利用ObjectAnimator控制view的位置
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| 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(); |
應用
使用TouchListener來控制view的移動
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| 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(); | |
| } | |
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