Android——contentProvider(二)通过ContentResolver访问
public class MyTest extends AndroidTestCase { public MyTest() { // TODO Auto-generated constructor stub } public void insert() { // 访问内容提供者的步骤: // 1、需要一个内容解析者 ContentResolver contentResolver = getContext().getContentResolver(); // 使用content://+授权路径 Uri url = Uri .parse("content://com.example.android_contentprovider2.StudentProvider/student"); ContentValues values = new ContentValues(); values.put("name", "王五"); values.put("address", "广西"); contentResolver.insert(url, values); } public void delete() { ContentResolver contentResolver = getContext().getContentResolver(); // 删除单行记录,如果要删除多行记录:content://com.example.android_contentprovider2.StudentProvider/student Uri uri = Uri .parse("content://com.example.android_contentprovider2.StudentProvider/student/1"); contentResolver.delete(uri, null, null); } public void update() { ContentResolver contentResolver = getContext().getContentResolver(); Uri uri = Uri .parse("content://com.example.android_contentprovider2.StudentProvider/student/2"); ContentValues values = new ContentValues(); values.put("name", "李斯"); values.put("address", "上海"); contentResolver.update(uri, values, null, null); } public void query() { ContentResolver contentResolver = getContext().getContentResolver(); // 查询单条记录:content://com.example.android_contentprovider2.StudentProvider/student/2 // 查询多条记录:content://com.example.android_contentprovider2.StudentProvider/student Uri uri = Uri .parse("content://com.example.android_contentprovider2.StudentProvider/student"); // select * from student where id = 2; Cursor cursor = contentResolver.query(uri, null, null, null, null); while (cursor.moveToNext()) { System.out.println("---->>" + cursor.getString(cursor.getColumnIndex("name"))); } } }
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