Android通过手势实现答题器翻页效果

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package com.lidong.demo.view;import android.os.Bundle;import android.view.GestureDetector;import android.view.MotionEvent;import android.view.View;import android.view.animation.Animation;import android.view.animation.AnimationUtils;import android.widget.AdapterView;import android.widget.ListView;import android.widget.TextView;import android.widget.Toast;import android.widget.ViewFlipper;import com.lidong.demo.AppComponent;import com.lidong.demo.BaseActivity;import com.lidong.demo.R;import com.lidong.demo.view.adapter.ChineseMedicineReportAdapter;import com.lidong.demo.view.model.Question;import java.util.ArrayList;import java.util.List;import butterknife.Bind;import butterknife.ButterKnife;/***@类名 : GestureFilpActivity*@描述 : *@时间 : 2016/5/3 16:11*@作者: 李东*@邮箱 : lidong@chni.com.cn*@company: chni*/public class GestureFilpActivity extends BaseActivity implements GestureDetector.OnGestureListener{ @Bind(R.id.viewFlipper) ViewFlipper mViewFlipper; //1.定义手势检测器对象 GestureDetector mGestureDetector; //2.定义一个动画数组，用于为ViewFilpper指定切换动画效果。 Animation[] animations = new Animation[4]; //3.定义手势两点之间的最小距离 final int FLIP_DISTANCE = 50 ; List<Question> mQuestion = new ArrayList<>(); ChineseMedicineReportAdapter adapter; @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_gesture_filp);  ButterKnife.bind(this);  setActivityTitle("答题器的实现");  //1.构建手势检测器  mGestureDetector = new GestureDetector(this,this);  //2准备数据  List<Question> questions = initData();  mQuestion.addAll(questions);  //3.为ViewFilpper添加子控件。  for (int i = 0;i<mQuestion.size();i++){   Question question = mQuestion.get(i);   mViewFlipper.addView(addQuestionView(question));  }  //4.初始化Animation数组  animations[0] = AnimationUtils.loadAnimation(this,R.anim.left_in);  animations[1] = AnimationUtils.loadAnimation(this,R.anim.left_out);  animations[2] = AnimationUtils.loadAnimation(this,R.anim.right_in);  animations[3] = AnimationUtils.loadAnimation(this,R.anim.right_out); } @Override protected void setupActivityComponent(AppComponent appComponent) { } private View addQuestionView(Question question){  View view = View.inflate(this, R.layout.activity_chnihealthreport, null);  TextView tes = (TextView) view.findViewById(R.id.tv_question);  ListView listview = (ListView) view.findViewById(R.id.lv_question_answer);  adapter = new ChineseMedicineReportAdapter(this,question);  listview.setAdapter(adapter);  tes.setText(question.getQuestion());  listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {   @Override   public void onItemClick(AdapterView<?> parent, View view, int position, long id) {    Toast.makeText(GestureFilpActivity.this,position+"",Toast.LENGTH_SHORT).show();    Toast.makeText(GestureFilpActivity.this,position+"",Toast.LENGTH_SHORT).show();    if (mViewFlipper.getDisplayedChild() == mQuestion.size() - 1) {     Toast.makeText(GestureFilpActivity.this,"最后一个题",Toast.LENGTH_SHORT).show();     mViewFlipper.stopFlipping();     return;    }else {     mViewFlipper.setInAnimation(animations[0]);     mViewFlipper.setOutAnimation(animations[1]);     mViewFlipper.showNext();    }   }  });  return view; } @Override public boolean onDown(MotionEvent e) {  return false; } @Override public void onShowPress(MotionEvent e) { } @Override public boolean onSingleTapUp(MotionEvent e) {  return false; } @Override public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {  return false; } @Override public void onLongPress(MotionEvent e) { }  //重点实现在这里切换 @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {  if (e2.getX() - e1.getX()>FLIP_DISTANCE){   if (mViewFlipper.getDisplayedChild() == 0) {    mViewFlipper.stopFlipping();    Toast.makeText(GestureFilpActivity.this,"第一个题",Toast.LENGTH_SHORT).show();    return false;   } else {    mViewFlipper.setInAnimation(animations[2]);    mViewFlipper.setOutAnimation(animations[3]);    mViewFlipper.showPrevious();    return true;   }  }else if (e1.getX() - e2.getX()>FLIP_DISTANCE){   if (mViewFlipper.getDisplayedChild() == mQuestion.size() - 1) {    Toast.makeText(GestureFilpActivity.this,"最后一个题",Toast.LENGTH_SHORT).show();    mViewFlipper.stopFlipping();    return false;   }else {    mViewFlipper.setInAnimation(animations[0]);    mViewFlipper.setOutAnimation(animations[1]);    mViewFlipper.showNext();    return true;   }  }  return false; } @Override public boolean onTouchEvent(MotionEvent event) {  //将Activity上的触发的事件交个GestureDetector处理  return this.mGestureDetector.onTouchEvent(event); } private List<Question> initData(){  List<Question> questions = new ArrayList<>();  Question q1 = new Question();  q1.setQuestion("1、/"红娘/"由来是出自下列哪部古典名剧:");  List<Question.Answer> mA = new ArrayList<>();  Question.Answer a1 = new Question.Answer();  a1.setAnswerMessage("A《琵琶记》");  Question.Answer a2 = new Question.Answer();  a2.setAnswerMessage("B《西厢记》");  Question.Answer a3 = new Question.Answer();  a3.setAnswerMessage("C《长生殿》");  Question.Answer a4 = new Question.Answer();  a4.setAnswerMessage("D《桃花扇》");  mA.add(a1);  mA.add(a2);  mA.add(a3);  mA.add(a4);  q1.setAnswer(mA);  questions.add(q1);  Question q2 = new Question();  q2.setQuestion("2.我国第一部有声影片是：");  List<Question.Answer> mB = new ArrayList<>();  Question.Answer b1 = new Question.Answer();  b1.setAnswerMessage("A《歌女红牡丹》");  Question.Answer b2 = new Question.Answer();  b2.setAnswerMessage("B《定军山》");  Question.Answer b3 = new Question.Answer();  b3.setAnswerMessage("C《林则徐》");  Question.Answer b4 = new Question.Answer();  b4.setAnswerMessage("D《玉人何处》");  mB.add(b1);  mB.add(b2);  mB.add(b3);  mB.add(b4);  q2.setAnswer(mB);  questions.add(q2);  Question q3= new Question();  q3.setQuestion("3.下列哪座山不属于我国四大佛山之一：（ A）");  List<Question.Answer> mC = new ArrayList<>();  Question.Answer c1 = new Question.Answer();  c1.setAnswerMessage("A《歌女红牡丹》");  Question.Answer c2 = new Question.Answer();  c2.setAnswerMessage("B《定军山》");  Question.Answer c3 = new Question.Answer();  c3.setAnswerMessage("C《林则徐》");  Question.Answer c4 = new Question.Answer();  c4.setAnswerMessage("D《玉人何处》");  mC.add(c1);  mC.add(c2);  mC.add(c3);  mC.add(c4);  q3.setAnswer(mC);  questions.add(q3);  Question q4 = new Question();  q4.setQuestion("4.下面哪个是对“惊蛰”这个节气的正确描述？");  List<Question.Answer> mD = new ArrayList<>();  Question.Answer d1 = new Question.Answer();  d1.setAnswerMessage("A《歌女红牡丹》");  Question.Answer d2 = new Question.Answer();  d2.setAnswerMessage("B《定军山》");  Question.Answer d3 = new Question.Answer();  d3.setAnswerMessage("C《林则徐》");  Question.Answer d4 = new Question.Answer();  d4.setAnswerMessage("D《玉人何处》");  mD.add(d1);  mD.add(d2);  mD.add(d3);  mD.add(d4);  q4.setAnswer(mD);  questions.add(q4);  return questions; }}