在android中,如何通过编程将我的图片大小从70 kb减小到30 kb? [英] In android how can i reduce my image size from 70 kb to 30 kb programatically?
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问题描述
我正在用android开发一个应用程序,该应用程序将捕获照片并将其存储在sqlite中.图像大小为70 kb,但我想以35 kb的大小存储该图像.但是我对此一无所知.我尝试了以下代码,但没有成功.
I am developing an app in android that will capture a photo and store in sqlite. The image size is 70 kb but i want to store that image with 35 kb size. But i can't get any idea for this. I tried the following code but without success.
int photo_width = bm.getWidth();
int photo_height = bm.getHeight();
photo_width = 260;
photo_height = 260;
Bitmap photobitmap = Bitmap.createScaledBitmap(bm,
photo_width, photo_height, false);
推荐答案
使用此选项:
public Bitmap getResizedBitmap(Bitmap bm, int newHeight, int newWidth) {
int width = bm.getWidth();
int height = bm.getHeight();
float scaleWidth = ((float) newWidth) / width;
float scaleHeight = ((float) newHeight) / height;
Matrix matrix = new Matrix();
matrix.postScale(scaleWidth, scaleHeight);
Bitmap resizedBitmap = Bitmap.createBitmap(bm, 0, 0, width, height,
matrix, false);
return resizedBitmap;
}
您可以使用这一个...这是最好的例子.....
you can use this one...This is the Best Example.....
private Bitmap decodeFile(File f){
try {
//Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(new FileInputStream(f),null,o);
//The new size we want to scale to
final int REQUIRED_SIZE=70;
//Find the correct scale value. It should be the power of 2.
int scale=1;
while(o.outWidth/scale/2>=REQUIRED_SIZE && o.outHeight/scale/2>=REQUIRED_SIZE)
scale*=2;
//Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize=scale;
return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
} catch (FileNotFoundException e) {}
return null;
}
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