AndroidStudio 질문) View Pager가 Fragment를 화면에 표시하지 않습니다.
조회수 1183회
ViewPager와 ToolBar의 TabLayout을 이용하여 Swipe Activity를 구현하는 과정에서 문제가 생겼습니다. ViewPager가 내용물 Fragment를 화면에 표시하지 않습니다. 빠트린 내용이나 잘못된 부분을 아시는 분께서는 부디 알려주셨으면 좋겠습니다. 부탁드립니다 _ _)
아래는 MyViewPagerAdapter.java 입니다.
package com.zer0kencreation.macaronpicker;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
public class MyViewPagerAdapter extends FragmentStatePagerAdapter {
public MyViewPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
switch (position){
case 0:
return new OthersFragment();
case 1:
return new MineFragment();
case 2:
return new ReceiverFragment();
case 3:
return new GiverFragment();
}
return null;
}
@Override
public int getCount() {
return 4;
}
}
아래는 MainActivity.java입니다.
package com.zer0kencreation.macaronpicker;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
public class MainActivity extends AppCompatActivity {
private Toolbar mainTB;
private TabLayout mainTL;
private ViewPager mainVP;
private MyViewPagerAdapter vpAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mainTB = (Toolbar)findViewById(R.id.main_tb);
setSupportActionBar(mainTB);
mainTL = (TabLayout)findViewById(R.id.main_tl);
mainVP = (ViewPager)findViewById(R.id.main_vp);
vpAdapter = new MyViewPagerAdapter(getSupportFragmentManager());
mainVP.setAdapter(vpAdapter);
mainVP.setCurrentItem(0);
mainTL.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
switch (tab.getPosition()){
case 0:
mainVP.setCurrentItem(0);
break;
case 1:
mainVP.setCurrentItem(1);
break;
case 2:
mainVP.setCurrentItem(2);
break;
case 3:
mainVP.setCurrentItem(3);
break;
}
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
}
}
아래는 각 Fragment의 class입니다.
[OhterFragment.java]
package com.zer0kencreation.macaronpicker;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class OthersFragment extends android.support.v4.app.Fragment {
public OthersFragment(){
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_others, container, false);
}
}
[MineFragment.java]
package com.zer0kencreation.macaronpicker;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class MineFragment extends android.support.v4.app.Fragment {
public MineFragment(){
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_mine, container, false);
}
}
[ReceiverFragment.java]
package com.zer0kencreation.macaronpicker;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class ReceiverFragment extends android.support.v4.app.Fragment {
public ReceiverFragment(){
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_receiver, container, false);
}
}
[GiverFragment.java]
package com.zer0kencreation.macaronpicker;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class GiverFragment extends android.support.v4.app.Fragment {
public GiverFragment(){
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_giver, container, false);
}
}
아래는 activity_main.xml입니다.
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="@+id/main_abl"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
android:id="@+id/main_tb"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_scrollFlags="scroll|enterAlways"></android.support.v7.widget.Toolbar>
<android.support.design.widget.TabLayout
android:id="@+id/main_tl"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.TabItem
android:id="@+id/others"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/tab1" />
<android.support.design.widget.TabItem
android:id="@+id/mine"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/tab2" />
<android.support.design.widget.TabItem
android:id="@+id/receiver"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/tab3" />
<android.support.design.widget.TabItem
android:id="@+id/giver"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/tab4" />
</android.support.design.widget.TabLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="android.support.design.widget.AppBarLayout$ScrollingViewBehavior">
<android.support.v4.view.ViewPager
android:id="@+id/main_vp"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
아래는 각 Fragment의 layout입니다.
[fragment_others.xml]
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="others fragment"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</LinearLayout>
[fragment_others.xml]
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="mine fragment"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</LinearLayout>
[fragment_receiver.xml]
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="receiver fragment"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</LinearLayout>
[fragment_giver.xml]
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="giver fragment"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</LinearLayout>
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