android开发之滑动效果实现图片浏览_ViewFilpper的使用
ViewFilpper 是Android官方提供的一个View容器类,继承于ViewAnimator类,用于实现页面切换,也可以设定时间间隔,让它自动播放。又ViewAnimator继承至于FrameLayout的,所以ViewFilpper的Layout里面可以放置多个View
本示例通过ViewFlipper和GestureDetector.OnGestureListener实现自动播放和手势滑屏事件,先看效果:
滑动前
滑动前 滑动中 滑动后
代码:
[java
package jason.viewfilppertest;
import android.app.Activity;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.Menu;
import android.view.MotionEvent;
import android.view.ViewGroup.LayoutParams;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;
import android.widget.ViewFlipper;
public class MainActivity extends Activity implements
android.view.GestureDetector.OnGestureListener {
private int[] imgs = { R.drawable.img1, R.drawable.img2, R.drawable.img3,
R.drawable.img4, R.drawable.img5 };
private GestureDetector gestureDetector;
private ViewFlipper viewFlipper;
private Activity mActivity;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mActivity = this;
viewFlipper = (ViewFlipper) findViewById(R.id.fliper);
gestureDetector = new GestureDetector(this);
for (int i = 0; i < imgs.length; i++) { // 添加图片源
ImageView iv = new ImageView(this);
iv.setImageResource(imgs[i]);
iv.setScaleType(ImageView.ScaleType.FIT_XY);
viewFlipper.addView(iv, new LayoutParams(LayoutParams.FILL_PARENT,
LayoutParams.FILL_PARENT));
}
viewFlipper.setAutoStart(true); // 设置自动播放功能(点击事件,前自动播放)
viewFlipper.setFlipInterval(3000);
if (viewFlipper.isAutoStart() && !viewFlipper.isFlipping()) {
viewFlipper.startFlipping();
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
// TODO Auto-generated method stub
viewFlipper.stopFlipping(); // 点击事件后,停止自动播放
viewFlipper.setAutoStart(false);
return gestureDetector.onTouchEvent(event); // 注册手势事件
}
@Override
public boolean onDown(MotionEvent arg0) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float arg2,
float arg3) {
if (e2.getX() - e1.getX() > 120) { // 从左向右滑动(左进右出)
Animation rInAnim = AnimationUtils.loadAnimation(mActivity,
R.anim.push_right_in); // 向右滑动左侧进入的渐变效果(alpha 0.1 -> 1.0)
Animation rOutAnim = AnimationUtils.loadAnimation(mActivity,
R.anim.push_right_out); // 向右滑动右侧滑出的渐变效果(alpha 1.0 -> 0.1)
viewFlipper.setInAnimation(rInAnim);
viewFlipper.setOutAnimation(rOutAnim);
viewFlipper.showPrevious();
return true;
} else if (e2.getX() - e1.getX() < -120) { // 从右向左滑动(右进左出)
Animation lInAnim = AnimationUtils.loadAnimation(mActivity,
R.anim.push_left_in); // 向左滑动左侧进入的渐变效果(alpha 0.1 -> 1.0)
Animation lOutAnim = AnimationUtils.loadAnimation(mActivity,
R.anim.push_left_out); // 向左滑动右侧滑出的渐变效果(alpha 1.0 -> 0.1)
viewFlipper.setInAnimation(lInAnim);
viewFlipper.setOutAnimation(lOutAnim);
viewFlipper.showNext();
return true;
}
return true;
}
@Override
public void onLongPress(MotionEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public boolean onScroll(MotionEvent arg0, MotionEvent arg1, float arg2,
补充:移动开发 , Android ,