Implementation:
Implementation Method:
The inherited View Class re-draws a circle by itself, adds the custom inherited View class to the current activity, and adds an ontouchlitener event to the custom view control.
Custom components inherit from the View class:
Package COM. jiahui. draw; import android. content. context; import android. graphics. canvas; impor
memory allocation/Recycle by yourself, so be careful.
In Android development, how can we effectively detect memory usage and Memory leakage?
Three methods are introduced here:
1. Program Log information
During garbage collection, the program prints a Log information logcat window. For example:
D/dalvikvm( 9050): GC_CONCURRENT freed 2049K, 65% free 3571K/9991K, external 4703K/5261K, paused 2ms+2ms
Note that the "3571 K/9991K" value in this messa
the searchsuggestauthority and androidmanifest. xml must correspond to each other,
The key sentence for importing an app to qsb is as follows:Android: searchsettingsdescription = "@ string/settings_description"Android: includeinglobalsearch = "true"
Compile and generate APK push. In Search setting, manually select your application options.
Under package/apps/quicksearchbox/tests/, there are three in
. Apps. Maps-1/Dev/block/dm-3 2.0 m 876.0 K 1.2 m 42%/mnt/ASEC/COM. Alibaba rasoftworks. Quadrant. UI. Advanced-1
Where/dev/block/dm-0 to 3 is the APK app we installed on SD. As you can see (I have installed four applications on SD)
4. This only installs applications on SD, but their buffered data or temporary data are still in the/data directory, but the installed files do not occupy the flash space, the d
This article was reproduced from: http://www.jb51.net/article/82281.htmThis article mainly describes the Android app call Mediarecorder implementation of the recording function instance, Mediarecorder is very powerful, not only can be used to record audio can also record video, the need for friends can refer to the nextMediarecorderAndroid Mediarecorder contains audio and video recording capabilities, and o
Android from hardware to application: Compile the hardware service at the APP testing framework layer (complete)
Create an Android Application Project: Use the Android plug-in ADT of Eclipse to create an Android project named Gpio. After the project is created, copy the proj
Create Android Application project: Create Android project using Eclipse's Android plugin ADT, project name Gpio, copy the project catalog to the packages/apps/folder after creation is complete, and delete the Gen folder under the project directory, without deleting the words will cause the class to repeat the error.Src/com
My classmates run javah com.cn. ndk22.Ndk22. Activity in the ndk22/bin/classes project. The. h file appears.
I am in the bin/classes directory and cannot access it,
: Error: unable to access android. app. Activity
Android. app. Activity not found
As shown in
So I went to the ndk/src directory in cmd and ran j
Finally:
Implement the SD card file browser
Technical analysis:
The main controls used:Listview
How to fill in the listview control, you need to traverse all the files under the entire SD card. If you traverse a folder, first obtain all the files under the folder, then we can fill all the files in this listview, so we can repeat it.
How can I get the modification date of a folder or file?
The file class in Java only provides us with a public long lastmodified (): The long value of the last modi
Http://www.ard9.com/gsjj/204.htmlFor the Android platform, the size of the icon at different resolutions have different requirements, for the current mainstream hdpi that WVGA level, usually hdpi app icon size is 72x72, and the standard mdpi that HVGA is 48x48, For the current HTC and Motorola introduced some of the QVGA used by ldpi, icon for 32x32For the
Android Tutorial is about to startSay this opened the blog, has been trying their own app, found that the TM is really uncomfortable, not easy to use, well, it was intended to give up, but see the phone there is another pit, simply re-do a bar.The original God Reply app address http://app.sohu.com/app/info?app_id=24203
More and more developers are keen to use Html5+javascript to develop mobile web apps. However, whether the advent of HTML5 Web apps will replace mobile applications in the future is still unknown. On the one hand, users in the use of habits, do not like to enter complex URLs on the browser, on the other hand, HTML5 Web App stored on the server side, in each use of the need for data transfer, resulting in a waste of traffic. Some developers do not want
Chapter 2 use C # To compile the Baidu map Android mobile app (Lecture 1 ),
Category: C #, Android; date:3.5 Example 5 -- Multi-map presentation I. Introduction
Map controls start with v2.3.5 and support multiple instances. That is, developers can create multiple map objects on a single page and operate on these objects without interfering with each other.
File N
1. Bloggers ' DailySay a long time did not update the blog, the words disappeared for a long period, say ... Your sister's, can not be so two.Well, say ... What the hell is going on, I'm not really%¥¥%* 0 ... Well, yes, that's what it's all about.One day I turn on the phone (your sister, not every day in the mobile phone), specifically to open a category folder, found inside their own before a lot of pits (in fact, they have been to do the app, but al
This article introduces some of the relevant knowledge of Android app startup, including app startup, app startup and App startup optimization!
App application startup mode
1. Cold start
When the application is started, the bac
Android issue highlights forty-seven: Error: Execution failed for task #39;: app: packageRelease #39;.) Unable to compute hash
The jna-related warnings are listed above when you encounter this problem during obfuscation compiling when using the jna jar package.You need to develop compilation rules in the proguard-rules.pro to ignore the jna-related package warnings.
-keep class com.sun.jna.** { *; }-dontw
Use Android-Debug-Database to view the App Database in the browser.
Usage reference:Http://www.jianshu.com/p/89ccae3e590bSource Code address:Https://github.com/amitshekhariitbhu/Android-Debug-DatabaseFeatures:
Add dependency:Add the following code in your build. gradle:1 debugCompile 'com. amitshekhar.
hijacking domain name IP mappings vi/etc/hosts192.168.0.105 m.ai9475.com In this way, the server's DNS hijacking is basically configured , the next step is to set up the DNS corresponding IP on the phone,
Open Network settings, Wi-Fi connection, modify network, advanced, static IP mode, modify the first NS IP, the second available normal public network DNS
Such as:Last Note: After you modify the hosts, you need to restart the DNSMASQ
Android reinforcement-2. Learn to crack the app before reinforcement and debug the program for modifying the memory value,
[All Rights Reserved. For more information, see the source .]
Because the company's project requires app reinforcement, after several months of research, I have achieved a complete set of third-party reinforcement solutions such as love encry
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