Utilisation d’une ListView

Cet article est la suite de l’article implémentant un Client Androïd REST.

CustomListAdapter.java :

package org.libreapps.rest;

import android.content.Context;
import android.graphics.Color;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import org.libreapps.rest.obj.Product;

import java.util.ArrayList;

public class CustomListAdapter extends BaseAdapter {

    private ArrayList<Product> listData;
    private LayoutInflater layoutInflater;
    private Context context;

    public CustomListAdapter(Context aContext, ArrayList<Product> listData) {
        this.context = aContext;
        this.listData = listData;
        layoutInflater = LayoutInflater.from(aContext);
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {
            convertView = layoutInflater.inflate(R.layout.activity_custom_list_view, null);
            holder = new ViewHolder();
            holder.id = (TextView) convertView.findViewById(R.id.textId);
            holder.name = (TextView) convertView.findViewById(R.id.textName);
            holder.type = (TextView) convertView.findViewById(R.id.textType);
            holder.price = (TextView) convertView.findViewById(R.id.textPrice);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
            Log.v("position",""+position);
        }

        if(position % 2 == 0){
            convertView.setBackgroundColor(Color.rgb(150,245,170));
        }

        Product product = this.listData.get(position);
        holder.id.setText(""+product.getId());
        holder.name.setText(product.getName());
        holder.type.setText(product.getType());
        holder.price.setText(""+product.getPrice());
        Log.v("CUSTOM",""+product.getName()+" "+product.getType());

        return convertView;
    }

    static class ViewHolder {
        TextView id;
        TextView name;
        TextView type;
        TextView price;
    }

    public int getCount() {
        return (listData!=null)?listData.size():0;
    }
    public Object getItem(int position) {
        return listData.get(position);
    }
    public long getItemId(int position) {
        return position;
    }
}

MainActivity.java :

package org.libreapps.rest;

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

import com.google.android.material.floatingactionbutton.FloatingActionButton;

import androidx.appcompat.app.AppCompatActivity;

import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.AdapterView;
import android.widget.ListView;

import org.libreapps.rest.obj.Product;

import java.util.ArrayList;
import java.util.concurrent.ExecutionException;


public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
     
        ArrayList<Product> listData = getListData();
        final ListView listView = (ListView) findViewById(R.id.listView);
        listView.setAdapter(new CustomListAdapter(this, listData));

        // When the user clicks on the ListItem
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> a, View v, int position, long id) {
                Object o = listView.getItemAtPosition(position);
                Product upload = (Product) o;
                Intent intent = new Intent(MainActivity.this, EditActivity.class);
                intent.putExtra("id", upload.getId());
                intent.putExtra("name", upload.getName());
                intent.putExtra("type", upload.getType());
                intent.putExtra("price", upload.getPrice());
                startActivity(intent);
            }
        });

        FloatingActionButton fab = findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(MainActivity.this, EditActivity.class);
                startActivity(intent);
            }
        });
    }

    public ArrayList<Product> getListData(){
        try{
            ConnectionRest connectionRest = new ConnectionRest();
            connectionRest.execute("GET");
            String listJsonObjs = connectionRest.get();
            if(listJsonObjs != null) {
                return connectionRest.parse(listJsonObjs);
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        }
        return null;
    }
}

Activity_custom_list_view.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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:maxHeight="45dp">

    <TextView
        android:id="@+id/textId"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:layout_marginLeft="16dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="16dp"
        android:layout_marginRight="16dp"
        android:layout_marginBottom="8dp"
        android:gravity="center_vertical|start"
        android:text="ID"
        android:textSize="12sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/textName"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/textName"
        android:layout_width="250dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="16dp"
        android:layout_marginRight="16dp"
        android:layout_marginBottom="8dp"
        android:gravity="center_vertical|start"
        android:text="Name"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/textType"
        app:layout_constraintStart_toEndOf="@+id/textId"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/textPrice"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="34dp"
        android:layout_marginRight="34dp"
        android:layout_marginBottom="8dp"
        android:text="Price"
        android:textSize="12sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/textType"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/textType"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="16dp"
        android:layout_marginRight="16dp"
        android:layout_marginBottom="8dp"
        android:text="Type"
        android:textSize="12sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/textPrice"
        app:layout_constraintStart_toEndOf="@+id/textName"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

EditActivity.java :

package org.libreapps.rest;

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

import androidx.appcompat.app.AppCompatActivity;

import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import org.json.JSONException;
import org.json.JSONObject;

public class EditActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_edit);
        final int id = getIntent().getIntExtra("id", 0);
        String name = getIntent().getStringExtra("name");
        String type = getIntent().getStringExtra("type");
        double price = getIntent().getDoubleExtra("price", 1.0);
        final EditText nameEditTxt = (EditText) findViewById(R.id.nameEditTxt);
        final EditText typeEditTxt = (EditText) findViewById(R.id.typeEditTxt);
        final EditText priceEditTxt = (EditText) findViewById(R.id.priceEditTxt);
        TextView idTxt = (TextView) findViewById(R.id.textview_id);
        Button buttonCancel = (Button) findViewById(R.id.button_cancel);
        Button buttonOk = (Button) findViewById(R.id.button_ok);

        if(id!=0){
            idTxt.setText(""+id);
            nameEditTxt.setText(name);
            typeEditTxt.setText(type);
            priceEditTxt.setText(""+price);
            buttonCancel.setText("Supprimer");
            buttonOk.setText("Modifier");
        }

        buttonCancel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
            if(id!=0){ // Suppression
                try {
                    ConnectionRest connectionRest = new ConnectionRest();
                    JSONObject product = new JSONObject();
                    product.put("id", id);
                    connectionRest.setObj(product);
                    connectionRest.execute("DELETE");
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
            Intent intent = new Intent(EditActivity.this, MainActivity.class);
            startActivity(intent);
            }
        });

        buttonOk.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
            try {
                ConnectionRest connectionRest = new ConnectionRest();
                JSONObject product = new JSONObject();
                if(id!=0) {
                    product.put("id", id);
                }
                product.put("name", nameEditTxt.getText().toString());
                product.put("type", typeEditTxt.getText().toString());
                product.put("price", Double.parseDouble(priceEditTxt.getText().toString()));
                connectionRest.setObj(product);

                if(id!=0) { // Modification
                    connectionRest.execute("PUT");
                }else{ // Creation
                    connectionRest.execute("POST");
                }
                Intent intent = new Intent(EditActivity.this, MainActivity.class);
                startActivity(intent);
            } catch (JSONException e) {
                e.printStackTrace();
            }
            }
        });
    }
}

activity_edit.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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".EditActivity">

    <TableLayout
        android:id="@+id/tableLayout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.0">

        <TableRow
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <TextView
                android:id="@+id/textview_lbid"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="ID"
                android:textSize="14sp" />

            <TextView
                android:id="@+id/textview_id"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:paddingTop="40px"
                android:text="ID"
                android:textSize="14sp" />

        </TableRow>

        <TableRow
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <TextView
                android:id="@+id/textview_name"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Nom :"
                android:textSize="14sp" />

            <EditText
                android:id="@+id/nameEditTxt"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:ems="10"
                android:inputType="textPersonName"
                android:text="Nom"
                android:textSize="14sp" />
        </TableRow>

        <TableRow
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <TextView
                android:id="@+id/textview_type"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Type :"
                android:textSize="14sp" />

            <EditText
                android:id="@+id/typeEditTxt"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:ems="10"
                android:inputType="textPersonName"
                android:text="Type"
                android:textSize="14sp" />
        </TableRow>

        <TableRow
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <TextView
                android:id="@+id/textview_price"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Prix :"
                android:textSize="14sp" />

            <EditText
                android:id="@+id/priceEditTxt"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:ems="10"
                android:inputType="numberDecimal"
                android:text="1.0"
                android:textSize="14sp" />
        </TableRow>

    </TableLayout>

    <Button
        android:id="@+id/button_cancel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="24dp"
        android:text="Annuler"
        app:layout_constraintEnd_toStartOf="@+id/button_ok"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/tableLayout" />

    <Button
        android:id="@+id/button_ok"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="24dp"
        android:layout_marginLeft="24dp"
        android:layout_marginTop="24dp"
        android:text="Créer"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/button_cancel"
        app:layout_constraintTop_toBottomOf="@+id/tableLayout" />
</androidx.constraintlayout.widget.ConstraintLayout>

La suite : Utilisation d’un Client Androïd JWT

Code source : https://github.com/emunier/Rest-listview.git

Source :
https://www.youtube.com/watch?v=Mja5YoL9Jak