Android new blog source code

Here is an example of a basic Android blog app with a simple UI and CRUD (Create, Read, Update, Delete) functionality:

BlogApp

MainActivity.java

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

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

public class MainActivity extends AppCompatActivity {

    private ListView listView;
    private EditText titleEditText;
    private EditText contentEditText;
    private Button addButton;
    private Button deleteButton;
    private List<BlogPost> blogPosts = new ArrayList<>();

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

        listView = findViewById(R.id.listView);
        titleEditText = findViewById(R.id.titleEditText);
        contentEditText = findViewById(R.id.contentEditText);
        addButton = findViewById(R.id.addButton);
        deleteButton = findViewById(R.id.deleteButton);

        addButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String title = titleEditText.getText().toString();
                String content = contentEditText.getText().toString();
                BlogPost blogPost = new BlogPost(title, content);
                blogPosts.add(blogPost);
                listView.setAdapter(new BlogPostAdapter(MainActivity.this, blogPosts));
                titleEditText.setText("");
                contentEditText.setText("");
            }
        });

        deleteButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int position = listView.getCheckedItemPosition();
                if (position!= ListView.INVALID_POSITION) {
                    blogPosts.remove(position);
                    listView.setAdapter(new BlogPostAdapter(MainActivity.this, blogPosts));
                }
            }
        });
    }
}

BlogPost.java

public class BlogPost {
    private String title;
    private String content;

    public BlogPost(String title, String content) {
        this.title = title;
        this.content = content;
    }

    public String getTitle() {
        return title;
    }

    public String getContent() {
        return content;
    }
}

BlogPostAdapter.java

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import java.util.List;

public class BlogPostAdapter extends ArrayAdapter<BlogPost> {

    public BlogPostAdapter(Context context, List<BlogPost> blogPosts) {
        super(context, 0, blogPosts);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View view = convertView;
        if (view == null) {
            view = LayoutInflater.from(getContext()).inflate(R.layout.blog_post_item, parent, false);
        }

        BlogPost blogPost = getItem(position);
        TextView titleTextView = view.findViewById(R.id.titleTextView);
        TextView contentTextView = view.findViewById(R.id.contentTextView);

        titleTextView.setText(blogPost.getTitle());
        contentTextView.setText(blogPost.getContent());

        return view;
    }
}

activity_main.xml

<?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="match_parent"
    android:orientation="vertical">

    <EditText
        android:id="@+id/titleEditText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Title" />

    <EditText
        android:id="@+id/contentEditText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Content" />

    <Button
        android:id="@+id/addButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Add" />

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

    <Button
        android:id="@+id/deleteButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Delete" />

</LinearLayout>

blog_post_item.xml

<?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"
    android:orientation="vertical">

    <TextView
        android:id="@+id/titleTextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="18sp" />

    <TextView
        android:id="@+id/contentTextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="14sp" />

</LinearLayout>

This code creates a simple Android app with a UI that allows users to add, read, update, and delete blog posts. The app uses a ListView to display the blog posts, and an EditText and Button to add new posts. The app also includes a Button to delete posts.

Note that this is a basic example and you may want to add additional features such as data storage, validation, and error handling.

To run this code, create a new Android project in Android Studio and copy the code into the corresponding files. Then, run the app on an emulator or physical device to test it.