hzuapps#5 hzuapps#178 第五次作业

AndroidLabs/app/src/main/java/edu/hzuapps/androidlabs/homeworks/net1414080903109/Net1414080903109OpenHelper.java

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+package edu.hzuapps.androidlabs.net1414080903109;
+
+import android.content.Context;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+
+/**
+ * Created by Administrator on 2017/5/31.
+ */
+
+/*SQLHelper*/
+public class Net1414080903109OpenHelper extends SQLiteOpenHelper {
+
+
+    public Net1414080903109OpenHelper(Context context) {
+        super(context,"day", null, 1);
+    }
+
+    @Override
+    public void onCreate(SQLiteDatabase db) {
+
+        db.execSQL("create table day(name varchar(20),occur varchar(20));");
+
+    }
+
+    @Override
+    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+
+    }
+}

AndroidLabs/app/src/main/java/edu/hzuapps/androidlabs/homeworks/net1414080903109/Net1414080903109Presenter.java

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+package edu.hzuapps.androidlabs.net1414080903109;
+
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Created by Administrator on 2017/5/31.
+ */
+
+public class Net1414080903109Presenter {
+
+    private SQLiteOpenHelper helper;
+    private static Net1414080903109Presenter presenter;
+
+    private Net1414080903109Presenter(Context context){
+        if (helper==null){
+            helper=new Net1414080903109OpenHelper(context);
+        }
+    }
+
+    public static Net1414080903109Presenter getInstance(Context context){
+        if (presenter==null){
+            presenter=new Net1414080903109Presenter(context);
+        }
+        return presenter;
+    }
+
+    /*添加节日*/
+    public void add(Net1414080903109DayBean day){
+        SQLiteDatabase db=helper.getWritableDatabase();
+        ContentValues values=new ContentValues();
+        values.put("name",day.getName());
+        values.put("occur",day.getOccur());
+        db.insert("day",null,values);
+        db.close();
+    }
+   /*查找所有节日*/
+    public List<Net1414080903109DayBean> list(){
+        List<Net1414080903109DayBean> list=new ArrayList<>();
+        SQLiteDatabase db=helper.getReadableDatabase();
+        Cursor cursor=db.query("day",null,null,null,null,null,null);
+        while (cursor.moveToNext()){
+            Net1414080903109DayBean day=new Net1414080903109DayBean();
+            day.setName(cursor.getColumnName(cursor.getColumnIndex("name")));
+            day.setOccur(cursor.getColumnName(cursor.getColumnIndex("occur")));
+            list.add(day);
+        }
+        cursor.close();
+        db.close();
+        return list;
+    }
+
+    /*删除节日*/
+    public void delete(String name){
+        SQLiteDatabase db=helper.getWritableDatabase();
+        db.delete("day","name=?",new String[]{name});
+        db.close();
+    }
+
+
+}