TextView垂直滚动

代码来源于网络：

TextView垂直滚动

package com.alienjun;

import java.util.ArrayList;
import java.util.List;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Typeface;
import android.os.Handler;
import android.util.AttributeSet;
import android.widget.TextView;

public class VerticalScrollTextView extends TextView{

	
	private Paint mPaint;
	Paint mPathPaint;
	List<Sentence> list;
	int mY=10;
	int index=1;
	float middleY=1;
	float mX=30;
	float DY=30;
	public List<Sentence> getList() {
		return list;
	}
	public void setList(List<Sentence> list) {
		this.list = list;
	}
	public VerticalScrollTextView(Context context) {
		super(context);
		init();
	}
	public VerticalScrollTextView(Context context, AttributeSet attr) {
		super(context, attr);
		init();
	}
	public VerticalScrollTextView(Context context, AttributeSet attr, int i) {
		super(context, attr, i);
		init();
	}
	
	private void init(){
		setFocusable(true);
		//这里主要处理如果没有传入内容显示的默认值
		if(list==null){
			list=new ArrayList<Sentence>();
			Sentence sen=new Sentence(0,"暂时没有通知公告");
			list.add(0, sen);
		}	//普通文字的字号，以及画笔颜色的设置
		mPaint = new Paint();
		mPaint.setAntiAlias(true);
		mPaint.setTextSize(16);
		mPaint.setColor(Color.BLACK);
		mPaint.setTypeface(Typeface.SERIF);		
		//高亮文字的字号，以及画笔颜色的设置
		mPathPaint = new Paint();
		mPathPaint.setAntiAlias(true);
		mPathPaint.setColor(Color.RED);
		mPathPaint.setTextSize(16);
		mPathPaint.setTypeface(Typeface.SANS_SERIF);

		
	}
	
	
	@Override
	protected void onDraw(Canvas canvas) {
		// TODO Auto-generated method stub
		super.onDraw(canvas);
		canvas.drawColor(0xEFeffff);
		Paint p = mPaint;
		Paint p2 = mPathPaint;
		p.setTextAlign(Paint.Align.CENTER);
		if (index == -1)
			return;
		p2.setTextAlign(Paint.Align.CENTER);
		
		canvas.drawText(list.get(index).getName(), mX, middleY, p2);
		float tempY = middleY;
		
		for (int i = index - 1; i >= 0; i--) {			
			tempY = tempY - DY;
			if (tempY < 0) {
				break;
			}
			canvas.drawText(list.get(i).getName(), mX, tempY, p);			
		}
		tempY = middleY;
	
		for (int i = index + 1; i < list.size(); i++) {			
			tempY = tempY + DY;
			if (tempY > mY) {
				break;
			}
			canvas.drawText(list.get(i).getName(), mX, tempY, p);			
		}

	}
	
	protected void onSizeChanged(int w, int h, int ow, int oh) {
		super.onSizeChanged(w, h, ow, oh);
		mX = w * 0.5f; 
		mY = h;
		middleY = h * 0.5f;
	}

	private long updateIndex(int index) {	
		if (index == -1)
			return -1;
		this.index=index;		
		return index;
	}
	
	
	
	public void updateUI(){
		new Thread(new updateThread()).start();
	}
	
	class updateThread implements Runnable {
		long time = 1000;
		int i=0;
		public void run() {
			while (true) {
				long sleeptime = updateIndex(i);
				time += sleeptime;
				mHandler.post(mUpdateResults);
				if (sleeptime == -1)
					return;
				try {
					Thread.sleep(time);
					i++;
					if(i==getList().size())
						i=0;
				} catch (InterruptedException e) {					
					e.printStackTrace();
				}
			}
		}
	}
	Handler mHandler = new Handler();
	Runnable mUpdateResults = new Runnable() {
		public void run() {
			invalidate(); 
		}
	};


}

XML布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:orientation="vertical">
  
  
  <com.alienjun.VerticalScrollTextView
		android:id="@+id/sampleView1"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
		android:background="@drawable/selector"

  />
  
</LinearLayout>

//model

package com.alienjun;

public class Sentence {
	private int id;
	public Sentence(int id, String name) {
		super();
		this.id = id;
		this.name = name;
	}
	private String name;
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
}

Activity：

package com.alienjun;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;

public class VerticalScrollTextActivity extends Activity{
	VerticalScrollTextView mSampleView;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.test);
		
		mSampleView = (VerticalScrollTextView) findViewById(R.id.sampleView1);
		List<Sentence> lst=new ArrayList<Sentence>();
		for(int i=0;i<30;i++){
			if(i%2==0){
				Sentence sen=new Sentence(i,i+"、金球奖三甲揭晓 C罗梅西哈维入围 ");
				lst.add(i, sen);
			}else{
				Sentence sen=new Sentence(i,i+"、公牛欲用三大主力换魔兽？？？？");
				lst.add(i, sen);
			}
		}	
		//给View传递数据
		mSampleView.setList(lst);
		//更新View
		mSampleView.updateUI();		

		
	}

}

评论

3 楼 lenomon 2012-04-07  

alienjun 写道

lenomon 写道

这篇文章说了几个方法可以看看 android自定义View-垂直滚动的TextView

好！~

谢谢，多多关注我的博客

这里有个关于垂直滚动的方法汇总：android垂直自动滚动

2 楼 alienjun 2012-03-20  

lenomon 写道

这篇文章说了几个方法可以看看 android自定义View-垂直滚动的TextView

好！~

1 楼 lenomon 2012-03-11  

这篇文章说了几个方法可以看看 android自定义View-垂直滚动的TextView