android TextSwitcher一个带有文字切换动画效果

652b6dfaaeed5905abdaa08971f45402.gif

//消息
 textSwitcher.setFactory {
 val textView = TextView(activity)
 textView.textSize = 40f
 textView.setTextColor(resources.getColor(R.color.black_33))
 textView.textSize = 15f
 textView.isSingleLine = true
 textView.ellipsize = TextUtils.TruncateAt.END;
 textView
}
messageHandleTime()

 /**
    * 每间隔2秒切换message
 */
private fun messageHandleTime(){
     messageDis = Observable.interval(0,3, TimeUnit.SECONDS)
         .subscribeOn(Schedulers.newThread())
         .subscribe {
           activity?.runOnUiThread {
             textSwitcher.setText(messages[messageIndex ++ % messages.size]);
           }
      }
}

布局

<TextSwitcher
   android:id="@+id/textSwitcher"
   android:inAnimation="@anim/message_in_anim"
   android:outAnimation="@anim/message_out_anim"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:layout_centerVertical="true"
   android:layout_marginLeft="7dp"
  android:layout_marginRight="7dp"/>

动画
message_in_anim

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="500">

    <translate
        android:fromXDelta="0"
        android:fromYDelta="100%"
        android:toXDelta="0"
        android:toYDelta="0" />

</set>

message_out_anim

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="500">

    <translate
        android:fromXDelta="0"
        android:fromYDelta="0"
        android:toXDelta="0"
        android:toYDelta="-100%" />

</set>

点击事件

textSwitcher.setOnClickListener(this)

override fun onClick(v: View?) {
        when(v?.id){
            R.id.textSwitcher ->{//message点击
                activity?.applicationContext?.toast("${messageIndex % messages.size}")
            }
        }
    }