Android文字广告（Textview上下滚动），使用TextSwitcher控件的完整实现

实现步骤：

a、xml布局

<TextSwitcherandroid:id="@+id/textSwitcher"android:layout_width="match_parent"android:layout_height="wrap_content"android:padding="8dp" />

b、TextSwitchBanner.java

import android.content.Context;
import android.graphics.Color;
import android.os.Handler;
import android.text.TextUtils;
import android.view.Gravity;
import android.view.View;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.TranslateAnimation;
import android.widget.TextSwitcher;
import android.widget.TextView;
import android.widget.ViewSwitcher;import java.util.List;/*** 结合TextSwitcher空间实现文字广告，轮播*/
public class TextSwitchBanner implements ViewSwitcher.ViewFactory, View.OnClickListener {private Context context;private TextSwitcher textSwitcher;private List<String> texts;private OnItemClickLitener listener;private int marker;private AnimationSet InAnimationSet;private AnimationSet OutAnimationSet;private int delayTime = 2000;private static final int DURATION = 1000;private Handler handler = new Handler();private Runnable task = new Runnable() {@Overridepublic void run() {nextView();handler.postDelayed(task, delayTime * 2);}};public TextSwitchBanner(Context context, TextSwitcher textSwitcher) {this.context = context;this.textSwitcher = textSwitcher;init();}private void init() {textSwitcher.setFactory(this);textSwitcher.setText("");createAnimation();textSwitcher.setInAnimation(InAnimationSet);textSwitcher.setOutAnimation(OutAnimationSet);textSwitcher.setOnClickListener(this);}@Overridepublic View makeView() {TextView textView = new TextView(context);textView.setGravity(Gravity.START);textView.setSingleLine(true);textView.setGravity(Gravity.CENTER_VERTICAL);textView.setEllipsize(TextUtils.TruncateAt.END);textView.setTextColor(Color.BLACK);return textView;}@Overridepublic void onClick(View v) {if(listener != null && texts != null && texts.size() != 0){listener.onClick(texts, marker);}}public void update(List<String> list){if(list == null || list.size() == 0){return;}stop();texts = list;marker = 0;textSwitcher.setText(texts.get(0));start();}public void start() {stop();handler.postDelayed(task, delayTime);}public void stop(){handler.removeCallbacks(task);}public int getMarker() {return marker;}public TextSwitchBanner setTexts(List<String> texts) {this.texts = texts;return this;}public void setDelayTime(int delayTime) {this.delayTime = delayTime;}private void createAnimation() {AlphaAnimation alphaAnimation;TranslateAnimation translateAnimation;int h = textSwitcher.getHeight();if (h <= 0) {textSwitcher.measure(0,0);h = textSwitcher.getMeasuredHeight();}InAnimationSet = new AnimationSet(true);OutAnimationSet = new AnimationSet(true);alphaAnimation = new AlphaAnimation(0,1);translateAnimation = new TranslateAnimation(Animation.ABSOLUTE, 0, Animation.ABSOLUTE, 0,Animation.ABSOLUTE, h, Animation.ABSOLUTE, 0);InAnimationSet.addAnimation(alphaAnimation);InAnimationSet.addAnimation(translateAnimation);InAnimationSet.setDuration(DURATION);alphaAnimation = new AlphaAnimation(1,0);translateAnimation = new TranslateAnimation(Animation.ABSOLUTE, 0, Animation.ABSOLUTE, 0,Animation.ABSOLUTE, 0, Animation.ABSOLUTE, -h);OutAnimationSet.addAnimation(alphaAnimation);OutAnimationSet.addAnimation(translateAnimation);OutAnimationSet.setDuration(DURATION);}private void nextView() {marker = ++marker % texts.size();textSwitcher.setText(texts.get(marker));}public interface OnItemClickLitener{void onClick(List<String> list, int position);}public void setOnItemClickListener(OnItemClickLitener listener){this.listener = listener;}}

c、MainActivity.java

private TextSwitcher m_textSwitcher;

m_textSwitcher = m_view.findViewById(R.id.textSwitcher);

/*** 初始化textbanner*/private void initTextBanner() {m_textSwitchBanner = new TextSwitchBanner(getActivity(), m_textSwitcher);m_textSwitchBanner.setOnItemClickListener(new TextSwitchBanner.OnItemClickLitener() {@Overridepublic void onClick(List<String> list, int position) {ToastUtils.s(getActivity(), "click: " + position);}});}

/*** 更新文字广告*/private void updateTextViewBanner() {List<String> list = new ArrayList<>();for (int i = 0; i < m_listMsgInfo.size(); i++) {list.add(m_listMsgInfo.get(i).getTitle());}m_textSwitchBanner.update(list);}

完！！！