Project——ContetnProvider:访问定以好的内容提供者

来源：互联网发布：mac上装linux虚拟机编辑：程序博客网时间：2024/06/05 22:32

1、

package cn.itcast.other;

import android.content.ContentResolver;
import android.content.ContentValues;
import android.database.Cursor;
import android.net.Uri;
import android.test.AndroidTestCase;
import android.util.Log;

public class AccessContentProvider extends AndroidTestCase {
private static final String TAG = "AccessContentProvider";

public void testSave() throws Throwable{
  ContentResolver contentResolver = this.getContext().getContentResolver();
  Uri insertUri = Uri.parse("content://cn.itcast.provides.personprovider/person");
  ContentValues values = new ContentValues();
  values.put("name", "laozhang");
  values.put("phone", "1350000009");
  values.put("amount", "30000000000");
  Uri uri = contentResolver.insert(insertUri, values);
  Log.i(TAG, uri.toString());
}

public void testUpdate() throws Throwable{
  ContentResolver contentResolver = this.getContext().getContentResolver();
  Uri updateUri = Uri.parse("content://cn.itcast.provides.personprovider/person/5");
  ContentValues values = new ContentValues();
  values.put("amount", "300");
  contentResolver.update(updateUri, values, null, null);
}

public void testFind() throws Throwable{
  ContentResolver contentResolver = this.getContext().getContentResolver();
  Uri uri = Uri.parse("content://cn.itcast.provides.personprovider/person");
  Cursor cursor = contentResolver.query(uri, null, null, null, "personid asc");
  while(cursor.moveToNext()){
   int personid = cursor.getInt(cursor.getColumnIndex("personid"));
   String name = cursor.getString(cursor.getColumnIndex("name"));
   String phone = cursor.getString(cursor.getColumnIndex("phone"));
   int amount = cursor.getInt(cursor.getColumnIndex("amount"));
   Log.i(TAG, "personid="+ personid + ",name="+ name+ ",phone="+ phone+ ",amount="+ amount);
  }
  cursor.close();
}

public void testDelete() throws Throwable{
  ContentResolver contentResolver = this.getContext().getContentResolver();
  Uri uri = Uri.parse("content://cn.itcast.provides.personprovider/person/5");
  contentResolver.delete(uri, null, null);
}
}

2、

package cn.itcast.other;

import android.app.Activity;
import android.content.ContentResolver;
import android.database.ContentObserver;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;

public class MainActivity extends Activity {
    private static final String TAG = "MainActivity";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Uri uri = Uri.parse("content://cn.itcast.provides.personprovider/person");
        getContentResolver().registerContentObserver(uri, true, new PersonContentObserver(new Handler()));
    }

    private final class PersonContentObserver extends ContentObserver{

  public PersonContentObserver(Handler handler) {
   super(handler);
  }

  @Override
  public void onChange(boolean selfChange) {
   ContentResolver contentResolver = getContentResolver();
   Uri uri = Uri.parse("content://cn.itcast.provides.personprovider/person");
   Cursor cursor = contentResolver.query(uri, null, null, null, "personid asc");
   while(cursor.moveToNext()){
    int personid = cursor.getInt(cursor.getColumnIndex("personid"));
    String name = cursor.getString(cursor.getColumnIndex("name"));
    String phone = cursor.getString(cursor.getColumnIndex("phone"));
    int amount = cursor.getInt(cursor.getColumnIndex("amount"));
    Log.i(TAG, "personid="+ personid + ",name="+ name+ ",phone="+ phone+ ",amount="+ amount);
   }
   cursor.close();
  }

    }
}