Android组件系列----ContentProvider内容提供者【4】

  1 package com.example.contentresolvertest;
  2 
  3 import android.content.ContentResolver;
  4 import android.content.ContentValues;
  5 import android.database.Cursor;
  6 import android.net.Uri;
  7 import android.os.Bundle;
  8 import android.test.AndroidTestCase;
  9 import android.util.Log;
 10 
 11 public class MyTest extends AndroidTestCase {
 12 
 13     public MyTest() {
 14         // TODO Auto-generated constructor stub
 15 
 16     }
 17 
 18     public void calltest() {
 19         ContentResolver contentResolver = getContext().getContentResolver();
 20         Uri uri = Uri
 21                 .parse("content://com.example.contentprovidertest01.PersonContentProvider/person");
 22         Bundle bundle = contentResolver.call(uri, "method", null, null);
 23         String returnCall = bundle.getString("returnCall");
 24         Log.i("main", "-------------->" + returnCall);
 25     }
 26 
 27     //測试方法：向数据库中加入记录。假设之前没有数据库，则会自己主动创建
 28     public void insert() {
 29         // 使用内容解析者ContentResolver訪问内容提供者ContentProvider
 30         ContentResolver contentResolver = getContext().getContentResolver();
 31         ContentValues values = new ContentValues();
 32         values.put("name", "生命贰号");
 33         values.put("address", "湖北");
 34         // content://authorities/person
 35         // http://
 36         Uri uri = Uri
 37                 .parse("content://com.example.contentprovidertest01.PersonContentProvider/person");
 38         contentResolver.insert(uri, values);
 39     }
 40 
 41     //測试方法：删除单条记录。假设要删除全部记录：content://com.example.contentprovidertest01.PersonContentProvider/person
 42     public void delete() {
 43         ContentResolver contentResolver = getContext().getContentResolver();
 44         Uri uri = Uri
 45                 .parse("content://com.example.contentprovidertest01.PersonContentProvider/person/2");//删除id为1的记录
 46         contentResolver.delete(uri, null, null);
 47     }
 48 
 49     //測试方法：依据条件删除记录。
 50     public void deletes() {
 51         ContentResolver contentResolver = getContext().getContentResolver();
 52         Uri uri = Uri
 53                 .parse("content://com.example.contentprovidertest01.PersonContentProvider/person");
 54         String where = "address=?"; 
 55         String[] where_args = { "HK" };
 56         contentResolver.delete(uri, where, where_args);  //第二个參数表示查询的条件"address=?
"，第三个參数表示占位符中的详细内容
 57     }
 58 
 59     //方法：依据id改动记录。注：非常少有批量改动的情况。
 60     public void update() {
 61         ContentResolver contentResolver = getContext().getContentResolver();
 62         Uri uri = Uri
 63                 .parse("content://com.example.contentprovidertest01.PersonContentProvider/person/2");
 64         ContentValues values = new ContentValues();
 65         values.put("name", "李四");
 66         values.put("address", "上海");
 67         contentResolver.update(uri, values, null, null);
 68     }
 69 
 70     //方法：依据条件来改动记录。
 71     public void updates() {
 72         ContentResolver contentResolver = getContext().getContentResolver();
 73         Uri uri = Uri
 74                 .parse("content://com.example.contentprovidertest01.PersonContentProvider/person/student");
 75         ContentValues values = new ContentValues();
 76         values.put("name", "王五");
 77         values.put("address", "深圳");
 78         String where = "address=?";
 79         String[] where_args = { "beijing" };
 80         contentResolver.update(uri, values, where, where_args);
 81     }
 82 
 83     //測试方法：查询全部记录。假设要查询单条记录：content://com.example.contentprovidertest01.PersonContentProvider/person/1
 84     public void query() {
 85         ContentResolver contentResolver = getContext().getContentResolver();
 86         Uri uri = Uri
 87                 .parse("content://com.example.contentprovidertest01.PersonContentProvider/person");
 88         Cursor cursor = contentResolver.query(uri, null, null, null, null);
 89         while (cursor.moveToNext()) {
 90             Log.i("MyTest",
 91                     "--->>"
 92                             + cursor.getString(cursor.getColumnIndex("name")));
 93         }
 94     }
 95 
 96     //測试方法：依据条件查询全部记录。
 97     public void querys() {
 98         ContentResolver contentResolver = getContext().getContentResolver();
 99         Uri uri = Uri
100                 .parse("content://com.example.contentprovidertest01.PersonContentProvider/person");
101         String where = "address=?";
102         String[] where_args = { "深圳" };
103         Cursor cursor = contentResolver.query(uri, null, where, where_args,
104                 null);
105         while (cursor.moveToNext()) {
106             Log.i("main",
107                     "-------------->"
108                             + cursor.getString(cursor.getColumnIndex("name")));
109         }
110     }
111 
112 }