Three types: relay type/matching type/individual type Single touch package com.example.myapplication.view import android.content.Context import android.graphics.Canvas import android.graphics.Paint import android.util.AttributeSet import android.view.MotionEvent import android.view.View import com.example.myapplication.dp class MultiTouchView1(context: Context, attrs: AttributeSet) : View(context, attrs) { private val bitmap = getBitmap() private val paint = Paint(Paint.ANTI_ALIAS_FLAG) private var offsetX = 0f //Initial position private var offsetY = 0f […]
Tag: touch
A brief analysis of Android View touch feedback principle
Rewrite OnTouchEvent() and write the touch algorithm inside the method Return true, indicating that the event is consumed, all touch feedback is no longer effective, and event ownership is returned if (event.actionMasked == MotionEvent.ACTION_UP){ performClick()//Lift the event to execute performClick to trigger the click } override fun onTouchEvent(event: MotionEvent): Boolean { //event touch event } […]
MFC touch screen virtual numeric keyboard idea
These days, I need to use a touch screen in MFC projects. At the beginning, I originally called an external keyboard, but my superiors were reluctant and had to write a simple numeric keyboard myself. I will post the ideas and code below. You still have to create the keyboard interface yourself. I am posting […]
RecycleView long press drag control ItemTouchHelper.Callback
1.Adapter Inherit RecycleView.Adapter In fact, it is not difficult to implement long-press and drag controls in RecycleView. Just rewrite ItemTouchHelper.Callback. ItemTouchHelper is a tool class that implements RecyclerView‘s side-sliding deletion and drag-and-drop movement. The following code is the ordinary RecycleView.Adapter implementation process except ItemTouchHelper.Callback. public class ItemAdapter extends RecyclerView.Adapter<ItemAdapter.Holder>{ private Context context; private ItemTouchHelper itemTouchHelper; […]
Android solves the problem of touch freeze and anti-shake in USB TP driver
I haven’t written anything for a long time, so let’s continue today. Article directory **background** **Problem Description** **initial analysis** **solution** **Tested and Verified** **20231020 Final Solution** **in conclusion** Background In a relatively mature support project, the customer replaced the USB touch screen. Since the equipment has been assembled into a complete machine, it is not […]
JavaScript implements handwritten signatures, can be handwritten on the touch screen, and supports dual-end saving on mobile and PC.
Table of Contents 1.HTML template 2. Get DOM elements and define variables 3. Create two canvas elements and set their width and height 4. Bind touch events: touchstart, touchmove, touchend and click 5. Implement touch event callback functions: startDrawing, draw and stopDrawing 6. Implement the function of drawing line segments: drawLine 7. Implement the function […]
Appium touch operations (short press, long press, zoom, slide, etc.) [2]
Table of Contents 1.Introduce the object: TouchAction: touch A. Click (tap) operation: B. Slide the screen multiple times: C. Long press 2.MultiAction —– Multi-touch zoom in and out operation 2.1 Zoom in and out based on analytical gesture operations 2.2 Another method for zooming in/out: zoom/pinch 3. Sliding screen operation: A. driver.swipe(x1, y1, x2, y2,duration) […]
Android registration screen touch event interception event distribution
Android registration screen touch event interception event distribution Preface Native sliding return gesture interception distribution analysis end Foreword After receiving the demand, it is necessary to realize the corresponding function to be triggered by sliding up and down with two fingers on the screen, and to intercept sliding conflicts; Currently, many types of functions can […]
AndroidAbout touch device TOOL_TYPE_STYLUS
Here you can view the motionEvent of the stylus through the log. @Override public boolean onTouchEvent(MotionEvent event) { Log.i(tag, “event=” + event); return true; } @Override public boolean onGenericMotionEvent(MotionEvent event) { Log.i(tag, “G event=” + event); return true; } When approaching the screen, call onGenericMotionEvent When the screen is touched, onTouchEvent is called, toolType[0]=TOOL_TYPE_STYLUS Complete […]
Develop lvgl touch panel based on Arduino IDE
The first is how to configure vgl in the ArduinoIDE environment. You can refer to Arduino – LVGL documentationhttps://docs.lvgl.io/master/get-started/platforms/ arduino.html#get-the-lvgl-arduino-library For the ESP32 configuration of the touch panel, select the ESP32S3 Dev module: its configuration needs to be adjusted according to the following documents: Sunton ESP32-S3 4.3 inch 800*400 IPS with Touch – Makerfabs Wiki […]