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第一步:新建一个Android工程命名为htmlViewer目录结构如下图:
第二步:修改activity_main.xml布局文件代码如下:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"tools:context=".MainActivity" ><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="@string/htmlPath" /><EditTextandroid:id="@+id/et_path"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="@string/path" /><Buttonandroid:id="@+id/btn_view"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="@string/view" /><ScrollViewandroid:layout_width="wrap_content"android:layout_height="wrap_content" ><TextViewandroid:id="@+id/tv_code_view"android:layout_width="match_parent"android:layout_height="wrap_content" /></ScrollView></LinearLayout>strings.xml:
<?xml version="1.0" encoding="utf-8"?>
<resources><string name="app_name">网页源码查看器</string><string name="action_settings">Settings</string><string name="hello_world">Hello world!</string><string name="htmlPath">网页地址</string><string name="view">查看</string><string name="success">获取源码成功！</string><string name="fail">获取源码失败！</string><string name="path">http://www.so.com</string></resources>第三步：编写MianActivity类：
package cn.leigo.htmlviewer;import java.io.IOException;import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import cn.leigo.service.CodeService;public class MainActivity extends Activity implements OnClickListener {private EditText mHtmlPathEditText;private Button mViewButton;private TextView mCodeViewTextView;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);mHtmlPathEditText = (EditText) findViewById(R.id.et_path);mViewButton = (Button) findViewById(R.id.btn_view);mCodeViewTextView = (TextView) findViewById(R.id.tv_code_view);mViewButton.setOnClickListener(this);}@Overridepublic void onClick(View v) {String path = mHtmlPathEditText.getText().toString();String code;try {code = CodeService.getHtml(path);mCodeViewTextView.setText(code);Toast.makeText(this, R.string.success, Toast.LENGTH_SHORT).show();} catch (IOException e) {e.printStackTrace();Toast.makeText(this, R.string.fail, Toast.LENGTH_SHORT).show();}}
}
业务类CodeService:
package cn.leigo.service;import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;import javax.net.ssl.HttpsURLConnection;import cn.leigo.utils.StreamTool;public class CodeService {/*** 获取网页HTML源代码* * @param path* 网页路径* @return* @throws IOException*/public static String getHtml(String path) throws IOException {String code = "";URL url = new URL(path);HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setConnectTimeout(5000);conn.setRequestMethod("GET");if (conn.getResponseCode() == HttpsURLConnection.HTTP_OK) {InputStream inputStream = conn.getInputStream();byte[] data = StreamTool.read(inputStream);code = new String(data, "UTF-8");}return code;}}
工具类StreamTool：
package cn.leigo.utils;import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;public class StreamTool {/*** 读取流中的数据* * @param inputStream* @return* @throws IOException*/public static byte[] read(InputStream inputStream) throws IOException {ByteArrayOutputStream baos = new ByteArrayOutputStream();byte[] buffer = new byte[1024];int len = 0;while ((len = inputStream.read(buffer)) != -1) {baos.write(buffer, 0, len);}inputStream.close();return baos.toByteArray();}}
最后别忘了在AndroidManifest.xml文件中添加权限：
<uses-permission android:name="android.permission.INTERNET" /> 运行上述工程查看效果图:
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