First day:ADB command:ADB devices List of all devicesADB shell mounts to Linux space and can execute Linux commandsADB install xxx.apk If multiple devices adb install-s device nameADB push pushes files to the phoneADB pull pulled the file out of the
First, IntroductionThe java.io package contains almost all the required classes for operation input and output. All of these flow classes represent the input source and output destination.The streams in the Java.io package support many formats, such
java.io There are two abstract classes: InputStream and ReaderInputStream is a superclass of all classes that represent byte input streamsReader is an abstract class for reading stream of charactersThe InputStream provides a byte stream reading, not
Java reads and writes files in multiple ways.Multiple methods of reading files in java1. Read File Content in multiple ways.1. Read File Content by byte2. Read File Content by character3. Read File Content by row4. Randomly Read File Content*/Import
The Java.io package provides interfaces and classes to perform basic operations on files, including operations on file and directory attributes, operations on file reads and writes, and so on. the file object can represent files or directories. The
Use the buttons in the upper-right corner to export and import files from the simulator.
Program running result
After running, delete in the file browser is deleted.
FileHelper. java is a help class for files. It creates, deletes, and
Android saves bitmap to the specified path, androidbitmap
It's not hard, but sometimes it's hard to remember .. Record it.
Add permissions first
1
1 private void saveCroppedImage(Bitmap bmp) { 2 File file = new File("/sdcard/myFolder"); 3
TCP, UDP programming exercisesTCP☆ Upload text fileReads a local text file, sends the data to the server side, and stores the data. After the storage is complete, give the client a hint.first, the idea of solving problemsClient: (1) Create socket
Create and write files and content in java
The following content is completely original, if reproduced, please indicate from: http://www.cnblogs.com/XiOrang/
Two days ago, in the project, I tried to get a large json data (about KB) and save it by
Basic File class, file class
The role of the File class:The Java io package defines the File class for managing files or folders.The File class can only be used to indicate the information (attributes) of a File or folder and delete and create a
Ava.io There are two abstract classes: InputStream and ReaderInputStream is a superclass of all classes that represent byte input streamsReader is an abstract class for reading stream of charactersThe InputStream provides a byte stream reading, not
Posting with HttpClient, postinghttpclient
HttpClient is an Http Client that is frequently used in Java. It summarizes the post request usage frequently used in HttpClient4.
1 Basic Post
Use two parameters for post requests:
@Testpublic void
Java IO stream, java IO stream character
Refer stream: it also reads binary files, which will be decoded into characters that we can understand.Bytes stream = byte stream + Decoding(1) character input stream: Reader: It is the root class of the
Java decompress zip-multiple files (including folders)
Compress multiple files and folders to decompress complicated file directories.
The compression method uses variable parameters. one or more files can be compressed. Arrays can be written or
Android creates folders, generates files, and writes text files.
1. add permissions first
2. Create a folder, generate a file, and write the text file content code Private void initData (){String filePath = "/sdcard/Test /";String fileName =
Code snippets for android tips1. Call the phone number
Intent intent = new Intent(); intent.setAction(Intent.ACTION_CALL); intent.setData(Uri.parse("tel:"+number)); startActivity(intent);
2. What is the maximum text length of a text
Android learning notes-data Sdcard storage method and sdcard operation tool class, androidsdcard
(1) file directory
(2) Code of each file:
FileService. java is the tool class used to operate sdcard:
Package com. example.
The read () and read (byte [] B) methods exist as abstract methods in the abstract class inputstream. The latter is not. The JDK API describes the two methods as follows:
1: Read ():Reads the next byte of data from the input stream, and returns
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