Android SQL
package com.example.e560.m1126a.ToolsClass;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
import org.json.JSONArray;
import org.json.JSONObject;
/**
* Created by E560 on 2016/11/26.
*/
public class FlickrSQL {
/**
*
*/
private Context context;
private final String TAG = "FlickrSQL";
private final String JSON_PATH = "http://cdefgab.web.fc2.com/idolsname.json";
private final String DB_NAME = "IdolAPP.db";
private final int DB_VERSION = 1;
private mSQL mSQL_db;
/**
* @param context
*/
public FlickrSQL(Context context) {
this.context = context;
mSQL_db = new mSQL(context, DB_NAME, null, DB_VERSION);
}
/**
* 檢查Name是否存在。count = 1 存在，0 不存在。
*
* @param name
* @return
* @throws Exception
*/
public int check_name(String name) throws Exception {
int count = 0;
SQLiteDatabase db = mSQL_db.getWritableDatabase();
String sql_cmd = "select name from toplist where name = ?";
Cursor cursor = db.rawQuery(sql_cmd, new String[]{name});
count = cursor.getCount();
cursor.close();
db.close();
return count;
}
/**
* 返回Name個數。
*
* @return
*/
public int db_count() {
int count = 0;
SQLiteDatabase db = mSQL_db.getReadableDatabase();
String sql_cmd = "select count(*) from toplist";
Cursor cursor = db.rawQuery(sql_cmd, null);
while (cursor.moveToNext()) {
count = Integer.parseInt(cursor.getString(cursor.getColumnIndex("count(*)")));
}
cursor.close();
Log.i(TAG, "db_idols_count: " + count);
db.close();
return count;
}
/**
* 返回所有條目。
*
* @return
*/
public Cursor Selectall() {
Cursor cursor = null;
SQLiteDatabase db = mSQL_db.getReadableDatabase();
String sql_cmd = "select * from toplist WHERE active NOT IN(?) ORDER BY up_date DESC ";
cursor = db.rawQuery(sql_cmd, new String[]{"false"});
return cursor;
}
/**
* 從JSON_PATH 更新客戶端數據庫。
* String JSON_PATH = "http://cdefgab.web.fc2.com/idolsname.json";
*
* @throws Exception
*/
public void sysdb() throws Exception {
int insertcount = 0;
SQLiteDatabase db = mSQL_db.getWritableDatabase();
String json = FlickrHttp.GetResultstring(JSON_PATH);
JSONObject jsonObject = new JSONObject(json);
JSONArray jsonArray = jsonObject.getJSONArray("idolnames");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject1 = jsonArray.getJSONObject(i);
if (check_name(jsonObject1.getString("name")) == 1) {
update_active(jsonObject1.getString("name"), jsonObject1.getString("active"));
} else {
insertcount++;
insert(jsonObject1.getString("name"), jsonObject1.getString("img"));
update_active(jsonObject1.getString("name"), jsonObject1.getString("active"));
}
}
Log.i(TAG, "sysdb: new Insert " + insertcount);
db.close();
}
public void insert(String name, String img_url) {
SQLiteDatabase db = mSQL_db.getWritableDatabase();
String sql_cmd = "insert into toplist(name,img_url) values (? ,?)";
db.execSQL(sql_cmd, new String[]{name, img_url});
db.close();
}
public void update_imgurl(String name, String img_url) {
SQLiteDatabase db = mSQL_db.getWritableDatabase();
String sql_cmd = "update toplist set img_url = ? where name = ?";
db.execSQL(sql_cmd, new String[]{name, img_url});
db.close();
}
public void update_active(String name, String active) {
SQLiteDatabase db = mSQL_db.getWritableDatabase();
String sql_cmd = "update toplist set active = ? where name = ?";
db.execSQL(sql_cmd, new String[]{active, name});
db.close();
}
public class mSQL extends SQLiteOpenHelper {
/**
* mSQL_db = new mSQL(context, db_pak_name, null, db_version);
* https://farm8.staticflickr.com/7566/15949681296_b6a869bdfd_q.jpg
* https://farm8.staticflickr.com/7569/15975428145_c85aae84bd_s.jpg
*/
public mSQL(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {
super(context, name, factory, version);
}
@Override
public void onCreate(SQLiteDatabase db) {
String topidoltable = "create table toplist (rowid INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT UNIQUE NOT NULL,up_date TEXT default current_timestamp,img_url TEXT NOT NULL, accc INTEGER DEFAULT 0, Active TEXT DEFAULT 'ture')";
String setimgurl = "update toplist set img_url = ?";
db.execSQL(topidoltable);
db.execSQL(setimgurl, new String[]{"https://farm8.staticflickr.com/7569/15975428145_c85aae84bd_s.jpg"});
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}
}
/**
* Created by E560 on 2016/11/26.
*/
public class test_FlickrSQL extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.test);
new Th().start();
}
class Th extends Thread {
@Override
public void run() {
try {
FlickrSQL flickrSQL = new FlickrSQL(getApplicationContext());
// flickrSQL.sysdb();
// flickrSQL.db_count();
Cursor cursor = flickrSQL.Selectall();
while (cursor.moveToNext()) {
String rowid = cursor.getString(cursor.getColumnIndex("rowid"));
String name = cursor.getString(cursor.getColumnIndex("name"));
String up_date = cursor.getString(cursor.getColumnIndex("up_date"));
String img_url = cursor.getString(cursor.getColumnIndex("img_url"));
String accc = cursor.getString(cursor.getColumnIndex("accc"));
String Active = cursor.getString(cursor.getColumnIndex("Active"));
System.out.println(rowid);
System.out.println(name);
System.out.println(up_date);
System.out.println(img_url);
System.out.println(accc);
System.out.println(Active);
}
// cursor.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
