Android ViewFlipper簡單用法解析_Android

ViewFlipper和ViewPager挺像的，都是一個view容器。內部可以添加多個view，只是viewpager可以通過左右滑動來切換view，而viewFlipper則沒有這個功能，所以需要在它上面監聽手勢。比較方便的是它不用使用適配器就能添加view，所以比較方便。

 

首先在布局檔案中定義這個控制項： 

<?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.在代碼中找到並且添加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，這裡添加5個textView    flipper.addView(addTextView("page 2"));    flipper.addView(addTextView("page 3"));    flipper.addView(addTextView("page 4"));    flipper.addView(addTextView("page 5"));  }/**   * @param text   * @return 一個textView對象   */  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.通過touch監聽手勢來切換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();//切換到下一個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的完整代碼： 

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，這裡添加5個textView    flipper.addView(addTextView("page 2"));    flipper.addView(addTextView("page 3"));    flipper.addView(addTextView("page 4"));    flipper.addView(addTextView("page 5"));  }  /**   * @param text   * @return 一個textView對象   */  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();//切換到下一個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 自動產生的方法存根      }  @Override  public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,      float distanceY) {    // TODO 自動產生的方法存根    return false;  }  @Override  public void onShowPress(MotionEvent e) {    // TODO 自動產生的方法存根      }  @Override  public boolean onSingleTapUp(MotionEvent e) {    // TODO 自動產生的方法存根    return false;  }}

動畫檔案： 

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>

源碼下載：http://xiazai.jb51.net/201609/yuanma/AndroidViewFlip(jb51.net).rar

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