android自带的跑马灯是必须在有焦点的情况下才会滚动,一旦失去焦点跑马灯就会失去效果。
现在我的做法是自定义TextView 并重写isFocused和onFocusChanged方法,设置focused为true,这样TextView就可以始终获取到焦点
亲测可用!
1。自定义TextView:
import android.content.Context;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.ViewDebug.ExportedProperty;
import android.widget.TextView;
public class ScrollForeverTextView extends TextView
{
public ScrollForeverTextView(Context context)
{
super(context);
// TODO Auto-generated constructor stub
}
public ScrollForeverTextView(Context context, AttributeSet attrs,
int defStyle)
{
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
public ScrollForeverTextView(Context context, AttributeSet attrs)
{
super(context, attrs);
// TODO Auto-generated constructor stub
}
@Override
@ExportedProperty(category = "focus")
public boolean isFocused()
{
// TODO Auto-generated method stub
return true;//重点
}
@Override
protected void onFocusChanged(boolean focused, int direction,
Rect previouslyFocusedRect)
{
// TODO Auto-generated method stub
super.onFocusChanged(true, direction, previouslyFocusedRect);//重点
}
}
2。xml中引用:
<。。。.view.ScrollForeverTextView
android:id="@+id/title"
style="@style/shadow5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:ellipsize="marquee"
android:focusable="true"
android:focusableInTouchMode="true"
android:marqueeRepeatLimit="marquee_forever"
android:maxEms="8"
android:scrollHorizontally="true"
android:singleLine="true"
android:text=""
android:textColor="@color/white"
android:textSize="@dimen/text_size_18" />