Android Realizes Left Slide Exit Perfect Package of Activity

1: Define a parent container of its own and let it inherit from a layout (LinearLayout, RelativeLayout can be used)

public class SildingFinishLayout extends RelativeLayout implements View.OnTouchListener {
  /**
   * SildingFinishLayout Parent layout of layout 
   */
  private ViewGroup mParentView;
  /**
   *  Handling sliding logic View
   */
  private View touchView;
  /**
   *  Minimum distance of sliding 
   */
  private int mTouchSlop;
  /**
   *  Press the dot X Coordinates 
   */
  private int downX;
  /**
   *  Press the dot Y Coordinates 
   */
  private int downY;
  /**
   *  Temporary storage X Coordinates 
   */
  private int tempX;
  /**
   *  Sliding class 
   */
  private Scroller mScroller;
  /**
   * SildingFinishLayout Width of 
   */
  private int viewWidth;
  /**
   *  Is the record sliding 
   */
  private boolean isSilding;


  private OnSildingFinishListener onSildingFinishListener;
  private boolean isFinish;


  public SildingFinishLayout(Context context, AttributeSet attrs) {
    this(context, attrs, 0);
  }


  public SildingFinishLayout(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);


    mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
    mScroller = new Scroller(context);
  }


  @Override
  protected void onLayout(boolean changed, int l, int t, int r, int b) {
    super.onLayout(changed, l, t, r, b);
    if (changed) {
//  Get SildingFinishLayout Parent layout of the layout 
      mParentView = (ViewGroup) this.getParent();
      viewWidth = this.getWidth();
    }
  }


  /**
   *  Settings OnSildingFinishListener,  In onSildingFinish() Method finish Activity
   *
   * @param onSildingFinishListener
   */
  public void setOnSildingFinishListener(
      OnSildingFinishListener onSildingFinishListener) {
    this.onSildingFinishListener = onSildingFinishListener;
  }


  /**
   *  Settings Touch Adj. View
   *
   * @param touchView
   */
  public void setTouchView(View touchView) {
    this.touchView = touchView;
    touchView.setOnTouchListener(this);
  }


  public View getTouchView() {
    return touchView;
  }


  /**
   *  Scroll out interface 
   */
  private void scrollRight() {
    final int delta = (viewWidth + mParentView.getScrollX());
//  Call startScroll Method to set the 1 Some scrolling parameters, we are in computeScroll() Method is called in the scrollTo To scroll item
    mScroller.startScroll(mParentView.getScrollX(), 0, -delta + 1, 0,
        Math.abs(delta));
    postInvalidate();
  }


  /**
   *  Scroll to the starting position 
   */
  private void scrollOrigin() {
    int delta = mParentView.getScrollX();
    mScroller.startScroll(mParentView.getScrollX(), 0, -delta, 0,
        Math.abs(delta));
    postInvalidate();
  }


  /**
   * touch Adj. View Whether it is AbsListView ,   For example ListView, GridView Equivalent to its subclass 
   *
   * @return
   */
  private boolean isTouchOnAbsListView() {
    return touchView instanceof AbsListView ? true : false;
  }


  /**
   * touch Adj. view Whether it is ScrollView Or its subclasses 
   *
   * @return
   */
  private boolean isTouchOnScrollView() {
    return touchView instanceof ScrollView ? true : false;
  }


  @Override
  public boolean onTouch(View v, MotionEvent event) {
    switch (event.getAction()) {
      case MotionEvent.ACTION_DOWN:
        downX = tempX = (int) event.getRawX();
        downY = (int) event.getRawY();
        break;
      case MotionEvent.ACTION_MOVE:
        int moveX = (int) event.getRawX();
        int deltaX = tempX - moveX;
        tempX = moveX;
        if (Math.abs(moveX - downX) > mTouchSlop
            && Math.abs((int) event.getRawY() - downY) < mTouchSlop) {
          isSilding = true;


//  If touchView Yes AbsListView , 
//  Then when the finger slides, cancel item Click event, otherwise we slide along with it item The occurrence of click event 
          if (isTouchOnAbsListView()) {
            MotionEvent cancelEvent = MotionEvent.obtain(event);
            cancelEvent
                .setAction(MotionEvent.ACTION_CANCEL
                    | (event.getActionIndex() << MotionEvent.ACTION_POINTER_INDEX_SHIFT));
            v.onTouchEvent(cancelEvent);
          }


        }


        if (moveX - downX >= 0 && isSilding) {
          mParentView.scrollBy(deltaX, 0);


//  Shield in sliding process ListView ScrollView Wait for your own sliding event 
          if (isTouchOnScrollView() || isTouchOnAbsListView()) {
            return true;
          }
        }
        break;
      case MotionEvent.ACTION_UP:
        isSilding = false;
        if (mParentView.getScrollX() <= -viewWidth / 2) {
          isFinish = true;
          scrollRight();
        } else {
          scrollOrigin();
          isFinish = false;
        }
        break;
    }


//  Suppose touch Adj. view Yes AbsListView Or ScrollView  After we deal with our own logic above, 
//  And hand it over AbsListView, ScrollView Handle your own logic 
    if (isTouchOnScrollView() || isTouchOnAbsListView()) {
      return v.onTouchEvent(event);
    }


//  Other situations are returned directly true
    return true;
  }


  @Override
  public void computeScroll() {
//  Call startScroll At the time of scroller.computeScrollOffset() Return true , 
    if (mScroller.computeScrollOffset()) {
      mParentView.scrollTo(mScroller.getCurrX(), mScroller.getCurrY());
      postInvalidate();


      if (mScroller.isFinished()) {


        if (onSildingFinishListener != null && isFinish) {
          onSildingFinishListener.onSildingFinish();
        }
      }
    }
  }

  public interface OnSildingFinishListener {
    public void onSildingFinish();
  }
}

2.Acitity

In the onCreate () method of Activity

 @Override
  public void onCreate(@Nullable Bundle savedInstanceState, @Nullable PersistableBundle persistentState) {
    super.onCreate(savedInstanceState, persistentState);
    SildingFinishLayout mSildingFinishLayout = (SildingFinishLayout) findViewById(R.id.timed_task_SildingFinishLayout);
mSildingFinishLayout
    mSildingFinishLayout .setOnSildingFinishListener(new SildingFinishLayout.OnSildingFinishListener() {
      @Override
      public void onSildingFinish() {
        finish();
      }
    });
    mSildingFinishLayout .setTouchView(mSildingFinishLayout);// Just bind the underlying layout  : If it doesn't work, change to you activity  Inside the layout view You can do it  
  }

Up to now, this function has been implemented

Problem solving: This will cause the problem of sliding left background white

1. style. xml increased in middle

<style name="AppTheme" parent="android:Theme.Light">
  <item name="android:windowIsTranslucent">true</item>
  <item name="android:windowNoTitle">true</item>
  <item name="android:windowBackground">@android:color/transparent</item>
</style>

2 Add to the attributes of acvitiy

android:theme="@style/AppTheme" 

3 1 Detailed Explanation of Some Attributes

<item name="android:windowFrame">@null</item>  : Dialog Adj. windowFrame Box is None 
<item name="android:windowIsFloating">true</item> : Does it emerge in activity Above 
<item name="android:windowIsTranslucent">false</item>: Is it translucent 
<item name="android:windowNoTitle">true</item>: Whether to display title
<item name="android:windowBackground">@drawable/dia_bg</item>: Settings dialog Background of 
<item name="android:backgroundDimEnabled">false</item>:  Is the background transparent