hzuapps#6 hzuapps#43 第六次实验

AndroidLabs/app/src/main/java/edu/hzuapps/androidlabs/homeworks/net1414080903229/Net14140903229_Json.json

@@ -1 +1,7 @@
-[{"name":"麦贤军","class":"14网络2班","number":"1414080903229"}]
+[
+	{
+	"name":"麦贤军",
+	"class":"14网络2班",
+	"number":"1414080903229"
+	}
+]

AndroidLabs/app/src/main/java/edu/hzuapps/androidlabs/homeworks/net1414080903229/ShowJsonActivity.java

@@ -0,0 +1,96 @@
+package edu.hzuapps.androidlabs.homeworks.net1414080903229;
+
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
+import android.support.v7.app.AppCompatActivity;
+import android.widget.TextView;
+import android.widget.Toast;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.MalformedURLException;
+import java.net.URL;
+
+/**
+ * Created by Administrator on 2017-6-12.
+ */
+
+public class ShowJsonActivity extends AppCompatActivity {
+    private TextView tv_json;
+    private  String url="https://raw.githubusercontent.com/Feirty/android-labs-2017/" +
+            "master/AndroidLabs/app/src/main/java/edu/hzuapps/androidlabs/homeworks/" +
+            "net1414080903229/Net14140903229_Json.json";
+    Handler handler=new Handler(){
+        @Override
+        public void handleMessage(Message msg) {
+            super.handleMessage(msg);
+            String str= parseJson((String) msg.obj);
+            tv_json.setText(str);
+        }
+    };
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_showjson_net1414080903229);
+        tv_json= (TextView) findViewById(R.id.tv_json);
+        new Thread(){
+            @Override
+            public void run() {
+                super.run();
+                String data=doUrl(url);
+                Message msg=handler.obtainMessage();
+                msg.obj=data;
+                handler.sendMessage(msg);
+            }
+        }.start();
+    }
+    public String doUrl(String u) {
+        try {
+            URL url = new URL(u);
+            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+            conn.setRequestMethod("GET");
+            conn.setConnectTimeout(5000);
+            InputStream is = conn.getInputStream();
+            byte[] b = new byte[1024];
+            StringBuilder sb = new StringBuilder();
+            String a;
+            int len;
+            while ((len=is.read(b)) != -1) {
+                a=new String(b,0,len);
+                sb.append(a);
+            }
+            return sb.toString();
+        } catch (MalformedURLException e) {
+            e.printStackTrace();
+        } catch (IOException e) {
+            Toast.makeText(this, "解析出错", Toast.LENGTH_SHORT).show();
+        }
+        return "";
+    }
+
+    public String parseJson(String data){
+        StringBuilder sb=new StringBuilder();
+        try {
+            JSONArray jsonArray=new JSONArray(data);
+            for (int i=0;i<jsonArray.length();i++){
+                JSONObject object=jsonArray.getJSONObject(i);
+                sb.append("姓名：");
+                sb.append(object.getString("name"));
+                sb.append("\n\n");
+                sb.append("班级：");
+                sb.append(object.getString("class"));
+                sb.append("\n\n");
+                sb.append("学号：");
+                sb.append(object.getString("number"));
+            }
+        } catch (JSONException e) {
+            e.printStackTrace();
+        }
+        return sb.toString();
+    }
+}

AndroidLabs/app/src/main/res/layout/activity_showjson_net1414080903229.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/activity_show_json"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    >
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_marginTop="20dp"
+        android:id="@+id/tv_json"/>
+</RelativeLayout>