Merge pull request #1270 from 18CS118/master

#4 #315 提交实验4

students/sec1814080911118/app/src/main/java/edu/hzuapps/pyq/LookPyqActivity.java

@@ -5,10 +5,20 @@
 import android.content.Intent;
 import android.os.Bundle;
 import android.view.View;
+import android.widget.AdapterView;
 import android.widget.Button;
+import android.widget.EditText;
+import android.widget.ListView;
+import android.widget.Toast;
 
-public class LookPyqActivity extends AppCompatActivity {
+import java.util.ArrayList;
+import java.util.List;
+
+import edu.hzuapps.pyq.listview.Message;
+import edu.hzuapps.pyq.listview.MessageAdapter;
 
+public class LookPyqActivity extends AppCompatActivity {
+    private List<Message> messageList=new ArrayList<>();
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -22,5 +32,66 @@ public void onClick(View v) {
                 startActivity(intent);
             }
         });
+
+//        Button sendBtn = (Button)findViewById(R.id.sendBtn);
+//        sendBtn.setOnClickListener(new View.OnClickListener(){
+//            @Override
+//            public void onClick(View view) {
+//                String content = ((EditText) findViewById(R.id.content)).getText().toString();
+//                if(!content.isEmpty()){
+//                    Message message = new Message(content, R.drawable.pyqlogo);
+//                    messageList.add(message);
+//                }
+//            }
+//        });
+
+        final LookPyqActivity thisActivity = this;
+
+//        Button listBtn = (Button) findViewById(R.id.button_main);
+//        listBtn.setOnClickListener(new View.OnClickListener() {
+//            @Override
+//            public void onClick(View v) {
+//                Intent intent = new Intent(thisActivity,LookPyqActivity.class);
+//                startActivity(intent);
+//            }
+//        });
+
+        // 先拿到数据并放在适配器上
+        initMessage(); //初始化水果数据
+        MessageAdapter adapter=new MessageAdapter(LookPyqActivity.this,R.layout.message_item,messageList);
+
+        // 将适配器上的数据传递给listView
+        ListView listView=findViewById(R.id.list_view);
+        listView.setAdapter(adapter);
+
+        // 为ListView注册一个监听器，当用户点击了ListView中的任何一个子项时，就会回调onItemClick()方法
+        // 在这个方法中可以通过position参数判断出用户点击的是那一个子项
+        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
+            @Override
+            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
+                Message message=messageList.get(position);
+                Toast.makeText(LookPyqActivity.this,message.getName(),Toast.LENGTH_SHORT).show();
+            }
+        });
+    }
+
+    // 初始化数据
+    private void initMessage(){
+        Message a=new Message("一万年太长，和你在一起，只争朝夕。",R.drawable.pyqlogo);
+        messageList.add(a);
+        Message b=new Message("情书给你一封，情话给你一句，余生给你一人。",R.drawable.pyqlogo);
+        messageList.add(b);
+        Message c=new Message("我想要的未来，就是每天早上起床，都能看见你和阳光都在。",R.drawable.pyqlogo);
+        messageList.add(c);
+        Message d=new Message("想要的，就是无论有多难，依然有那么一个人和我相依相守。",R.drawable.pyqlogo);
+        messageList.add(d);
+        Message d2=new Message("没我喜欢风，无拘无束，我喜欢星辰，安静明亮，我喜欢深海中的鲸，孤独澄净，我喜欢动漫，温暖心弦，我喜欢你，没有道理。",R.drawable.pyqlogo);
+        messageList.add(d2);
+        Message d3=new Message("千世界，处处繁花似锦，能够遇见你三生有幸。",R.drawable.pyqlogo);
+        messageList.add(d3);
+        Message d4=new Message("终于遇见了你，从此不必在意阴晴风雨，从此随心所欲地老去。",R.drawable.pyqlogo);
+        messageList.add(d4);
+
+
     }
 }

students/sec1814080911118/app/src/main/java/edu/hzuapps/pyq/Sec1814080911118Activity.java

@@ -7,8 +7,13 @@
 import android.view.View;
 import android.widget.Button;
 
-public class Sec1814080911118Activity extends AppCompatActivity {
+import java.util.ArrayList;
+import java.util.List;
+
+import edu.hzuapps.pyq.listview.Message;
 
+public class Sec1814080911118Activity extends AppCompatActivity {
+    private List<Message> messageList=new ArrayList<>();
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -24,5 +29,7 @@ public void onClick(View v) {
                 startActivity(intent);
             }
         });
+
     }
+
 }

students/sec1814080911118/app/src/main/java/edu/hzuapps/pyq/SendPyqActivity.java

@@ -3,12 +3,15 @@
 import androidx.appcompat.app.AppCompatActivity;
 
 import android.content.Intent;
+import android.media.session.MediaSession;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.Button;
+import android.widget.EditText;
 
-public class SendPyqActivity extends AppCompatActivity {
+import edu.hzuapps.pyq.listview.Message;
 
+public class SendPyqActivity extends AppCompatActivity {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

students/sec1814080911118/app/src/main/java/edu/hzuapps/pyq/listview/Message.java

@@ -0,0 +1,28 @@
+package edu.hzuapps.pyq.listview;
+
+public class Message {
+    private String name;
+    private int imageId;
+
+    public Message(String name,int imageId){
+        this.name=name;
+        this.imageId=imageId;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public void setImageId(int imageId) {
+        this.imageId = imageId;
+    }
+
+    public String getName(){
+        return name;
+    }
+
+    public int getImageId(){
+        return  imageId;
+    }
+
+}

students/sec1814080911118/app/src/main/java/edu/hzuapps/pyq/listview/MessageAdapter.java

@@ -0,0 +1,65 @@
+package edu.hzuapps.pyq.listview;
+
+import android.content.Context;
+import android.view.View;
+import android.widget.ArrayAdapter;
+
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import java.util.List;
+
+import edu.hzuapps.pyq.R;
+import edu.hzuapps.pyq.listview.Message;
+
+public class MessageAdapter extends ArrayAdapter<Message> {
+    private int resourceId;
+
+    // 适配器的构造函数，把要适配的数据传入这里
+    public MessageAdapter(Context context, int textViewResourceId, List<Message> objects){
+        super(context,textViewResourceId,objects);
+        resourceId=textViewResourceId;
+    }
+
+    // convertView 参数用于将之前加载好的布局进行缓存
+    @Override
+    public View getView(int position, View convertView, ViewGroup parent){
+        Message message=getItem(position); //获取当前项的Fruit实例
+
+        // 加个判断，以免ListView每次滚动时都要重新加载布局，以提高运行效率
+        View view;
+        ViewHolder viewHolder;
+        if (convertView==null){
+
+            // 避免ListView每次滚动时都要重新加载布局，以提高运行效率
+            view=LayoutInflater.from(getContext()).inflate(resourceId,parent,false);
+
+            // 避免每次调用getView()时都要重新获取控件实例
+            viewHolder=new ViewHolder();
+            viewHolder.messageName=view.findViewById(R.id.message_content);
+            viewHolder.messageImage=view.findViewById(R.id.message_image);
+
+            // 将ViewHolder存储在View中（即将控件的实例存储在其中）
+            view.setTag(viewHolder);
+        } else{
+            view=convertView;
+            viewHolder=(ViewHolder) view.getTag();
+        }
+
+        // 获取控件实例，并调用set...方法使其显示出来
+        viewHolder.messageImage.setImageResource(message.getImageId());
+        viewHolder.messageName.setText(message.getName());
+        return view;
+    }
+
+    // 定义一个内部类，用于对控件的实例进行缓存
+    class ViewHolder{
+        ImageView messageImage;
+        TextView messageName;
+    }
+}

students/sec1814080911118/app/src/main/res/layout/activity_look_pyq.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<RelativeLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
@@ -10,7 +11,12 @@
         android:id="@+id/btnLook"
         android:layout_width="120dp"
         android:layout_height="70dp"
-        android:text="发朋友圈"
-        tools:layout_editor_absoluteX="275dp"
-        tools:layout_editor_absoluteY="16dp" />
-</androidx.constraintlayout.widget.ConstraintLayout>
+        android:text="@string/look_pyq"
+        android:layout_alignParentRight="true"/>
+
+    <ListView
+        android:id="@+id/list_view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_marginTop="70sp"/>
+</RelativeLayout>

students/sec1814080911118/app/src/main/res/layout/activity_main.xml

@@ -10,14 +10,16 @@
         android:id="@+id/button_main"
         android:layout_width="407dp"
         android:layout_height="50dp"
-        android:layout_marginTop="300dp"
+        android:layout_marginTop="400dp"
         android:text="朋友圈" />
 
         <ImageView
-        android:layout_width="150sp"
-        android:layout_height="150sp"
+        android:layout_width="match_parent"
+        android:layout_height="350dp"
         android:src="@drawable/pyqlogo" />
 
 
 
+
+
 </RelativeLayout>

students/sec1814080911118/app/src/main/res/layout/activity_send_pyq.xml

@@ -1,10 +1,21 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout
+<LinearLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".SendPyqActivity">
+    android:orientation="vertical">
 
-  </androidx.constraintlayout.widget.ConstraintLayout>
+  <EditText
+      android:id="@+id/content"
+      android:layout_width="match_parent"
+      android:layout_height="100sp"
+      android:layout_marginTop="200sp"/>
+  <Button
+      android:id="@+id/sendBtn"
+      android:layout_width="match_parent"
+      android:layout_height="50sp"
+      android:text="@string/submit"/>
+
+  </LinearLayout>

students/sec1814080911118/app/src/main/res/layout/message_item.xml

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+    <View
+        android:layout_width="match_parent"
+        android:layout_height="0.5dp"
+        android:background="#97a791"/>
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="horizontal">
+        <ImageView
+            android:id="@+id/message_image"
+            android:layout_width="50dp"
+            android:layout_height="50dp"
+            android:layout_marginTop="10sp"
+            android:layout_marginBottom="10sp"/>
+
+        <TextView
+            android:id="@+id/message_content"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="10sp"
+            android:layout_marginBottom="10sp"
+            android:layout_gravity="center_vertical"
+            android:layout_marginLeft="10dp"
+            android:layout_marginStart="10dp" />
+    </LinearLayout>
+
+</LinearLayout>

students/sec1814080911118/app/src/main/res/values/colors.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#6200EE</color>
+    <color name="colorPrimaryDark">#3700B3</color>
+    <color name="colorAccent">#03DAC5</color>
+</resources>

students/sec1814080911118/app/src/main/res/values/strings.xml

@@ -1,3 +1,5 @@
 <resources>
     <string name="app_name">PYQ</string>
+    <string name="look_pyq">发朋友圈</string>
+    <string name="submit">提交</string>
 </resources>