Android使用ViewFlipper做页面切换,与手势滑动切换的使用

来源:互联网 发布:遥感卫星数据 编辑:程序博客网 时间:2024/06/06 03:37
 Android系统自带有一个多页面管理的控件:ViewFlipper.

它可以简单实现子页面的切换,,,

它只需使用addView方法添加几个View,每个View对应的是一个页面,即可完成对于多页面的管理,,,

在android上实现手势的识别也比较简单,可以实现OnTouchListener和OnGuestureListener接口,

然后在OnTouch函数中注册GestureDetector来判别手势动作,

参考一位大牛的文章:

http://wang-peng1.iteye.com/blog/572886

GestureDetector.OnGestureListener:用来通知普通的手势事件,该接口有如下六个回调函数:
1.   onDown(MotionEvent e):down事件;
2.   onSingleTapUp(MotionEvent e):一次点击up事件;
3.   onShowPress(MotionEvent e):down事件发生而move或则up还没发生前触发该事件;
4.   onLongPress(MotionEvent e):长按事件;
5.   onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY):滑动手势事件;
6.   onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY):在屏幕上拖动事件。

主要判断是在onFling()函数里面,e1表示开始按下去的位置信息,e2表示抬起时的位置信息,因此可以通过它们在x轴上面 的距离差来是左滑还是右滑。。。

public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,          float velocityY) {      // TODO Auto-generated method stub       if (e2.getX()-e1.getX() > 100) {          // fling right           showNextView();      } else if (e1.getX() - e2.getX() > 100) {          // fling left           showPreviousView();      }      return false;  }  

资源文件:

<?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">  <LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="horizontal"    android:layout_width="fill_parent"    android:layout_height="wrap_content">      <Button        android:id="@+id/btnPrev"        android:text="Previous"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />      <Button        android:id="@+id/btnNext"        android:text="Next"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />  </LinearLayout>  <ViewFlipper     android:id="@+id/vfFlingTest"     android:layout_width="fill_parent"     android:layout_height="fill_parent"></ViewFlipper>  </LinearLayout> 

代码:

import android.app.Activity;  import android.os.Bundle;  import android.view.GestureDetector;  import android.view.KeyEvent;  import android.view.MotionEvent;  import android.view.View;  import android.view.GestureDetector.OnGestureListener;  import android.view.View.OnClickListener;  import android.view.View.OnTouchListener;  import android.view.ViewGroup.LayoutParams;  import android.view.animation.AnimationUtils;  import android.widget.Button;  import android.widget.EditText;  import android.widget.ImageView;  import android.widget.TextView;  import android.widget.ViewFlipper;  public class FlingTest extends Activity implements              OnTouchListener, OnGestureListener{      private Button btnPrev;      private Button btnNext;      private ViewFlipper vfFlingTest;            private TextView tvFlipper;      private EditText etFlipper;      private ImageView ivFlipper;            private GestureDetector mGestureDetector;            @Override      protected void onCreate(Bundle savedInstanceState) {          // TODO Auto-generated method stub           super.onCreate(savedInstanceState);          setContentView(R.layout.fling_test);                    btnPrev = (Button)findViewById(R.id.btnPrev);          btnNext = (Button)findViewById(R.id.btnNext);          vfFlingTest = (ViewFlipper)findViewById(R.id.vfFlingTest);                    initViews();                    vfFlingTest.addView(tvFlipper);          vfFlingTest.addView(etFlipper);          vfFlingTest.addView(ivFlipper);                    vfFlingTest.setOnTouchListener(this);          vfFlingTest.setLongClickable(true);          mGestureDetector = new GestureDetector(this);                    btnPrev.setOnClickListener(new OnClickListener() {                            public void onClick(View v) {                  // TODO Auto-generated method stub                   showPreviousView();              }          });                    btnNext.setOnClickListener(new OnClickListener() {                            public void onClick(View v) {                  // TODO Auto-generated method stub                   showNextView();              }          });      }            public void showPreviousView() {          vfFlingTest.setInAnimation(AnimationUtils.loadAnimation(                  this, R.anim.right_in));          vfFlingTest.setOutAnimation(AnimationUtils.loadAnimation(                  this, R.anim.left_out));          vfFlingTest.showPrevious();      }            public void showNextView() {          vfFlingTest.setInAnimation(AnimationUtils.loadAnimation(                  this, R.anim.left_in));          vfFlingTest.setOutAnimation(AnimationUtils.loadAnimation(                  this, R.anim.right_out));          vfFlingTest.showNext();      }            private void initViews() {          tvFlipper = new TextView(this);          tvFlipper.setText("this is a text view!");                    etFlipper = new EditText(this);          etFlipper.setText("this is a text view!");                    ivFlipper = new ImageView(this);          ivFlipper.setLayoutParams(new LayoutParams(                  LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));          ivFlipper.setImageResource(R.drawable.pic1);      }      @Override      protected void onDestroy() {          // TODO Auto-generated method stub           android.os.Process.killProcess(android.os.Process.myPid());          super.onDestroy();      }      @Override      public boolean onKeyDown(int keyCode, KeyEvent event) {          // TODO Auto-generated method stub           if (keyCode == KeyEvent.KEYCODE_BACK) {              finish();              return true;          }          return super.onKeyDown(keyCode, event);      }      public boolean onTouch(View view, MotionEvent event) {          // TODO Auto-generated method stub           return mGestureDetector.onTouchEvent(event);      }        public boolean onDown(MotionEvent arg0) {          // TODO Auto-generated method stub           return false;      }      public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,              float velocityY) {          // TODO Auto-generated method stub           if (e2.getX()-e1.getX() > 100) {              // fling right               showNextView();          } else if (e1.getX() - e2.getX() > 100) {              // fling left               showPreviousView();          }          return false;      }      public void onLongPress(MotionEvent e) {          // TODO Auto-generated method stub                 }      public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,              float distanceY) {          // TODO Auto-generated method stub           return false;      }      public void onShowPress(MotionEvent e) {          // TODO Auto-generated method stub                 }      public boolean onSingleTapUp(MotionEvent e) {          // TODO Auto-generated method stub           return false;      }  }  

还有就是一个页面切换的简单动画效果(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" />   </set> 

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" />   </set> 

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" />   </se

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" />   </set>  
原创粉丝点击