對於Android桌面可以用手勢左右滑動進行切換。或者大家用過iReader的一定被其豐富的手勢折服吧。現在看看自己的多個Activy之間如何切換呢
1、需要繼承OnGestureListener和OnDoubleTapListener,如下:
2、在添加mGestureDetector的定義,並在ViewSnsActivity的onCreate函數中加入其頁面佈局的setOnTouchListener事件
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.view_sns_activity);
- mGestureDetector = new GestureDetector((OnGestureListener) this);
- LinearLayout viewSnsLayout = (LinearLayout)findViewById(R.id.viewSnsLayout);
- viewSnsLayout.setOnTouchListener(this);
- viewSnsLayout.setLongClickable(true);
- }
3、重載onFling函數
- public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
- float velocityY) {
- if (e1.getX()-e2.getX() > snsConstant.getFlingMinDistance()
- && Math.abs(velocityX) > snsConstant.getFlingMinVelocity()) {
- // 切換Activity
- // Intent intent = new Intent(ViewSnsActivity.this, UpdateStatusActivity.class);
- // startActivity(intent);
- Toast.makeText(this, "向左手勢", Toast.LENGTH_SHORT).show();
- } else if (e2.getX()-e1.getX() > snsConstant.getFlingMinDistance()
- && Math.abs(velocityX) > snsConstant.getFlingMinVelocity()) {
- // 切換Activity
- // Intent intent = new Intent(ViewSnsActivity.this, UpdateStatusActivity.class);
- // startActivity(intent);
- Toast.makeText(this, "向右手勢", Toast.LENGTH_SHORT).show();
- }
- return false;
- }
其中SnsConstant如下:
- public class SnsConstant {
- private static final int FLING_MIN_DISTANCE = 50;
- private static final int FLING_MIN_VELOCITY = 0;
- public static int getFlingMinDistance() {
- return FLING_MIN_DISTANCE;
- }
- public static int getFlingMinVelocity() {
- return FLING_MIN_VELOCITY;
- }
- }
4、重載onTouch函數
- public boolean onTouch(View v, MotionEvent event) {
- return mGestureDetector.onTouchEvent(event);
- }