Android camera ensures that images are not distorted and compressed

Today on the Internet to find a reference to the picture to compress to kb

Others do not want to say more, directly on the code

Call the following code after taking a photo

Bitmaputils.compressbitmap (Photopath, Photopath, 640); Compression

This is a tool class.

Package Com.continuouscamera;import Java.io.bytearrayoutputstream;import Java.io.file;import Java.io.filenotfoundexception;import Java.io.fileoutputstream;import Java.io.ioexception;import Android.app.activity;import Android.database.cursor;import Android.graphics.bitmap;import Android.graphics.bitmapfactory;import Android.net.uri;import android.provider.mediastore.mediacolumns;/** * Tools For handler picture */public final class Bitmaputils {private static final String TAG = BitmapUtils.class.getSimpleNam    E (); public static void Compressbitmap (String sourcepath, String targetpath, float maxSize) {bitmapfactory.options Opti        ONS = new Bitmapfactory.options ();        Options.injustdecodebounds = true;        Bitmapfactory.decodefile (SourcePath, Options);        Final float originalwidth = options.outwidth;        Final float originalheight = options.outheight;        float Convertedwidth;        float Convertedheight;          if (OriginalWidth > OriginalHeight) {  Convertedwidth = maxSize;        Convertedheight = Maxsize/originalwidth * originalheight;            } else {convertedheight = maxSize;        Convertedwidth = Maxsize/originalheight * originalwidth;        } final float ratio = originalwidth/convertedwidth;        options.insamplesize = (int) ratio;        Options.injustdecodebounds = false;        Bitmap Convertedbitmap = Bitmapfactory.decodefile (SourcePath, Options);        Bytearrayoutputstream Bytearrayoutputstream = new Bytearrayoutputstream ();        Convertedbitmap.compress (Bitmap.CompressFormat.JPEG, Bytearrayoutputstream);        FileOutputStream FileOutputStream;            try {fileoutputstream = new FileOutputStream (new File (TargetPath));            Fileoutputstream.write (Bytearrayoutputstream.tobytearray ());            Fileoutputstream.flush ();        Fileoutputstream.close ();        } catch (FileNotFoundException e) {e.printstacktrace (); } catch (Ioexception e) {e.printstacktrace ();        }}/** * get picture physical path based on URI */public static String Getabsoluteimagepath (URI Uri, activity activity) {        String[] proj = {Mediacolumns.data};        cursor cursor = activity.managedquery (URI, proj, NULL, NULL, NULL);        int column_index = Cursor.getcolumnindexorthrow (Mediacolumns.data);        Cursor.movetofirst ();    Return cursor.getstring (Column_index); }/** * * @param path * @param maxSize * @return */public static BITMAP Decodebitmap (String Pat        h, int maxSize) {bitmapfactory.options Options = new Bitmapfactory.options ();        Options.injustdecodebounds = true;        Bitmapfactory.decodefile (path, options);        Final int originalwidth = Options.outwidth;        Final int originalheight = options.outheight;        int convertedwidth;        int convertedheight;  if (OriginalWidth > OriginalHeight) {convertedwidth = maxSize;          Convertedheight = Maxsize/originalwidth * originalheight;            } else {convertedheight = maxSize;        Convertedwidth = Maxsize/originalheight * originalwidth;        } options = new Bitmapfactory.options ();        Options.injustdecodebounds = false;        Options.insamplesize = computesamplesize (options, MaxSize, Convertedwidth * convertedheight);        Bitmap convertedbitmap = bitmapfactory.decodefile (path, options);            if (convertedbitmap! = null) {final int realwidth = Convertedbitmap.getwidth ();        Final int realheight = Convertedbitmap.getheight ();    } return Convertedbitmap;  }/** * * @param path * @param maxWidth * @param maxheight * @return * * public static Bitmap Decodebitmap (String path, int maxWidth, int maxheight) {bitmapfactory.options Options = new Bitmapfactory.options        ();        Options.injustdecodebounds = true; Bitmapfactory.decodefile (Path, Options);        Final int originalwidth = Options.outwidth;        Final int originalheight = options.outheight;        options = new Bitmapfactory.options ();        Options.injustdecodebounds = false;        Options.insamplesize = computesamplesize (options, MaxWidth, MaxWidth * maxheight);        Bitmap convertedbitmap = bitmapfactory.decodefile (path, options);            if (convertedbitmap! = null) {final int realwidth = Convertedbitmap.getwidth ();        Final int realheight = Convertedbitmap.getheight ();    } return Convertedbitmap;        } private static int computeinitialsamplesize (bitmapfactory.options Options, int minsidelength, int maxnumofpixels) {        Double w = options.outwidth;        Double h = options.outheight; int lowerbound = (Maxnumofpixels = =-1)?        1: (int) Math.ceil (math.sqrt (w * h/maxnumofpixels)); int upperbound = (Minsidelength = =-1)? Minsidelength: (int) math.min (Math.floor (w/minsidelength), MATH.FLoor (h/minsidelength));        if (Upperbound < lowerbound) {return lowerbound;        } if ((Maxnumofpixels = =-1) && (minsidelength = =-1)) {return 1;        } else if (minsidelength = =-1) {return lowerbound;        } else {return upperbound;        }} private static int computesamplesize (bitmapfactory.options Options, int minsidelength, int maxnumofpixels) {        int initialsize = computeinitialsamplesize (options, Minsidelength, maxnumofpixels);        int roundedsize;            if (initialsize <= 8) {roundedsize = 1;            while (Roundedsize < initialsize) {roundedsize <<= 1;        }} else {roundedsize = (initialsize + 7)/8 * 8;    } return roundedsize; }/** * Generates a 8-bit 16-binary cache factor: 8-bit hash code for the rule, less than 0 * @param string * @return */public static string Toregularhas Hcode (String string) {final String HEXHASHCOde = integer.tohexstring (String.hashcode ());        Final StringBuilder StringBuilder = new StringBuilder (Hexhashcode);        while (Stringbuilder.length () < 8) {Stringbuilder.insert (0, ' 0 ');    } return stringbuilder.tostring (); }}

　　

Android camera ensures that images are not distorted and compressed