android网络编程,是我们学习网络开发的重要课程,在此小弟今天学习了一下,从互联网上获取图片与门户网的源代码。大家肯定很急了吧,先让我们看一下效果先,大家还是很感兴趣的。
如图:
我的宝马牛吧,虚拟的,真的就好了。
让我们看一下原代码是如何写。这可是我的原创哦
- package com.smart.net.activity;
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import android.app.Activity;
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import android.content.Intent;
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import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.os.Bundle;
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import android.util.Log;
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import android.view.View;
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import android.widget.Button;
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import android.widget.EditText;
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import android.widget.ImageView;
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import android.widget.Toast;
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import com.smart.net.utils.NetTool;
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public class DataActivity extends Activity {
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private EditText imagePathText;
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private static final String TAG="DataActivity";
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private ImageView imageView;
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- imagePathText = (EditText) findViewById(R.id.imagepath);
- imageView=(ImageView)findViewById(R.id.imageView);
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- Button button = (Button) findViewById(R.id.button);
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button.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View v) {
- String path = imagePathText.getText().toString();
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try {
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byte[] data=NetTool.getImage(path);
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Bitmap bm=BitmapFactory.decodeByteArray(data, 0, data.length);
- imageView.setImageBitmap(bm);
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} catch (Exception e) {
- Log.i(TAG, e.toString());
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Toast.makeText(DataActivity.this, "获得图片失败", 1).show();
- }
- }
- });
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- Button sinaButton = (Button) findViewById(R.id.sinaButton);
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sinaButton.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View v) {
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Intent intent=new Intent(DataActivity.this,SinaActivity.class);
- startActivity(intent);
- }
- });
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- }
- }
网页类
- package com.smart.net.activity;
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import com.smart.net.utils.NetTool;
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import android.app.Activity;
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import android.os.Bundle;
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import android.util.Log;
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import android.widget.EditText;
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import android.widget.ImageView;
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import android.widget.TextView;
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import android.widget.Toast;
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public class SinaActivity extends Activity {
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private TextView textView;
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private static final String TAG="SinaActivity";
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
- setContentView(R.layout.sina);
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textView=(TextView)this.findViewById(R.id.sina);
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try {
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String html=NetTool.getHtml("http://www.sina.com.cn","GBK");
- textView.setText(html);
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} catch (Exception e) {
- Log.i(TAG, e.toString());
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Toast.makeText(SinaActivity.this, "获得网页失败", 1).show();
- }
- }
- }
方法实现类
- package com.smart.net.utils;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.InputStream;
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import java.net.HttpURLConnection;
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import java.net.URL;
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public class NetTool {
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public static String getHtml(String path,String encoding) throws Exception {
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URL url = new URL(path);
- HttpURLConnection conn = (HttpURLConnection) url.openConnection();
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conn.setRequestMethod("GET");
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conn.setConnectTimeout(6 * 1000);
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- System.out.println(conn.getResponseCode());
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if(conn.getResponseCode()==200){
- InputStream inputStream=conn.getInputStream();
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byte[] data=readStream(inputStream);
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return new String(data,encoding);
- }
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return null;
- }
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public static byte[] getImage(String urlpath) throws Exception {
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URL url = new URL(urlpath);
- HttpURLConnection conn = (HttpURLConnection) url.openConnection();
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conn.setRequestMethod("GET");
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conn.setConnectTimeout(6 * 1000);
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if(conn.getResponseCode()==200){
- InputStream inputStream=conn.getInputStream();
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return readStream(inputStream);
- }
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return null;
- }
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public static byte[] readStream(InputStream inStream) throws Exception {
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ByteArrayOutputStream outstream=new ByteArrayOutputStream();
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byte[] buffer=new byte[1024];
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int len=-1;
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while((len=inStream.read(buffer)) !=-1){
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outstream.write(buffer, 0, len);
- }
- outstream.close();
- inStream.close();
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return outstream.toByteArray();
- }
- }
本文转自 llb988 51CTO博客,原文链接:http://blog.51cto.com/llb988/491535,如需转载请自行联系原作者