android实现网页源码查看器

首先为布局文件源码：

<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=".activity.LookWebPageCodeActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <EditText
            android:id="@+id/et_address"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="请输入你需要查看源码的网址"/>

        <Button
            android:id="@+id/bt_look"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="查看"/>

        
        <ScrollView
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <TextView
                android:id="@+id/tv_content"
                android:layout_width="match_parent"
                android:layout_height="match_parent" />

        ScrollView>

    LinearLayout>

android.support.constraint.ConstraintLayout>

界面布局：

具体实现源码：

public class LookWebPageCodeActivity extends AppCompatActivity implements View.OnClickListener {

    private EditText et_address;
    private Button bt_look;
    private TextView tv_content;
    private Handler handler = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        init();
        initEvent();
        handler = new Handler(){
            @Override
            public void handleMessage(Message msg) {
                String temp = (String) msg.obj;
                tv_content.setText(temp);
            }
        };
    }

    /**
     * 初始化控件
     */
    private void init(){
        et_address = findViewById(R.id.et_address);
        et_address.setText("http://10.0.2.2:8080");
        bt_look = findViewById(R.id.bt_look);
        tv_content = findViewById(R.id.tv_content);
    }

    /**
     * 事件监听
     */
    private void initEvent(){
        bt_look.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        final String path = et_address.getText().toString().trim();
        new Thread(){
            @Override
            public void run() {
                try {
                    URL url = new URL(path);
                    HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
                    //设置请求方法
                    urlConnection.setRequestMethod("POST");
                    //连接超时的时间
                    urlConnection.setConnectTimeout(10000);
                    //获取响应码
                    int code = urlConnection.getResponseCode();
                    LogUtils.LOGI("LookWebPageCodeActivity","code = " + code);
                    if (code == 200){
                        InputStream inputStream = urlConnection.getInputStream();
                        String content = Utils.getStringFromStream(inputStream);
                        LogUtils.LOGI("LookWebPageCodeActivity","content = " + content);
                        Message msg = new Message();
                        msg.obj = content;
                        handler.handleMessage(msg);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }.start();

    }
}