hzuapps#91 hzuapps#92 hzuapps#93 hzuapps#94 hzuapps#95 hzuapps#546 实验5-9

app/src/main/java/edu/hzuapps/androidworks/homeworks/net1314080903120/Net1314080903120dataBase.java

@@ -0,0 +1,164 @@
+package edu.hzuapps.androidworks.homeworks.net1314080903120;
+
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+import android.util.Log;
+
+public class Net1314080903120dataBase extends SQLiteOpenHelper{
+	/////////////////////////////////////////////////////////////////////////定义数据库字段名
+	private static String DATABASE_NAME="scheme.db";
+	private static String TABLE_NAME="project";
+	private static String ID="project_id";
+	private static String TOPIC="topic";
+	private static String DETAIL="detail";
+	private static String DATE="date";
+	private static String TIME="time";
+	private static String PRIORITY="priority";
+	private static String PERIOD="period";
+	private static String STATE="state";
+
+
+	/////////////////////////////////////////////////////////////////////////构造方法
+	public Net1314080903120dataBase(Context context) {
+		super(context, DATABASE_NAME, null,1);
+		// TODO Auto-generated constructor stub
+	}
+	/////////////////////////////////////////////////////////////////////////创建数据表
+	@Override
+	public void onCreate(SQLiteDatabase db) {
+		// TODO Auto-generated method stub
+		String sql = "CREATE TABLE " + TABLE_NAME + " (" + ID
+				+ " INTEGER primary key autoincrement, "+ PERIOD +" text," + TOPIC + " text, "+ DATE +" text,"
+				+ TIME +" text,"+ DETAIL +" text,"+ PRIORITY +" text,"+ STATE +" text);";
+
+		db.execSQL(sql);
+		db.execSQL("INSERT INTO " + TABLE_NAME + " values(1 ,'短期计划','android作业','2016年4月29日','14:00','课程设计','紧急','未完成');");
+		db.execSQL("INSERT INTO " + TABLE_NAME + " values(4 ,'中期计划','六级听力','2016年5月18日','14:30','submit the documents','重要','未完成');");
+
+		Log.d("check",TABLE_NAME);
+
+
+
+	}
+
+	/////////////////////////////////////////////////////////////////////////插入数据的方法
+
+	public long insert(String period,String topic,String date,String time,
+					   String priority,String detail,String state)
+	{
+
+
+		SQLiteDatabase db=this.getWritableDatabase();
+		ContentValues cv=new ContentValues();
+		cv.put(PERIOD, period);
+		cv.put(TOPIC, topic);
+		cv.put(DATE, date);
+		cv.put(TIME, time);
+		cv.put(DETAIL, detail);
+		cv.put(PRIORITY, priority);
+		cv.put(STATE, state);
+
+
+
+		long row= db.insert(TABLE_NAME, null, cv);
+		return row;
+	}
+
+
+	//	public long insert(String topic,String date)
+//	{
+//		SQLiteDatabase db=this.getWritableDatabase();
+//		ContentValues cv=new ContentValues();
+//		cv.put(TOPIC, topic);
+//		cv.put(DATE, date);
+//		long row= db.insert(TABLE_NAME, null, cv);
+//		return row;
+//	}
+	/////////////////////////////////////////////////////////////////////////删除
+	public void delete(String id)
+	{
+		SQLiteDatabase db = this.getWritableDatabase();
+		String where = ID + " = ?";
+		String[] whereValue={id};
+		db.delete(TABLE_NAME, where, whereValue);
+	}
+	////////////////////////////////////////////////////////////////////////修改数据方法
+	public void update(String id,String period,String topic,String date,String time,
+					   String priority,String detail)
+
+	{
+
+		SQLiteDatabase db = this.getWritableDatabase();
+
+		String where = ID + " = ?";
+
+		String[] whereValue = {id};
+
+		ContentValues cv = new ContentValues();
+
+		cv.put(PERIOD, period);
+		cv.put(TOPIC, topic);
+		cv.put(DATE, date);
+		cv.put(TIME, time);
+		cv.put(DETAIL, detail);
+		cv.put(PRIORITY, priority);
+		//cv.put(STATE, state);
+
+		db.update(TABLE_NAME, cv, where, whereValue);
+
+	}
+	/////////////////////////////////////////////////////////////////////////插入数据中的状态的方法
+	public void modifyState(String id,String state)
+	{
+		SQLiteDatabase db = this.getWritableDatabase();
+
+		String where = ID + " = ?";
+
+		String[] whereValue = {id};
+
+		ContentValues cv = new ContentValues();
+
+
+
+		cv.put(STATE, state);
+
+
+		db.update(TABLE_NAME, cv, where, whereValue);
+	}
+
+	/////////////////////////////////////////////////////////////////////////当表存在时则删除再创建
+
+	@Override
+	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+		// TODO Auto-generated method stub
+		//String initsql="INSERT INTO " + TABLE_NAME + " values(1 ,'zhangsan','2013/5/22');";
+		//db.execSQL(initsql);
+		Log.d("executing","insert initsql");
+		String sql="DROP TABLE IF EXISTS " + TABLE_NAME;
+		db.execSQL(sql);
+		onCreate(db);
+
+	}
+	/////////////////////////////////////////////////////////////////////////选择所有数据
+	public Cursor select()
+	{
+		SQLiteDatabase db=this.getWritableDatabase();
+		Cursor cursor=db.query(TABLE_NAME,  null, null, null, null, null, null);
+		return cursor;
+	}
+	/////////////////////////////////////////////////////////////////////////插入特定id对应的数据
+	public Cursor select(String id)
+	{
+		SQLiteDatabase db=this.getWritableDatabase();
+		String Selection= ID + " = ?";
+		String[] selectionArgs={id};
+		Cursor cursor=db.query(TABLE_NAME, null, Selection, selectionArgs, null, null, null);
+		return cursor;
+	}
+
+
+
+}