[Android] RecyclerViewとItemTouchHelperでドラッグ&ドロップ

dependencies {
    ...
    implementation 'androidx.recyclerview:recyclerview:1.2.1'
}

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dependencies {

...

implementation 'androidx.recyclerview:recyclerview:1.2.1'

}

//package com.example.testitemtouchhelper;

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import androidx.recyclerview.widget.DividerItemDecoration;
import androidx.recyclerview.widget.ItemTouchHelper;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.LinearLayoutManager;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import androidx.annotation.NonNull;

public class MainActivity extends AppCompatActivity {

    private final List<String> dataset = new ArrayList<>();

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

        RecyclerView recyclerView = findViewById(R.id.my_recycler_view);

        recyclerView.setHasFixedSize(true);
        RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this);
        recyclerView.setLayoutManager(layoutManager);

        int i = 0;
        while(i<20){
            String str = String.format(Locale.US, "Data_0%d",i);
            dataset.add(str);
            i++;
        }

        MyAdapter adapter = new MyAdapter(dataset);
        recyclerView.setAdapter(adapter);

        RecyclerView.ItemDecoration itemDecoration =
                new DividerItemDecoration(this, DividerItemDecoration.VERTICAL);
        recyclerView.addItemDecoration(itemDecoration);

        ItemTouchHelper mIth  = new ItemTouchHelper(
            new ItemTouchHelper.SimpleCallback(ItemTouchHelper.UP | ItemTouchHelper.DOWN ,
                    ItemTouchHelper.LEFT) {

                @Override
                public boolean onMove(@NonNull RecyclerView recyclerView,
                                      @NonNull RecyclerView.ViewHolder viewHolder,
                                      @NonNull RecyclerView.ViewHolder target) {
                    final int fromPos = viewHolder.getBindingAdapterPosition();
                    final int toPos = target.getBindingAdapterPosition();
                    adapter.notifyItemMoved(fromPos, toPos);
                    return true;// true if moved, false otherwise
                }

                @Override
                public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
                }
            });

        mIth.attachToRecyclerView(recyclerView);
    }
}

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//package com.example.testitemtouchhelper;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import androidx.recyclerview.widget.DividerItemDecoration;

import androidx.recyclerview.widget.ItemTouchHelper;

import androidx.recyclerview.widget.RecyclerView;

import androidx.recyclerview.widget.LinearLayoutManager;

import java.util.ArrayList;

import java.util.List;

import java.util.Locale;

import androidx.annotation.NonNull;

public class MainActivity extends AppCompatActivity {

private final List<String> dataset = new ArrayList<>();

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

RecyclerView recyclerView = findViewById(R.id.my_recycler_view);

recyclerView.setHasFixedSize(true);

RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this);

recyclerView.setLayoutManager(layoutManager);

int i = 0;

while(i<20){

String str = String.format(Locale.US, "Data_0%d",i);

dataset.add(str);

i++;

}

MyAdapter adapter = new MyAdapter(dataset);

recyclerView.setAdapter(adapter);

RecyclerView.ItemDecoration itemDecoration =

new DividerItemDecoration(this, DividerItemDecoration.VERTICAL);

recyclerView.addItemDecoration(itemDecoration);

ItemTouchHelper mIth = new ItemTouchHelper(

new ItemTouchHelper.SimpleCallback(ItemTouchHelper.UP | ItemTouchHelper.DOWN ,

ItemTouchHelper.LEFT) {

@Override

public boolean onMove(@NonNull RecyclerView recyclerView,

@NonNull RecyclerView.ViewHolder viewHolder,

@NonNull RecyclerView.ViewHolder target) {

final int fromPos = viewHolder.getBindingAdapterPosition();

final int toPos = target.getBindingAdapterPosition();

adapter.notifyItemMoved(fromPos, toPos);

return true;// true if moved, false otherwise

}

@Override

public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {

}

});

mIth.attachToRecyclerView(recyclerView);

}

//package com.example.testitemtouchhelper;

import androidx.recyclerview.widget.RecyclerView;
import androidx.annotation.NonNull;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.util.List;

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {

    private final List<String> dataArray;

    static class ViewHolder extends RecyclerView.ViewHolder {

        TextView textView;

        public ViewHolder(View view) {
            super(view);
            textView = view.findViewById(R.id.text_view);
        }

    }

    MyAdapter(List<String> dataset) {
        dataArray = dataset;
    }

    // Create new views (invoked by the layout manager)
    @Override
    @NonNull
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        // create a new view
        View view = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.my_text_view, parent, false);

        return new ViewHolder(view);
    }

    // Replace the contents of a view (invoked by the layout manager)
    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        // - get element from your dataset at this position
        // - replace the contents of the view with that element
        holder.textView.setText(dataArray.get(position));
    }

    // Return the size of your dataset (invoked by the layout manager)
    @Override
    public int getItemCount() {
        return dataArray.size();
    }
}

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//package com.example.testitemtouchhelper;

import androidx.recyclerview.widget.RecyclerView;

import androidx.annotation.NonNull;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.TextView;

import java.util.List;

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {

private final List<String> dataArray;

static class ViewHolder extends RecyclerView.ViewHolder {

TextView textView;

public ViewHolder(View view) {

super(view);

textView = view.findViewById(R.id.text_view);

}

MyAdapter(List<String> dataset) {

dataArray = dataset;

}

// Create new views (invoked by the layout manager)

@Override

@NonNull

public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

// create a new view

View view = LayoutInflater.from(parent.getContext())

.inflate(R.layout.my_text_view, parent, false);

return new ViewHolder(view);

}

// Replace the contents of a view (invoked by the layout manager)

@Override

public void onBindViewHolder(@NonNull ViewHolder holder, int position) {

// - get element from your dataset at this position

// - replace the contents of the view with that element

holder.textView.setText(dataArray.get(position));

}

// Return the size of your dataset (invoked by the layout manager)

@Override

public int getItemCount() {

return dataArray.size();

}

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <!-- A RecyclerView with some commonly used attributes -->
    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/my_recycler_view"
        android:scrollbars="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

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<?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:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MainActivity">

<androidx.recyclerview.widget.RecyclerView

android:id="@+id/my_recycler_view"

android:scrollbars="vertical"

android:layout_width="match_parent"

android:layout_height="match_parent"

app:layout_constraintBottom_toBottomOf="parent"

app:layout_constraintLeft_toLeftOf="parent"

app:layout_constraintRight_toRightOf="parent"

app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <TextView
        android:id="@+id/text_view"
        android:layout_width="wrap_content"
        android:layout_height="50dp" />

</LinearLayout>

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<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="wrap_content">

<TextView

android:id="@+id/text_view"

android:layout_width="wrap_content"

android:layout_height="50dp" />

</LinearLayout>

apply plugin: 'com.android.application'

android {
    ...
}

dependencies {
    ...
    implementation 'androidx.recyclerview:recyclerview:1.2.1'
}

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apply plugin: 'com.android.application'

android {

...

}

dependencies {

...

implementation 'androidx.recyclerview:recyclerview:1.2.1'

}

//package com.example.testitemtouchhelper2;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import androidx.recyclerview.widget.DividerItemDecoration;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.ItemTouchHelper;
import androidx.recyclerview.widget.LinearLayoutManager;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Locale;

public class MainActivity extends AppCompatActivity {

    private static final String[] names = {
            "katakuriko", "kurumi", "mai",
            "miki", "nagi", "saya",
            "toko", "yuka", "yumiko", "yuyu"
    };

    // それぞれの画像ファイルをdarawableに入れます
    // ArrayListにコピーするためintからInteger型にしました
    private static final Integer[] photos = {
            R.drawable.katakuriko, R.drawable.kurumi,
            R.drawable.mai, R.drawable.miki,
            R.drawable.nagi, R.drawable.saya,
            R.drawable.toko, R.drawable.yuka,
            R.drawable.yumiko, R.drawable.yuyu
    };

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

        RecyclerView recyclerView = findViewById(R.id.my_recycler_view);

        // use this setting to improve performance if you know that changes
        // in content do not change the layout size of the RecyclerView
        recyclerView.setHasFixedSize(true);

        // use a linear layout manager
        RecyclerView.LayoutManager rLayoutManager = new LinearLayoutManager(this);

        recyclerView.setLayoutManager(rLayoutManager);


        // 配列をArrayListにコピー
        List<String> itemNames = new ArrayList<>(Arrays.asList(names));
        List<Integer> itemImages = new ArrayList<>(Arrays.asList(photos));
        List<String> itemEmails = new ArrayList<>();

        for(String s : itemNames){
            String str = String.format(Locale.ENGLISH, "%s@gmail.com", s);
            itemEmails.add(str);
        }

        // specify an adapter (see also next example)
        MyAdapter adapter = new MyAdapter(itemImages, itemNames, itemEmails);
        recyclerView.setAdapter(adapter);

        RecyclerView.ItemDecoration itemDecoration =
                new DividerItemDecoration(this, DividerItemDecoration.VERTICAL);
        recyclerView.addItemDecoration(itemDecoration);

        ItemTouchHelper itemTouchHelper = new ItemTouchHelper(
                new ItemTouchHelper.SimpleCallback(ItemTouchHelper.UP | ItemTouchHelper.DOWN,
                         ItemTouchHelper.ACTION_STATE_IDLE) {
                    @Override
                    public boolean onMove(@NonNull RecyclerView recyclerView,
                                          @NonNull RecyclerView.ViewHolder viewHolder,
                                          @NonNull RecyclerView.ViewHolder target) {
                        final int fromPos = viewHolder.getAbsoluteAdapterPosition();
                        final int toPos = target.getAbsoluteAdapterPosition();
                        adapter.notifyItemMoved(fromPos, toPos);
                        return true;
                    }

                    @Override
                    public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {

                   }
                });
        itemTouchHelper.attachToRecyclerView(recyclerView);
    }
}

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//package com.example.testitemtouchhelper2;

import androidx.annotation.NonNull;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import androidx.recyclerview.widget.DividerItemDecoration;

import androidx.recyclerview.widget.RecyclerView;

import androidx.recyclerview.widget.ItemTouchHelper;

import androidx.recyclerview.widget.LinearLayoutManager;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import java.util.Locale;

public class MainActivity extends AppCompatActivity {

private static final String[] names = {

"katakuriko", "kurumi", "mai",

"miki", "nagi", "saya",

"toko", "yuka", "yumiko", "yuyu"

};

// それぞれの画像ファイルをdarawableに入れます

// ArrayListにコピーするためintからInteger型にしました

private static final Integer[] photos = {

R.drawable.katakuriko, R.drawable.kurumi,

R.drawable.mai, R.drawable.miki,

R.drawable.nagi, R.drawable.saya,

R.drawable.toko, R.drawable.yuka,

R.drawable.yumiko, R.drawable.yuyu

};

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

RecyclerView recyclerView = findViewById(R.id.my_recycler_view);

// use this setting to improve performance if you know that changes

// in content do not change the layout size of the RecyclerView

recyclerView.setHasFixedSize(true);

// use a linear layout manager

RecyclerView.LayoutManager rLayoutManager = new LinearLayoutManager(this);

recyclerView.setLayoutManager(rLayoutManager);

// 配列をArrayListにコピー

List<String> itemNames = new ArrayList<>(Arrays.asList(names));

List<Integer> itemImages = new ArrayList<>(Arrays.asList(photos));

List<String> itemEmails = new ArrayList<>();

for(String s : itemNames){

String str = String.format(Locale.ENGLISH, "%s@gmail.com", s);

itemEmails.add(str);

}

// specify an adapter (see also next example)

MyAdapter adapter = new MyAdapter(itemImages, itemNames, itemEmails);

recyclerView.setAdapter(adapter);

RecyclerView.ItemDecoration itemDecoration =

new DividerItemDecoration(this, DividerItemDecoration.VERTICAL);

recyclerView.addItemDecoration(itemDecoration);

ItemTouchHelper itemTouchHelper = new ItemTouchHelper(

new ItemTouchHelper.SimpleCallback(ItemTouchHelper.UP | ItemTouchHelper.DOWN,

ItemTouchHelper.ACTION_STATE_IDLE) {

@Override

public boolean onMove(@NonNull RecyclerView recyclerView,

@NonNull RecyclerView.ViewHolder viewHolder,

@NonNull RecyclerView.ViewHolder target) {

final int fromPos = viewHolder.getAbsoluteAdapterPosition();

final int toPos = target.getAbsoluteAdapterPosition();

adapter.notifyItemMoved(fromPos, toPos);

return true;

}

@Override

public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {

}

});

itemTouchHelper.attachToRecyclerView(recyclerView);

}

//package com.example.testitemtouchhelper2;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.List;

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {

    private final List<Integer> iImages;
    private final List<String> iNames;
    private final List<String> iEmails;

    // Provide a reference to the views for each data item
    // Complex data items may need more than one view per item, and
    // you provide access to all the views for a data item in a view holder
    static class ViewHolder extends RecyclerView.ViewHolder {

        // each data item is just a string in this case
        ImageView imageView;
        TextView textView;
        TextView emailView;

        ViewHolder(View v) {
            super(v);
            imageView = v.findViewById(R.id.image_view);
            textView = v.findViewById(R.id.text_view);
            emailView = v.findViewById(R.id.email_view);
        }
    }

    // Provide a suitable constructor (depends on the kind of dataset)
    MyAdapter(List<Integer> itemImages, List<String> itemNames, List<String> itemEmails) {
        this.iImages = itemImages;
        this.iNames = itemNames;
        this.iEmails = itemEmails;
    }

    // Create new views (invoked by the layout manager)
    @Override
    @NonNull
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        // create a new view
        View view = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.my_text_view, parent, false);

        // set the view's size, margins, paddings and layout parameters

        return new ViewHolder(view);
    }

    // Replace the contents of a view (invoked by the layout manager)
    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        // - get element from your dataset at this position
        // - replace the contents of the view with that element
        holder.imageView.setImageResource(iImages.get(position));
        holder.textView.setText(iNames.get(position));
        holder.emailView.setText(iEmails.get(position));    }

    // Return the size of your dataset (invoked by the layout manager)
    @Override
    public int getItemCount() {
        return iNames.size();
    }
}

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//package com.example.testitemtouchhelper2;

import androidx.annotation.NonNull;

import androidx.recyclerview.widget.RecyclerView;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ImageView;

import android.widget.TextView;

import java.util.List;

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {

private final List<Integer> iImages;

private final List<String> iNames;

private final List<String> iEmails;

// Provide a reference to the views for each data item

// Complex data items may need more than one view per item, and

// you provide access to all the views for a data item in a view holder

static class ViewHolder extends RecyclerView.ViewHolder {

// each data item is just a string in this case

ImageView imageView;

TextView textView;

TextView emailView;

ViewHolder(View v) {

super(v);

imageView = v.findViewById(R.id.image_view);

textView = v.findViewById(R.id.text_view);

emailView = v.findViewById(R.id.email_view);

}

// Provide a suitable constructor (depends on the kind of dataset)

MyAdapter(List<Integer> itemImages, List<String> itemNames, List<String> itemEmails) {

this.iImages = itemImages;

this.iNames = itemNames;

this.iEmails = itemEmails;

}

// Create new views (invoked by the layout manager)

@Override

@NonNull

public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

// create a new view

View view = LayoutInflater.from(parent.getContext())

.inflate(R.layout.my_text_view, parent, false);

// set the view's size, margins, paddings and layout parameters

return new ViewHolder(view);

}

// Replace the contents of a view (invoked by the layout manager)

@Override

public void onBindViewHolder(@NonNull ViewHolder holder, int position) {

// - get element from your dataset at this position

// - replace the contents of the view with that element

holder.imageView.setImageResource(iImages.get(position));

holder.textView.setText(iNames.get(position));

holder.emailView.setText(iEmails.get(position)); }

// Return the size of your dataset (invoked by the layout manager)

@Override

public int getItemCount() {

return iNames.size();

}

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <!-- A RecyclerView with some commonly used attributes -->
    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/my_recycler_view"
        android:scrollbars="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

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<?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:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MainActivity">

<androidx.recyclerview.widget.RecyclerView

android:id="@+id/my_recycler_view"

android:scrollbars="vertical"

android:layout_width="match_parent"

android:layout_height="match_parent"

app:layout_constraintBottom_toBottomOf="parent"

app:layout_constraintLeft_toLeftOf="parent"

app:layout_constraintRight_toRightOf="parent"

app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:paddingLeft="20dp"
    android:paddingTop="5dp"
    android:paddingRight="20dp"
    android:paddingBottom="5dp"
    android:background="#fac"
    android:baselineAligned="false"
    android:layout_height="wrap_content">

    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

        <!-- 枠を入れるだけで深い意味はありません -->
        <ImageView
            android:background="#f44"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:contentDescription="@string/description1"/>

        <ImageView
            android:id="@+id/image_view"
            android:layout_margin="2dp"
            android:layout_width="96dp"
            android:layout_height="96dp"
            android:contentDescription="@string/description2"/>

    </RelativeLayout>

    <LinearLayout
        android:orientation="vertical"
        android:background="#cef"
        android:layout_weight="1"
        android:layout_width="0dp"
        android:layout_height="match_parent">

        <TextView
            android:id="@+id/text_view"
            android:textSize="24sp"
            android:textColor="#00f"
            android:paddingStart="20dp"
            android:paddingEnd="10dp"
            android:paddingTop="20dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

        <TextView
            android:id="@+id/email_view"
            android:textSize="18sp"
            android:paddingStart="20dp"
            android:paddingEnd="10dp"
            android:layout_gravity="center_vertical"
            android:autoLink="email"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </LinearLayout>

</LinearLayout>

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<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="horizontal"

android:layout_width="match_parent"

android:paddingLeft="20dp"

android:paddingTop="5dp"

android:paddingRight="20dp"

android:paddingBottom="5dp"

android:background="#fac"

android:baselineAligned="false"

android:layout_height="wrap_content">

<RelativeLayout

android:layout_width="wrap_content"

android:layout_height="wrap_content">

<ImageView

android:background="#f44"

android:layout_width="100dp"

android:layout_height="100dp"

android:contentDescription="@string/description1"/>

<ImageView

android:id="@+id/image_view"

android:layout_margin="2dp"

android:layout_width="96dp"

android:layout_height="96dp"

android:contentDescription="@string/description2"/>

</RelativeLayout>

<LinearLayout

android:orientation="vertical"

android:background="#cef"

android:layout_weight="1"

android:layout_width="0dp"

android:layout_height="match_parent">

<TextView

android:id="@+id/text_view"

android:textSize="24sp"

android:textColor="#00f"

android:paddingStart="20dp"

android:paddingEnd="10dp"

android:paddingTop="20dp"

android:layout_width="wrap_content"

android:layout_height="wrap_content" />

<TextView

android:id="@+id/email_view"

android:textSize="18sp"

android:paddingStart="20dp"

android:paddingEnd="10dp"

android:layout_gravity="center_vertical"

android:autoLink="email"

android:layout_width="wrap_content"

android:layout_height="wrap_content" />

</LinearLayout>

<resources>
    <string name="app_name">Your App Name</string>
    <string name="description1">background</string>
    <string name="description2">picture</string>
</resources>

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<string name="description1">background</string>

<string name="description2">picture</string>

</resources>

[Android] RecyclerViewとItemTouchHelperでドラッグ&ドロップ

RecycleView & ItemTouchHelper

基本のItemTouchHelper

画像・テキストリストでのItemTouchHelper