我上传了一个从图库中选择的图片的应用程序。 在上传之前，我在ImageView中显示所选图像，让用户选择另一个图像或上传当前图像。 如果widht或height大于1000，我会缩小图像，但我只能在ImageView中缩放位图。 任何人都可以帮助我或给我任何建议吗？ 这是我的代码，非常感谢任何帮助，提前谢谢。
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1 && resultCode == RESULT_OK) {
//Bitmap photo = (Bitmap) data.getData().getPath();
//Uri imagename=data.getData();
Uri selectedImageUri = data.getData();
imagepath = getPath(selectedImageUri);
Bitmap bitmap=BitmapFactory.decodeFile(imagepath);
int width = bitmap.getWidth();
int height = bitmap.getHeight();
if(width>=1000 || height >= 1000){
width = width/3;
height = height/3;
bitmap = Bitmap.createScaledBitmap(bitmap, width, height, false);
}
imageview.setImageBitmap(bitmap);
uploadButton.setVisibility(View.VISIBLE);
}
}
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
public int uploadFile(String sourceFileUri) {
int day, month, year;
int second, minute, hour;
GregorianCalendar date = new GregorianCalendar();
day = date.get(Calendar.DAY_OF_MONTH);
month = date.get(Calendar.MONTH);
year = date.get(Calendar.YEAR);
second = date.get(Calendar.SECOND);
minute = date.get(Calendar.MINUTE);
hour = date.get(Calendar.HOUR);
String name=(hour+""+minute+""+second+""+day+""+(month+1)+""+year);
String tag=name+".jpg";
String fileName = sourceFileUri.replace(sourceFileUri,tag);
HttpURLConnection conn = null;
DataOutputStream dos = null;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024 * 1024;
File sourceFile = new File(sourceFileUri);
if (!sourceFile.isFile()) {
dialog.dismiss();
Log.e("uploadFile", "Source File not exist :"+imagepath);
runOnUiThread(new Runnable() {
public void run() {
messageText.setText("Source File not exist :"+ imagepath);
}
});
return 0;
}
else
{
try {
// open a URL connection to the Servlet
FileInputStream fileInputStream = new FileInputStream(sourceFile);
URL url = new URL(upLoadServerUri);
conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("ENCTYPE", "multipart/form-data");
conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
conn.setRequestProperty("uploaded_file", fileName);
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename=\""
+ fileName + "\"" + lineEnd);
dos.writeBytes(lineEnd);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0) {
dos.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
serverResponseCode = conn.getResponseCode();
String serverResponseMessage = conn.getResponseMessage();
Log.i("uploadFile", "HTTP Response is : "
+ serverResponseMessage + ": " + serverResponseCode);
if(serverResponseCode == 200){
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(UploadImage.this, getString(R.string.uploadone), Toast.LENGTH_SHORT).show();
}
});
Intent intent = new Intent(UploadImage.this, ProfileActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
finish();
}
//close the streams //
fileInputStream.close();
dos.flush();
dos.close();
} catch (MalformedURLException ex) {
dialog.dismiss();
ex.printStackTrace();
runOnUiThread(new Runnable() {
public void run() {
//messageText.setText("MalformedURLException Exception : check script url.");
Toast.makeText(UploadImage.this, getString(R.string.errorupload), Toast.LENGTH_LONG).show();
}
});
Log.e("Upload file to server", "error: " + ex.getMessage(), ex);
} catch (Exception e) {
dialog.dismiss();
e.printStackTrace();
runOnUiThread(new Runnable() {
public void run() {
//messageText.setText("Got Exception : see logcat ");
Toast.makeText(UploadImage.this, getString(R.string.errorupload), Toast.LENGTH_SHORT).show();
}
});
Log.e("Upload file to server", "Exception : " + e.getMessage(), e);
}
dialog.dismiss();
return serverResponseCode;
}
答案 0 :(得分：0)
您可以使用Bitmap类中的一种静态方法将图像解码为BitmapFactory，无论是使用您正在打开的现有FileInputStream还是只是传入文件路径。
然后，您可以使用createScaledBitmap方法调整其大小，最后使用compress将其放入OutputStream。