how to transfer data between android phones

Parsing android JSON Data Format 1. JSON (JavaScript Object Notation) is a simple data format, which is lighter than xml.Json is constructed in two structures: the last plus a format that is rarely displayed at the end of the article1. A collection of name/value pairs ). In different languages, it is understood as an object, record, struct, dictionary, and hash t

JSON string to a JSON objectJsonobj = new Jsonobject (JSONSTR);Gets the value object for the specified JSON key objectJsonarray personlist = Jsonobj.getjsonarray ("persons");Traverse Jsonarrayfor (int i = 0; i {Get each JSON objectJsonobject Jsonitem = Personlist.getjsonobject (i);Get the value of each JSON objectperson person = new person ();Person.setid (Jsonitem.getint ("id"));Person.setname (jsonitem.getstring ("name"));Person.setaddress (jsonitem.getstring ("Address"));List.add (person);}}

Android JSON Data Format Parsing, androidjson 1. JSON (JavaScript Object Notation) is a simple data format, which is lighter than xml.Json is constructed in two structures: the last plus a format that is rarely displayed at the end of the article1. A collection of name/value pairs ). In different languages, it is understood as an object, record, struct, dictionar

In practical applications we often need to interact with and save the data, but the default method in intent has a type limit on the transmission of data, when we need to transfer or save a complex generic data, the use of application is a good solution.As the name implies, application corresponds to the entire applica

In practical applications we often need to interact with and save the data, but the default method in intent has a type limit on the transmission of data, when we need to transfer or save a complex generic data, the use of application is a good solution. as the name implies, application corresponds to the entire applic

If there is a direct relationship between the pages, such as activity and the fragment within it, you can pass the data directly through the invocation of the interface. Advantages: direct, convenient. Disadvantage: High Code coupling If it is two activity between the data transfer, there is the process of interface switching, you can use StartActivityor Start

As we all know, startactivity () is used to switch the jump activity, if you want to book data in another activity, you only need to use the Intent.putextra () method in the source activity to get out of the data, It's okay to use the Intent.get**extra () method to receive data in the corresponding activity.So Startactivityforresult () method, it is also used to

One of the biggest disadvantages of the Android system is power. Here we will optimize the download to save power as much as possible. 1. Transfer Data together as much as possible. Unlimited read of cache data will also increase power consumption. Generally, retrieving data

JSON is an XML-like common data Interchange Format, which has higher transfer efficiency than XML; This article will introduce two methods to parse JSON data, the need for friends can refer to JSON is a common XML-like data Interchange format, with higher efficiency than XML.Structurally, all

program, you can pass the parameters, that is, using intent Putextra () value, or bulk with bundles, such as the transfer of "a startup application" see http://www.2cto.com/kf/201409/332952.htmlCan be Intent.putextra first ("name", "ZP");Again startactivity (Intent) uses the following code in the launched application: You can get the data.public class Mainactivity extends actionbaractivity {private TextView ed; @Override protected void onCreate

This article describes how to easily learn JNI data types through examples. All languages have their basic data types. To learn more, you must understand the most basic things. In JNI, we will ask: how is the data type in Java mapped to the C/C ++ local language? Directory: 1. A simple instance analysis 2. ing between Java and JNI

("person", "_id = ? and name = ?", new String[]{"1", "张三"}); ModifyContentValues cv = new ContentValues();cv.put("money", 25000);int i = db.update("person", cv, "name = ?", new String[]{"赵四"}); Inquire//arg1:要查询的字段//arg2：查询条件//arg3:填充查询条件的占位符Cursor cs = db.query("person", new String[]{"name", "money"}, "name = ?", new String[]{"张三"}, null, null, null);while(cs.moveToNext()){ // 获取指定列的索引值 String name = cs.getString(cs.getColumnIndex("name")); String money

public void Onsensorchanged (Sensorevent event) { final float alpha = 0.8; GRAVITY[0] = Alpha * Gravity[0] + (1-alpha) * event.values[0]; GRAVITY[1] = Alpha * Gravity[1] + (1-alpha) * event.values[1]; GRAVITY[2] = Alpha * gravity[2] + (1-alpha) * event.values[2]; Linear_acceleration[0] = event.values[0]-gravity[0]; LINEAR_ACCELERATION[1] = event.values[1]-gravity[1]; LINEAR_ACCELERATION[2] = event.values[2]-gravity[2]; }The

Next, let me explain how to use gzip for data delivery in the Android system. The gzip encoding on the HTTP protocol is a technique used to improve the performance of Web applications. Large-volume Web sites often use the gzip compression technology to reduce file size, there are two obvious advantages of reducing file size, one is to reduce storage space, the second is the transmission of files over the ne

auto-generated Method StubSuper.run ();Httpparams params = new Basichttpparams ();//interface to define network communicationHttpconnectionparams.setconnectiontimeout (params, 5000);//connection timeout is 5 secondsHttpconnectionparams.setsotimeout (params, 5000);//data transfer timeout is 5 secondsHttpClient client = new Defaulthttpclient (params);//Client Side implementationPost Method requestHttpPost po

Transfer from http://hi.baidu.com/hfutonline/blog/item/62b1e4de8bdf4b2e5882dd28.htmlRecently when doing Android project encountered a problem, the application initialization needs to batch to SQLite to insert a large number of numbers, causing the application to start too slow.Android using SQLite database, SQLite is a relatively lightweight database, after Google found that the problem of sqlite transactio

OverviewThis article will explain the data transformations between Java and native code, including conversions between the underlying types, and the transfer and transformation of arrays.Type conversion table the corresponding table between the Java base type and C + + Java Type C + + type Description Boolean Jboolean Unsigned 8-bit integer

Android: static variables for Activity data transmission Using Intent can easily transfer data between different activities. This is also officially recommended, but it also has some limitations. That is, Intent cannot pass objects that cannot be serialized. We can use static variables to solve this problem. Obj class

Gzip encoding on HTTP is a technology used to improve the performance of Web applications. Large-Traffic web sites often use gzip compression technology to reduce the file size and reduce the file size. One is to reduce the storage space, and the other is to transfer files over the network, this reduces the transmission time. After writing this blog, the author tested that MB of text data was transferred to

Now the resolver looks like this:1, using the JNI transfer Java method to start the album selection box2. Images from Java will be saved to the local3, using Cocos2d-x in Ccimage readingThe Java code is as follows:Start Picture selection boxprivate void Launchcamera (){TODO auto-generated Method StubIntent Intent = new Intent ();Intent.settype ("image/*");//set Intent TypeIntent.setaction (intent.action_get_content); Get picture information back to Ma