Android 将cardView放入选项卡片段
如果你愿意的话,这里有一个项目的链接,这里的帖子有点大。 我学习了两个教程。一个是如何使用卡片创建回收器,另一个是创建选项卡布局。我想把两者结合起来,这样卡片就成了一个标签碎片 这是我的主要活动:Android 将cardView放入选项卡片段,android,android-studio,android-layout,android-fragments,android-recyclerview,Android,Android Studio,Android Layout,Android Fragments,Android Recyclerview,如果你愿意的话,这里有一个项目的链接,这里的帖子有点大。 我学习了两个教程。一个是如何使用卡片创建回收器,另一个是创建选项卡布局。我想把两者结合起来,这样卡片就成了一个标签碎片 这是我的主要活动: package com.example.growdiary; import android.net.Uri; import android.os.Bundle; import com.google.android.material.floatingactionbutton.FloatingAct
package com.example.growdiary;
import android.net.Uri;
import android.os.Bundle;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.android.material.snackbar.Snackbar;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import com.google.android.material.tabs.TabLayout;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.viewpager.widget.ViewPager;
import androidx.viewpager.widget.PagerAdapter;
public class MainActivity extends AppCompatActivity implements
Tab1Fragment.OnFragmentInteractionListener,
Tab2Fragment.OnFragmentInteractionListener,
Tab3Fragment.OnFragmentInteractionListener,
Tab4Fragment.OnFragmentInteractionListener {
RecyclerView recyclerView;
RecyclerView.LayoutManager layoutManager;
RecyclerView.Adapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
recyclerView = findViewById(R.id.recycler_view);
layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);
adapter = new com.example.growdiary.RecyclerAdapter();
recyclerView.setAdapter(adapter);
FloatingActionButton fab = findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
configureTabLayout();
}
private void configureTabLayout() {
TabLayout tabLayout = findViewById(R.id.tab_layout);
tabLayout.addTab(tabLayout.newTab().setText("Tab 1 Item"));
tabLayout.addTab(tabLayout.newTab().setText("Tab 2 Item"));
tabLayout.addTab(tabLayout.newTab().setText("Tab 3 Item"));
tabLayout.addTab(tabLayout.newTab().setText("Tab 4 Item"));
final ViewPager viewPager = findViewById(R.id.pager);
final PagerAdapter adapter = new TabPagerAdapter(getSupportFragmentManager(), tabLayout.getTabCount());
viewPager.setAdapter(adapter);
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
}
@Override
public void onFragmentInteraction(Uri uri) {
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
这是一个标签片段
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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:id="@+id/frameLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".Tab1Fragment">
<TextView
android:id="@+id/textView3"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="Tab 1 Fragment" />
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
如果我将回收器xml放在content_main.xml中,它会工作,但我的选项卡不再工作。我正在学习如何用java做所有这些事情,但要把它们结合起来有点困难,谢谢。好了,伙计们,我自己不知怎么搞明白了。我把它移出了主java类
recyclerView = findViewById(R.id.recycler_view);
layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);
adapter = new com.example.growdiary.RecyclerAdapter();
recyclerView.setAdapter(adapter);
进入相应的tab1 java类
然后我发现了一些错误,并做了一些修改
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_tab1, container, false);
recyclerView = (RecyclerView) view.findViewById(R.id.recycler_view); <-- added view to findViewById(R.id.recycler_view);
layoutManager = new LinearLayoutManager(this.getActivity()); <--added getActivity
recyclerView.setLayoutManager(layoutManager);
adapter = new com.example.growdiary.RecyclerAdapter();
recyclerView.setAdapter(adapter);
// Inflate the layout for this fragment
return view;
}
@覆盖
创建视图上的公共视图(布局、充气机、视图组容器、,
Bundle savedInstanceState){
视图=充气机。充气(R.layout.fragment_tab1,容器,假);
recyclerView=(recyclerView)视图.findViewById(R.id.recycler\u视图);
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_tab1, container, false);
recyclerView = (RecyclerView) view.findViewById(R.id.recycler_view); <-- added view to findViewById(R.id.recycler_view);
layoutManager = new LinearLayoutManager(this.getActivity()); <--added getActivity
recyclerView.setLayoutManager(layoutManager);
adapter = new com.example.growdiary.RecyclerAdapter();
recyclerView.setAdapter(adapter);
// Inflate the layout for this fragment
return view;
}