Content Provider(一) basics(一)

package com.example.drawernavigation.fragment;

import com.example.drawernavigation.MainActivity;
import com.example.drawernavigation.R;

import android.app.Activity;
import android.content.ContentValues;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.UserDictionary;
import android.support.v4.app.Fragment;
import android.support.v4.widget.SimpleCursorAdapter;
import android.text.TextUtils;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;


public class BFragmentDrawer extends Fragment {

	MainActivity.MyOnTouchListener myOnTouchListener;
	private static final String TAG = "BFragmentDrawer";

	private Button content_provider_bt, content_provider_insertbt;
	private EditText content_provider_edt;

	ListView mWordList;

	String mSearchString;
	SimpleCursorAdapter mCursorAdapter;
	Cursor mCursor;

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {

		View view = inflater.inflate(R.layout.fragment_b, container, false);

		content_provider_edt = (EditText) view
				.findViewById(R.id.content_provider_edt);
		content_provider_bt = (Button) view
				.findViewById(R.id.content_provider_bt);

		content_provider_bt.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				querySearch();
			}
		});

		content_provider_insertbt = (Butto





n) view
				.findViewById(R.id.content_provider_insertbt);
		content_provider_insertbt.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				insertSearch();
			}
		});

		mWordList = (ListView) view.findViewById(R.id.mWordList);

		return view;
	}

	public void insertSearch() {
		// Defines a new Uri object that receives the result of the insertion
		Uri mNewUri;
		// Defines an object to contain the new values to insert
		ContentValues mNewValues = new ContentValues();

		/*
		 * Sets the values of each column and inserts the word. The arguments to
		 * the "put" method are "column name" and "value"
		 */
		mNewValues.put(UserDictionary.Words.APP_ID, "example.user2");
		mNewValues.put(UserDictionary.Words.LOCALE, "en_US");
		mNewValues.put(UserDictionary.Words.WORD, "insert2");
		mNewValues.put(UserDictionary.Words.FREQUENCY, "100");

		mNewUri = getActivity().getContentResolver().insert(
				UserDictionary.Words.CONTENT_URI, // the user dictionary content
													// URI
				mNewValues // the values to insert
				);
	}

	public void querySearch() {

		// a "projection" 定义了要返回的行的columns
		String[] mProjection = { UserDictionary.Words._ID,
				UserDictionary.Words.WORD, UserDictionary.Words.LOCALE };

		// 定义一个string 来包含 要选择的分句
		String mSelectionClause = null;
		// 初始化一个array 来包含 要选择的参数
		String[] mSelectionArgs = { "" };

		// 从UI线程获得一个单词
		mSearchString = content_provider_edt.getText().toString();

		// 插入代码，检查 输入的有效性和安全性

		/**
		 * 如果是空，返回所有值
		 */
		if (TextUtils.isEmpty(mSearchString)) {
			Log.e(TAG, "