hzuapps#6 hzuapps#40 第六次作业

Author: zhangdixi

AndroidLabs/app/src/main/java/edu/hzuapps/androidlabs/homeworks/net1414080903105/JsonNet1414080903105Activity.java

@@ -0,0 +1,95 @@
+package edu.hzuapps.androidlabs.homeworks.net1414080903105;
+
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
+import android.support.v7.app.AppCompatActivity;
+import android.widget.TextView;
+
+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;
+
+import edu.hzuapps.androidlabs.R;
+
+public class JsonNet1414080903105Activity extends AppCompatActivity {
+
+    TextView tv;
+
+    Handler handler=new Handler(){
+        @Override
+        public void handleMessage(Message msg) {
+            super.handleMessage(msg);
+            String a= parseJson((String) msg.obj);
+            tv.setText(a);
+        }
+    };
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_json_net1414080903105);
+        tv= (TextView) findViewById(R.id.tv_json);
+        new Thread(){
+            @Override
+            public void run() {
+                super.run();
+                String a=a("https://raw.githubusercontent.com/zhangdixi/android-labs-2017" +
+                        "/master/AndroidLabs/app/src/main/res/values/ds.json");
+                Message msg=handler.obtainMessage();
+                msg.obj=a;
+                handler.sendMessage(msg);
+            }
+        }.start();
+    }
+
+    public String a(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) {
+            e.printStackTrace();
+        }
+        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："+object.getString("name"));
+                sb.append("\n\n");
+                sb.append("工作："+object.getString("job"));
+                sb.append("\n\n");
+                sb.append(object.getString("sex"));
+                sb.append("\n\n");
+                sb.append(object.getString("age"));
+            }
+        } catch (JSONException e) {
+            e.printStackTrace();
+        }
+        return sb.toString();
+    }
+}

AndroidLabs/app/src/main/res/layout/activity_json_net1414080903105.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical" android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <TextView
+        android:padding="15dp"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:id="@+id/tv_json"/>
+
+</LinearLayout>