ソフトウェアエンジニアの技術ブログ：Software engineer tech blog

file -> Profile or debug APK…　で開く

どうりで、file -> New　で何度やってもダメだった訳だ。

debugしようとすると、”please select Android SDK”のエラー

SDK、moduleをセットして、外部androidに接続する。

OK、APKの課題はクリアーした。意外と簡単だった。
androidは、次はjsonだが、その前に、git、grep、dream weaverをやらないといけない。

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class FetchValueClass {

	static final String URL = "jdbc:mysql://localhost/cm";
	static final String USERNAME = "user";
	static final String PASSWORD = "pass";

	public static void main(String[] args){

		String sql = "SELECT * FROM music;";

		try ( Connection connection = DriverManager.getConnection(URL, USERNAME, PASSWORD);
			PreparedStatement statement = connection.prepareStatement(sql); ){

			ResultSet result = statement.executeQuery();

			result.next();
			System.out.println(result.getString(1));
			System.out.println(result.getString(2));
			System.out.println(result.getString(3));
			System.out.println(result.getString("id"));
			System.out.println(result.getString("name"));
			System.out.println(result.getString("title"));

			System.out.println("");

			result.next();
			System.out.println(result.getString(1));
			System.out.println(result.getString(2));
			System.out.println(result.getString(3));
			System.out.println(result.getString("id"));
			System.out.println(result.getString("name"));
			System.out.println(result.getString("title"));

		} catch(SQLException e){
			e.printStackTrace();
		}
	}
}

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Toast;

public class sampleActivity extend Activity {
	@Override
	public void onCreate(Bundle savedInstanceState){
		super.onCreate(savedInstanceSate);
		setContentView(R.layout.main);

		try {
			Connection con = MySqlConnect.getConnection();
			Statement stmt = (Statement) con.createStatement();

			String mySql = "select date from table;";
			ResultSet rs = stmt.executeQuery(mySql);

			while(rs.next()){
				Toast.makeText(getApplicationContext(), rs.getString("date"), Toast.LENGTH_LONG).show();

			}

			rs.close();
			stmt.close();
			con.close();
		} catch(Exception e){
			
		}
	}
}

import java.sql.*;

class MySqlConnect{
	static Connection getConnection() throws Exception {

		Class.forName("com.mysql.jdbc.Driver");

		String url = "jdbc:mysql://xxx.xxx.xxx/db_name";
		String user = "user_name";
		String pass = "password";

		Connection con = DriverManager.getConnection(url, user,pass);
		return con;
	}
}

in Android

public static InputStream is = null;
public static JSONArray json_array = null;
public static DefaultHeepClient httpClient;

public static void main(String getSERVER, String getURL, String getDB, String getID){
	SchemeRegistry schReg = new SchemeRegistry();
	schReg.register(new Scheme(HttpHost.DEFAULT_SCHEME_NAME, PlainSocketFactory.getSocketFactory(),80));

	HttpParams httpParams;
	httpParams = new BasicHttpParams();
	HttpProtocolParams.setVersion(httpParams, HttpVersion.HTTP_1_1);
	HttpProtocolParams.setContentCharset(httpParams, HTTP.UTF_8);

	httpClient = new DefaultHttpClient(new ThreadSafeClientConnManager(httpParams, schReg),httpParams);

	HttpResponse response = null;
	try {
		Uri.Builder uriBuilder = new Uri.Builder();
		uriBuilder.path(getURL);
		uriBuilder.appendQueryParameter("SERVER",getSERVER);
		uriBuilder.appendQueryParameter("ID",getID);
		uriBuilder.appendQueryParameter("db_name", getDB);
		response = httpClient.execute(new HttpHost(getSERVER),new HttpGet(uriBuilder.build().toString()));
	} catch(Exception e){
		Log.e("Error","接続エラー");
		return;
	}

	if(response.getStatusLine().getStatusCode() != HttpStatus.SC_OK){
		Log.e("Error",response.getStatusLine().getStatusCode());
		return;
	}

	StringBuilder json = new StringBuilder();
	try {
		HttpEntity entity = response.getEntity();
		InputStream input = entity.getContent();
		InputStreamReader reader = new InputStreamReader(input);
		BufferedReader bufReader = new BufferedReader(reader);
		String line;
		while((line = bufReader.readLine()) != null){
			json.append(line);
		}
	} catch(IOException e){
		Log.e("Error", "バッファ読み込み失敗");
		return;
	}

	try {
		JSONObject json_data = new JSONObject(json.toString());
		json_array = json_data.getJSONArray("response");
	} catch(JSONException e){
		Log.e("Error","JSONデータが不正");
		return;
	}
	return;
}