Programmer Group

According to the Bluetooth communication program written by google demo, when receiving Bluetooth information, it is found that some of the received data are lost and disordered. Viewing the data transmission result of Bluetooth module on the computer serial port is normal. But when using Bluetooth to transmit data, the problem of data loss ...

Of all Android's commonly used native controls, ListView is probably the most complex one. It is designed to deal with a lot of content elements, and the mobile screen can't show all the content. ListView can display content in the form of a list, and content beyond the screen can be moved to the screen by simply sliding through the fingers. ...

Android Studio Simple UI Interface Relative Layout + Linear Layout is used to design and support international operation. Implementation process: 1. Copy the eight icons to the res/drawable folder 2. Create a vertical linear layout and create four relative layouts in the linear layout 3. Add the corresponding TextView to the relative lay ...

Making Simple CSS Fence Layout As we all know, Bootstrap has built-in a responsive, mobile device-preferred streaming grid system, which automatically changes the layout with the change of the display screen or viewport. The author has used bootstrap framework in the past, which is the most impressive and frequently used fence layout. But it ...

1. Operation effect diagram 2. Design Thought (Realization Principle) 1. Copy the eight icons to the res/drawable folder 2. Create a vertical linear layout and create four relative layouts in the linear layout 3. Add the corresponding TextView to the relative layout 4. Store extracted styles in style.xml file under the values file 5. Cr ...

Summary: In the development of Android mobile client, multi-threading is often used to operate. We usually put time-consuming operations into separate threads to execute, so as to avoid occupying the main threads and bring bad user experience to users. However, it is impossible to operate the main thread (UI thread) in the sub-thread, and ...

As we all know, the format of listview is certain, and the data sources are indeed diverse. At this time, an adapter is needed to convert the data sources into the format to be displayed by listview. baseAdapter was born. The display and caching mechanisms of listview and gridView are as follows Everyone knows that the size of the screen ...

For Internet of Things applications, it is particularly necessary to build an HTML5 mobile app. In order to develop HTML 5 app, besides using React Native, stable ionic + Angular JS is currently preferred to develop iOS and Android. The function of the front-end of the app version we want to develop is the same as that of the front-end of the w ...

I implemented this text messaging using 20 free items from www.laidx.com to test the code. That is to say, there are methods in my javaScript that link to the HTTP interface he provides. This implementation has only front page, no background logic, and is inherently insecure. Because my random numbers are generated directly in the js method a ...

One requirement of the project is to get the Bluetooth address that has been connected. private void getConnectBt() { LogUtil.i("getConnectBt"); int a2dp = _bluetoothAdapter.getProfileConnectionState(BluetoothProfile.A2DP); int headset = _bluetoothAdapter.getProfileConnectionState(BluetoothProfile.HEADSET); in ...