Question

TextView实现跑马灯效果源码

如题，<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:orientation="vertical">

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello"/>

<LinearLayout
android:layout_height="100.0dp"
android:layout_width="100.0dp"
android:orientation="vertical">

<TextView
android:layout_height="wrap_content"
android:text="谁校对时间，谁就会突然老去。"
android:textAppearance="?android:attr/textAppearanceLarge"
android:layout_width="wrap_content"
scrollHorizontally="true"
marqueeRepeatLimit="marquee_forever"
android:ellipsize="marquee"
android:focusable="true"
android:focusableInTouchMode="true"
android:singleLine="true"/>

</LinearLayout>

</LinearLayout>

我用这个制成了一个小软件，可以跑马灯，但是把它放在其他软件中，跑了几次就不跑了，并且一拉下下拉栏就会停止滚动，

Answer 1

用自定义的TextView
public class AlwaysMarqueeTextView extends TextView {

    public AlwaysMarqueeTextView(Context context) {
        super(context);
        // TODO Auto-generated constructor stub
    }

    public AlwaysMarqueeTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }
    
    public AlwaysMarqueeTextView(Context context, AttributeSet attrs,
            int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    public boolean isFocused() {
        return true;
    }

    @Override
    protected void onFocusChanged(boolean focused, int direction,
            Rect previouslyFocusedRect) {
        if (focused)
            super.onFocusChanged(focused, direction, previouslyFocusedRect);
    }

    @Override
    public void onWindowFocusChanged(boolean focused) {
        if (focused)
            super.onWindowFocusChanged(focused);
    }
}

xml

<com.example.AlwaysMarqueeTextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="10dp"
android:ellipsize="marquee"
android:focusable="true"
android:focusableInTouchMode="true"
android:marqueeRepeatLimit="marquee_forever"
android:singleLine="true"
android:text="这里是天翔灯饰的公告内容....运用文字跑马灯效果....运用文字跑马灯效果....运用文字跑马灯效果....运用文字跑马灯效果....运用文字跑马灯效果....运用文字跑马灯效果" />