hzuapps#90 hzuapps#91 hzuapps#95 hzuapps#66 实验4-9（完成）

实验完成

app/src/main/java/edu/hzuapps/androidworks/homeworks/com1314080901210/DBHelper.java

@@ -0,0 +1,36 @@
+package com.example.com1314080901210.Kechengbiao;
+
+import android.content.Context;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+import android.util.Log;
+
+public class DBHelper extends SQLiteOpenHelper{
+	private static final String DATABASE_NAME="lesson.db";
+	private static final int DATABASE_VERSION=1;
+
+	public DBHelper(Context ctx){
+		super(ctx,DATABASE_NAME,null,DATABASE_VERSION);
+	}
+
+	@Override
+	public void onCreate(SQLiteDatabase arg0) {
+		// TODO Auto-generated method stub
+		arg0.execSQL("create table event (day_no integer not null,class_no integer not null,class_name text not null," +
+				"class_address text not null,class_teacher text not null,primary key (day_no,class_no,class_name))");
+		Log.i("database", "create event");
+	}
+
+	@Override
+	public void onUpgrade(SQLiteDatabase arg0, int arg1, int arg2) {
+		// TODO Auto-generated method stub
+
+	}
+	public Cursor query(String sql, String[] args)
+	{
+		SQLiteDatabase db = this.getReadableDatabase();
+		Cursor cursor = db.rawQuery(sql, args);		
+		return cursor;
+	}
+}