使用两个适配器使交换垂直和水平工作 [英] Make Swap Vertical and Horizontal Work With Two Adapters
问题描述
因此，基本上，我正在尝试使我的应用程序像snapchat，可以在其中向左，向右，向上和向下滑动。我的问题是该应用程序没有意识到有两个适配器，只能使用一个或两个（垂直或水平）适配器。如何制作它，以便可以在
So basically I'm trying to make my app like snapchat where you can swipe left,right,up and down. My problem is that the app does not realize there are two adapters and only works one or the either(Vertically or Horrizontally).How do I make it so that I can swipe vertically as well as Horizontally on my
EmptyFragment
EmptyFragment
我目前将VerticalViewPagerAdapter扩展到FragmentPagerAdapter
I currently have my VerticalViewPagerAdapter extending to a FragmentPagerAdapter
public class VerticalViewPager extends FragmentPagerAdapter {
public VerticalViewPager(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
switch (position){
case 0:
return SettingsFragment.create();
case 1:
return EmptyFragment.create();
case 2:
return ExtrasFragment.create();
}
return null;
}
@Override
public int getCount() {
return 3;
}
以及我的HorizontalViewPagerAdapter
As well as my HorizontalViewPagerAdapter
public class HorizontalViewPager extends FragmentPagerAdapter {
public HorizontalViewPager(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
switch (position){
case 0:
return ChatFragment.create();
case 1:
return EmptyFragment.create();
case 2:
return StoryFragment.create();
}
return null;
}
@Override
public int getCount() {
return 3;
}
我不知何故不能让它们同步可以通过更改布局文件来更改我的应用是垂直还是水平
And somehow I cant have them in sync its either one or the other and I can alter if my app goes vertical or horizontal by changing my layoutfile
<View
android:id="@+id/am_background_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/green"/>
<android.support.v4.view.ViewPager
android:id="@+id/am_view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<me.kaelaela.verticalviewpager.VerticalViewPager
android:id="@+id/am_scrollView"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
我不确定是否与我的MainActivity有关
Im not sure if it has to do with my MainActivity which is
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//VerticalViewPager
me.kaelaela.verticalviewpager.VerticalViewPager verticalViewPager = findViewById(R.id.am_scrollView);
VerticalViewPager scrollViewAdapter = new VerticalViewPager(getSupportFragmentManager());
verticalViewPager.setAdapter(scrollViewAdapter);
verticalViewPager.setPageTransformer(false, new DefaultTransformer());
//HorizontalViewPager
View background = findViewById(R.id.am_background_view);
ViewPager viewPager = findViewById(R.id.am_view_pager);
HorizontalViewPager adapter = new HorizontalViewPager(getSupportFragmentManager());
viewPager.setAdapter(adapter);
viewPager.setCurrentItem(1);
推荐答案
从此处。
创建 GestureDetectorCompat 对象
GestureDetectorCompat gestureDetectorCompat;
并在活动
@Override
public boolean onTouchEvent(MotionEvent event) {
gestureDetectorCompat.onTouchEvent(event);
return true;
}
或者，如果您想检测某些视图，则可以覆盖 onTouch
or if you want to detect on some view then you can Override onTouch
someView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
gestureDetectorCompat.onTouchEvent(motionEvent);
return false;
}
});
并最好在 onCreate（）中的某个地方初始化手势DetectorCompat，如下所示
and initialize gestureDetectorCompat as follows somewhere preferably in onCreate() and you are done.
gestureDetectorCompat = new GestureDetectorCompat(this, new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
float angle = (float) Math.toDegrees(Math.atan2(e1.getY() - e2.getY(), e2.getX() - e1.getX()));
if (angle > -45 && angle <= 45) {
if(goRight != 5) mainContainer.setCurrentItem(goRight);
return true;
}
if (angle >= 135 && angle < 180 || angle < -135 && angle > -180) {
if(goLeft != 5) mainContainer.setCurrentItem(goLeft);
return true;
}
if (angle < -45 && angle >= -135) {
if(goUp != 5)mainContainer.setCurrentItem(goUp);
return true;
}
if (angle > 45 && angle <= 135) {
if(goDown != 5)mainContainer.setCurrentItem(goDown);
return true;
}
return false;
}
});
然后可以使用 mainContainer.setCurrentItem（number）; 转到其他位置/片段。
Then you can use mainContainer.setCurrentItem(number); to go to other position/fragment.
别忘了如果您使用的号码不同，号码也会更改。像这样
Don't forget that the number change if you are in different number. Like this
switch(adapter.getCurrentItem()){
case 0:
goRight = 2;
goLeft = 4;
goUp = 3;
goDown = 1;
break;
case 1:
goRight = 5;
goLeft = 5;
goUp = 0;
goDown = 5;
break;
case 2:
goRight = 5;
goLeft = 0;
goUp = 5;
goDown = 5;
break;
case 3:
goRight = 5;
goLeft = 5;
goUp = 5;
goDown = 0;
break;
case 4:
goRight = 0;
goLeft = 5;
goUp = 5;
goDown = 5;
break;
}
当您位于片段4中时，您只能进入0，而不是2
When you are in the fragment 4 you can only go to 0, not 2 if you swipe left-right.
这应该是您的适配器
public class SwipeViewPager extends FragmentPagerAdapter {
public SwipeViewPager(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
switch (position){
case 0:
return EmptyFragment.create();
case 1:
return StoryFragment.create();
case 2:
return ExtrasFragment.create();
case 3:
return ChatFragment.create();
case 4:
return SettingsFragment.create();
}
return null;
}
@Override
public int getCount() {
return 5;
}
这篇关于使用两个适配器使交换垂直和水平工作的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
