我有两个片段(选项卡)共享一些数据。当一个人更改数据时,我希望在另一个选项卡上反映出来。我在stackOverflow上研究了这一点,我认为相关的答案与.notifyDataSetChanged()
调用有关,但我无法使其工作。这是相关代码。。。
public class EnterCourseData extends FragmentActivity implements ActionBar.TabListener {
private ViewPager viewPager;
private TabsPagerAdapter mAdapter;
private ActionBar actionBar;
// Tab titles
private String[] tabs = { "Pars", "Handicaps" };
private int courseNumber, teeNumber;
private Tee tee;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_enter_tees);
// Initilization
Intent mIntent = getIntent();
courseNumber = mIntent.getIntExtra("courseNumber",0);
Course course = Global.getCourse(courseNumber);
teeNumber = mIntent.getIntExtra("teeNumber",0);
tee = course.getTee(teeNumber);
viewPager = (ViewPager) findViewById(R.id.pager);
actionBar = getActionBar();
mAdapter = new TabsPagerAdapter(getSupportFragmentManager(), courseNumber, teeNumber);
viewPager.setAdapter(mAdapter);
actionBar.setHomeButtonEnabled(false);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Adding Tabs
for (String tab_name : tabs) {
actionBar.addTab(actionBar.newTab().setText(tab_name)
.setTabListener(this));
}
/**
* on swiping the viewpager make respective tab selected
* */
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageSelected(int position) {
// on changing the page
// make respected tab selected
actionBar.setSelectedNavigationItem(position);
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageScrollStateChanged(int arg0) {
}
});
}
再往下看,这里是onClick方法,它需要刷新。。。
public void savePars(View view){
tee.setSlope(Integer.parseInt(((EditText) findViewById(R.id.enter_tee_slope)).getText().toString()));
tee.setRating(Double.parseDouble(((EditText) findViewById(R.id.enter_tee_rating)).getText().toString()));
mAdapter.notifyDataSetChanged();
}
这是TabsPagerAdapter。。。
public class TabsPagerAdapter extends FragmentPagerAdapter {
int courseNumber, teeNumber;
public TabsPagerAdapter(FragmentManager fm, int courseNumber, int teeNumber) {
super(fm);
this.courseNumber = courseNumber;
this.teeNumber = teeNumber;
}
@Override
public Fragment getItem(int index) {
switch (index) {
case 0:
// Par Entry activity
Fragment parFragment = new ParFragment();
Bundle args = new Bundle();
args.putInt(ParFragment.ARG_COURSE_NUMBER, courseNumber);
args.putInt(ParFragment.ARG_TEE_NUMBER, teeNumber);
parFragment.setArguments(args);
return parFragment;
case 1:
// Handicap Entry fragment activity
Fragment hcpFragment = new HandicapFragment();
args = new Bundle();
args.putInt(HandicapFragment.ARG_COURSE_NUMBER, courseNumber);
args.putInt(HandicapFragment.ARG_TEE_NUMBER, teeNumber);
hcpFragment.setArguments(args);
return hcpFragment;
}
return null;
}
@Override
public int getCount() {
// get item count - equal to number of tabs
return 2;
}
}
这是一个片段。。。
public class ParFragment extends Fragment {
public static final String ARG_COURSE_NUMBER = "courseNumber", ARG_TEE_NUMBER = "teeNumber";
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_par, container, false);
Bundle args = getArguments();
Course course = Global.getCourse(args.getInt(ARG_COURSE_NUMBER));
((TextView) rootView.findViewById(R.id.display_course_name)).setText(course.getName());
Tee tee = course.getTee(args.getInt(ARG_TEE_NUMBER));
((TextView) rootView.findViewById(R.id.display_tee_name)).setText(tee.getTeeName());
((TextView) rootView.findViewById(R.id.enter_tee_slope)).setText(Integer.toString(tee.getSlope()));
((TextView) rootView.findViewById(R.id.enter_tee_rating)).setText(Double.toString(tee.getRating()));
return rootView;
}
}
这是另一个。。。
public class HandicapFragment extends Fragment {
public static final String ARG_COURSE_NUMBER = "courseNumber", ARG_TEE_NUMBER = "teeNumber";
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_handicap, container, false);
Bundle args = getArguments();
Course course = Global.getCourse(args.getInt(ARG_COURSE_NUMBER));
((TextView) rootView.findViewById(R.id.display_course_name)).setText(course.getName());
Tee tee = course.getTee(args.getInt(ARG_TEE_NUMBER));
((TextView) rootView.findViewById(R.id.display_tee_name)).setText(tee.getTeeName());
((TextView) rootView.findViewById(R.id.enter_tee_slope)).setText(Integer.toString(tee.getSlope()));
((TextView) rootView.findViewById(R.id.enter_tee_rating)).setText(Double.toString(tee.getRating()));
return rootView;
}
}
单击按钮时,我希望保存这些值,并希望这些值显示在另一个片段上。
帮一个小家伙。
感谢
您需要在片段之间进行通信,但一个片段不能直接与其他片段通信,所有的通信都应该通过保存这些片段的活动来完成。
接下来的步骤是:
-
在实现onClickListener的片段中定义一个接口(让它成为片段A)
-
在保存这些片段的活动中实现接口
-
在重写的方法中,从视图寻呼机适配器检索片段实例,并通过调用片段B的公共方法将消息传递给片段B。
引用这个答案可以从适配器中检索片段实例
有关与其他碎片通信的更多详细信息,请参阅此处的
所以有一个技巧:只需让片段具有彼此的对象引用,并在处理按钮的onClickListener时调用另一个的函数来加载数据。例如:
protected void onClickListener(View view) {
if (view == myButton) {
// Do other stuffs here
fragment1.reloadData();
}
}
p/S:我将此作为答案重新发布,以便拥有代码格式化程序。