public static Bitmap revitionImageSize(String path) throws IOException {
BufferedInputStream in = new BufferedInputStream(new FileInputStream(new File(path)));
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeStream(in, null, options);
in.close();
// int i = 0;
Bitmap bitmap = null;
int wRatio = (int) Math.ceil(options.outWidth / (float) 720);
int hRatio = (int) Math.ceil(options.outHeight / (float) 1280);
if (wRatio > 1 && hRatio > 1) {
if (wRatio > hRatio) {
options.inSampleSize = wRatio;
} else {
options.inSampleSize = hRatio;
}
}
in = new BufferedInputStream(new FileInputStream(new File(path)));
options.inJustDecodeBounds = false;
// 杯具的老戳手机-1G以下的内存的某些手机无法加载高清图片大于1M以上,只能加大压缩力度
try{
bitmap = BitmapFactory.decodeStream(in, null, options);
}catch (Exception e) {
e.printStackTrace();
wRatio = (int) Math.ceil(options.outWidth / (float) 480);
hRatio = (int) Math.ceil(options.outHeight / (float) 800);
if (wRatio > 1 && hRatio > 1) {
if (wRatio > hRatio) {
options.inSampleSize = wRatio;
} else {
options.inSampleSize = hRatio;
}
}
in = new BufferedInputStream(new FileInputStream(new File(path)));
options.inJustDecodeBounds = false;
bitmap = BitmapFactory.decodeStream(in, null, options);
}
// while (true) {
// if ((options.outWidth >> i <= 1000)
// && (options.outHeight >> i <= 1000)) {
// in = new BufferedInputStream(
// new FileInputStream(new File(path)));
// options.inSampleSize = (int) Math.pow(2.0D, i);
// options.inJustDecodeBounds = false;
// bitmap = BitmapFactory.decodeStream(in, null, options);
// break;
// }
// i += 1;
// }
return bitmap;
}
******************************
然后图片以质量80来保存,这样的组合是最优之一
我从像素的1600*1400调到 480*640 , 然后质量从100到20都一 一的尝试过,最优之一的组合是 1280*720 , 质量80
******************************
public static String SDPATH = Environment.getExternalStorageDirectory()
+ "/tempMicroPet/";
public static void saveBitmap(Bitmap bm, String picName) {
//Log.e("", "保存图片");
try {
if (!isFileExist("")) {
File tempf = createSDDir("");
}
File f = new File(SDPATH, picName + ".JPEG");
if (f.exists()) {
f.delete();
}
FileOutputStream out = new FileOutputStream(f);
bm.compress(Bitmap.CompressFormat.JPEG, 80, out);
out.flush();
out.close();
//Log.e("", "已经保存");
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
注:以上代码来自Android-Lite群(47357508)的“就看Liter”同学的分享。