Differences between Android image resources drawable (hdpi, ldpi, mdpi)

In versions earlier than 2.1, there is only one drawable. In version 2.1, there are three types: drawable-mdpi, drawable-ldpi, and drawable-hdpi. These three types are mainly used to support multi-resolution. Differences between drawable-hdpi,

Android rounded border

[From]: http://iaiai.iteye.com/blog/1102958 To set border rounded corners, you can define an XML file in the drawable-mdpi directory: Java Code "1.0"Encoding ="UTF-8"?> Http://schemas.android.com/apk/res/android"> "#000000"/>

Parse JSON in Android

This is a common method in Java, the example is as follows, copied from: http://www.oschina.net/code/snippet_176897_7317   Package Com. Practice. JSON; Import Org. JSON. jsonarray; Import Org. JSON. jsonexception; Import Org. JSON.

[Android] obtain the unique identifier of an Android device | device ID | serial number | UUID

  How to obtain a sequence number that uniquely identifies each Android device? There are many answers to this question, but most of them are valid only in some cases. Based on tests: all devices can return a telephonymanager.

Android build Error

The 4.0 project that has been compiled and updated recently has been compiled well before. The following error occurs today: Target sharedlib: libwebcore (Out/Target/product/xxxx/obj/shared_libraries/libwebcore_intermediates/linked/Libwebcore. So)

) Android principle, one of the series of dynamic wallpapers

Source: LinuxCommunityAuthor: droidpioneer Livewallpaper, a dynamic wallpaper, is a 3D feature of Android. Users can choose to attach dynamic wallpaper on the desktop to rotate the desktop background of their mobile phones. Compared with static

[Android] the animation effect is displayed when you click the button to enter the next activity.

The animation effect is written in XML, In the onclicklistener of the button   @ Override public void onclick (view v) {animation hang_fall = animationutils. loadanimation (curriculum. this, R. anim. hang_fall); V. startanimation (hang_fall);

Effect of Android time zone settings on Time Display

In the date and time settings in setting of Android, You can manually set the current time zone of the mobile phone after the automatic retrieval check is removed. After setting, the mobile phone will automatically make a Time Offset ~ Then, the

Android battery power update-batteryservice

Batteryservice provides batteryservice information, voltage, temperature, and charging status. Batteryservice runs in system_process and is started during system initialization. In systemserver. Java, you can seeCode: Log. I (TAG ,"Starting

[Android] How should context be written?

If you want to bring up an alertdialog, write the followingCode Alertdialog. Builder Alert = new alertdialog. Builder (this); alert. settitle ("warning"); alert. setmessage ("wrong time! "); Alert. Show ();   The prototype of the constructor

Android Number matching bits Modification

In Android, the default number matching digits are 7 digits, that is, from the right to the left, if the two numbers have 7 digits that match, they are considered to be the same number, for example, "+ 86 1234567" and "01234567" are the same numbers.

Android core analysis

The maxleng Android series are displayed on csdn.ArticleIt's really good. Sort it out here and learn it slowly ~ Maxleng Column   1. design intent of Methodology Discussion 2. Concept Space of Methodology Discussion 3. Hardware form of

Android building system summary

From: http://blog.csdn.net/yili_xie/article/details/5004205 It took me a month to look at Android make. On the Internet, I always saw some prawns saying that I overviewed Android make in one day, I have to lament that the strength of the prawns and

Android toast bug

Toast is often used in actual use, and it is extremely invincible and convenient to use.CodeYou can do it. Toast. maketext (This, "Content to be displayed", Toast. length_short). Show (); If you only use this code, you will

Differences Between calendar and date in Android and how to eliminate the impact of Time Zone on date operations

Reproduced from: http://blog.liaoxiaoqi.com /? P = 492   There are three common date operations in Android: Date type Calendar type UNIX Timestamp Among them, Unix timestamps are the most convenient and flexible in computing,

Thoughts and attempts on optimizing the batch insertion speed of Android text messages

During the backup and restoration of text messages on Android, the short message recovery idea was initially considered very simple. The circular parsing file called the insert method of smsprovider to insert the short message into the database

Android: Use of perferences

Browse the package directories in the/data/directory of the mobile phone. You will often see a shared_prefs folder withPackage name_preferences. xmlFile. This file is the main character; This file is similar to the role of a configuration file and

Android: edittext restrict text input

The edittext control in the editing box of Android is often used in normal programming. Sometimes, some restrictions are added to the editing box. For example, you can only enter numbers and the maximum number of input texts, you cannot enter

Android user-agent

Mozilla/5.0 (Linux; U; Android 0.5; en-us) AppleWebKit/522 + (KHTML, like Gecko) Safari/419.3 Google Nexus Mozilla/5.0 (Linux; U; Android 2.2; en-us; Nexus One Build/FRF91) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile

Google has recovered android Code Acquisition

Google has recovered the android Code. For details, refer to the official website of android source. Http://source.android.com/source/index.html To check out a branch other than "master", specify it with-B: $ repo init -u

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