Android 网页html源码的查看器

StreamTool.java:

package util;import java.io.ByteArrayOutputStream;import java.io.InputStream;public class StreamTool {/** * 把一个inputstream里面的内容转化成一个byte[] */public static byte[] getBytes(InputStream is) throws Exception {ByteArrayOutputStream bos = new ByteArrayOutputStream();byte[] buffer = new byte[1024];int len = 0;while ((len = is.read(buffer)) != -1) {bos.write(buffer, 0, len);}is.close();bos.flush();byte[] result = bos.toByteArray();System.out.println(new String(result));return result;}}

NetUtil.java:

package service;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.URL;import util.StreamTool;import android.widget.Toast;public class NetUtil {public static String getHtml(String address) throws Exception {URL url = new URL(address);HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setReadTimeout(5000);conn.setRequestMethod("GET");int code = conn.getResponseCode();if (code == 200) {InputStream is = conn.getInputStream();byte[] result = StreamTool.getBytes(is);return new String(result);} else {throw new IllegalStateException("访问失败");}}}

MainActivity.java:

package com.example.httpviewer;import service.NetUtil;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;public class MainActivity extends Activity implements OnClickListener {private EditText mEtAddress;private Button mBtView;private TextView mTvView;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);mBtView = (Button) this.findViewById(R.id.chakan);mEtAddress = (EditText) this.findViewById(R.id.editText1);mTvView = (TextView) this.findViewById(R.id.TextView1);mBtView.setOnClickListener(this);}@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.chakan:// 按钮对应的点击事件String address = mEtAddress.getText().toString().trim();if ("".equals(address)) {Toast.makeText(this, "地址不能为空", Toast.LENGTH_SHORT).show();return;}try {String html = NetUtil.getHtml(address);mTvView.setText(html);} catch (Exception e) {e.printStackTrace();Toast.makeText(this, "获取数据失败", 0).show();}break;}}}

main.xml:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/input_address" />    <EditText        android:id="@+id/editText1"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:lines="2"        android:text="http://www.baidu.com" />    <Button        android:id="@+id/chakan"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="@string/go" />    <ScrollView        android:layout_width="match_parent"        android:layout_height="match_parent" >        <TextView            android:id="@+id/TextView1"            android:layout_width="match_parent"            android:layout_height="match_parent"            android:scaleType="center" />    </ScrollView></LinearLayout>

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