本文实例讲述了Android编程实现左右滑动切换背景的方法。分享给大家供大家参考，具体如下：
最近想做一个左右滑动切换背景图片的应用，特地将自己的研究分享一下：
这个需要继承2个监听接口 OnGestureListener, OnTouchListener
关于这2个接口大家可以在网上查一下
同时需要设置2个属性
bgLayout.setOnTouchListener(this); bgLayout.setLongClickable(true);
并且在这个函数中有如下这几句话
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
return this.mGesture.onTouchEvent(event);
}
附送代码：
public class SwitcherActivity extends Activity implements OnGestureListener,
OnTouchListener {
/** Called when the activity is first created. */
LinearLayout bgLayout = null;
private GestureDetector mGesture = null;
private int flag = 3;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mGesture = new GestureDetector(this);
bgLayout = (LinearLayout) findViewById(R.id.bg);
bgLayout.setBackgroundResource(R.drawable.bg3);
bgLayout.setOnTouchListener(this);
bgLayout.setLongClickable(true);
}
public boolean onDown(MotionEvent e) {
// TODO Auto-generated method stub
return false;
}
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
// 处理左右滑动
if (e1.getX() - e2.getX() > 100) { // 向左滑动
if (flag == 3) {
bgLayout.setBackgroundResource(R.drawable.bg4);
flag = 4;
return true;
}
if (flag == 4) {
bgLayout.setBackgroundResource(R.drawable.bg5);
flag = 5;
return true;
}
if (flag == 1) {
bgLayout.setBackgroundResource(R.drawable.bg2);
flag = 2;
return true;
}
if (flag == 2) {
bgLayout.setBackgroundResource(R.drawable.bg3);
flag = 3;
return true;
}
} else if (e1.getX() - e2.getX() < -100) { // 向右滑动
if (flag == 3) {
bgLayout.setBackgroundResource(R.drawable.bg2);
flag = 2;
return true;
}
if (flag == 2) {
bgLayout.setBackgroundResource(R.drawable.bg1);
flag = 1;
return true;
}
if (flag == 5) {
bgLayout.setBackgroundResource(R.drawable.bg4);
flag = 4;
return true;
}
if (flag == 4) {
bgLayout.setBackgroundResource(R.drawable.bg3);
flag = 3;
return true;
}
}
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;
}
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
return this.mGesture.onTouchEvent(event);
}
}
更多关于Android图片与特效相关内容感兴趣的读者可查看本站专题：《Android开发动画技巧汇总》和《Android图形与图像处理技巧总结》
希望本文所述对大家Android程序设计有所帮助。
