表单中上传文件、压缩上传图片

表单上传文件，详见代码：

public boolean edit(String url, List<NameValuePair> params) { //name是字段名，value是文件地址

HttpClient httpClient = new DefaultHttpClient();

HttpContext localContext = new BasicHttpContext();

HttpPut httpPut = new HttpPut(url);

try {

MultipartEntity entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);

for (int index = 0; index < params.size(); index++) {

if (params.get(index).getName()

.equalsIgnoreCase("image")) {

entity.addPart(params.get(index).getName(),

new FileBody(ImageUtils.zoomToFix(params.get(index).getValue(), 200))); //zoomToFix是自己封装的压缩上传图片的方法，具体见下文

} else {

entity.addPart(

params.get(index).getName(),

new StringBody(params.get(index).getValue(), Charset.forName("UTF-8")));

}

}

httpPut.setEntity(entity);

HttpResponse response = httpClient.execute(httpPut, localContext);

ReturnMsg<User> msg = getReturnMsg(response.getEntity().getContent());

if(msg != null && msg.getRespCode() == ReturnCode.SUCCESS) {

return true;

}

} catch (IOException e) {

e.printStackTrace();

}

return false;

}

压缩上传图片：

private static BitmapFactory.Options options = new BitmapFactory.Options();

/**

* 压缩图片为固定高度

* @param filePath 图片地址

* @param h 指定高度

* @return

*/

public static File zoomToFix(String filePath, int h) {

File file = new File(filePath);

try {

options.inJustDecodeBounds = true; // 先设置预读图片，既只读取大小信息

Bitmap bitmap = BitmapFactory.decodeFile(filePath, options);

options.inJustDecodeBounds = false; // 读出大小信息后改为非预读

int be = options.outWidth/h; // 计算缩放倍数

if(be <= 0) be = 1;

options.inSampleSize = be; // 设置缩放，可惜只能是整数

bitmap = BitmapFactory.decodeFile(filePath, options); // 根据缩放比实际读取图片

FileOutputStream fos = new FileOutputStream(file); // 保存图片文件

bitmap.compress(Bitmap.CompressFormat.PNG, 100, fos);

} catch (FileNotFoundException e) {

Log.e("ImageUtils", e.getMessage(), e);

}

return file;

}