TextViewExpandableAnimation#

Expandable TextView With Smooth Transition Animation

Preview

How to get it work？

• Clone or download my project

• Copy TextViewExpandableAnimation.java and some resource files such as attrs.xml into your own project

• in xml layout file

<com.freecats.demo.view.TextViewExpandableAnimation xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/tv_expand"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:tvea_expandBitmap="@drawable/icon_green_arrow_down"
        app:tvea_expandLines="3"
        app:tvea_shrinkBitmap="@drawable/icon_green_arrow_up"
        app:tvea_textContentColor="@color/color_gray_light_content_text"
        app:tvea_textContentSize="@dimen/sp_txt_size_content"
        app:tvea_textExpand="@string/expand"
        app:tvea_textShrink="@string/shrink"
        app:tvea_textStateColor="@color/colorPrimary" />

in java

     TextViewExpandableAnimation tvExpand = (TextViewExpandableAnimation) findViewById(R.id.tv_expand);
     tvExpand.setText(text);

All Done!

If you use it as an item in RecyclerView, you may have to make sure your RecyclerView Adapter's onBindViewHolder looks like this to avoid Unexpected Shrink/Expand State.

@Override
    public void onBindViewHolder(RecyclerViewAdapter.ViewHolder holder, final int position) {
        //record its state
        holder.tvExpand.setOnStateChangeListener(new TextViewExpandableAnimation.OnStateChangeListener() {
            @Override
            public void onStateChange(boolean isShrink) {
                ContentModel cm = mLists.get(position);
                cm.setShrink(isShrink);
                mLists.set(position, cm);
            }
        });
        holder.tvExpand.setText(mLists.get(position).getText());
        //important! reset its state as where it left
        holder.tvExpand.resetState(mLists.get(position).isShrink());

    }

Attributes Support as below

Attributes	format
tvea_expandLines	integer
tvea_expandBitmap	reference
tvea_shrinkBitmap	reference
tvea_textContentColor	color
tvea_textContentSize	dimension
tvea_textExpand	string
tvea_textShrink	string
tvea_textStateColor	color

License

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.