Android UI开发第八篇——ViewFlipper 左右滑动效果

怎么实现Android主页面的左右拖动效果。其实实现起来很简单，就是使用ViewFlipper来将您要来回拖动的View装在一起，然后与GestureDetector手势识别类来联动，确定要显示哪个View，加上一点点动画效果即可。

java code：

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(addView(R.layout.layout1));

flipper.addView(addView(R.layout.layout2));

flipper.addView(addView(R.layout.layout3));

flipper.addView(addView(R.layout.layout4));

}

private View addView(int layout) {

LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);

View view = inflater.inflate(layout, null);

return view;

}

@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();

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;

}

}

xml code:

<?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/ViewFlipper01"

android:layout_width="fill_parent" android:layout_height="fill_parent">

</ViewFlipper>

</LinearLayout>

http://www.devdiv.com/home.php?mod=space&uid=14682&do=blog&id=3869

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* @author 张兴业
* 邮箱：[e-mail]
* qq:363302850
*
*/