我用几个片段制作了一个选项卡菜单。我将在每个Fragment中放入cardview。 我尝试了Googling,但我要做的就是在活动中添加卡片视图。
我想在卡片片段中放入卡片视图,然后在单击卡片时实施预定义的设置活动。
我该怎么办?
我在标签菜单中提到了https://www.codingdemos.com/android-tablayout-example-viewpager。
我附上我的片段布局(xml文件)代码
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.aeyoung.csw.CommunityFragment">
<!-- TODO: Update blank fragment layout -->
<android.support.constraint.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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.aeyoung.csw.CommunityFragment">
<android.support.v7.widget.RecyclerView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</android.support.v7.widget.RecyclerView>
</android.support.constraint.ConstraintLayout>
</FrameLayout>
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import java.util.ArrayList;
import java.util.List;
public class CommunityFragment extends AppCompatActivity {
//Create parameter
List<Product> productList = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_community);
// initialize parameter "productList"
setInitialData();
//Find RecyclerView from fragment_community.xml
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.list);
// Create LinearLayoutManager and set it to RecyclerView
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(linearLayoutManager);
//Create MyAdapter object with the parameters and set to RecyclerView
MyAdapter myAdapter = new MyAdapter(this, productList);
recyclerView.setAdapter(myAdapter);
}
private void setInitialData() {
productList.add(new Product("text1", "text1", R.mipmap.ic_launcher));
productList.add(new Product("text2", "text2", R.mipmap.ic_launcher));
productList.add(new Product("text3", "text3", R.mipmap.ic_launcher));
productList.add(new Product("text4", "text4", R.mipmap.ic_launcher));
productList.add(new Product("text5", "text5", R.mipmap.ic_launcher));
productList.add(new Product("text6", "text6", R.mipmap.ic_launcher));
productList.add(new Product("text7", "text7", R.mipmap.ic_launcher));
productList.add(new Product("text8", "text8", R.mipmap.ic_launcher));
productList.add(new Product("text9", "text9", R.mipmap.ic_launcher));
productList.add(new Product("text10", "text10", R.mipmap.ic_launcher));
}
}
PageAdapter.java代码
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
/**
* Created by abdalla on 2/18/18.
*/
public class PageAdapter extends FragmentPagerAdapter {
private int numOfTabs;
PageAdapter(FragmentManager fm, int numOfTabs) {
super(fm);
this.numOfTabs = numOfTabs;
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new MajorFragment();
case 1:
return new FresherFragment();
case 2:
return new CommunityFragment();
case 3:
return new SettingsFragment();
default:
return null;
}
}
@Override
public int getCount() {
return numOfTabs;
}
}
并且在构建时发生以下错误。 “错误:类型不兼容:CommunityFragment无法转换为Fragment”
答案 0 :(得分:2)
因为错误告诉您"error: incompatible types: CommunityFragment cannot be converted to Fragment"
您CommunityFragment扩展了AppCompatActivity
,它不是片段。