我正在尝试在 android 平台上进行动画倒计时,显示 textView 中的数字 3 在 scale 属性上从 0 增长到 1.5,因此数字 2、1 和“GO!”。
我正在使用一个 textView、一个 Animation 和一个 AnimationListener,但动画不能按我的意愿工作,它只在显示数字 3 的第一个动画中工作,所以它显示了“go!”这个词 没有动画。
我究竟做错了什么?
谢谢!
这里查看 counter.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_height="fill_parent"
android:layout_width="fill_parent" android:gravity="center_vertical|center_horizontal">
<TextView
android:id="@+id/txtCount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="3" android:textColor="#ffffff" android:textSize="150dp"/>
</LinearLayout>
<?xml version="1.0" encoding="UTF-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<scale
android:interpolator="@android:anim/linear_interpolator"
android:fromXScale="0"
android:toXScale="1.5"
android:fromYScale="0"
android:toYScale="1.5"
android:fillAfter="false"
android:duration="1000" />
</set>
我的代码:
public class AdivinhacaoActivity extends Activity {
...
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
...
//async task
new loaderImages(this).execute();
}
private class loaderImages extends AsyncTask<Void, String, Bitmap[]> {
Activity activity;
public loaderImages(Activity act){
activity = act;
}
protected Bitmap[] doInBackground(Void... arg0) {
...
return list;
}
...
int countCounter;
protected void onPostExecute(Bitmap[] imagens){
bmps = imagens;
carregaContagem();
final Animation anima = AnimationUtils.loadAnimation(activity, R.anim.counter);
countCounter = 3;
anima.setAnimationListener(new AnimationListener() {
public void onAnimationStart(Animation anim){};
public void onAnimationRepeat(Animation anim){};
public void onAnimationEnd(Animation anim)
{
//here I tried txtCount.clearAnimation() but it doesn't work
countCounter--;
if(countCounter >= 0){
//change the text
if(countCounter > 0){
txtCount.setText("" + countCounter);
}
else{
txtCount.setText("GO!");
}
//start animation again with text changed
txtCount.startAnimation(anim);
}
else{
...
}
};
});
//start animation first time
txtCount.startAnimation(anima);
}
}
}