im正在搜索一些时间，以找到一个解决方案，以在片段之间发送数据，而不是单击任何按钮，而仅在滑动和/或单击底部nav bar上，
因此，就我而言，我有一个视图器和同一活动中的三个片段。在第一个片段上，我有一个Seekbar，它向我展示了文本视图中的进展，而在第二片片段中也是如此。我想将每个TextView Integer传递到第三片片段上的两个文本视图。但这应该在我滑动到最后一个片段时做到这一点。希望您了解我想做的事和可以提供帮助。
我试图实现Onpause和Onstop，但它不起作用。我还有其他方法可以称呼吗？我知道，如果我将视图更改为其他片段，则应该有一个呼叫诸如Onswipe或OnchangeView之类的调用，以调用命令将数据发送到最后一个片段。
我的XML文件fragment_holding(对于pageone(有一个seekbar和一个正在显示进度的文本视图fragment_wind(对于pagetwo(有一个seekbar和一个正在显示进度的文本视图fragment_answer(对于Pagetree(有两个文本视图，可以在每个Seekbar
的进度fragmentAdapter
public class FragmentAdapter extends FragmentPagerAdapter {
private List<android.support.v4.app.Fragment> Fragment = new ArrayList<>(); //Fragment List
private List<String> NamePage = new ArrayList<>(); // Fragment Name List
public FragmentAdapter(FragmentManager manager) {
super(manager);
}
public void add(Fragment Frag, String Title) {
Fragment.add(Frag);
NamePage.add(Title);
}
@Override
public Fragment getItem(int position) {
return Fragment.get(position);
}
@Override
public CharSequence getPageTitle(int position) {
return NamePage.get(position);
}
@Override
public int getCount() {
return 3;
}
MainActivity
public class MainActivity extends AppCompatActivity{
ViewPager viewPager;
BottomNavigationView navigation;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
navigation = findViewById(R.id.navigation);
navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
viewPager = findViewById(R.id.viewpager); //Init Viewpager
setupFm(getSupportFragmentManager(), viewPager); //Setup Fragment
viewPager.setCurrentItem(0); //Set Currrent Item When Activity Start
viewPager.setOnPageChangeListener(new PageChange()); //Listeners For Viewpager When Page Changed
}
public static void setupFm(FragmentManager fragmentManager, ViewPager viewPager){
FragmentAdapter Adapter = new FragmentAdapter(fragmentManager);
//Add All Fragment To List
Adapter.add(new PageOne(), "Page One");
Adapter.add(new PageTwo(), "Page Two");
Adapter.add(new PageTree(), "Page Three");
viewPager.setAdapter(Adapter);
}
private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
= new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.navigation_home:
viewPager.setCurrentItem(0);
return true;
case R.id.navigation_dashboard:
viewPager.setCurrentItem(1);
return true;
case R.id.navigation_notifications:
viewPager.setCurrentItem(2);
return true;
}
return false;
}
};
public class PageChange implements ViewPager.OnPageChangeListener {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
switch (position) {
case 0:
navigation.setSelectedItemId(R.id.navigation_home);
break;
case 1:
navigation.setSelectedItemId(R.id.navigation_dashboard);
break;
case 2:
navigation.setSelectedItemId(R.id.navigation_notifications);
break;
}
}
@Override
public void onPageScrollStateChanged(int state) {
}
}
pageone 公共类Pageone扩展了片段{
private SeekBar sbar;
private TextView tView;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
@SuppressLint("InflateParams") View view = inflater.inflate(R.layout.fragment_holding, null);
sbar =(SeekBar) view.findViewById(R.id.seekBar5);
tView = (TextView) view.findViewById(R.id.textView6);
tView.setText(sbar.getProgress() + "/" + sbar.getMax());
sbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
int pval = 0;
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
pval = progress;
tView.setText(pval + "/" + seekBar.getMax());
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
//write custom code to on start progress
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
return view;
}
PAGETWO
public class PageTwo extends Fragment {
private SeekBar sbar4;
private TextView tView4;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
@SuppressLint("InflateParams") View view = inflater.inflate(R.layout.fragment_wind, null);
sbar4 =(SeekBar) view.findViewById(R.id.seekBar5);
tView4 = (TextView) view.findViewById(R.id.textView6);
tView4.setText(sbar4.getProgress() + "/" + sbar4.getMax());
sbar4.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
int pval = 0;
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
pval = progress;
tView4.setText(pval + "/" + seekBar.getMax());
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
//write custom code to on start progress
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
return view;
}
Pagetree
公共类Pagetree扩展了Fragment {
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_answer, container, false);
return view;
}
在您的适配器中执行此操作： -
@NonNull
@Override
public Fragment getItem(int position) {
GridFragment gridFragment = new GridFragment();
Bundle bundle = new Bundle();
bundle.putInt("position", position);
bundle.putString("survayType", survayType);
bundle.putInt("questionNo", questionNo);
gridFragment.setArguments(bundle);
return gridFragment;
}
在您的片段中确实喜欢： -
optionPosition = getArguments().getInt("position");
survayType = getArguments().getString("survayType");
questionNo = getArguments().getInt("questionNo");