Android 浅谈MatrixCursor

package com.test.matrixcursor;

import android.app.ListActivity;
import android.database.MatrixCursor;
import android.os.Bundle;
import android.support.v4.widget.SimpleCursorAdapter;
import android.view.View;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivity extends ListActivity {
     private static final String[] COLUMN_NAME = { "_id", "name", "price" };
     private MatrixCursor matrixCursor;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
           createList();
           //createList2();
     }

     private void createList() {
          matrixCursor = new MatrixCursor(COLUMN_NAME, 1);
          startManagingCursor(matrixCursor);

          matrixCursor.addRow(new Object[] { R.drawable.ic_launcher, "zhangsan",
                    39 });
          matrixCursor
                    .addRow(new Object[] { R.drawable.ic_launcher, "lisi", 40 });
          matrixCursor
                    .addRow(new Object[] { R.drawable.ic_launcher, "wangwu", 41 });

          matrixCursor.addRow(new Object[] { R.drawable.ic_launcher, "zhaoliu",
                    42 });
          matrixCursor
                    .addRow(new Object[] { R.drawable.ic_launcher, "sunqi", 43 });

          setListAdapter(new SimpleCursorAdapter(this, R.layout.activity_main,
                    matrixCursor, COLUMN_NAME, new int[] { R.id.icon, R.id.name,
                              R.id.price }));
     }

     private void createList2() {
          matrixCursor = new MatrixCursor(COLUMN_NAME, 1);
          startManagingCursor(matrixCursor);

          MatrixCursor.RowBuilder builder1 = matrixCursor.newRow();
          builder1.add(R.drawable.ic_launcher);
          builder1.add("zhangsan");
          builder1.add(39);

          MatrixCursor.RowBuilder builder2 = matrixCursor.newRow();
          builder2.add(R.drawable.ic_launcher);
          builder2.add("lisi");
          builder2.add(40);

          MatrixCursor.RowBuilder builder3 = matrixCursor.newRow();
          builder3.add(R.drawable.ic_launcher);
          builder3.add("wangwu");
          builder3.add(41);

          setListAdapter(new SimpleCursorAdapter(this, R.layout.activity_main,
                    matrixCursor, COLUMN_NAME, new int[] { R.id.icon, R.id.name,
                              R.id.price }));
     }

     @Override
     protected void onListItemClick(ListView l, View v, int position, long id) {
          super.onListItemClick(l, v, position, id);
          matrixCursor.moveToPosition(position);
          StringBuilder builder = new StringBuilder();
          builder.append("Name:")
                    .append(matrixCursor.getString(matrixCursor
                              .getColumnIndex("name"))).append("\n");

          builder.append("Price:")
                    .append(matrixCursor.getString(matrixCursor
                              .getColumnIndex("price"))).append("\n");

          Toast.makeText(getApplicationContext(), builder.toString(), 1000)
                    .show();
     }
}