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list.getChildAt(1).setEnabled(false); / ListView item disable
ÃÖ±æÈ£ [LIST]   2023-03-29 13:43:44, Á¶È¸ : 106

package com.gilho.listviewapp;

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    static ListView list;
    static ArrayAdapter adapter;
    static List data;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        list = (ListView) findViewById(R.id.list);
        data = new ArrayList<>();
        adapter = new ArrayAdapter(getApplicationContext(),android.R.layout.simple_list_item_checked,data);
        list.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
        list.setAdapter(adapter);
        list.setClickable(true);
        data.add("test1=========");
        data.add("test2=========");
        adapter.setNotifyOnChange(true);

        Button button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                listUpdate();
                adapter.notifyDataSetChanged();
            }
        });

    }
    public void listUpdate() {
        data.add("update");
        // list.setAdapter(adapter);
        // java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setEnabled(boolean)' on a null object reference
        list.getChildAt(1).setEnabled(false);
    }
}
216.73.216.200


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