Android Custom View Implementation of Gesture Sliding Control

This control shares the specific code for the Android gesture sliding control with everyone for reference, and the specific content is as follows

1Create a custom control class: MyView

public class MyView extends Button{}}
//Record the coordinate values after the last slide
private int lastX;
private int lastY;
public MyView(Context context) {
  super(context);
  // TODO Auto-generated constructor stub
}
public MyView(Context context, AttributeSet attrs) {
  super(context, attrs);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
  // Get the xy values of the view relative to the phone screen
  int x = (int) event.getRawX();
  int y = (int) event.getRawY();
  switch (event.getAction()) {
    case MotionEvent.ACTION_DOWN:
      break;
    case MotionEvent.ACTION_MOVE:
      int deltaX = x-lastX;
      int deltaY = y-lastY;
      int translationX = (int) (ViewHelper.getTranslationX(this) + deltaX);
      int translationY = (int) (ViewHelper.getTranslationY(this) + deltaY);
      ViewHelper.setTranslationX(this, translationX);
      ViewHelper.setTranslationY(this, translationY);
      break;
    case MotionEvent.ACTION_UP:
      break;
    default:
      break;
  }
  lastX = x;
  lastY = y;
  return true;
}

The above code is a custom button class that overrides the onTouchEvent() method to listen for user sliding. Since we're talking about sliding, there must be a statement about the offset.

translationX and translationY are the offset values of the View's top-left corner relative to the parent layout. Animation sliding is achieved through the third-party library nineoldandroids.

ViewHelper.getTranslationY(this) calculates the offset of the View, the initial value is 0, the offset value to the left is negative, and the offset value to the right is positive.

2.xml layout

<&63;xml version="1.0" encoding="utf-8"&63>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
>
 <com.example.administrator.slide.MyView
   android:id="@"+id/myview"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="I can slide"/>
</RelativeLayout>

That's all for this article, I hope it will be helpful to everyone's learning, and I also hope everyone will support Yell Tutorial more.

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