Android-垂直上下滚动的TextView

来自：https://github.com/paradoxie/AutoVerticalTextview
参考博客：Android-实现上下滚动的textview

相关类的继承关系：

public class View implements Drawable.Callback, KeyEvent.Callback,
        AccessibilityEventSource {...}


public abstract class ViewGroup extends View implements ViewParent, ViewManager {...}


public class FrameLayout extends ViewGroup {...}


public class ViewAnimator extends FrameLayout {...}


public class ViewSwitcher extends ViewAnimator {...}


public class TextSwitcher extends ViewSwitcher {...}

1、自定义view：

package com.example.lenovo.myapplication.textviewtop;

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 com.example.lenovo.myapplication.R;

import java.util.ArrayList;
import java.util.Timer;
import java.util.TimerTask;

/**
 * Created by lenovo on 2017/7/5.
 */

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.BLACK;

    /**
     * @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, mPadding, mPadding, mPadding);
        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、布局：

   <com.example.lenovo.myapplication.textviewtop.VerticalTextview
        android:id="@+id/text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

3、使用：

package com.example.lenovo.myapplication.activity;

import android.graphics.Color;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.widget.Toast;

import com.example.lenovo.myapplication.R;
import com.example.lenovo.myapplication.textviewtop.VerticalTextview;
import com.squareup.leakcanary.RefWatcher;

import java.lang.ref.WeakReference;
import java.util.ArrayList;

/**
 * Created by lenovo on 2017/7/4.
 */

public class MainActivityII extends AppCompatActivity {

    private VerticalTextview TextView;
    private ArrayList titleList = new ArrayList();

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        init();
    }

    private void init() {
        TextView = (VerticalTextview) findViewById(R.id.text);
        titleList.add("你是天上最受宠的一架钢琴");
        titleList.add("我是丑人脸上的鼻涕");
        titleList.add("你发出完美的声音");
        titleList.add("我被默默揩去");
        titleList.add("你冷酷外表下藏着诗情画意");
        titleList.add("我已经够胖还吃东西");
        titleList.add("你踏着七彩祥云离去");
        titleList.add("我被留在这里");
        TextView.setTextList(titleList);
        TextView.setText(26, 5, Color.RED);//设置属性
        TextView.setTextStillTime(3000);//设置停留时长间隔
        TextView.setAnimTime(300);//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(MainActivityII.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();
    }

}