android dropbox download file example

Problems encountered:1.java.io.ioexception:open failed:einval (Invalid argument) exception, the SD card in the emulator creates folder and file times wrongThe cause of the error could be: (1) The file name contains non-conforming characters, such as ":", "? "or spaces, and so on. (2) You need to create a folder directory before creating the file, you cannot creat

Run () { Destory = false; state = true; Bufferedinputstream bis = null; Randomaccessfile fos = null; byte[] buf = new Byte[buffer_size]; URLConnection con = null; try {con = url.openconnection (); Con.setallowuserinteraction (TRUE); Set the starting point for the current thread download, end Con.setrequestproperty ("Range", "bytes=" + startposition + "-" + endposition); Con.setrequestproperty ("Accept", "*/

The example in this article describes the method of sharedpreferences file storage operations in Android programming. Share to everyone for your reference. The specific analysis is as follows: The Sharedpreferences class provides a simple file storage function, like a program's configuration

This article illustrates the saving and reading function of the Android implementation file. Share to everyone for your reference, specific as follows: Note: There are Getfiledir () and Getcachedir () in the activity; method to obtain the current package file path from the current phone's storage space Getfiledir ()-----/data/data/cn.xxx.xxx (current package)/f

This example describes the usage of resource files in Android. Share to everyone for your reference, specific as follows: Use of resource files between XML files Reference format: Attribute= "@[packagename:]resourcetype/resourceidentifier" Example There are Strings.xml, Color.xml, dimen.xml files, using the parameters in them Ii. r

The example in this article describes how Android uses a vcard file. Share to everyone for your reference, specific as follows: FileOutputStream OS = null; try {os = VCardTest.this.openFileOutput ("android.vcf", mode_private);} catch (FileNotFoundException E1) {//TODO Au To-generated Catch block E1.printstacktrace (); } OutputStreamWriter writer; try {wri

combination with the example above, the Activity gets the focus when it enters the CustomViewActivity. At this time, the Activity will request the system to draw its layout, this request is processed using the Android framework, provided that CustomViewActivity must provide the root node of the layout, from CustomViewActivity. java shows that this Activity provides R. layout. customview_layout, and the roo

An example of this article describes the Android programming method for file read and write on SD card. Share to everyone for your reference, specific as follows: A lot of knowledge can be extrapolate only after you have a real understanding of mastery. Java in the file operation and the

Unlike liblog. So, Android does not directly open libsqlite. So for external use. Although Android provides a Java interface for accessing SQLite, you need to access SQLite using C language in ndk.There are two methods: First, use the source code sqlite3.h and sqlite3.c.Download the SQLite. Git library from the android source code website, find the two files,

In this example, you can use the sharedpreferences storage and custom file storage methods provided by the Android platform. 1. Follow the following configuration and the method described in step-by-step instance 1 to create the base of the entire project:Project name: examplethreePlatform: android2.0;Application name: examplethreePackage name: COM. ExampleActivi

When we back up a mobile phone contact and export it to the SD card, a vcf file is generated in the SD card to save the contact name and mobile phone number.The vCard specification allows the public exchange of Personal Data Interchange PDI information, which can be found in traditional paper business cards. Define the format of an electronic business card (or vCard.Third-party packages must be used to use vcard on Android:Copy it to the project and A

Development of the application will have some may become a value, such as WebService address application of some IDs, etc., has been directly in the application of the code, not forget the point that, then think of the properties can be used configuration file, I put the URL and other variables configured in the configuration file, After that, you can change the configuration