Android编程实现左右滑动切换背景的方法

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。

以上是 Android编程实现左右滑动切换背景的方法 的全部内容, 来源链接: utcz.com/z/325621.html

回到顶部