20172328 "Program design and data Structure" experiment four Android programming reportProgram: Program design and data structureClass: 1723Name: Li XinyuStudy No.: 20172328Lab Teacher: Wang Zhiqiang teacherDate of experiment: June 1, 2018Compulsory Elective: compulsoryFirst, the contents of the experiment
Experimental 1:android stuidio installation test
This example describes the Android Simple button event response synthesis hint control toast application. Share to everyone for your reference, specific as follows:
We've talked about defining a button object in Main.xml, and here we'll learn how button implements the event response.
Event handling that is triggered by button buttons, we call the event Handle, except that in Android, button events are con
This article describes the Android programming approach to developing audio recordings and playback recordings. Share to everyone for your reference, specific as follows:
* * The application needs to have the permission to write to external storage * If the output file is written to the E Xternal storage, and also the * permission to record audio. These permissions must is set in the * application ' s
Android programming tips (continuous)First: Intent jump is generally used for Activity class, but if you want to jump in a non-activity class, the solution is to add mContext before startActivity (intent), that is, context, and finally mContext. startActivity (intent); in other words, all methods that call activity in non-activity classes will do this in the future. If not, do the following: (Activity) mCon
What if the Android application accesses files on the Android root file system and cannot access the files due to permission restrictions on the application?
At this point, we need to use NDK programming, access to the system files with the C + + code, and build the local library for Java code in Android, so that you
java:09-26 10:58:50.013 23934-23934/com.jinwei.jnitesthello I/system .out:java.lang . Illegalargumentexception:thrown from C code From the output we see the C code used: (*ENV)->thrownew (env, NEWEXCCLS, "thrown from C code"), this line of code ran out of the exception. The exception handler in Java then prints the stack's information.Tool functionsIt is classic to throw exceptions in JNI: Find the Exception class and call Thrownew to throw it; So, you can write a tool function.voidJN
Summary of Socket communication in Android Network Programming
Create a server:1. Specify a port to instantiate a ServerSocket
2. Call the accept method of ServerSocket to wait for blocking during connection.
3. Obtain the underlying Socket stream for read/write operations.
4. encapsulate data into a stream
5. Read and Write the Socket
6. Close the stream.
To create a client:
1. instantiate the Socket throu
This article describes the Android programming implementation of the hidden status bar and testing activity is the method. Share to everyone for your reference, specific as follows:
First, hide the status bar
The method is as follows: In the program add//remove title of that part of the code can be achieved.
Package cn.edu.pku;
Import android.app.Activity;
Import Android.os.Bundle;
Import Android.
Android Network Programming: obtaining the Json and androidjson on the network
Android Network Programming to get the Json on the network
Please respect others' labor achievements, and repost the Source: Android Network Programming
First, IntroductionConnected to an "Android combat"----based on retrofit implementation of multi-image/file, text upload has said very much want to understand why retrofit so dick. Recently also read some of its source code analysis of the article and personally view the source code, found that the Java Network Programming and HTTP authoritative guidelines have a good interpretation. All along, have embrace
: Network Disk Download"Android game programming from scratch" is a systematic explanation of the development of Android games, starting from the most basic part, so that zero-based Android beginners can quickly learn and master the development of Android games. "
: Network Disk Download"Android game programming from scratch" is a systematic explanation of the development of Android games, starting from the most basic part, so that zero-based Android beginners can quickly learn and master the development of Android games. "
The menu of the Android mobile phone is elegant and elegant, and its programming implementation is concise and bright. If anyone has used QT interface programming, then the android menu programming will smile immediately,
Option menu:Take a look at the following code:
Impor
One, the study of programming language
There are many programming languages available in Android application development, so you should focus on the following programming languages.
①c/c++ language. C language is a kind of structured language. It is clear in level, easy to arrange the program according to Modulariz
This example describes the gravity-inductive usage of Android programming. Share to everyone for your reference, specific as follows:
Gravity sensors rely mainly on the mobile phone's accelerometer (accelerometer) to achieve
There are eight sensors in the development of Android, but not every real machine supports these sensors. Because many functional users ar
After studying Android for a period of time, I looked back at socket programming in Android today and found that socket programming is not very difficult. I sorted out socket programming in Android and provided our general socket
" #import "hello/hello.h "//Gomobile Bind generated header file in hello.framework @interface viewcontroller () @end @implementation Viewcontroller @synthesize textlabel;-( void ) Loadview {[super Loadview]; Textlabel.text = gohellogreetings (@ "IOS and Gopher" );} @end
#import "hello/Hello.h" imports the framework file generated earlier and textLabel.text = GoHelloGreetings(@"iOS and Gopher"); calls the function it exposes to set a label variable. It’s possible to
This article describes the implementation of Android programming to monitor battery status. Share to everyone for your reference, specific as follows:
Recently in the development of a GPS-related project, because it involves the use of GPs, it is well known that GPS is quite power consumption, so think how to know the current electricity, and when the electricity reaches a lower limit, timely reminder to t
The example in this article describes the approach of Android programming to implement Aidl (cross process communication). Share to everyone for your reference, specific as follows:
I. Overview:
Cross-process communication (AIDL), which mainly implements data sharing between processes (applications).
Two. Implementation process:
1. Server-side implementation:
(1) directory structure, as shown below:
Code layout for Android programming (1)
Preface:
I am used to writing layout with XML and writing layout with code. I am afraid it will be very similar. But after all, sometimes we still need to use code to write the layout.Code layout has many similarities with XML layout, which can be used directly in most methods. Only a few methods do not have the same writing style. Next, I will introduce several commo
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