In the Android system, there are various storage methods, and SharedPreference is the simplest one.
SharedPreference is essentially an xml file, and its storage structure is a Map. The values in it are key-value pairs.
Such:
We can see that
Viewbadger In the Android message prompt class. The effect is as follows:
The Code is as follows:
BadgeView. java
Import android. content. context; import android. content. res. resources; import android. graphics. color; import android. graphics.
There are multiple ways to parse xml files in Android:Dom:
Highly versatile. It reads all the content of the XML file to the memory, and then allows you to use DOM APIs to traverse the XML tree and retrieve the required data, however, you need to
Late bone (http://blog.csdn.net/iamlazybone QQ: 124774397)
Flappy Bird
I'm not talking about this game.
Start learning directly (The Shanzhai is not nice)
Some time ago I saw several demos and used this game trainer.
Start!
Reporting
1. What is a touch event?
Currently, you can directly check Wikipedia and other professional documents. However, here is a popular example.
First, let's take a look at the following picture. Click the picture in the middle and the words "Click image"
When I started my work in the eighth day, I was very impressed.
Many things have taken place during the Lunar January holiday. It has a great impact on me.
I have been depressed for several days. Now, I have been resurrected in full blood. Is it so
How does Service Manager Start?
Why should we talk about Service Manager and mediaserver startup? Because we will talk about the Camera process later.
You will use related knowledge points. Considering the structure of the article and the reading
LocalBroadcastManager is a class in the V4 package. It is mainly responsible for registering and sending internal broadcasts. That is to say, it only applies to registering and sending broadcasts in the Code. It is not applicable to broadcast
1. Introduction to Monkey testing
Monkey testing is a means of automated testing on the Android platform. The Monkey program simulates the user's touch screen, sliding Trackball, buttons, and other operations to perform stress testing on the program
1. logcat: logcat can be used to record log information, which provides great convenience for debugging.1. Usage:(1) Use the command line adb logcat. Disadvantages: not intuitive.(2) Use the graphical tool logcat provided by the adt plug-in.2.
In tablet development, only the horizontal screen switching function is required, and the default activity of the system has the horizontal and vertical screen switching function. How can this problem be achieved?
In fact, it is very simple. You
In Android, sqlite is used. The most commonly used classes are SQLiteOpenHelper and SQLiteDatabased. The most commonly used operation is to create and open a database and operate on data. The longest operation is insert delete update and query.
A simple network packet capture Analysis Method for mobile phones:
1. Compile tcpdump
Download the source code from the official website of tcpdump and compile
Tcpdump Official Website: http://www.tcpdump.org/
2. Install tcpdump on your
Directly add the code.
In fact, it mainly uses the OnScrollListener inherited interface to determine whether the listview reaches the last one in the onScrollStateChanged method.
Load the data and the following code.
Public class MainActivity
public abstract void onUpgrade(SQLiteDatabase db,int oldVersion,int new Version)
This method needs to be rewritten during implementation.
The onUpgrade method is called when the database needs to be upgraded. It can be used to add or delete tables
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