it Hilfe der SQLite-Datenbank habe ich den Namen des Cricket-Spielers hinzugefügt und zum Schluss werden die Namen in der Listenansicht angezeig

Ich habe die Schaltfläche "Aktualisieren" und "Löschen" in CustomCursorAdapter.java hinzugefügt. Nachstehend ist der Adaptercode dafür angegeben:

CustomCursorAdapter.java:

import android.content.Context;
import android.database.Cursor;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.CursorAdapter;
import android.widget.TextView;

public class CustomCursorAdapter extends CursorAdapter {

    public CustomCursorAdapter(Context context, Cursor c) {
        super(context, c);
    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {
        // when the view will be created for first time,
        // we need to tell the adapters, how each item will look
        LayoutInflater inflater = LayoutInflater.from(parent.getContext());
        View retView = inflater.inflate(R.layout.single_row_item, parent, false);

        return retView;
    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {
        // here we are setting our data
        // that means, take the data from the cursor and put it in views

        TextView textViewPersonName = (TextView) view.findViewById(R.id.tv_person_name);
        textViewPersonName.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(1))));

      //Handle buttons and add onClickListeners
        Button deleteBtn = (Button)view.findViewById(R.id.delete_btn);
        Button updateBtn = (Button)view.findViewById(R.id.update_btn);

        deleteBtn.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v) { 

                notifyDataSetChanged();
            }
        });  

        updateBtn.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v) { 
                //do something

                notifyDataSetChanged();
            }
        });        
    }
}  

single_row_item.xml:

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

    <Button
        android:id="@+id/update_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_toLeftOf="@+id/delete_btn"
        android:text="Update" />

    <Button
        android:id="@+id/delete_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:text="Delete" />

    <TextView
        android:id="@+id/tv_person_name"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/add_btn"
        android:layout_alignBottom="@+id/add_btn"
        android:layout_alignParentLeft="true"
        android:paddingBottom="5dp"
        android:text="Sample Data"
        android:textSize="15sp" />

</RelativeLayout>

PersonDatabaseHelper.java:

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

public class PersonDatabaseHelper {

    private static final String TAG = PersonDatabaseHelper.class.getSimpleName();

    // database configuration
    // if you want the onUpgrade to run then change the database_version
    private static final int DATABASE_VERSION = 1;
    private static final String DATABASE_NAME = "mydatabase.db";

    // table configuration
    private static final String TABLE_NAME = "person_table";         // Table name
    private static final String PERSON_TABLE_COLUMN_ID = "_id";     // a column named "_id" is required for cursor
    private static final String PERSON_TABLE_COLUMN_NAME = "person_name";
    private static final String PERSON_TABLE_COLUMN_PIN = "person_pin";

    private DatabaseOpenHelper openHelper;
    private SQLiteDatabase database;

    // this is a wrapper class. that means, from outside world, anyone will communicate with PersonDatabaseHelper,
    // but under the hood actually DatabaseOpenHelper class will perform database CRUD operations 
    public PersonDatabaseHelper(Context aContext) {

        openHelper = new DatabaseOpenHelper(aContext);
        database = openHelper.getWritableDatabase();
    }

    public void insertData (String aPersonName, String aPersonPin) {

        // we are using ContentValues to avoid sql format errors

        ContentValues contentValues = new ContentValues();

        contentValues.put(PERSON_TABLE_COLUMN_NAME, aPersonName);
        contentValues.put(PERSON_TABLE_COLUMN_PIN, aPersonPin);

        database.insert(TABLE_NAME, null, contentValues);
    }

    public Cursor getAllData () {

        String buildSQL = "SELECT * FROM " + TABLE_NAME;

        Log.d(TAG, "getAllData SQL: " + buildSQL);

        return database.rawQuery(buildSQL, null);
    }

    // this DatabaseOpenHelper class will actually be used to perform database related operation 

    private class DatabaseOpenHelper extends SQLiteOpenHelper {

        public DatabaseOpenHelper(Context aContext) {
            super(aContext, DATABASE_NAME, null, DATABASE_VERSION);
        }

        @Override
        public void onCreate(SQLiteDatabase sqLiteDatabase) {
            // Create your tables here

            String buildSQL = "CREATE TABLE " + TABLE_NAME + "( " + PERSON_TABLE_COLUMN_ID + " INTEGER PRIMARY KEY, " +
                    PERSON_TABLE_COLUMN_NAME + " TEXT, " + PERSON_TABLE_COLUMN_PIN + " TEXT )";

            Log.d(TAG, "onCreate SQL: " + buildSQL);

            sqLiteDatabase.execSQL(buildSQL);
        }

        @Override
        public void onUpgrade(SQLiteDatabase sqLiteDatabase, int oldVersion, int newVersion) {
            // Database schema upgrade code goes here

            String buildSQL = "DROP TABLE IF EXISTS " + TABLE_NAME;

            Log.d(TAG, "onUpgrade SQL: " + buildSQL);

            sqLiteDatabase.execSQL(buildSQL);       // drop previous table

            onCreate(sqLiteDatabase);               // create the table from the beginning
        }
    }
}

Ausgabe

In diesem Screenshot wird die Schaltfläche "Aktualisieren" und "Löschen" angezeigt. Wenn ich auf die Schaltfläche "Aktualisieren" klicke, wird ein Warndialog angezeigt, und der Name der angegebenen Listenansicht wird bearbeitet und angezeigt.

Wenn ich dann auf die Schaltfläche Löschen klicke, muss die entsprechende Listenansichtszeile gelöscht werden.

Jeder kann mir dabei helfen. Danke.