#7 #534 第七次实验

students/soft1714080902223/app/src/main/AndroidManifest.xml

@@ -6,6 +6,7 @@
     <dist:module dist:instant="true" />
 
     <application
+        android:name=".MyApplication"
         android:allowBackup="true"
         android:label="@string/app_name"
         android:supportsRtl="true"

students/soft1714080902223/app/src/main/java/edu/hzuapps/androidlabs/dao/TaskDao.java

@@ -5,6 +5,7 @@
 import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
 
+import java.net.PortUnreachableException;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Date;
@@ -17,6 +18,8 @@
 import edu.hzuapps.androidlabs.model.Task;
 
 public class TaskDao {
+    public final static String LAST_TIME_PATTERN = "yyyy-MM-dd HH:mm";
+    public final static String CREATE_TIME_PATTERN = "yyyy-MM-dd HH:mm:ss";
     private String tableName;
     private TaskDatabaseHelper taskDatabaseHelper;
 
@@ -32,33 +35,48 @@ public TaskDao(Context context){
      * @param content : 内容
      * @return 返回成功插入的数据数
      */
-    public long save(String title, String content){
+    public long save(String title, String content, String lastTime){
         SQLiteDatabase database = taskDatabaseHelper.getWritableDatabase();
         // 使用Android封装的SQL语法
         ContentValues values = new ContentValues();
         values.put("title", title);
         values.put("content", content);
-        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss",
-                new Locale("zh", "CN"));
-        Date d = new Date();
-        String date = sdf.format(d);
-        values.put("last_time",date);
+        if(lastTime == null) {
+            SimpleDateFormat sdf = new SimpleDateFormat(LAST_TIME_PATTERN,
+                    new Locale("zh", "CN"));
+            Date d = new Date();
+            String date = sdf.format(d);
+            values.put("last_time", date);
+        }
+        else {
+            values.put("last_time", lastTime);
+        }
         long id = database.insert(tableName,null,values);
         database.close();
         return id;
     }
 
-    public void update(String title, String content, long id){
+    public void update(String title, String content, String lastTime, long id){
+        update(title, content, lastTime, -1, id);
+    }
+
+    public void update(String title, String content, String lastTime, int finish, long id){
         SQLiteDatabase database = taskDatabaseHelper.getWritableDatabase();
         ContentValues values = new ContentValues();
-        values.put("title", title);
-        values.put("content", content);
+        if(title != null)
+            values.put("title", title);
+        if(content != null)
+            values.put("content", content);
+        if(lastTime != null)
+            values.put("last_time", lastTime);
+        if(finish != -1){
+            values.put("finish", finish);
+        }
         database.update(tableName, values, "id=?",
                 new String[]{Long.toString(id)});
         database.close();
     }
 
-
     public long delete(long id){
         SQLiteDatabase database = taskDatabaseHelper.getWritableDatabase();
         String idStr = Long.toString(id);
@@ -79,7 +97,8 @@ public Task findById(long id){
             task.setId(cursor.getLong(cursor.getColumnIndex("id")));
             task.setTitle(cursor.getString(cursor.getColumnIndex("title")));
             task.setContent(cursor.getString(cursor.getColumnIndex("content")));
-            task.setDate(cursor.getString(cursor.getColumnIndex("last_time")));
+            task.setLastTime(cursor.getString(cursor.getColumnIndex("last_time")));
+            task.setCreateTime(cursor.getString(cursor.getColumnIndex("create_time")));
             task.setFinish(cursor.getInt(cursor.getColumnIndex("finish")));
         }
         cursor.close();
@@ -102,7 +121,8 @@ public List<Task> findAll(){
             task.setTitle(cursor.getString(cursor.getColumnIndex("title")));
             task.setContent(cursor.getString(cursor.getColumnIndex("content")));
             task.setFinish(cursor.getInt(cursor.getColumnIndex("finish")));
-            task.setDate(cursor.getString(cursor.getColumnIndex("last_time")));
+            task.setLastTime(cursor.getString(cursor.getColumnIndex("last_time")));
+            task.setCreateTime(cursor.getString(cursor.getColumnIndex("create_time")));
             taskList.add(task);
         }
         cursor.close();

students/soft1714080902223/app/src/main/java/edu/hzuapps/androidlabs/listview/HomeListAdapter.java

@@ -1,6 +1,7 @@
 package edu.hzuapps.androidlabs.listview;
 
 import android.content.Context;
+
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -10,30 +11,27 @@
 import java.util.List;
 
 import edu.hzuapps.androidlabs.model.Task;
+import edu.hzuapps.androidlabs.presenter.TaskService;
+import edu.hzuapps.androidlabs.soft1714080902223.HomeActivity;
 import edu.hzuapps.androidlabs.soft1714080902223.R;
 
 public class HomeListAdapter extends BaseAdapter {
-
     private Context mContext;
     private LayoutInflater mLayoutInflater;
+    //考虑到内存占用，不将此层与model分离，而使用其引用
+    //由于引用传递，又由于TaskService是单例，tasks赋值一次后便作为TaskService中list的的观察者
     private List<Task> tasks;
-
-    public HomeListAdapter(Context context, List<Task> tasks){
-        mContext = context;
-        mLayoutInflater = LayoutInflater.from(context);
-        this.tasks = tasks;
-    }
+    private TaskService taskService;
 
     public HomeListAdapter(Context context){
         mContext = context;
         mLayoutInflater = LayoutInflater.from(context);
+        taskService = TaskService.INSTANCE.getTaskService();
+        taskService.setHomeListAdapter(this);
+        tasks = taskService.getAllList();
     }
 
-    public void setTasks(List<Task> tasks){
-        if(tasks == null) {
-            return;
-        }
-        this.tasks = tasks;
+    public void notifyChange(){
         // 通知ListView修改了
         notifyDataSetChanged();
     }
@@ -52,6 +50,7 @@ public int getCount() {
      * @param position 参数为第几个对象
      * @return 返回子项对应的对象
      */
+
     @Override
     public Object getItem(int position) {
         //获取列表中的对象
@@ -61,15 +60,15 @@ public Object getItem(int position) {
     /**
      *
      * @param position
-     * @return 返回子项的是第几个
+     * @return 返回对应位置的item的id
      */
     @Override
     public long getItemId(int position) {
-        return position;
+        return 0;
     }
 
     static class ViewHolder {
-        TextView lvTitle, lvTime, lvContent;
+        TextView lvTitle, lvTime, lvContent, lvStatus;
     }
 
     /**
@@ -80,10 +79,10 @@ static class ViewHolder {
      * @return 返回子项视图
      */
     @Override
-    public View getView(int position, View convertView, ViewGroup parent) {
+    public View getView(final int position, View convertView, ViewGroup parent) {
         Task task = (Task) getItem(position);
         View view;
-        ViewHolder holder;
+        final ViewHolder holder;
         //如果不存在，就去xml中获取，存在就直接用
         if(convertView == null){
             //关联list_item及其参数
@@ -92,16 +91,41 @@ public View getView(int position, View convertView, ViewGroup parent) {
             holder.lvTitle = view.findViewById(R.id.lv_title);
             holder.lvContent = view.findViewById(R.id.lv_content);
             holder.lvTime = view.findViewById(R.id.lv_time);
+            holder.lvStatus = view.findViewById(R.id.lv_status);
             view.setTag(holder);
         }
         else{
             view = convertView;
             holder = (ViewHolder) convertView.getTag();
         }
-        //使用blog中的数据填上
+        //使用task中的数据填上
         holder.lvTitle.setText(task.getTitle());
         holder.lvContent.setText(task.getContent());
-        holder.lvTime.setText(task.getDate());
+        holder.lvTime.setText(taskService.getTextTime(task.getCreateTime()));
+
+        //根据Finish的值的不同更改样式
+        if(task.getFinish() == 0){
+            taskService.setStatus(holder.lvStatus, taskService.UNFINALSTATUS, position);
+        }else{
+            taskService.setStatus(holder.lvStatus, taskService.FINALSTATUS, position);
+        }
+
+        //设置点击更换标签样式
+        holder.lvStatus.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if(holder.lvStatus.getText() == taskService.FINALSTATUS){
+                    taskService.setStatus(holder.lvStatus, taskService.UNFINALSTATUS, position);
+                }else{
+                    taskService.setStatus(holder.lvStatus, taskService.FINALSTATUS, position);
+                }
+
+            }
+        });
         return view;
     }
+
+
+
+
 }

students/soft1714080902223/app/src/main/java/edu/hzuapps/androidlabs/model/Task.java

@@ -5,7 +5,8 @@ public class Task {
     private Long id;
     private String title;
     private String content;
-    private String date;
+    private String createTime;
+    private String lastTime;
     private int finish;
 
     public Long getId() {
@@ -32,12 +33,20 @@ public void setContent(String content) {
         this.content = content;
     }
 
-    public String getDate() {
-        return date;
+    public String getCreateTime() {
+        return createTime;
     }
 
-    public void setDate(String date) {
-        this.date = date;
+    public void setCreateTime(String createTime) {
+        this.createTime = createTime;
+    }
+
+    public String getLastTime() {
+        return lastTime;
+    }
+
+    public void setLastTime(String lastTime) {
+        this.lastTime = lastTime;
     }
 
     public int getFinish() {
@@ -50,6 +59,7 @@ public void setFinish(int finish) {
 
     @Override
     public String toString() {
-        return "['title': " + getTitle() + ", 'content':" + getContent() + ", 'date':" + getDate() + "]";
+        return String.format("[title: %s, content:%s, last_time:%s, create_time:%s， finish: %d]",
+                getTitle(), getContent(), getLastTime(), getCreateTime(), getFinish());
     }
 }

students/soft1714080902223/app/src/main/java/edu/hzuapps/androidlabs/presenter/JsonService.java

@@ -1,44 +1,36 @@
 package edu.hzuapps.androidlabs.presenter;
 
-import org.json.JSONArray;
 import org.json.JSONObject;
 
 import java.io.BufferedReader;
 import java.io.InputStream;
 import java.io.InputStreamReader;
-import java.net.HttpURLConnection;
-import java.net.URL;
 
-import edu.hzuapps.androidlabs.soft1714080902223.R;
 
 public class JsonService {
 
-
     public JSONObject getHomeJson(){
         JSONObject jsonObject = null;
         try {
             //建立http连接
-            String url_s = "https://raw.githubusercontent.com/TRLVMMR/android-" +
+            String url = "https://raw.githubusercontent.com/TRLVMMR/android-" +
                     "labs-2019/bd5d63db1f4aae84b62860eb66f8733710936206/students/s" +
                     "oft1714080902223/app/src/main/info.json";
-            URL url = new URL(url_s);
-            HttpURLConnection conn = (HttpURLConnection)url.openConnection();
-            conn.setConnectTimeout(5000);
-            conn.setUseCaches(false);
-            conn.connect();
-            //获取文件放入输出流中
-            InputStream inputStream = conn.getInputStream();
+            // 通过url得到文件字节流
+            InputStream inputStream = NetworkService.getInternetData(url);
+            //如果没有获取到数据，返回null
+            if(inputStream == null){
+                return null;
+            }
             InputStreamReader input = new InputStreamReader(inputStream);
             BufferedReader buffer = new BufferedReader(input);
-            //当返回成功时，读取json数据
-            if(conn.getResponseCode() == 200){
-                String inputLine;
-                StringBuffer resultData  = new StringBuffer();
-                while((inputLine = buffer.readLine())!= null){
-                    resultData.append(inputLine);
-                }
-                jsonObject = new JSONObject(resultData.toString());
+            String inputLine;
+            StringBuffer resultData = new StringBuffer();
+            while ((inputLine = buffer.readLine()) != null) {
+                resultData.append(inputLine);
             }
+            jsonObject = new JSONObject(resultData.toString());
+
         } catch(Exception e){
             //如果超时，或者其他异常，输出异常信息
             e.printStackTrace();