how to transfer data between android phones

The Android mobile operating system is an open-source operating system based on the Linux platform. It can be applied to mobile phones to help us achieve many needs. For example, saving data on Android is an important operation skill. Android component concepts Detailed e

1. Transfer data to an activity downActivity11Button button=(Button) Findviewbyid (r.id.button1);2Button.setonclicklistener (NewOnclicklistener () {3 4 @Override5 Public voidOnClick (View v) {6Intent intent=NewIntent ("1111111111111111111");7Intent.addcategory ("Android.intent.category.MY_CATEGORY");8Intent.putextra ("AAA", "This is a message");9Startactivityforresult (Intent, 0x11)

The Android system seems to have become the preferred target for virus authors around the world, with new malware infecting more devices every day. This time, security company Trend Micro released a warning that they found a new Android backdoor--ghostctrlGhostctrl was found to have 3 versions, the first generation to steal information and control the functionality of some devices, the second generation ad

data public, you can use either of the following methods:Method: Create a content provider of your own or add your data to an existing contentProvider, provided that you have the same data type and the permission to write to the content provider. How can I obtain data exposed by other applications through a set of s

" android:allowbackup=" true " android:icon=" @mipmap/ic_launcher " android:label=" @string/ App_name " android:roundicon=" @mipmap/ic_launcher_round " android:supportsrtl=" true " android:theme=" @style/apptheme "> 2. Using the Clipboard to pass a complex data transfer methodThe first page to store data is as fol

Android study note 21. Use ContentProvider for data sharing (4). ContentProvider and androidprovider of the Operating System (contact)The Android system provides a large number of contentproviders, such as contact information and multimedia information of the system. Our developed applications mainly call the query () provided by the system's ContentProvider thro

person group by name have Count (*) G T;1 Paging SQL is similar to MySQL, the following SQL statement gets 5 records, skipping the previous 3 records SELECT * From account limit 5 offset 3 Or SELECT * From account limit 3,5 Insert statement: Insert into Table name (field list) VALUES (value list). Such as: INSERT into person (name, age) VALUES (' Xiaoming ', 3) UPDATE statement: Update table name SET field name = value WHERE Condition clause. Such as: Update person set name= ' x

, that is, the Directory of the SD card. ③ Use FileInputStream, FileOutputStream, FileReader, or FileWriter to read and write files in the SD card. ④ To have the permission to read and write SD, add the following two configurations to the AndroidAManifest. xml file: · SQLiteDatabase SQLite is only an embedded database engine. It is applicable to the access to a proper amount of data on devices with limited resources (such as mobile

Most Android phones have sensors, sensor types are direction, acceleration (gravity), light, magnetic field, distance (proximity), temperature, etc.Direction sensor: Sensor.type_orientationAcceleration (Gravity) Sensor: Sensor.type_accelerometerLight sensor: Sensor.type_lightmagnetic field Sensor: Sensor.type_magnetic_fieldDistance (proximity) sensor: sensor.type_proximityTemperature sensor: Sensor.type_tem

in the "References" section at the end of this article.3. Using external storageExternal storage in Android is usually an SD card, and files stored externally are often shared by individual applications. Obviously, when we want to keep the data shared by various applications in the system, we can consider using external storage, on the other hand, because the internal storage of mobile

Learn android from scratch (Data Storage (1) SharedPreferences attribute file. 35 .) There are five ways to save data in android: Shared Preferences Store private primitive data in key-value pairs. Key-value pairs of the corresponding attribute file storage I

Learn android from scratch There are five ways to save data in android: Shared Preferences Store private primitive data in key-value pairs. Key-value pairs of the corresponding attribute file storage Internal Storage Store private data on the device memo

In an Android app, I use Fragmentpageradapter to handle cross-slide of multiple Fragment pages. But I ran into the problem that when the Fragment corresponding dataset changed, I wanted to be able to trigger the Fragment page to use the new data to adjust or regenerate its contents by calling Madapter.notifydatasetchanged (), but when I called Notifydatasetchanged () and found nothing happened. After the s

In the Android operating system, data transmission and implementation methods are diversified. You can choose a method that suits your needs for operations. Here we will first introduce the Android data transmission methods in detail. First, we use the most data

Data transmission between activities With some knowledge of Android, it is not difficult to find that androidProgramThe UI framework is similar to the web page concept. Every component used to render a page,ActivityAnd are independent from each other. They are scheduled and integrated through the core of the system, and communicate with each other throughIntentMechanism.Each architecture has its own advant

I. Intent Functions Intent is frequently used in Android. Whether it is page transfer, data transfer, or external callProgramIntent is required for all system functions. Android has three basic components: Activity, service, and broadcastreceiver. They are all activated