经常上google play下载软件，看到它的伸缩式的软件介绍很感兴趣。功能截图如下：
点击文本会下拉更多详细介绍，实现这一功能很简单，废话不多说，直接上代码
private boolean isExpanded = false; private int lastHeight = 0; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_expand_in_context); final ViewGroup expandableContainer = (ViewGroup) findViewById(R.id.expandable_container); findViewById(R.id.expandable_text).setOnClickListener( new View.OnClickListener() { @Override public void onClick(View v) { if (isExpanded) { ViewGroup.LayoutParams params = (ViewGroup.LayoutParams) expandableContainer .getLayoutParams(); params.height = lastHeight; expandableContainer.setLayoutParams(params); expandableContainer.invalidate(); } else { lastHeight = expandableContainer.getHeight(); ViewGroup.LayoutParams params = (ViewGroup.LayoutParams) expandableContainer .getLayoutParams(); params.height = ViewGroup.LayoutParams.WRAP_CONTENT; expandableContainer.setLayoutParams(params); expandableContainer.invalidate(); } isExpanded = !isExpanded; } }); }
布局只需要这样：
<FrameLayout android:id="@+id/expandable_container" android:layout_width="wrap_content" android:layout_height="200dp" android:layout_below="@+id/above" android:layout_margin="15dp" > <TextView android:id="@+id/expandable_text" android:layout_width="match_parent" android:layout_height="match_parent" android:ellipsize="end" android:text="@string/loremipsum" android:clickable="true"/> </FrameLayout>父布局限定了可限示的高度，可以使文本不用一次性全部显示，为屏幕节省空间。等用户点击查时才一次性显示全部给用户，再一次点击则隐藏掉。。原理很简单。
转载于:https://www.cnblogs.com/TerryBlog/archive/2013/03/12/2956165.html
相关资源：数据结构—成绩单生成器