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main/java/com/hty/browser/DBHelper.java

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+package com.hty.browser;
+
+import java.io.File;
+
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+
+public class DBHelper extends SQLiteOpenHelper {
+
+	public static final String DATABASE_NAME = MainActivity.dir + File.separator + "webfav.db";
+	private final static int VERSION = 1;
+	String TableName = "webfav";
+	private SQLiteDatabase db;
+	private static DBHelper mInstance = null;
+
+	public DBHelper(Context context) {
+		super(context, DATABASE_NAME, null, VERSION);
+	}
+
+	public static synchronized DBHelper getInstance(Context context) {
+		if (mInstance == null) {
+			mInstance = new DBHelper(context);
+		}
+		return mInstance;
+	}
+
+	@Override
+	public void onCreate(SQLiteDatabase db) {
+		this.db = db;
+		db.execSQL("CREATE TABLE webfav (_id INTEGER PRIMARY KEY ,website TEXT,title TEXT)");
+	}
+
+	@Override
+	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+		// db.execSQL("DROP TABLE IF EXISTS battery");
+		// onCreate(db);
+		switch (newVersion) {
+		case 6:
+			db.execSQL("alter table battery rename to battery_temp");
+			db.execSQL("CREATE TABLE battery (_id INTEGER PRIMARY KEY ,time TEXT,level INTEGER, voltage INTEGER, current INTEGER , temperature INTEGER, cpu INTEGER)");
+			db.execSQL("insert into battery select *,'' from battery_temp");
+			db.execSQL("drop table battery_temp");
+			break;
+		}
+	}
+
+	public void insert(ContentValues values) {
+		db = getWritableDatabase();
+		db.insert(TableName, null, values);
+		db.close();
+	}
+
+	public Cursor query(String url) {
+		db = getWritableDatabase();
+		Cursor c = null;
+		if (url.equalsIgnoreCase("")) {
+			c = db.query(TableName, null, null, null, null, null, "_id desc");
+		} else {
+			c = db.query(TableName, null, "website=?", new String[] { url }, null, null, "_id desc");
+		}
+		return c;
+	}
+
+	public void del(int id) {
+		if (db == null)
+			db = getWritableDatabase();
+		db.delete(TableName, "_id=?", new String[] { String.valueOf(id) });
+		// Log.e("id", id + "");
+		// db.ExecuteNonQuery(CommandType.Text, "VACUUM");
+	}
+
+	@Override
+	public void close() {
+		if (db != null)
+			db.close();
+	}
+}