android canvas example

This article realizes the scaling effect of the images in Android First design layout: The logical code is as follows: public class Mainactivity extends activity {private ImageView iv1; Private ImageView Iv2; @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (R.layout.activity_main); Iv1 = (ImageView) Findviewbyid (r.id.iv_1); Iv2 = (ImageView) Fi

This example introduces TabActivity. In the new Android version, TabActivity is not recommended, but Fragment. TabActivity provides a Tab Control. The key class is TabHost and TabHost is the View of TabActivity. You can use getTabHost () to obtain the TabHost corresponding to TabActivity. You can use TabHost. tabSpec is used to add a page to the Tab window. TabSpec is used to describe a page (Tab). Each Tab

In this example, Light Theme and Default Theme are the same in code and resource. Both use layout of R. Layout. controls_1. The difference between Controls1.java and Controls2.java is only in the class name. Controls_1.xml defines the following types of UI controls: Button, EditText, CheckBox, RadioButton, ToggleButton, Spinner, and TextView. Here we mention RadioButton. RadioButton is a single-choice button. You need to define a group for a group of

Android boot example Program Android boot sample program. The broadcast method is used for acceptance, and the Android built-in storage SharedPreferences is used to store the auto-Start Settings of startup. Source code: Click1. add permissions first 2. register the expected broadcast receiver (if you want to s

This example describes the basic usage of the Android Autocompletetextview control. Share to everyone for your reference, specific as follows: When the input part of the content will have related suggestions, similar to the Baidu hint information 1. Declare a autocompletetextview in the layout file 2, the definition of a hint entry style, in the layout directory to establish list_item.xml fi

This example describes the Android view refresh mechanism. Share to everyone for your reference, specific as follows: I. GENERAL description In Android's layout system, the parent view is responsible for refreshing, layout, and displaying child view, and when the child view needs to be refreshed, notify the parent view to complete. Second, code Analysis 1). ViewGroup AddView method to understand the mea

Custom view can probably be divided into: Inherit view Combination View own picture (with paint and canvas) Custom ViewGroup (widget) Recently chatted with schoolmate, then prepares oneself realizes a ImageButton to practice practicing. (simplest) and a subsequent case of combining ImageView with TextView. ImageButtonthe easiest way to realize ImageButton is to put the button and ImageView together. Well, it's easy for people to

The simplest example of mobile terminal based on FFmpeg attachment: built-in Android player, ffmpegandroidPrevious articles record FFmpeg-based multimedia programs on the Android platform. For comparison, this article records a Video Player Based on the android Multimedia Framework OpenCore.The use of multimedia framew

This example introduces the usage of RatingBar. RatingBar is a subclass of SeekBar and ProgressBar. It uses pentagram to show the same score. By default, RatingBar users can change the score value by using the direction keys or touch/drag. ratingBarStyleSmall and ratingBarStyleLarge of the other two styles generally do not support user interaction and are used to display the score result. SetNumStarts can set the number of five-pointed stars in the co

Android slide menu complete example (domestic version)MainActivity is as follows: Package cc. cd; import android. OS. bundle; import android. view. view; import android. view. view. onClickListener; import android. widget. adapter

Previous: http://www.bkjia.com/kf/201208/149607.html Android: layoutAnimation attributes are defined in ViewGroup. Therefore, all ViewGroup subclasses can define android: layoutAnimation. ViewGroup can be nested, so that layout animation can also be nested. In this example, TableLayout (subclass of ViewGroup) is used, and its sub-View TableRow (also subclass of V

This example is similar to the above column, but introduces the use of android: layout_column = "1" to specify the sequence number of the column to be added, skipping the first column: Android: layout_width = "match_parent"Android: layout_height = "match_parent"Android: stre

the Surfaceview class in Android is a double buffering mechanism. Therefore, in the development of the Android game should try to use Surfaceview rather than view, so the efficiency is high , and Surfaceview function is also more perfect. To make it easier to understand double buffering, here's how to implement double buffering with view. In this need to explain, the core of double buffering technology is

(savedinstancestate); Setcontentview (r.layout.activity_drawer); Mdrawerlayout = (drawerlayout) Findviewbyid (r.id.drawer_layout); Button button = (button) Findviewbyid (R.ID.BTN); Button.setonclicklistener (New Onclicklistener () { @Override public void OnClick (View v) { //Button Press, turn the drawer open mdrawerlayout.opendrawer (gravity.left);}} ) Using toolbar + Drawerlayout to quickly achieve a high and large menu sid

The example in this article describes how Android sends mail. Share to everyone for your reference, specific as follows: The ability to send mail in Android phones is also essential. How do you implement it? The following is illustrated in a simple example. The procedure is as follows: Import Java.util.regex.Mat

Previous: http://www.bkjia.com/kf/201208/148369.htmlImageView can display an image, which supports reading images (such as resource files or Content providers) from multiple data sources and managing the image size to adapt to different Layout managers, allows you to scale and arrange images. In this example, the layout file and ImageView attributes are used to set the ImageView attributes: Non-scaled view No zoom display

Android SQLite database usage example For a brief introduction, mainstream mobile devices such as Android and iPhone all use SQLite as the storage engine for complex data. When we develop applications for mobile devices, we may need to use SQLite to store a large amount of data, so we need to master the SQLite development skills on mobile devices. For the

This article describes the Android API based TABS3 to achieve the tabhost effect. Share to everyone for your reference, specific as follows: Two days ago, the teacher let himself write a video player client, this is his lectures on a small demo, by looking at the TABS3 of the Android API to achieve the tabhost effect of imitation cool video client. My API path is the TABS3 under D:\

Android App Digital Lock Recently took time to do the following digital unlock function, the phone has digital unlock, app can also do, to avoid some of the application of privacy leakage, is to achieve the effect of the map: Preface: These two days the boss gave a task, said is to do a copy of iOS Digital lock screen interface, thought that this thing online should have quite a lot of, and then the first Baidu A, who knows the case seems to be

For the AIDL introduction and implementation steps, refer: Http://www.cnblogs.com/hibraincol/archive/2011/09/06/2169325.html This article uses an example to analyze the implementation of AIDL. In this example, the AIDL client obtains the webPage information provided by the AIDL server through the AIDL interface. The following describes the implementation steps of AIDL communication: I. Write server code 1.