根据URL加载图片并付给bitmap(微信分享中使用)

原文网址: 

1. http://xiaxveliang.blog.163.com/blog/static/297080342013827768676/

2. http://kylines.iteye.com/blog/1660180

1、权限：

    1）联网权限

    2）图片存储到sdcard的权限

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

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

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

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

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

2、根据给定URL，下载网络图片：

public Bitmap downloadPic(Context context, String pUrl) {

URL url = null;

HttpURLConnection conn = null;

InputStream is = null;

ByteArrayOutputStream baos = null;

Bitmap bitmap = null;

String filePath = null;

try {

if (bitmap == null) {

url = new URL(pUrl);

conn = (HttpURLConnection) url.openConnection();

conn.setReadTimeout(15000);

conn.setConnectTimeout(15000);

conn.setDoInput(true);

conn.connect();

is = conn.getInputStream();

baos = new ByteArrayOutputStream();

byte[] buffer = new byte[1024];

int len = 0;

while ((len = is.read(buffer)) != -1) {

baos.write(buffer, 0, len);

}

byte[] pArray = baos.toByteArray();

bitmap = BitmapFactory

.decodeByteArray(pArray, 0, pArray.length);

}

} catch (FileNotFoundException e) {

e.printStackTrace();

if (bitmap != null) {

bitmap.recycle();

bitmap = null;

}

} catch (IOException e) {

e.printStackTrace();

if (bitmap != null) {

bitmap.recycle();

bitmap = null;

}

} catch (OutOfMemoryError e) {

e.printStackTrace();

if (bitmap != null) {

bitmap.recycle();

bitmap = null;

}

} catch (Exception e) {

e.printStackTrace();

if (bitmap != null) {

bitmap.recycle();

bitmap = null;

}

} finally {

if (conn != null) {

conn.disconnect();

}

if (baos != null) {

try {

baos.close();

} catch (IOException e) {

e.printStackTrace();

}

}

if (is != null) {

try {

is.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

return bitmap;

}