Android(安卓)Activity上下滑动切换背景

Android左右滑动切换背景

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

同事需要设置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

publicbooleanonTouch(Viewv,MotionEventevent){

//TODOAuto-generatedmethodstub

returnthis.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;@Overridepublic 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 stubreturn 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 stubreturn false;}public void onShowPress(MotionEvent e) {// TODO Auto-generated method stub}public boolean onSingleTapUp(MotionEvent e) {// TODO Auto-generated method stubreturn false;}public boolean onTouch(View v, MotionEvent event) {// TODO Auto-generated method stubreturn this.mGesture.onTouchEvent(event);}}

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