android获取互联网图片与源代码――网络编

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;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;

import com.smart.net.utils.NetTool;

public class DataActivity extends Activity {
    private EditText imagePathText;
    private static final String TAG="DataActivity";
    private ImageView imageView;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        imagePathText = (EditText) findViewById(R.id.imagepath);
        imageView=(ImageView)findViewById(R.id.imageView);

        //获取我的宝马车图片
        Button button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                String path = imagePathText.getText().toString();
                try {

                    byte[] data=NetTool.getImage(path);
                    Bitmap bm=BitmapFactory.decodeByteArray(data, 0, data.length);
                    imageView.setImageBitmap(bm);
                } catch (Exception e) {
                    Log.i(TAG, e.toString());
                    Toast.makeText(DataActivity.this, "获得图片失败", 1).show();
                }
            }
        });

//      获取网页源代码
        Button sinaButton = (Button) findViewById(R.id.sinaButton);
        sinaButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                Intent intent=new Intent(DataActivity.this,SinaActivity.class);
                startActivity(intent);
            }
        });

    }
}

网页类 

package com.smart.net.activity;

import com.smart.net.utils.NetTool;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class SinaActivity extends Activity {
    private TextView textView;
    private static final String TAG="SinaActivity";
//  获取网页源代码
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.sina);

        textView=(TextView)this.findViewById(R.id.sina);
        try {
            String html=NetTool.getHtml("http://www.sina.com.cn","GBK");
            textView.setText(html);
        } catch (Exception e) {
            Log.i(TAG, e.toString());
            Toast.makeText(SinaActivity.this, "获得网页失败", 1).show();
        }
    }
}

方法实现类

 

package com.smart.net.utils;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;


public class NetTool {
    /**
     * 获得url代码数据
     * */

    public static String getHtml(String path,String encoding) throws Exception {
        URL url = new URL(path);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("GET");
        conn.setConnectTimeout(6 * 1000);
        // 别超过10秒。
        System.out.println(conn.getResponseCode());
        if(conn.getResponseCode()==200){
            InputStream inputStream=conn.getInputStream();
            byte[] data=readStream(inputStream);
            return new String(data,encoding);
        }
        return null;
    }

/**
 * 获取指定路径，的数据。
 *
 * **/
    public static byte[] getImage(String urlpath) throws Exception {
        URL url = new URL(urlpath);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("GET");
        conn.setConnectTimeout(6 * 1000);
        // 别超过10秒。
        if(conn.getResponseCode()==200){
            InputStream inputStream=conn.getInputStream();
            return readStream(inputStream);
        }
        return null;
    }

    /**
     * 读取数据
     * 输入流
     *
     * */
    public static byte[] readStream(InputStream inStream) throws Exception {
        ByteArrayOutputStream outstream=new ByteArrayOutputStream();
        byte[] buffer=new byte[1024];
        int len=-1;
        while((len=inStream.read(buffer)) !=-1){
            outstream.write(buffer, 0, len);
        }
        outstream.close();
        inStream.close();

    return outstream.toByteArray();
}
}