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我找不到 ViewPager2(Capture Screen) 的 AppCompatTextView

分类：编程问答

如何解决我找不到 ViewPager2(Capture Screen) 的 AppCompatTextView

问题：

Problem


如果我修复了：

After


我想在 Android-Studio 中看到 AppCompatTextView。
如何查看 AppCompatTextView？
没有错误！不知道为什么..
请帮忙解决这个问题..



activity_searchresult.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"
    android:background="@color/cfb"
    tools:context=".ResultActivity">

    <FrameLayout
        android:id="@+id/content_layout"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" >

        <androidx.constraintlayout.widget.ConstraintLayout
            android:id="@+id/linearLayout"
            android:layout_width="match_parent"
            android:layout_height="600dp"
            android:background="@color/cfb"
            tools:context=".ResultActivity">

            <TextView
                android:id="@+id/resultText1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/result_text1"
                android:textColor="@color/black"
                android:textSize="23sp"
                android:layout_marginLeft="30dp"
                app:layout_constraintBottom_toTopOf="@+id/resultText2"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent" />
            <TextView
                android:id="@+id/resultText2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/result_text2"
                android:textColor="@color/black"
                android:textSize="23sp"
                android:layout_marginBottom="30dp"
                app:layout_constraintBottom_toTopOf="@+id/resultViewPager2"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent" />


            <ImageButton
                android:id="@+id/resultFilterButton"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="0dp"
                android:layout_marginBottom="10dp"
                android:layout_marginEnd="15dp"
                android:layout_marginRight="28dp"
                android:background="@color/cfb"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintBottom_toBottomOf="@+id/dots_indicator"
                app:srcCompat="@drawable/filter" />

            <TextView
                android:id="@+id/filterText"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginEnd="25dp"
                android:layout_marginRight="40dp"
                android:text="@string/filter"
                android:textColor="#000000"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/resultFilterButton" />

            <androidx.viewpager2.widget.ViewPager2
                android:id="@+id/resultViewPager2"
                android:layout_width="270dp"
                android:layout_height="270dp"
                android:layout_marginBottom="190dp"
                android:orientation="horizontal"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.5"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintVertical_bias="0.3" />

            <com.tbuonomo.viewpagerdotsindicator.DotsIndicator
                android:id="@+id/dots_indicator"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="110dp"
                app:dotsColor="@color/white"
                app:dotsCornerRadius="8dp"
                app:dotsSize="14dp"
                app:dotsspacing="4dp"
                app:dotsWidthFactor="2.5"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.498"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/resultViewPager2"
                app:layout_constraintBottom_toBottomOf="parent"
                app:progressMode="true"
                app:selectedDotColor="@color/black" />
            <ImageView
                android:layout_width="90dp"
                android:layout_height="90dp"
                android:layout_marginStart="10dp"
                android:layout_marginLeft="10dp"
                android:layout_marginBottom="30dp"
                app:layout_constraintBottom_toTopOf="@+id/resultViewPager2"
                app:srcCompat="@drawable/cafebot" />
        </androidx.constraintlayout.widget.ConstraintLayout>

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            tools:context=".ResultActivity">
            <FrameLayout
                android:id="@+id/frameLayout"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                app:layout_constraintBottom_toTopOf="@id/navigationView"
                app:layout_constraintLeft_toLeftOf="parent"
                app:layout_constraintRight_toRightOf="parent"
                app:layout_constraintTop_toTopOf="parent"/>

            <com.google.android.material.bottomnavigation.BottomNavigationView
                android:id="@+id/navigationView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="?android:attr/windowBackground"
                app:itemTextColor="@drawable/bottom_icon_color"
                app:itemIconTint="@drawable/bottom_icon_color"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintLeft_toLeftOf="parent"
                app:layout_constraintRight_toLeftOf="parent"
                app:menu="@menu/bottom_nav" />

        </androidx.constraintlayout.widget.ConstraintLayout>

    </FrameLayout>

</LinearLayout>

result_item_viewpager.xml：

<?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/result_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <androidx.appcompat.widget.AppCompatTextView
        android:id="@+id/result_menu_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"
        android:textColor="@android:color/black"
        android:textSize="26sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/result_sample_image" />

    <androidx.appcompat.widget.AppCompatTextView
        android:id="@+id/result_cafe_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"
        android:textColor="@android:color/black"
        android:textStyle="bold"
        android:textSize="23sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/result_menu_name" />

    <androidx.appcompat.widget.AppCompatTextView
        android:id="@+id/result_product_price"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"
        android:textColor="@android:color/black"
        android:textSize="22sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/result_cafe_name" />

    <ImageView
        android:id="@+id/result_sample_image"
        android:layout_width="270dp"
        android:layout_height="270dp"
        android:layout_marginTop="4dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:srcCompat="@tools:sample/avatars" />

</androidx.constraintlayout.widget.ConstraintLayout>

ResultDataPage.java：

package com.example.myapplication;

public class ResultDataPage {
    int resultimage;
    String resultCafeName;
    String resultMenuName;
    int resultPrice;

    public ResultDataPage(int image,String menuName,String cafeName,int price){
        this.resultimage = image;
        this.resultMenuName = menuName;
        this.resultCafeName = cafeName;
        this.resultPrice = price;
    }

    public int getimage(){
        return resultimage;
    }

    public void setimage(int image) {
        this.resultimage = image;
    }

    public String getMenuName(){
        return resultMenuName;
    }

    public void setMenuName(String menuName) {
        this.resultMenuName = menuName;
    }

    public String getCafeName() {
        return resultCafeName;
    }

    public void setCafeName(String cafeName) {
        this.resultCafeName = cafeName;
    }

    public int getPrice(){
        return resultPrice;
    }

    public void setPrice(int price){
        this.resultPrice = price;
    }
}

ResultViewPagerAdapter.java:

package com.example.myapplication;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import androidx.recyclerview.widget.RecyclerView;

import java.util.ArrayList;

public class ResultViewPagerAdapter extends RecyclerView.Adapter<ResultViewHolderPage> {

    private ArrayList<ResultDataPage> listData;

    ResultViewPagerAdapter(ArrayList<ResultDataPage> data) {
        this.listData = data;
    }

    @Override
    public ResultViewHolderPage onCreateViewHolder(ViewGroup parent,int viewType) {
        Context context = parent.getContext();
        View view = LayoutInflater.from(context).inflate(R.layout.result_item_viewpager,parent,false);
        return new ResultViewHolderPage(view);
    }

    @Override
    public void onBindViewHolder(ResultViewHolderPage holder,int position) {
        if(holder instanceof ResultViewHolderPage){
            ResultViewHolderPage viewHolder = (ResultViewHolderPage) holder;
            viewHolder.onBind(listData.get(position));
        }
    }

    @Override
    public int getItemCount() {
        return listData.size();
    }
}

ResultViewHolderPage.java：

package com.example.myapplication;

import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

import androidx.constraintlayout.widget.ConstraintLayout;
import androidx.recyclerview.widget.RecyclerView;

public class ResultViewHolderPage extends RecyclerView.ViewHolder {
    
    private ImageView resultimage;
    private TextView resultCafeName;
    private TextView resultMenuName;
    private TextView resultPrice;

    ResultDataPage resultData;

    ResultViewHolderPage(View itemView) {
        super(itemView);
        resultCafeName = itemView.findViewById(R.id.result_cafe_name);
        resultimage = itemView.findViewById(R.id.result_sample_image);
        resultPrice = itemView.findViewById(R.id.result_product_price);
        resultMenuName = itemView.findViewById(R.id.result_menu_name);
    }

    public void onBind(ResultDataPage resultData){
        this.resultData = resultData;

        resultMenuName.setText(resultData.getMenuName());
        resultCafeName.setText(resultData.getCafeName());
        resultimage.setimageResource(resultData.getimage());
        resultPrice.setText(Integer.toString(resultData.getPrice()).concat("원"));
    }
}

ResultActivity.java：

package com.example.myapplication;

import android.content.Intent;
import android.os.Bundle;
import android.view.MenuItem;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentTransaction;
import androidx.viewpager2.widget.ViewPager2;

import com.google.android.material.bottomnavigation.BottomNavigationView;
import com.tbuonomo.viewpagerdotsindicator.DotsIndicator;

import java.util.ArrayList;

public class ResultActivity extends AppCompatActivity {
    // 가운데
    private ViewPager2 result_ViewPager2;
    private DotsIndicator dotsIndicator;
    private ArrayList<ResultDataPage> list;

    // 바텀네비게이션뷰
    private BottomNavigationView bottomNav;
    private FragmentManager fragmentManager = getSupportFragmentManager();
    private SearchPage fragmentSearch = new SearchPage();
    private HomePage fragmentHome = new HomePage();
    private CafePage fragmentCafe = new CafePage();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_searchresult);

        this.viewpage(); // 뷰페이저 (메뉴검색결과값)

        // 바텀네비게이션
        bottomNav = findViewById(R.id.navigationView);
        bottomNav.setonNavigationItemSelectedListener(new ResultActivity.ItemSelectedListener());
    }

    private void viewpage(){
        list = new ArrayList<>();
        list.add(new ResultDataPage(R.drawable.sample_1,"아메리카노","스타벅스",4900));
        list.add(new ResultDataPage(R.drawable.sample_2,"투썸플레이스",4100));
        list.add(new ResultDataPage(R.drawable.sample_3,"이디야커피",3000));
        list.add(new ResultDataPage(R.drawable.sample_3,"EDIYA",3000));

        result_ViewPager2 = findViewById(R.id.resultViewPager2);
        result_ViewPager2.setAdapter(new ResultViewPagerAdapter(list));

        dotsIndicator = findViewById(R.id.dots_indicator);
        dotsIndicator.setViewPager2(result_ViewPager2);
    }

    //바텀네비
    class ItemSelectedListener implements BottomNavigationView.OnNavigationItemSelectedListener {
        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
            FragmentTransaction transaction = fragmentManager.beginTransaction();

            switch (menuItem.getItemId()) {
                case R.id.searchItem:
                    Intent intent1 = new Intent(getApplicationContext(),com.example.myapplication.SearchActivity.class);
                    startActivity(intent1);
                    //transaction.replace(R.id.frameLayout,fragmentSearch).commitAllowingStateLoss();
                    break;
                case R.id.homeItem:
                    Intent intent2 = new Intent(getApplicationContext(),com.example.myapplication.MainActivity.class);
                    startActivity(intent2);
                    //transaction.replace(R.id.frameLayout,fragmentHome).commitAllowingStateLoss();
                    break;
                case R.id.cafeItem:
                    Intent intent3 = new Intent(getApplicationContext(),com.example.myapplication.MainCflistActivity.class);
                    startActivity(intent3);
                    //transaction.replace(R.id.frameLayout,fragmentCafe).commitAllowingStateLoss();
                    break;
            }
            return true;
        }
    }

}

解决方法

更新：（详情见下方评论） 最后，因为 ViewPager 太小，文本被隐藏了。

AppCompatTextView 是一个复古兼容的文本视图，用于旧的支持库支持。 您支持的最低 SDK 版本是哪个？ 如果您使用的是 AndroidX，则不需要此功能。

但是，它带有这种依赖性，您必须将其放入模块 build.gradle 文件中：

implementation 'com.android.support:appcompat-v7:28.0.0'

此后，同步 Gradle，您可以使用“AppCompatTextView”：

enter image description here

参考资料： https://developer.android.com/topic/libraries/support-library/packages#v7 https://developer.android.com/topic/libraries/support-library/setup#choosing https://developer.android.com/reference/androidx/appcompat/widget/AppCompatTextView

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