android从internet获取图片

<?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:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="显示下载的网页" />


    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="下载html" />


    <TextView
        android:id="@+id/textView2"
        android:layout_width="81dp"
        android:layout_height="wrap_content"
        android:minLines="5"
        android:text="TextView" />

</LinearLayout>

<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:id="@+id/textview1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />


    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="显示下载的图片" />


    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="显示下载的html" />


    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />


</LinearLayout>

package com.hbsi.csdn.service;


import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;


public class ImageService {


public static byte[] getImage(String path) throws Exception{
URL url=new URL(path);//得到代表路径的url;
HttpURLConnection conn=(HttpURLConnection) url.openConnection();
conn.setConnectTimeout(20*1000);
conn.setRequestMethod("GET");
if (conn.getResponseCode() != 200) throw new RuntimeException("请求url失败");
InputStream in=conn.getInputStream();
ByteArrayOutputStream outStream=new ByteArrayOutputStream();
byte[] buffer=new byte[1024];
int len=-1;
while((len=in.read(buffer))!=-1){
outStream.write(buffer,0,len);
}
byte[] data=outStream.toByteArray();//图片的二进制数组
return data;
}


}

package com.hbsi.csdn.picture;


import com.hbsi.csdn.service.ImageService;


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


public class MainActivity extends Activity {


@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

Button btn = (Button) findViewById(R.id.button1);
Button btn3 = (Button) findViewById(R.id.button3);

btn3.setOnClickListener(new OnClickListener() {


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


});

final ImageView imageview = (ImageView) findViewById(R.id.imageView1);
btn.setOnClickListener(new OnClickListener() {


@Override
public void onClick(View v) {
String path="http://list.image.baidu.com/t/image/w_bizhi.jpg";
try {
byte[] data = ImageService.getImage(path);
Bitmap bm = BitmapFactory.decodeByteArray(data, 0,
data.length);
imageview.setImageBitmap(bm);
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(getBaseContext(), "出错了，找不到图片",1).show();
Log.e("ERR",e.toString());;
}


}


});
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}


}

package com.hbsi.csdn.picture;


import com.hbsi.csdn.service.ImageService;


import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;


public class showhtmlActivity extends Activity {


@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.showhtml);

Button btn2 = (Button) findViewById(R.id.button2);
final TextView tv=(TextView) findViewById(R.id.textView2);

btn2.setOnClickListener(new OnClickListener() {


@Override
public void onClick(View v) {
String path="http://www.sohu.com";
try {
byte[] data = ImageService.getImage(path);

tv.setText(new String(data,"GBK"));

} catch (Exception e) {
e.printStackTrace();
Toast.makeText(getBaseContext(), "出错了，找不到图片",1).show();
Log.e("ERR",e.toString());;
}


}


});
}




}