Java uses arraycopy to implement multiple-hit event _java

The example of this article for everyone to share the Java arraycopy to achieve a multiple-hit event of 3 ways for everyone to refer to, the specific contents are as follows

1, double-click the implementation of the event

We specify that the event interval of two clicks is a double click event within 500 milliseconds, and this value can be arbitrarily qualified.

    Bt_click.setonclicklistener (New Onclicklistener () {
      @Override public
      void OnClick (View v) {
        if starttime !=0) {
          Long endtime = System.currenttimemillis ();
          if (endtime-starttime<500) {
            toast.maketext (Getapplicationcontext (), "two clicks", 0). Show ();
          }
        StartTime = System.currenttimemillis ();
      }
    );

2. Arraycopy usage

Arraycopy is a function for array replication

Let's take a look at a small example of arraycopy.

    Static initialization of two different lengths of array
    int src[] = {1,2,3,4,5,6};
    int dest[] = {10,9,8,7,6,5,4,3,2,1};
    Copy the 4 elements of the array src into the array dest
    system.arraycopy (src,1,dest,2,4);

    Output array dest for
    (int i=0;i<10;i++)
    {
      System.out.println (dest[i]);
    }

Output results

From the result we can see the use of arraycopy

Parameters:

1. The original array (the array to be copied)
2. Index value of the copy starting position of the original array
3. Target array (data from the original array-copy –> target array)
4. The starting index position of the target array accepted value
5. Length of Copy
-

3, the implementation of multiple-hit event

Private long[] mHITs = new Long[3];
    Bt_many_click.setonclicklistener (New Onclicklistener () {
      @Override public
      void OnClick (View v) {
        System.arraycopy (mhits, 1, mhits, 0, mhits.length-1);
        Mhits[mhits.length-1] = Systemclock.uptimemillis ();
        if (mhits[mhits.length-1]-mhits[0]<500) {
          //response to a three-click event
          toast.maketext (Getapplicationcontext (), "clicked three!!!!" , 0). Show ();}}
    ;

mHITs array with a length of 3 (that is, multiple hits), and the last Mhits[mhits.length-1] stores the time of each click

Arraycopy once per click

When the click is enough 3 times that mhits[0] has a value to determine the last click and the first click of the time interval, less than our limited time is determined to three hits.

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