes (32)-code to set screen brightness

1. Currently, many applications provide day and night reading methods, that is, to mediate the brightness of the screen. It is actually very simple, just some simpleCodeYou can. 2. Implementation Process: // Screen brightness windowmanager.

Android address book is displayed by pinyin group and searched by pinyin

Similar effects: Import pinyin4j-2.5.0.jar, there is a way to convert Chinese characters into pinyin, so after obtaining the address book contact, the contact display_name into pinyin, the above layout is actually two layout, the layout is

Android Study Notes (18)-full screen activity settings

SeeCode 1. Add the following opportunity to the activity to hide the top titlebar on the screen. // Hide the titlebar, which reaches the full screen requestwindowfeature (window. feature_no_title); getwindow (). setflags (windowmanager.

Android error: token Android. App. localactivitymanager $ localactivityrecord is not valid

A tab is nested. This error is reported in the activity call progress dialog box of the tab in the lower layer. Troubleshooting has taken a lot of detours. The reason is the problem of passing in the context layer. Finally, we found a simple

Android learning notes (1)-menu operations

@ Overridepublic Boolean oncreateoptionsmenu (menu) {// todo auto-generated method stubmenu. add (0, 0, 0, "add memo"); menu. add (0, 1, 1, "delete all"); menu. add (0, 2, 2, "quit"); return Super. oncreateoptionsmenu (menu) ;}@ overridepublic

Android yuv2rgb Solution

In the previous project, we needed to decode the h264 video, use FFMPEG, and decode YUV. The best display method is to display the video through OpenGL ES 2.0, if OpenGL ES 2.0 is not used, yuv2rgb must be used to draw the image. I only know two

Android Study Notes (5)-getting file paths and file filtering

Note: development-based projects: learningflash code segments 1. Variable Declaration Private string mroot = ""; // root path private string [] filename; // used to store the file name private file [] mfiles; // used to store the obtained file int

Android development _ socket (2)

Socket programming 1. Basic Introduction Socket" Socket is also known as "socket". It is used to describe IP addresses and ports and is a communication chain handle. Applications usually send requests to or respond to network requirements through

Android learning notes (9)-click Settings in the upper and lower layers of framelayout.

1. hold_learningitem.xml In the preceding layout, several controls in framelayout are added, and Android: clickle = "true" is added to imageview to shield webview click functions.

My android advanced journey --> Android: Adding reflection 3D effects to gallery

After the previous Android gallery and gridview methods and imageswitcher implementation of two image browsers with preview and slide methods, I accidentally saw some introduction to gallery.I learned about the 3D effect example and now I will write

Android Study Notes (10)-usage of thread threads

For example, it is clear at a glance 1. Start a thread // Enable a thread to update data once per second. Public class timethread extends thread {@ overridepublic void run () {do {try {thread. sleep (1000); message MSG = new message (); MSG.

My android advanced tour --> Android asynchronously loads Image Display and caches Images

Step 1: Create a project dataasyncload, as shown in Step 2: Set the application UI A. Main. xml B. listview_item.xml Step 3: write some helper classes CN. roco. Data. utilsmd5.java package cn.roco.data.utils;import

My android advanced tour --> Android uses autocompletetextview to Display Search history prompts

Introduction Google or Baidu is often used when we access the internet. If we enter the information we want in the input box, other prompts related to it will appear, which is very convenient. This effect is implemented using autocompletetextview in

Android learning notes (16)-define your own toast

1. directly call the built-in toast Toast. maketext (context, "the alarm time you set is reached", Toast. length_long). Show (); But sometimes it cannot satisfy the style we want, so... 2. define your own toast Toast. xml To be used in the

Android developer _ modify information in listview

Use listview to list personal data or friend data during development   If one of the items is modified, it seems that the corresponding view cannot be found and updated. Of course, if   If you use textview + imageview instead of listview, this

Android Study Notes (26)-animation usage

Animation effects have been used to make a small application recently. The team members have already achieved the effects and can modify the effects. Principle: The animation looks like an image is moving, and several images are constantly switching.

Android system transplantation and debugging ---> how to modify the second-stage logo of Android device startup

1. Change location:/home/PYou/mx0831-0525/device/other/tbg1073 directory 2nd, replace robot.1024x600.png with the image name that you want to set. There are other images in the directory that do not have resolution. You can change the image as

Several important concepts that need to be understood before learning android

I. concept:Android is an open-source smartphone operating system based on the Linux platform. The system consists of the underlying Linux operating system, middleware and core applications. Android applications are written in powerful Java languages

Android 9 patch

The following are two reference articles! Note: Let's clarify these two different lines. The lines on the left and top define which pixels of the image can be copied during scaling.The bottom line and the right line are used to define an image in a

Android calls the system map (Google map) and displays the specific location

The Android app of "public comments" is positioned as Google map. When you click a merchant's address, the system automatically calls Google map and displays the merchant's location, how is this done? Intent intent = new intent (Android. content.

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