实现恩格尔系数视图

README.md

@@ -99,7 +99,7 @@
 
 1. 尝试写一下大作业的报告，遇到问题有需要补充的再继续开发
 2. 添加在固定时间指定备注的功能               √
-3. 添加恩格尔系数视图
+3. 添加恩格尔系数视图                       √
 4. 添加定时记账功能
 5. 备份功能
 6. 在记录界面添加点击弹出修改框可以修改备注的功能          √

app/src/main/java/com/eb/easy_bookkeeping/SettingActivity.java

@@ -26,6 +26,9 @@ public void onClick(View view) {
             case R.id.setting_tv_clear:
                 showDeleteDialog();
                 break;
+            case R.id.setting_tv_engel:
+                showEngelCoefficient();
+                break;
         }
     }
 
@@ -43,4 +46,25 @@ public void onClick(DialogInterface dialog, int which) {
                 });
         builder.create().show();
     }
+
+    private void showEngelCoefficient() {
+        float engelCoefficient = DBManager.getEngelCoefficient();
+        String hint;
+        if (engelCoefficient < 0.3) {
+            hint = "最富裕！钱花不完可以多多打赏哦~";
+        } else if (engelCoefficient < 0.4) {
+            hint = "富裕~钱挣够了可以好好享受生活呀";
+        } else if (engelCoefficient < 0.5) {
+            hint = "小康，生活还是很滋润滴。";
+        } else if (engelCoefficient < 0.59) {
+            hint = "温饱，争取为全面建成小康社会贡献一份力量！";
+        } else {
+            hint = "贫困，脱贫攻坚战漏网之鱼嘛呜呜呜";
+        }
+        AlertDialog.Builder builder = new AlertDialog.Builder(this);
+        builder.setTitle("恩格尔系数为：")
+                .setMessage(String.format("%.3f", engelCoefficient) + "\n" + hint)
+                .setNegativeButton("确定", null);
+        builder.create().show();
+    }
 }

app/src/main/java/com/eb/easy_bookkeeping/db/DBManager.java

@@ -81,6 +81,20 @@ public static void updateItemBeizhuFromAccounttbById(int id, String beizhu){
         }
         return list;
     }
+    /**
+     * 获取恩格尔系数值
+     * */
+    public static float getEngelCoefficient(){
+        String sql = "select * from foodcostsumview";
+        Cursor cursor = db.rawQuery(sql, null);
+        cursor.moveToNext();
+        float foodcost = cursor.getFloat(cursor.getColumnIndex("foodcost"));
+        sql = "select sum(money) as sum from accounttb where kind = 0";
+        cursor = db.rawQuery(sql, null);
+        cursor.moveToNext();
+        float sum = cursor.getFloat(cursor.getColumnIndex("sum"));
+        return foodcost/sum;
+    }
     /*
      * 获取记账表当中某一月的所有支出或者收入情况
      * */

app/src/main/java/com/eb/easy_bookkeeping/db/DBOpenHelper.java

@@ -24,6 +24,12 @@ public void onCreate(SQLiteDatabase db) {
         sql = "create table accounttb(id integer primary key autoincrement,typename varchar(10),ImageId integer,beizhu varchar(80),money float," +
                 "time varchar(60),year integer,month integer,day integer,kind integer)";
         db.execSQL(sql);
+        createFoodCostSumView(db);
+    }
+
+    private void createFoodCostSumView(SQLiteDatabase db) {
+        String sql = "create view foodcostsumview as select sum(money) as foodcost from accounttb where kind = 0 and typename in (select typename from typetb where id = 1 )";
+        db.execSQL(sql);
     }
 
     private void insertType(SQLiteDatabase db) {

app/src/main/res/layout/activity_setting.xml

@@ -32,6 +32,16 @@
         android:textStyle="bold"
         android:padding="15dp"
         android:background="@color/white"/>
+    <TextView
+        android:id="@+id/setting_tv_engel"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/engel_coefficient"
+        android:onClick="onClick"
+        android:textSize="16sp"
+        android:textStyle="bold"
+        android:padding="15dp"
+        android:background="@color/white"/>
     <View
         android:layout_width="match_parent"
         android:layout_height="1dp"

app/src/main/res/values/strings.xml

@@ -39,6 +39,7 @@
 
     <string name="history_info">本月账单记录</string>
     <string name="clear_all">清空所有记录</string>
+    <string name="engel_coefficient">恩格尔系数视图</string>
 
     <!-- TODO: Remove or change this placeholder text -->
     <string name="not_data">暂无数据</string>