Android 可开关式顶部下拉view

效果：

实现方法

1、layout文件结构

最外部使用相对布局 <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context=".MainActivity">

布局最下面添加头部下拉可隐藏view

<LinearLayout android:id="@+id/mmm" android:layout_width="match_parent" android:layout_height="50dp" android:orientation="horizontal" android:background="@color/colorPrimaryDark"> <TextView android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:textColor="@color/colorAccent" android:textSize="18dp" android:text="可开关——下拉view"/> </LinearLayout> </RelativeLayout>

2、activity实现下拉显示与隐藏

1、实例化 private LinearLayout mNumberLayout; private int mTranslationY = 0; mNumberLayout = (LinearLayout) findViewById(R.id.mmm);

2、显示，隐藏、两个方法 private void showNumberView() { ViewHelper.setAlpha(mNumberLayout, 0); ViewHelper.setTranslationY(mNumberLayout, mTranslationY - mNumberLayout.getHeight()); ViewPropertyAnimator.animate(mNumberLayout).alpha(1f).translationY(mTranslationY) .setInterpolator(new DecelerateInterpolator()).setDuration(300) .setStartDelay(0).setListener(new CustomAnimatorListener() { @Override public void onAnimationEnd(Animator animator) { } }).start(); } private void hideNumberView() { ViewPropertyAnimator.animate(mNumberLayout).alpha(0f) .translationY(-mNumberLayout.getHeight() + mTranslationY) .setInterpolator(new AccelerateInterpolator()).setDuration(300) .setListener(new CustomAnimatorListener() { @Override public void onAnimationEnd(Animator animator) { } }).start(); }

3、点击方法 private boolean ifshow; layout_bottom_bar.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if (ifshow){ showNumberView(); ifshow=!ifshow; }else { hideNumberView(); ifshow=!ifshow; } } });