Merge pull request #2641 from spemed/master

#6 第六次实验 spemed

com1614080901139/app/src/main/AndroidManifest.xml

@@ -1,7 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="edu.hzuapps.androidlabs.com1614080901139">
-
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
+    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
+    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
@@ -18,8 +23,9 @@
         </activity>
         <activity
             android:name=".MainActivity"
-            android:theme="@style/Theme.AppCompat.DayNight.NoActionBar"></activity>
-        <activity android:name=".Main2Activity"></activity>
+            android:theme="@style/Theme.AppCompat.DayNight.NoActionBar" />
+        <activity android:name=".Main2Activity" />
+        <activity android:name=".jsonActivity"></activity>
     </application>
 
 </manifest>

com1614080901139/app/src/main/java/edu/hzuapps/androidlabs/com1614080901139/Main2Activity.java

@@ -1,24 +1,35 @@
 package edu.hzuapps.androidlabs.com1614080901139;
 
+import android.content.Intent;
 import android.content.SharedPreferences;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
 import android.widget.TextView;
 
 public class Main2Activity extends AppCompatActivity {
+
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main2);
-
         TextView user=(TextView) findViewById(R.id.user);
         SharedPreferences pref=getSharedPreferences("user",MODE_PRIVATE);
         String userName=pref.getString("userName","");
         user.setText(userName);
         TextView password=(TextView) findViewById(R.id.password);
         String passWord=pref.getString("passWord","");
         password.setText(passWord);
+        Button button=(Button)findViewById(R.id.button);
+        button.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent intent=new Intent(Main2Activity.this,jsonActivity.class);
+                startActivity(intent);
+            }
+        });
 
     }
 }

com1614080901139/app/src/main/java/edu/hzuapps/androidlabs/com1614080901139/jsonActivity.java

@@ -0,0 +1,94 @@
+package edu.hzuapps.androidlabs.com1614080901139;
+
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.util.Log;
+import android.widget.ArrayAdapter;
+import android.widget.ListView;
+
+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 java.util.ArrayList;
+import java.util.List;
+
+public class jsonActivity extends AppCompatActivity {
+    private String text;
+    private ListView listView;
+    private ArrayAdapter<String> adapter;
+    private List<String> list=new ArrayList<>();
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_json);
+        listView=(ListView)findViewById(R.id.listview);
+        getjson();
+    }
+    public void getjson()
+    {
+        new Thread(new Runnable() {
+            @Override
+            public void run() {
+                try {
+                    URL url = new URL("https://raw.githubusercontent.com/1614080901144/android-labs-2018/master/com1614080901144/content.json");
+                    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+                    connection.setRequestMethod("GET");
+                    connection.setConnectTimeout(8000);
+                    connection.setReadTimeout(8000);
+                    connection.setUseCaches(false);
+                    connection.connect();
+                    InputStream in = connection.getInputStream();
+                    InputStreamReader input=new InputStreamReader(in);
+                    BufferedReader reader=new BufferedReader(input);
+                    if (connection.getResponseCode() == 200) {
+                        StringBuilder response = new StringBuilder();
+                        String Line;
+                        while ((Line = reader.readLine()) != null) {
+                            response.append(Line);
+                        }
+                        text = response.toString();
+                        Log.v("out---------------->",text);
+                        analyzejson();
+                    }
+                }
+                catch(Exception e)
+                {
+                    e.printStackTrace();
+                }
+                runOnUiThread(new Runnable() {
+                    @Override                    public void run() {
+                        adapter=new ArrayAdapter<String>(jsonActivity.this,android.R.layout.simple_list_item_1,list);
+                        listView.setAdapter(adapter);
+                    }
+                });
+            }
+        }).start();
+    }
+    public void analyzejson()
+    {
+        try{
+            JSONArray jsonArray=new JSONArray(text);
+            for(int a=0;a<jsonArray.length();a++)
+            {
+                JSONObject jsonObject=jsonArray.getJSONObject(a);
+                String number=jsonObject.getString("number");
+                String number1=jsonObject.getString("number1");
+                String number2=jsonObject.getString("number2");
+                String add;
+                add=number+"    "+number1+"     "+number2;
+                list.add(add);
+                Log.v("结果",add);
+            }
+
+        }
+        catch (Exception e)
+        {
+            e.printStackTrace();
+        }
+    }
+}

com1614080901139/app/src/main/res/drawable-v24/ic_launcher_foreground.xml

@@ -0,0 +1,34 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportHeight="108"
+    android:viewportWidth="108">
+    <path
+        android:fillType="evenOdd"
+        android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z"
+        android:strokeColor="#00000000"
+        android:strokeWidth="1">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="78.5885"
+                android:endY="90.9159"
+                android:startX="48.7653"
+                android:startY="61.0927"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M66.94,46.02L66.94,46.02C72.44,50.07 76,56.61 76,64L32,64C32,56.61 35.56,50.11 40.98,46.06L36.18,41.19C35.45,40.45 35.45,39.3 36.18,38.56C36.91,37.81 38.05,37.81 38.78,38.56L44.25,44.05C47.18,42.57 50.48,41.71 54,41.71C57.48,41.71 60.78,42.57 63.68,44.05L69.11,38.56C69.84,37.81 70.98,37.81 71.71,38.56C72.44,39.3 72.44,40.45 71.71,41.19L66.94,46.02ZM62.94,56.92C64.08,56.92 65,56.01 65,54.88C65,53.76 64.08,52.85 62.94,52.85C61.8,52.85 60.88,53.76 60.88,54.88C60.88,56.01 61.8,56.92 62.94,56.92ZM45.06,56.92C46.2,56.92 47.13,56.01 47.13,54.88C47.13,53.76 46.2,52.85 45.06,52.85C43.92,52.85 43,53.76 43,54.88C43,56.01 43.92,56.92 45.06,56.92Z"
+        android:strokeColor="#00000000"
+        android:strokeWidth="1" />
+</vector>

com1614080901139/app/src/main/res/layout/activity_json.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout 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"
+    android:layout_height="match_parent"
+    tools:context="edu.hzuapps.androidlabs.com1614080901139.jsonActivity">
+    <ListView
+        android:id="@+id/listview"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"></ListView>
+
+</android.support.constraint.ConstraintLayout>

com1614080901139/app/src/main/res/layout/activity_main2.xml

@@ -46,5 +46,10 @@
             android:textSize="25sp"
             />
     </LinearLayout>
+    <Button
+        android:id="@+id/button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="json"/>
 
 </LinearLayout>

com1614080901139/report6.md

@@ -0,0 +1,22 @@
+# 一、实验目的
+    1 掌握Android网络访问方法；
+    2 理解XML和JSON表示数据的方法。
+
+# 二、实验要求
+
+    1 从网络下载一个文件（图片、MP3、MP4）；
+    2 保存到手机，在应用中使用文件；
+    3 将应用运行结果截图。
+
+
+# 三、实验步骤
+
+    1 新建一个Activity用来保存从网络上下载的图片
+    2 在AddPictureActivity.java文件中加入跳转到ThirdMainActivity.java相关代码
+    3 在activity_add_picture.xml和activity_third_main.xml文件中加入相关页面设计代码
+    4 在ThirdMainActivity.java文件中加入下载图片的相关代码
+    5 将app安装在手机中并把结果截图
+
+# 四、实验体会
+
+    本次实验室安卓课程的最后一次实验。本学期的课程让我学习到了很多，学会怎么去创建一个安卓项目，调试安卓代码。怎么在app中引入网络图片。老师教学很有水平，要求同学们使用git上传提交文件，便利了同学们提交作业，也让我们学习到了非常有益的新知识