使用ViewPager的firebase的最佳方法是什么.
预期产出
如何将ViewPager与Firebase一起使用,以便通知firebase该位置并相应地获取和附加数据？
Person.java
public class Person {
private String name;
private String email;
private String hobby;
public Person(){
}
public Person(String name , String email , String hobby){
this.name= name;
this.email = email;
this.hobby = hobby;
}
public void setName(String name) {
this.name = name;
}
public void setEmail(String email) {
this.email = email;
}
public void setHobby(String hobby) {
this.hobby = hobby;
}
public String getName() {
return name;
}
public String getEmail() {
return email;
}
public String getHobby() {
return hobby;
}
}
MainActivity.java
public class MainActivity extends AppCompatActivity {
private ViewPager viewPager;
// private FirebaseAuth mAuth;
List person;
private Context context;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
person = new ArrayList<>();
// mAuth = FirebaseAuth.getInstance();
context = this;
viewPager = (ViewPager) findViewById(R.id.pagerView);
viewPager.setAdapter(new MyPagerAdapter(getSupportFragmentManager(), person, context));
}
class MyPagerAdapter extends FragmentPagerAdapter {
String[] tabsArray;
private List personInAdapter = new ArrayList<>();
private Context context;
// int icons[] = {R.drawable.white_home, R.drawable.white_heart,
// R.drawable.white_star, R.drawable.white_heart, R.drawable.white_star};
public MyPagerAdapter(FragmentManager fm, List person, Context context) {
super(fm);
personInAdapter = person;
this.context = context;
tabsArray = getResources().getStringArray(R.array.TABS);
}
// @Override
// public CharSequence getPageTitle(int position) {
// return tabsArray[position];
// }
@Override
public Fragment getItem(int position) {
return MyFragment.getInstance(position );
}
@Override
public int getCount() {
return personInAdapter.size();
}
}
}
MyFragment.java
public class MyFragment extends Fragment {
private TextView upperText;
private TextView lowerText;
List personInAdapter = new ArrayList<>();
private Context context;
private DatabaseReference databaseReference;
public static MyFragment getInstance(int position) {
MyFragment myFragment = new MyFragment();
Bundle args = new Bundle();
args.putInt("position", position);
myFragment.setArguments(args);
return myFragment;
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_my, container, false);
upperText = (TextView) view.findViewById(R.id.myFragmentUpperText);
lowerText = (TextView) view.findViewById(R.id.myFragmentLowerText);
databaseReference = FirebaseUtil.getBaseRef().child("Person");
int i = getArguments().getInt("position");
ValueEventListener postListener = new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
// Get Post object and use the values to update the UI
for (DataSnapshot personSnapshot: dataSnapshot.getChildren()) {
Person person = personSnapshot.getValue(Person.class);
upperText.setText(person.getName());
lowerText.setText(person.getEmail());
Log.i("Data In Person ", person.toString());
}
// [END_EXCLUDE]
}
@Override
public void onCancelled(DatabaseError databaseError) {
// Getting Post failed, log a message
// [START_EXCLUDE]
}
};
databaseReference.addValueEventListener(postListener);
// Bundle bundle = getArguments();
// if (bundle != null) {
// textView.setText("The value is" +i);
// }
return view;
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
}
我已经使用FirebaseRecyclerView尝试了firebase,并在自定义的Recyclerview中实现了它,它就像魅力一样
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