XjojoX1989

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
 android:fillAfter="true"
 android:zAdjustment="normal" >
  <translate
   android:duration="100" //100毫秒
   android:fromXDelta="0" //初始Ｘ
   android:fromYDelta="0" //初始Ｙ
   android:toXDelta="100" //結束位置Ｘ
   android:toYDelta="100" //結束位置Ｙ

XjojoX1989

velocityTracker.computeCurrentVelocity(1000);
int xVelocity = (int) velocityTracker.getXVelocity();
int yVelocity = (int) velocityTracker.getYVelocity();

XjojoX1989

VelocityTracker velocityTracker = VelocityTracker.obtain();
velocityTracker.addMovement(event);

XjojoX1989

ViewConfiguration.get(getContext()).getScaledTouchSlop();

XjojoX1989

ObjectAnimator.ofFloat(targetView, "translationX", 0, 100).setDuration(100).start();

XjojoX1989

ObjectAnimator.ofFloat(targetView,"translationX",0,100).setDuration(100).start();

XjojoX1989

public void scrollTo(int x,int y) {
    if (mScrollX != x || mScrollY != y) {
       int oldX = mScrollX;
       int oldY = mScrollY;
       mScrollX = x;
       mScrollY = y;
       invalidateParentCaches();        
       onScrollChanged(mScrollX,mScrollY,oldX,oldY);
       if (!awakenScrollBars()) {
           postInvalidateOnAnimation();

XjojoX1989

//創建Scroller
Scroller scroller = new Scroller(mContext);
// 自訂的方法，緩慢滾動到指定位置
private void smoothScrollTo(int destX,int destY, int time) {
    int scrollX = getScrollX();
    int deltaX = destX -scrollX;
    // 1000ms內滑向destX，效果就是慢慢滑動
    mScroller.startScroll(scrollX, 0, deltaX, 0, time);
    invalidate();
}

XjojoX1989

    //自訂的方法，緩慢滾動到指定位置
    private void smoothScrollTo(int destX, int destY, int time) {
        int scrollX = getScrollX();
        int deltaX = destX - scrollX;
        // 1000ms內滑向destX，效果就是慢慢滑動
        mScroller.startScroll(scrollX, 0, deltaX, 0, time);
        invalidate();
    }

    //計算一段時間間隔內偏移的距離，並返回是否滾動結束的標記

XjojoX1989

public class MainActivity : AppCompatActivity()  {
   
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        findViewById(R.id.btIntentService).setOnClickListener{
            //啟動IntentService
            startService(new Intent(MainActivity.this, MyIntentService.class))
        }
    }