Android ViewFlipper简单用法解析

2019-12-12 05:11:53

字体：大中小

来源：转载

供稿：网友

ViewFlipper和ViewPager挺像的，都是一个view容器。内部可以添加多个view，只是viewpager可以通过左右滑动来切换view，而viewFlipper则没有这个功能，所以需要在它上面监听手势。比较方便的是它不用使用适配器就能添加view，所以比较方便。

首先在布局文件中定义这个控件：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:orientation="vertical"  android:layout_width="fill_parent"  android:layout_height="fill_parent"  android:background="#ffffff">    <ViewFlipper android:id="@+id/ViewFlipper01"    android:layout_width="match_parent"     android:layout_height="match_parent"/>  </LinearLayout>

2.在代码中找到并且添加view

  @Override  public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.main);    detector = new GestureDetector(this);    flipper = (ViewFlipper) this.findViewById(R.id.ViewFlipper01);    flipper.addView(addTextView("page 1"));//添加view到flipper中，这里添加5个textView    flipper.addView(addTextView("page 2"));    flipper.addView(addTextView("page 3"));    flipper.addView(addTextView("page 4"));    flipper.addView(addTextView("page 5"));  }/**   * @param text   * @return 一个textView对象   */  private View addTextView(String text) {    TextView tv = new TextView(this);    tv.setText(text);    tv.setTextSize(40);    tv.setTextColor(0xff000000);    tv.setGravity(Gravity.CENTER);    return tv;  }

3.通过touch监听手势来切换view

@Override  public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,      float velocityY) {    if (e1.getX() - e2.getX() > 120) {      this.flipper.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_in));      this.flipper.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_out));      this.flipper.showNext();//切换到下一个view      return true;    } else if (e1.getX() - e2.getX() < -120) {      this.flipper.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.push_right_in));      this.flipper.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.push_right_out));      this.flipper.showPrevious();      return true;    }    return false;  }

下面是Activity的完整代码：

package com.xu81.testflip;import android.app.Activity;import android.app.ActivityManager.RecentTaskInfo;import android.os.Bundle;import android.view.GestureDetector;import android.view.Gravity;import android.view.MotionEvent;import android.view.View;import android.view.GestureDetector.OnGestureListener;import android.view.animation.AnimationUtils;import android.widget.TextView;import android.widget.ViewFlipper;public class TestFlip extends Activity implements OnGestureListener {  private ViewFlipper flipper;  private GestureDetector detector;  /** Called when the activity is first created. */  @Override  public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.main);    detector = new GestureDetector(this);    flipper = (ViewFlipper) this.findViewById(R.id.ViewFlipper01);    flipper.addView(addTextView("page 1"));//添加view到flipper中，这里添加5个textView    flipper.addView(addTextView("page 2"));    flipper.addView(addTextView("page 3"));    flipper.addView(addTextView("page 4"));    flipper.addView(addTextView("page 5"));  }  /**   * @param text   * @return 一个textView对象   */  private View addTextView(String text) {    TextView tv = new TextView(this);    tv.setText(text);    tv.setTextSize(40);    tv.setTextColor(0xff000000);    tv.setGravity(Gravity.CENTER);    return tv;  }  @Override  public boolean onTouchEvent(MotionEvent event) {    return this.detector.onTouchEvent(event);  }  @Override  public boolean onDown(MotionEvent e) {    // TODO Auto-generated method stub    return false;  }  @Override  public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,      float velocityY) {    if (e1.getX() - e2.getX() > 120) {      this.flipper.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_in));      this.flipper.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_out));      this.flipper.showNext();//切换到下一个view      return true;    } else if (e1.getX() - e2.getX() < -120) {      this.flipper.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.push_right_in));      this.flipper.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.push_right_out));      this.flipper.showPrevious();      return true;    }    return false;  }  @Override  public void onLongPress(MotionEvent e) {    // TODO 自动生成的方法存根      }  @Override  public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,      float distanceY) {    // TODO 自动生成的方法存根    return false;  }  @Override  public void onShowPress(MotionEvent e) {    // TODO 自动生成的方法存根      }  @Override  public boolean onSingleTapUp(MotionEvent e) {    // TODO 自动生成的方法存根    return false;  }}

动画文件：

push_left_in.xml

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android">  <translate android:fromXDelta="100%p" android:toXDelta="0"    android:duration="500" />  <alpha android:fromAlpha="0.1" android:toAlpha="1.0"    android:duration="500" /></set>

push_left_out.xml

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android">  <translate android:fromXDelta="0" android:toXDelta="-100%p"    android:duration="500" />  <alpha android:fromAlpha="1.0" android:toAlpha="0.1"    android:duration="500" /></set>

push_right_in.xml

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android">  <translate android:fromXDelta="-100%p" android:toXDelta="0"    android:duration="500" />  <alpha android:fromAlpha="0.1" android:toAlpha="1.0"    android:duration="500" /></set>

push_right_out.xml

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android">  <translate android:fromXDelta="0" android:toXDelta="100%p"    android:duration="500" />  <alpha android:fromAlpha="1.0" android:toAlpha="0.1"    android:duration="500" /></set>

源码下载：http://xiazai.VeVB.COm/201609/yuanma/AndroidViewFlip(VeVB.COm).rar

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持武林网。

上一篇：Android7.0 MessageQueue详解

下一篇：Android开源项目PullToRefresh下拉刷新功能详解2