利用ObjectAnimator控制view的位置

	View view;
	ObjectAnimator valueAnimator =
	ObjectAnimator.ofFloat(view, "translationY", 80);
	//"translationY"為property name，80為位移量
	valueAnimator.setDuration(1000); //動畫完成的時間
	valueAnimator.start();

view raw ObjectAnimator.java hosted with ❤ by GitHub

應用

使用TouchListener來控制view的移動

	scrollView.setOnTouchListener(new View.OnTouchListener() {
	@Override
	public boolean onTouch(View v, MotionEvent event) {
	switch (event.getAction()){
	case MotionEvent.ACTION_DOWN:
	mFirstY = event.getY();//getY获取的是相对于View的坐标，getRawY获取的是相对于屏幕的坐标
	break;
	case MotionEvent.ACTION_MOVE:
	mLastY = event.getY();
	if(mLastY - mFirstY > mTouchSlop){//手指向下滑动，显示toolbar
	if(!mShow){
	// Log.i("tag", "mLastY_手指下滑="+mLastY);
	toolbarAnim(0);//显示
	mShow = !mShow;
	}
	}else if(mFirstY - mLastY > mTouchSlop){//手指向上滑动，隐藏toolbar
	if(mShow){
	// Log.i("tag", "mLastY_手指上滑="+mLastY);
	toolbarAnim(1);//隐藏
	mShow = !mShow;
	}
	}
	break;
	default:break;
	}
	return false;
	}
	});
	public void toolbarAnim(int flag){
	if(mAnimator != null && mAnimator.isRunning()){
	mAnimator.cancel();
	}
	if(mAnimatorforll != null && mAnimatorforll.isRunning()){
	mAnimatorforll.cancel();
	}
	if(flag == 0){
	// Log.i("tag", "手指下滑,》》》》》》》显示");
	// mAnimator = ObjectAnimator.ofFloat(toolbar, "translationY", toolbar.getTranslationY(), 0);
	mAnimatorforll = ObjectAnimator.ofFloat(ll, "translationY", ll.getTranslationY(), 0);
	params.height = ll.getHeight()-share_button.getHeight();
	ll.setLayoutParams(params);
	}else if(flag == 1){
	// Log.i("tag", "手指上滑，》》》》》》》隐藏");
	// mAnimator = ObjectAnimator.ofFloat(toolbar, "translationY", toolbar.getTranslationY(),-share_button.getHeight());
	mAnimatorforll = ObjectAnimator.ofFloat(ll, "translationY", ll.getTranslationY(),-share_button.getHeight());
	params.height = ll.getHeight()+share_button.getHeight();
	ll.setLayoutParams(params);
	}
	// mAnimator.start();//开始动画
	mAnimatorforll.start();
	}

view raw touchlistener.java hosted with ❤ by GitHub