안드로이드 - toast 클릭 시 클릭한 것 뜨게하기 (여러 개 가능)

- 클릭하면 true/ 클릭해지 시 false가 뜨도록 하기 

 

<activity_main.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"
    tools:context=".MainActivity" >

    <ListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</LinearLayout>

 

<MainActivity.java>

package com.example.listviewtest;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.CheckedTextView;
import android.widget.ListView;
import android.widget.Toast;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    ListView listView;

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

        String[] fruits = {"사과","딸기","바나나","포도","멜론","키위"};

        ArrayAdapter<String>  adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_multiple_choice, fruits);
        listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
        listView.setAdapter(adapter);

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                CheckedTextView v = (CheckedTextView) view;
                boolean currentCheck = v.isChecked();
                String str = String.format("%s", currentCheck);
                Toast.makeText(getApplicationContext(), str, Toast.LENGTH_SHORT).show();
            }
        });

    }
}

 

- 클릭하면 클릭한 리스트 뜨게하기 

ex) 딸기, 바나나 클릭 시 -> 딸기,바나나 선택  

<?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"
    tools:context=".MainActivity" >

    <ListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</LinearLayout>

package com.example.listviewtest;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.CheckedTextView;
import android.widget.ListView;
import android.widget.Toast;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    ListView listView;

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

        String[] fruits = {"사과","딸기","바나나","포도","멜론","키위"};

        ArrayAdapter<String>  adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_multiple_choice, fruits);
        listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
        listView.setAdapter(adapter);

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            String str =""; // 여기나두면 값 누적됨
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                CheckedTextView v = (CheckedTextView) view;
                boolean currentCheck = v.isChecked();

                if(currentCheck == true){
                    str += (fruits[position]+" ");
                }
                else{
                    str = str.replace(String.format("%s ",fruits[position]), ""); // 바꾸고 String에 다시 대입
                }
                Toast.makeText(getApplicationContext(), str+ "선택", Toast.LENGTH_SHORT).show();
            }
        });

    }
}

 

- 추가하면 터미널에서? 과정 볼 수 있음 

private static final String TAG = "MainActivity";

Log.d(TAG, str);

ex) 

package com.example.listviewtest;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.CheckedTextView;
import android.widget.ListView;
import android.widget.Toast;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    ListView listView;
    private static final String TAG = "MainActivity";

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

        String[] fruits = {"사과","딸기","바나나","포도","멜론","키위"};

        ArrayAdapter<String>  adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_multiple_choice, fruits);
        listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
        listView.setAdapter(adapter);

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            String str =""; // 여기나두면 값 누적됨
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                CheckedTextView v = (CheckedTextView) view;
                boolean currentCheck = v.isChecked();

                if(currentCheck == true){
                    str += (fruits[position]+" ");
                }
                else{
                    str = str.replace(String.format("%s ",fruits[position]), ""); // 바꾸고 String에 다시 대입
                }
                Toast.makeText(getApplicationContext(), str+ "선택", Toast.LENGTH_SHORT).show();
                Log.d(TAG, str);
            }
        });

    }
}

 

- 다른 방법 

        ArrayList<String> data = new ArrayList<String> ();

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                if (data.contains(fruits[position])) {
                    data.remove(fruits[position]);
                }
                else {
                    data.add(fruits[position]);
                }
                Toast.makeText(getApplicationContext(), data + " 선택", Toast.LENGTH_SHORT).show();
            }