Android實現左右滑動效果

來源:互聯網
上載者:User

  本樣本示範在Android中實現圖片左右滑動效果。

 

  關於滑動效果,在Android中用得比較多,本樣本實現的滑動效果是使用ViewFlipper來實現的,當然也可以使用其它的View來實現。接下來就讓我們開始實現這種效果。為了方便大家理解,我們先來看一下:

 

  主要如:

 

    

 

  接下來我們看一下程式結構圖:

 

  

 

  MainActivity檔案中代碼:

package com.android.flip;import android.app.Activity;import android.os.Bundle;import android.view.GestureDetector;import android.view.MotionEvent;import android.view.View;import android.view.GestureDetector.OnGestureListener;import android.view.animation.AnimationUtils;import android.widget.ImageView;import android.widget.ViewFlipper;/** * Android實現左右滑動效果 * @Description: Android實現左右滑動效果 * @File: MainActivity.java * @Package com.android.flip * @Author Hanyonglu * @Date 2012-02-12 上午10:44:04 * @Version V1.0 */public class MainActivity 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.ViewFlipper1);        flipper.addView(addImageView(R.drawable.one));        flipper.addView(addImageView(R.drawable.two));        flipper.addView(addImageView(R.drawable.three));        flipper.addView(addImageView(R.drawable.four));        flipper.addView(addImageView(R.drawable.five));    }        private View addImageView(int id) {        ImageView iv = new ImageView(this);        iv.setImageResource(id);        return iv;    }        @Override    public boolean onTouchEvent(MotionEvent event) {        // TODO Auto-generated method stub        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();            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 Auto-generated method stub            }        @Override    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,            float distanceY) {        // TODO Auto-generated method stub        return false;    }        @Override    public void onShowPress(MotionEvent e) {        // TODO Auto-generated method stub            }        @Override    public boolean onSingleTapUp(MotionEvent e) {        // TODO Auto-generated method stub        return false;    }}

 

  布局介面相對比較簡單,我們只需要加入ViewFlipper就可以,代碼如下: 

<?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"
    >    <ViewFlipper android:id="@+id/ViewFlipper1"
        android:layout_width="fill_parent" 
        android:layout_height="fill_parent">
    </ViewFlipper>

</LinearLayout> 

 

  為了使其滑動時有一定的特效,我們需要加入Animation效果,說到Animation,我們先看下如何在Android中實現自訂Animation。自訂的Animation是以XML格式定義的,定義好的XML檔案存放在res/anim中。

 

  一般的Animation有以下四種類型:

  1. Alpha:漸層透明度動畫效果

  2. Scale:漸層尺寸伸縮動畫效果

  3. Translate:畫面轉換位置移動動畫效果

  4. Rotate:畫面轉換位置移動動畫效果

 

  push_left_in.xml檔案中代碼:

<?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檔案中代碼: 

 <?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檔案中代碼:

<?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檔案中代碼:

<?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>  

 

  如果大家想實現帶指引效果的左右滑動,請訪問博文:http://www.cnblogs.com/hanyonglu/archive/2012/04/07/2435589.html 

 

  如果想實現帶漸顯按鈕的左右滑動效果,請訪問博文:http://www.cnblogs.com/hanyonglu/archive/2012/02/13/2350171.html

 

  :點擊下載

 

  最後,希望轉載的朋友能夠尊重作者的勞動成果,加上轉載地址:http://www.cnblogs.com/hanyonglu/archive/2012/02/13/2349827.html 謝謝。 

  

  結束。^_^

 

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