使用ContentResolver添加数据、查询数据

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;

import android.os.Bundle;
import android.provider.UserDictionary.Words;
import android.app.Activity;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Intent;
import android.database.Cursor;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class DictResolver extends Activity {
  ContentResolver contentResolver;
  Button insert;
  Button search;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_dict_resolver);
    //获取系统的ContentResolver对象
    contentResolver = getContentResolver();
    insert = (Button) findViewById(R.id.insert);
    search = (Button) findViewById(R.id.search);
    //为insert按钮的单击事件绑定事件监听器
    insert.setOnClickListener(new OnClickListener() {

      @Override
      public void onClick(View v) {
        // 获取用户输入
        String word = ((EditText)findViewById(R.id.word)).getText().toString();
        String detail = ((EditText)findViewById(R.id.detail)).getText().toString();
        //插入生词记录
        ContentValues values = new ContentValues();
        values.put(mediaprovidertest.Words.Word.WORD, word);
        values.put(mediaprovidertest.Words.Word.DETAIL, detail);
        contentResolver.insert(mediaprovidertest.Words.Word.DICT_CONTENT_URI, values);
        //显示提示信息
        Toast.makeText(DictResolver.this, "添加单词成功!", 8000).show();
      }
    });
    //为search按钮的单击事件绑定事件监听器
    search.setOnClickListener(new OnClickListener() {

      @Override
      public void onClick(View v) {
        // 获取用户输入
        String key = ((EditText)findViewById(R.id.key)).getText().toString();
        //执行查询
        Cursor cursor = contentResolver.query(
            mediaprovidertest.Words.Word.DICT_CONTENT_URI,
            null, "word like ? or detail like ?",
            new String[]{"%"+key+"%","%"+key+"%"}, null);
        //创建一个Bundle
        Bundle data = new Bundle();
        data.putSerializable("data", converCursorToList(cursor));
        //创建一个Intent
        Intent intent = new Intent(DictResolver.this, ResultActivity.class);
        intent.putExtras(data);
        //启动Activity
        startActivity(intent);
      }
    });
  }
  private ArrayList> converCursorToList(Cursor cursor){
  ArrayList> result = new ArrayList>();
  //遍历Cursor结果集
  while(cursor.moveToNext()){
    //将结果集中的数据存入ArrayList中
    Map map = new HashMap();
    //取出查询记录中第2列、第3列的值
    map.put(mediaprovidertest.Words.Word.WORD, cursor.getString(1));
    map.put(mediaprovidertest.Words.Word.DETAIL, cursor.getString(2));
    result.add(map);
  }
  return result;
  }

}

转载于:https://www.cnblogs.com/jiww/p/5596298.html

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