Android 实现TextView垂直向上滚动（仿向上滚动文字的广告）

配置方法：

project中build.gradle文件内:

allprojects {
          repositories {
             ...
             maven { url "https://jitpack.io" }
          }
       }

module中build.gradle添加依赖:

dependencies {
             compile 'com.github.paradoxie:AutoVerticalTextview:0.1' 
    }

使用方法：

1、自定义view：

package cn.wdf.textview_roll;

import android.content.Context;
import android.graphics.Color;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.View;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.TextSwitcher;
import android.widget.TextView;
import android.widget.ViewSwitcher;
import java.util.ArrayList;



public class VerticalTextview extends TextSwitcher implements ViewSwitcher.ViewFactory {

    private static final int FLAG_START_AUTO_SCROLL = 0;
    private static final int FLAG_STOP_AUTO_SCROLL = 1;

    private float mTextSize = 16;
    private int mPadding = 5;
    private int textColor = Color.GREEN;

    /**
     * @param textSize  字号
     * @param padding   内边距
     * @param textColor 字体颜色
     */
    public void setText(float textSize, int padding, int textColor) {
        mTextSize = textSize;
        mPadding = padding;
        this.textColor = textColor;
    }

    private OnItemClickListener itemClickListener;
    private Context mContext;
    private int currentId = -1;
    private ArrayList textList;
    private Handler handler;

    public VerticalTextview(Context context) {
        this(context, null);
        mContext = context;
    }

    public VerticalTextview(Context context, AttributeSet attrs) {
        super(context, attrs);
        mContext = context;
        textList = new ArrayList();
    }

    public void setAnimTime(long animDuration) {
        setFactory(this);
        Animation in = new TranslateAnimation(0, 0, animDuration, 0);
        in.setDuration(animDuration);
        in.setInterpolator(new AccelerateInterpolator());
        Animation out = new TranslateAnimation(0, 0, 0, -animDuration);
        out.setDuration(animDuration);
        out.setInterpolator(new AccelerateInterpolator());
        setInAnimation(in);
        setOutAnimation(out);
    }

    /**
     * 间隔时间
     *
     * @param time
     */
    public void setTextStillTime(final long time) {
        handler = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                switch (msg.what) {
                    case FLAG_START_AUTO_SCROLL:
                        if (textList.size() > 0) {
                            currentId++;
                            setText(textList.get(currentId % textList.size()));
                        }
                        handler.sendEmptyMessageDelayed(FLAG_START_AUTO_SCROLL, time);
                        break;
                    case FLAG_STOP_AUTO_SCROLL:
                        handler.removeMessages(FLAG_START_AUTO_SCROLL);
                        break;
                }
            }
        };
    }

    /**
     * 设置数据源
     *
     * @param titles
     */
    public void setTextList(ArrayList titles) {
        textList.clear();
        textList.addAll(titles);
        currentId = -1;
    }

    /**
     * 开始滚动
     */
    public void startAutoScroll() {
        handler.sendEmptyMessage(FLAG_START_AUTO_SCROLL);
    }

    /**
     * 停止滚动
     */
    public void stopAutoScroll() {
        handler.sendEmptyMessage(FLAG_STOP_AUTO_SCROLL);
    }

    @Override
    public View makeView() {
        TextView t = new TextView(mContext);
        t.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
        t.setMaxLines(1);
        t.setPadding(mPadding, 0, 0, 0);
        t.setTextColor(textColor);
        t.setTextSize(mTextSize);
        t.setClickable(true);
        t.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                if (itemClickListener != null && textList.size() > 0 && currentId != -1) {
                    itemClickListener.onItemClick(currentId % textList.size());
                }
            }
        });
        return t;
    }

    /**
     * 设置点击事件监听
     *
     * @param itemClickListener
     */
    public void setOnItemClickListener(OnItemClickListener itemClickListener) {
        this.itemClickListener = itemClickListener;
    }

    /**
     * 轮播文本点击监听器
     */
    public interface OnItemClickListener {
        /**
         * 点击回调
         *
         * @param position 当前点击ID
         */
        void onItemClick(int position);
    }

}

2、xml布局：

xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="cn.wdf.textview_roll.MainActivity">

    android:id="@+id/mTv"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#ffff"
    />

3、activity中：

     在这个类中可以设置字体的大小、颜色和内边距。设置每行TextView停留时长间隔，设置进入和退出的时间间隔。

package cn.wdf.textview_roll;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.widget.Toast;

import java.util.ArrayList;


public class MainActivity extends Activity {
    private VerticalTextview TextView;
    private ArrayList titleList= new ArrayList();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        init();

    }

    private void init() {
        TextView=findViewById(R.id.mTv);
        titleList.add("熬过最难熬的那段时间");
        titleList.add("你擦干眼泪终于明白");
        titleList.add("有些人");
        titleList.add("注定是让你成长的");
        titleList.add("正如");
        titleList.add("至尊宝在离开紫霞仙子后");
        titleList.add("才真正成长为孙悟空一样");
        TextView.setTextList(titleList);

        TextView.setText(22, 50, Color.RED);//设置属性
        TextView.setTextStillTime(3000);//设置停留时长间隔
        TextView.setAnimTime(1000);//设置进入和退出的时间间隔
        TextView.setOnItemClickListener(new VerticalTextview.OnItemClickListener() {
            @Override
            public void onItemClick(int position) {
                Toast.makeText(MainActivity.this,"点击了："+titleList.get(position),Toast.LENGTH_SHORT).show();
            }
        });
    }

    @Override
    protected void onResume() {
        super.onResume();
        TextView.startAutoScroll();
    }

    @Override
    protected void onPause() {
        super.onPause();
        TextView.stopAutoScroll();
    }
}