hzuapps#6 hzuapps#405 第六次实验

students/sec1814080911138/HttpClientActivity.java

@@ -0,0 +1,107 @@
+package edu.hzuapp.androidlabs.sec1814080911138;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.MalformedURLException;
+import java.net.ProtocolException;
+import java.net.URL;
+import java.net.URLDecoder;
+
+public class HttpClientActivity extends AppCompatActivity {
+    TextView textView = null;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_http_client);
+
+        ((Button) findViewById(R.id.button_get_issues)).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Thread thread = new Thread(new Runnable() {
+                    @Override
+                    public void run() {
+                        textView = findViewById(R.id.text1);
+
+                        String jsonText = getGitHubIssues();
+                        if (jsonText != null) {
+                            try {
+                                JSONArray jsonArr = new JSONArray(jsonText);
+                                JSONObject jsonObj = (JSONObject) jsonArr.get(1);
+                                int number = jsonObj.getInt("number");
+                                final int num = number;
+                                System.out.println("NUMBER = " + number);
+                                textView.post(new Runnable() {
+                                    @Override
+                                    public void run() {
+                                        textView.setText("NUMBER = " + num+"\n"+"详细打印情况请看控制台");
+                                    }
+                                });
+                                //((EditText) thisActivity.findViewById(R.id.first_node_number)).setText(Integer.toString(number));
+                            } catch (JSONException e) {
+                                e.printStackTrace();
+                            }
+                        }
+                    }
+                });
+                thread.start();
+            }
+        });
+
+
+    }
+
+    private String getGitHubIssues() {
+        String gitApi = "https://api.github.com/repos/hzuapps/android-labs-2020/issues";
+        //gitApi = "https://www.baidu.com";
+        URL url = null;
+        String jsonText = null;
+        try {
+            url = new URL(gitApi);
+            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+            // HttpClient
+            // OKHttp
+            //connection.setDoOutput(true);
+            //connection.setDoInput(true);
+            //connection.setRequestMethod("POST");
+            //connection.setUseCaches(false);
+            //connection.setInstanceFollowRedirects(true);
+            connection.setRequestProperty("Content-Type", "application/json");
+            connection.connect();
+            BufferedReader reader = new BufferedReader(new
+                    InputStreamReader(connection.getInputStream()));
+            String lines;
+            StringBuffer sb = new StringBuffer("");
+            while ((lines = reader.readLine()) != null) {
+                lines = URLDecoder.decode(lines, "utf-8");
+                sb.append(lines);
+            }
+            System.out.println(sb);
+            jsonText = sb.toString();
+            reader.close();
+            // 断开连接
+            connection.disconnect();
+        } catch (MalformedURLException e) {
+            e.printStackTrace();
+        } catch (ProtocolException e) {
+            e.printStackTrace();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return jsonText;
+    }
+}

students/sec1814080911138/activity_http_client.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<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"
+android:layout_height="match_parent"
+tools:context=".HttpClientActivity">
+
+    <Button
+        android:id="@+id/button_get_issues"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Button"
+        tools:layout_editor_absoluteX="29dp"
+        tools:layout_editor_absoluteY="27dp" />
+
+<TextView
+    android:id="@+id/text1"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:text="TextView"
+    android:layout_below="@id/button_get_issues"
+    android:textSize="30dp"
+    />
+
+
+</RelativeLayout>