MyContentProviderActivity.java

 

package com.luofei.cp;

import android.app.Activity;
import android.content.ContentResolver;
import android.database.Cursor;
import android.os.Bundle;
import android.widget.Toast;

public class MyContentProviderActivity extends Activity {
    /** Called when the activity is first created. */
 private MyDataBase dBlite1 = new MyDataBase(this);;
    private ContentResolver contentResolver;
    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    //先对数据库进行添加数据
    dBlite1.add("123@gmail.com","luofei","1220","male");
    dBlite1.add("345@gmail.com","zhangsan","1220","female");
    //通过contentResolver进行查找
    contentResolver = MyContentProviderActivity.this.getContentResolver();
    Cursor cursor = contentResolver.query(Utils.CONTENT_URI,
               new String[] {Utils.EMAIL, Utils.USERNAME,Utils.DATE,Utils.SEX },
               null, null, null);
    while (cursor.moveToNext()) {
     Toast.makeText(
        MyContentProviderActivity.this,
        cursor.getString(cursor.getColumnIndex(Utils.EMAIL))
        + " "
        + cursor.getString(cursor.getColumnIndex(Utils.USERNAME))
        + " "
        + cursor.getString(cursor.getColumnIndex(Utils.DATE))
        + " "
        + cursor.getString(cursor.getColumnIndex(Utils.SEX)),
        Toast.LENGTH_SHORT).show();
        }
        startManagingCursor(cursor);  //查找后关闭游标
    }
}