android 跑马灯（继承TextView）

来源：互联网发布：j to e开发java模式编辑：程序博客网时间：2024/06/07 19:01
package com.example.administrator.zxqdemo;import android.content.Context;import android.graphics.Canvas;import android.util.AttributeSet;import android.util.Log;import android.view.animation.AccelerateInterpolator;import android.widget.Scroller;import android.widget.TextView;import java.util.List;/** * Created by Administrator on 2016/9/27. */public class RunHorseView extends TextView {    private Scroller mScroller;    public RunHorseView(Context context) {        super(context);    }    public RunHorseView(Context context, AttributeSet attrs) {        super(context, attrs);        mScroller=new Scroller(context,new AccelerateInterpolator());    }    public RunHorseView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        mScroller=new Scroller(context,new AccelerateInterpolator());    }    private List<String> listSource;    private int size;    public  void initSource(List<String> listSource)    {        this.listSource=listSource;        size=listSource.size();    }    String drawText="";    @Override    protected void onDraw(Canvas canvas)    {        this.setText(drawText);        Log.e("dd","ondraw");        super.onDraw(canvas);    }    int index=0;    @Override    public void computeScroll() {        if(mScroller.computeScrollOffset())        {            Log.e("dd","x:"+mScroller.getCurrX()+"y:"+mScroller.getCurrY());            scrollTo(mScroller.getCurrX(),mScroller.getCurrY());            Log.e("dd","compute");            postInvalidate();        }else {            drawText=listSource.get(index);            startScorll();            index++;            index=index%size;        }        super.computeScroll();    }    public void startScorll()    {            int dy=getHeight()-((int)getTextSize())/2;            Log.e("dy","dy:"+dy);            mScroller.startScroll(0,0,0,dy,2000);            Log.e("dd","start");            invalidate();    }}//调用过程RunHorseView runHorseView= (RunHorseView) findViewById(R.id.runHorse);List<String> list=new ArrayList<>();list.add("张三 你中了5000000");list.add("李四 你中了5000000");list.add("王五 你中了5000000");list.add("孙六 你中了5000000");list.add("钱七 你中了5000000");list.add("周八 你中了5000000");runHorseView.initSource(list);runHorseView.startScorll();
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