Android實(shí)現(xiàn)抖音評(píng)論彈窗與視頻聯(lián)動(dòng)縮放效果

setScaleX(float scaleX) //水平方向的縮放比例setScaleY(float scaleY) //垂直方向的縮放比例//scaleX scaleY = 1.0f 表示初始大小// scaleX scaleY < 1.0f，表示縮小，如scale=0.5f，表示寬高是原來(lái)的0.5倍//scaleX scaleY> 1.0f，表示放大，如scale=2.0f，表示寬高是原來(lái)的2.0倍//設(shè)置錨點(diǎn)的X坐標(biāo)值，以像素為單位。默認(rèn)是View的中心。setPivotX(float pivotX)//設(shè)置錨點(diǎn)的Y坐標(biāo)值，以像素為單位。默認(rèn)是View的中心。setPivotX(float?pivotX)

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    android:layout_width="match_parent"    android:layout_height="match_parent">
    <VideoView        android:id="@+id/videoView"        android:layout_width="match_parent"        android:layout_height="match_parent" />
    <android.support.design.widget.FloatingActionButton        android:id="@+id/floatBtn"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentEnd="true"        android:layout_alignParentBottom="true"        android:layout_gravity="bottom|end"        android:layout_margin="@dimen/fab_margin"        app:srcCompat="@android:drawable/ic_dialog_email" />
RelativeLayout>

        findViewById(R.id.floatBtn).setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                BottomSheetDialog bsd= new BottomSheetDialog();                bsd.setFragmentManager(getSupportFragmentManager())                        .setLayoutRes(R.layout.view_dialog_comment)                        .setCancelOutside(true)                        .setViewListener(v1 -> {                        })                        .show();            }        });

    public IBehaviorChanged getBehaviorChanged() {        return mBehaviorChanged;    }
    public void setBehaviorChanged(IBehaviorChanged behaviorChanged) {        mBehaviorChanged = behaviorChanged;    }
    public interface IBehaviorChanged {        void changedState(View bottomSheet, int state);
        void changedOffset(View bottomSheet, float slideOffset);    }

            BottomSheetBehavior behavior = BottomSheetBehavior.from(bottomSheet);            // 初始為展開(kāi)狀態(tài)            behavior.setState(BottomSheetBehavior.STATE_EXPANDED);            behavior.setPeekHeight(0);            //注意這句，初始的時(shí)候給一個(gè)默認(rèn)值，因?yàn)槟J(rèn)是展開(kāi)狀態(tài)，所以給的狀態(tài)是STATE_EXPANDED，具體可以根據(jù)需求來(lái)            if (mBehaviorChanged != null)                mBehaviorChanged.changedState(null, BottomSheetBehavior.STATE_EXPANDED);            behavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {                @Override                public void onStateChanged(@NonNull View bottomSheet, int newState) {                    //這里加上這句話是因?yàn)樾枰褷顟B(tài)加上，不然的話滑出屏幕會(huì)有黑色陰影                    //具體可以看源碼                    if (newState == BottomSheetBehavior.STATE_HIDDEN || newState == BottomSheetBehavior.STATE_COLLAPSED) {                        dismiss();                    }                    if (mBehaviorChanged != null)                        mBehaviorChanged.changedState(bottomSheet, newState);                }
                @Override                public void onSlide(@NonNull View bottomSheet, float slideOffset) {                    if (mBehaviorChanged != null)                        mBehaviorChanged.changedOffset(bottomSheet, slideOffset);                }            });

        if (scale) {            float width = Screen.getWidth();            float x = width / 2f;            videoView.setPivotX(x);            videoView.setPivotY(0);        } else {            videoView.setPivotX(0);            videoView.setPivotY(0);        }

           behavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {                @Override                public void onStateChanged(@NonNull View bottomSheet, int newState) {                }
                @Override                public void onSlide(@NonNull View bottomSheet, float slideOffset) {                    Log.e("BottomSheetCallback","bottomSheet"+bottomSheet.getY());????????????});

com.behavior.bottombehaviormaster E/BottomSheetCallback: bottomSheet382.0~~~com.behavior.bottombehaviormaster E/BottomSheetCallback: bottomSheet1230.0

                bcs.setBehaviorChanged(new BaseBottomSheetDialog.IBehaviorChanged() {                    @Override                    public void changedState(View bottomSheet, int state) {                        if (state == BottomSheetBehavior.STATE_EXPANDED) {                                float width = Screen.getWidth();                                float height = Screen.getHeight();                                float x = width / 2f;                                float scale = height - view.getHeight();                                videoView.setScaleX(scale / height);                                videoView.setScaleY(scale / height);                                videoView.setPivotX(x);                                videoView.setPivotY(0);                            });                        }                    }
                    @Override                    public void changedOffset(View bottomSheet, float slideOffset) {                        startAnimator(bottomSheet);                    }                });  /**  *  根據(jù)滑動(dòng)高度進(jìn)行縮放  * @param parent   */  private void startAnimator(View parent) {        float width = Screen.getWidth();        float height = Screen.getHeight();        float x = width / 2f;        float py = (parent.getY() + 50) / height;        videoView.setScaleX(py);        videoView.setScaleY(py);        videoView.setPivotX(x);        videoView.setPivotY(0);    }