Android enables mp3 player to play music.
Intent it = new Intent (Intent. ACTION_VIEW );
Uri uri = Uri. parse ("file: // sdcard/song.mp3 ");
It. setDataAndType (uri, "audio/mp3 ");
StartActivity (it );
Uri uri = Uri. withAppendedPath
I wanted to write this article, but yesterday I talked to a friend in the group about how libgdx displays Chinese characters. I have not noticed this problem before and found it to be quite serious. If it does not support Chinese, libgdx would be a
First, we recommend that you use a software package, such as Windows cmd.exe, to facilitate copying and pasting. Download: powerdemo.zip
To use Google maps during Android development, you must apply for an apiKey.
Procedure:
1. Get your debug
Generally, mobile phones with Android systems are equipped with GPS devices. Android provides a good interface for us to obtain GPS data. This article describes how to use Android to obtain the longitude and latitude of GPS.
1. inherit a class
Android dvm process and Linux Process, whether the application process is the same concept
DVM refers to the Virtual Machine of dalivk. Every Android application runs in its own process and has an independent Dalvik Virtual Machine instance. Every
In the previous blog, I wrote a program to directly operate the built-in storage of the mobile phone. This time, I went on to operate the files on the SD card under the previous blog protocol. Different from built-in storage, You need to grant
There are three types of menus for Android: Option Menu, Context Menu, and Sub Menu)
I. option menu
When you click the Menu button on the device, the Menu that triggers the event is the option Menu. There are up to six option menus. If there
In development, we need to bind some data to the desktop. This requires AdapterView. AdapterView is a subclass of ViewGroup. It determines how to bind a view to a special data type through the Adapter. AdapterView is very helpful when you display
The previous articles introduced the usage of some basic classes in the libgdx framework, and also included some of the source code. But if libgdx is used for actual development?
It is not enough to understand several classes. You also need to
Unit Tests can ensure the quality of our applications. Generally, after the business layer is developed, we test the business layer to ensure that no bugs occur at the business layer, after the business layer is passed, the control layer can call
Multiple page Switches
The assignment left by the teacher today is as follows: button switching, button switching, and touch switching.
First, let's talk about the logic of the first method:
First run the Code:
OneActivity. java file code:
TextViewAttribute settingsAndroid: layout_width = "fill_parent" Android: layout_height = "wrap_content" Android: id = "@ + id/autotx"Note: The parameter of the setText () or setTextColor () method is an int value or a resource address.Android:
For example, if an API of a higher version is discarded from an API of a lower version, the program will crash if the API of a lower version is used for development. The solution is as follows:
General structure:
Assume that the SDK version
I just saw an Android interview question: if you use a browser to open the webpage.All the explanations on the Internet are simple. Actually, they are very simple. You can set intent. However, here we will explain some additional knowledge.Check the
In this section, we will discuss the fifth topic, which is actually about data storage in Android. Let's take a look at the Common Data Storage Methods: file storage and database storage are common methods, and these storage methods are also
Let's take a look
How about it?
Let's analyze how this effect can be achieved?
First of all, we should note that the top several horizontal switchover functions are TabHost.
TabHost has been released successfully
Provides a window view
Today, we will record data storage's part2 and discuss the following topics about File and SQLite. We know that before the emergence of a relational database, everyone is used to using files to store data. Later, there was a database that was able
This article is followed by the previous article:
Configuration changeIf the Configuration of the device (defined as the Resources. Configuration class) is changed, all displayed user interfaces must be updated to adapt to the new Configuration.
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