可折叠TextView控件使用：ExpandableTextView

使用

build.gradle添加

compile ‘com.ms-square:expandableTextView:0.1.4’

xml

<com.ms.square.android.expandabletextview.ExpandableTextView
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:expandableTextView="http://schemas.android.com/apk/res-auto"
        android:id="@+id/expand_text_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        expandableTextView:maxCollapsedLines="4"
        expandableTextView:animDuration="200">
        <TextView
            android:id="@id/expandable_text"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="10dp"
            android:layout_marginRight="10dp"
            android:textSize="16sp"
            android:textColor="#666666" />
        <ImageButton
            android:id="@id/expand_collapse"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:padding="16dp"
            android:layout_gravity="right|bottom"
            android:background="@android:color/transparent"/>
    </com.ms.square.android.expandabletextview.ExpandableTextView>

java

ExpandableTextView expTv1 = (ExpandableTextView) findViewById(R.id.expand_text_view);

expTv1.setText(getString(R.string.dummy_text1));

效果

支持ListView

属性

maxCollapsedLines：（默认为8）显示的未被折叠的文本行数
animDuration：（默认为300ms）为展开/折叠的动画时间
animAlphaStart：（默认为0.7f）当动画开始时文字的透明的度。如果您想禁用透明度，设置这个值为1
expanddrawable：自定义ImageButton展开的图像设置
collapsedrawable：自定义ImageButton折叠的图像设置

样式修改

看源码得知不能设置水平布局

如果想做成如下效果，把剪头拿到右边：

可以这样布局

<com.ms.square.android.expandabletextview.ExpandableTextView
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:expandableTextView="http://schemas.android.com/apk/res-auto"
        android:id="@+id/expand_text_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/item_distrib_goodsImage"
        android:layout_marginTop="-15dp"
        android:layout_toRightOf="@+id/item_distrib_goodsImage"
        expandableTextView:animAlphaStart="1"
        expandableTextView:animDuration="200"
        expandableTextView:collapseDrawable="@drawable/expandable_textview_button_collapse"
        expandableTextView:expandDrawable="@drawable/expandable_textview_button_expand"
        expandableTextView:maxCollapsedLines="1"
        >

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <TextView
                android:id="@id/expandable_text"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:textColor="@color/colorThree"
                android:textSize="@dimen/fontFour"
                />

            <ImageButton
                android:id="@id/expand_collapse"
                android:layout_width="13dp"
                android:layout_height="13dp"
                android:background="@android:color/transparent"
                android:padding="5dp"
                />
        </LinearLayout>

    </com.ms.square.android.expandabletextview.ExpandableTextView>

注意

需要注意的点为：

1、中间加一个LinearLayout，设置android:orientation=”horizontal”
2、LinearLayout中的TextView设置android:layout_weight=”1”
3、图中剪头展开和折叠的样式是通过设置expanddrawable和
collapsedrawable来实现的
4、我贴出的代码中

expandableTextView:collapseDrawable="@drawable/expandable_textview_button_collapse"
        expandableTextView:expandDrawable="@drawable/expandable_textview_button_expand"

分别是两个drawable下的文件，源码为：

expandable_textview_button_expand.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <bitmap android:src="@mipmap/bg_arrow_right_gray" />
    </item>
</layer-list>

expandable_textview_button_collapse.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <bitmap android:src="@mipmap/bg_arrow_down_gray" />
    </item>
</layer-list>

5、TextView和ImageButton的id必须为”@id/expandable_text” 和 “@id/expand_collapse”

A ExpandableTextView BY Manabu-GT:
​​​https://github.com/Manabu-GT/ExpandableTextView​​