我想保存在我的代码来调整图像大小，但我不能找到它在谷歌任何东西。 请问你能帮帮我吗 ？
这是（从Android电子文档）的代码：
private void galleryAddPic() {
Intent mediaScanIntent = new Intent("android.intent.action.MEDIA_SCANNER_SCAN_FILE");
File f = new File(mCurrentPhotoPath);
picturePathForUpload = mCurrentPhotoPath;
Uri contentUri = Uri.fromFile(f);
mediaScanIntent.setData(contentUri);
this.sendBroadcast(mediaScanIntent);
}
在那之后，我必须把它上传到服务器。
非常感谢。
您可以保存下面的代码位图图像
Bitmap photo = (Bitmap) "your Bitmap image";
photo = Bitmap.createScaledBitmap(photo, 100, 100, false);
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.JPEG, 40, bytes);
File f = new File(Environment.getExternalStorageDirectory()
+ File.separator + "Imagename.jpg");
f.createNewFile();
FileOutputStream fo = new FileOutputStream(f);
fo.write(bytes.toByteArray());
fo.close();
阅读其他的答案，并没有找到正是我想要的之后，这是我在获得适当规模的位图方案。 这是Prabu的回答的适应。
它可以确保您的图片在不变形的照片尺寸的缩放方式：
public saveScaledPhotoToFile() {
//Convert your photo to a bitmap
Bitmap photoBm = (Bitmap) "your Bitmap image";
//get its orginal dimensions
int bmOriginalWidth = photoBm.getWidth();
int bmOriginalHeight = photoBm.getHeight();
double originalWidthToHeightRatio = 1.0 * bmOriginalWidth / bmOriginalHeight;
double originalHeightToWidthRatio = 1.0 * bmOriginalHeight / bmOriginalWidth;
//choose a maximum height
int maxHeight = 1024;
//choose a max width
int maxWidth = 1024;
//call the method to get the scaled bitmap
photoBm = getScaledBitmap(photoBm, bmOriginalWidth, bmOriginalHeight,
originalWidthToHeightRatio, originalHeightToWidthRatio,
maxHeight, maxWidth);
/**********THE REST OF THIS IS FROM Prabu's answer*******/
//create a byte array output stream to hold the photo's bytes
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
//compress the photo's bytes into the byte array output stream
photoBm.compress(Bitmap.CompressFormat.JPEG, 40, bytes);
//construct a File object to save the scaled file to
File f = new File(Environment.getExternalStorageDirectory()
+ File.separator + "Imagename.jpg");
//create the file
f.createNewFile();
//create an FileOutputStream on the created file
FileOutputStream fo = new FileOutputStream(f);
//write the photo's bytes to the file
fo.write(bytes.toByteArray());
//finish by closing the FileOutputStream
fo.close();
}
private static Bitmap getScaledBitmap(Bitmap bm, int bmOriginalWidth, int bmOriginalHeight, double originalWidthToHeightRatio, double originalHeightToWidthRatio, int maxHeight, int maxWidth) {
if(bmOriginalWidth > maxWidth || bmOriginalHeight > maxHeight) {
Log.v(TAG, format("RESIZING bitmap FROM %sx%s ", bmOriginalWidth, bmOriginalHeight));
if(bmOriginalWidth > bmOriginalHeight) {
bm = scaleDeminsFromWidth(bm, maxWidth, bmOriginalHeight, originalHeightToWidthRatio);
} else {
bm = scaleDeminsFromHeight(bm, maxHeight, bmOriginalHeight, originalWidthToHeightRatio);
}
Log.v(TAG, format("RESIZED bitmap TO %sx%s ", bm.getWidth(), bm.getHeight()));
}
return bm;
}
private static Bitmap scaleDeminsFromHeight(Bitmap bm, int maxHeight, int bmOriginalHeight, double originalWidthToHeightRatio) {
int newHeight = (int) Math.min(maxHeight, bmOriginalHeight * .55);
int newWidth = (int) (newHeight * originalWidthToHeightRatio);
bm = Bitmap.createScaledBitmap(bm, newWidth, newHeight, true);
return bm;
}
private static Bitmap scaleDeminsFromWidth(Bitmap bm, int maxWidth, int bmOriginalWidth, double originalHeightToWidthRatio) {
//scale the width
int newWidth = (int) Math.min(maxWidth, bmOriginalWidth * .75);
int newHeight = (int) (newWidth * originalHeightToWidthRatio);
bm = Bitmap.createScaledBitmap(bm, newWidth, newHeight, true);
return bm;
}
这里是我的GitHub要点的相应链接： https://gist.github.com/Lwdthe1/2d1cd0a12f30c18db698
首先将您的图像转换为位图，然后使用此代码：
Bitmap yourBitmap;
Bitmap resized = Bitmap.createScaledBitmap(yourBitmap, newWidth, newHeight, true);
看到这个将有助于充分。 一般来说，如果你是通过相机中使用的意图拍摄图像时，您将得到uri图像作为结果你读它的规模缩小图像，并将其存储在同一个地方
如果你想捕捉一个全尺寸的图像，那么你别无选择，只能将其保存到SD购物车，然后改变图像的大小。
然而，如果缩略图就足够了，然后就没有必要将它保存到SD卡上，您可以从返回的意图的额外提取出来。
你可以看一下这个指南我写的采取使用相机构建图像两种方法Activity ：
指南：安卓：为缩略图和全尺寸图像使用相机的活动
BitmapFactory.Options optionsSignature = new BitmapFactory.Options();
final Bitmap bitmapSignature = BitmapFactory.decodeFile(
fileUriSignature.getPath(), optionsSignature);
Bitmap resizedSignature = Bitmap.createScaledBitmap(
bitmapSignature, 256, 128, true);
signature.setImageBitmap(resizedSignature);
