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" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/htmlPath" /> <EditText android:id="@+id/et_path" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/path" /> <Button android:id="@+id/btn_view" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/view" /> <ScrollView android:layout_width="wrap_content" android:layout_height="wrap_content" > <TextView android:id="@+id/tv_code_view" android:layout_width="match_parent" android:layout_height="wrap_content" /> </ScrollView> </LinearLayout>
<?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>
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; @Override protected 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); } @Override public 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(); } } }
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; } }
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(); } }
<uses-permission android:name="android.permission.INTERNET" />