android 各种简单的获取网页源码方式

提示 需要在AndroidManifest.xml添加访问网络的权限

<uses-permission android:name="android.permission.INTERNET"/>

以下为代码

package com.example.gethtmlcontant;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.URL;import org.apache.http.HttpResponse;import org.apache.http.HttpStatus;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpPost;import org.apache.http.impl.client.DefaultHttpClient;import android.os.Bundle;import android.view.View;import android.widget.TextView;import android.app.Activity;public class MainActivity extends Activity {private TextView tv_html_contant;private static final String DEFAULT_URI = "http://xxxxxxxx.com";@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);tv_html_contant = (TextView) findViewById(R.id.tv_html_contant);}/** * 设置内容到文本框上 *  * @param s */private void setContant(final String s) {runOnUiThread(new Runnable() {@Overridepublic void run() {if (tv_html_contant != null) {tv_html_contant.setText(s);}}});}/** * 清空文本框 *  * @param s */public void clearText(View v) {if (tv_html_contant != null) {tv_html_contant.setText("");}}/** * get 方式 *  * @param v */public void setDoGet(View v) {new Thread() {public void run() {HttpClient mHttpClient = new DefaultHttpClient();HttpGet get = new HttpGet(DEFAULT_URI);try {HttpResponse response = mHttpClient.execute(get);if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {// 如果请求成功，则设置到界面上setContant(inStream2String(response.getEntity().getContent()));}} catch (Exception e) {e.printStackTrace();}};}.start();}/** * post 方式 *  * @param v */public void setDoPost(View v) {new Thread() {public void run() {HttpClient mHttpClient = new DefaultHttpClient();HttpPost httpPost = new HttpPost(DEFAULT_URI);//添加参数 这里不需要//List <NameValuePair> params = new ArrayList<NameValuePair>();  //        params.add(new BasicNameValuePair("key", "values"));  //        try {//httpPost.setEntity(new UrlEncodedFormEntity(params,HTTP.UTF_8));//} catch (UnsupportedEncodingException e1) {//e1.printStackTrace();//}         try {HttpResponse response = mHttpClient.execute(httpPost);System.out.println( response.getStatusLine().getStatusCode()+"");if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {// 如果请求成功，则设置到界面上setContant(inStream2String(response.getEntity().getContent()));}} catch (Exception e) {e.printStackTrace();}};}.start();}/** * HttpURLConnection 方式 *  * @param v */public void setHttpConnection(View v) {new Thread() {public void run() {HttpURLConnection connection = null;try {URL url = new URL(DEFAULT_URI);connection = (HttpURLConnection) url.openConnection();// 设置请求方式connection.setRequestMethod("GET");// 设置请求超时的时间connection.setConnectTimeout(4000);if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {// 如果请求成功，则设置到界面上setContant(inStream2String(connection.getInputStream()));}} catch (Exception e) {e.printStackTrace();}};}.start();}/** * 从输入流中读取字串 *  * @param is * @return */private String inStream2String(InputStream is) {String temp = null;ByteArrayOutputStream bos = new ByteArrayOutputStream();byte[] b = new byte[1024];int length = -1;try {while ((length = is.read(b)) != -1) {bos.write(b, 0, length);}temp = new String(bos.toByteArray());} catch (IOException e) {e.printStackTrace();return null;} finally {if (bos != null) {try {bos.close();bos = null;} catch (IOException e) {e.printStackTrace();}}}return temp;}}

布局文件代码

<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:gravity="center_vertical"    android:orientation="vertical"    tools:context=".MainActivity" >    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content" >        <EditText            android:id="@+id/editText1"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:ems="10" >        </EditText>    </LinearLayout>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:gravity="center" >        <Button            android:id="@+id/button1"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:onClick="setDoGet"            android:text="Get"            android:textSize="10sp" />        <Button            android:id="@+id/button2"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:onClick="setDoPost"            android:text="Post"            android:textSize="10sp" />        <Button            android:id="@+id/button3"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:onClick="setHttpConnection"            android:text="HttpConnection"            android:textSize="10sp" />        <Button            android:id="@+id/button4"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:onClick="clearText"            android:text="CleanText"            android:textSize="10sp" />    </LinearLayout>    <TextView        android:id="@+id/tv_html_contant"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:gravity="center_vertical" /></LinearLayout>