http://blog.csdn.net/z104207/article/details/6634774
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package com.bingo.util;
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import java.io.BufferedOutputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.graphics.Matrix;
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public class ImageDispose {
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public static byte[] readStream(InputStream inStream) throws Exception {
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byte[] buffer = new byte[1024];
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int len = -1;
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ByteArrayOutputStream outStream = new ByteArrayOutputStream();
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while ((len = inStream.read(buffer)) != -1) {
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outStream.write(buffer, 0, len);
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}
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byte[] data = outStream.toByteArray();
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outStream.close();
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inStream.close();
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return data;
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}
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public static Bitmap getPicFromBytes(byte[] bytes,
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BitmapFactory.Options opts) {
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if (bytes != null)
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if (opts != null)
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return BitmapFactory.decodeByteArray(bytes, 0, bytes.length,
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opts);
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else
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return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
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return null;
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}
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public static Bitmap zoomBitmap(Bitmap bitmap, int w, int h){
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int width = bitmap.getWidth();
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int height = bitmap.getHeight();
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Matrix matrix = new Matrix();
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float scaleWidth = ((float) w / width);
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float scaleHeight = ((float) h / height);
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matrix.postScale(scaleWidth, scaleHeight);
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Bitmap newBmp = Bitmap.createBitmap(bitmap, 0, 0, width, height,
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matrix, true);
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return newBmp;
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}
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public static byte[] Bitmap2Bytes(Bitmap bm){
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
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return baos.toByteArray();
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}
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public static File getFileFromBytes(byte[] b, String outputFile) {
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BufferedOutputStream stream = null;
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File file = null;
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try {
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file = new File(outputFile);
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FileOutputStream fstream = new FileOutputStream(file);
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stream = new BufferedOutputStream(fstream);
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stream.write(b);
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} catch (Exception e) {
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e.printStackTrace();
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} finally {
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if (stream != null) {
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try {
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stream.close();
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} catch (IOException e1) {
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e1.printStackTrace();
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}
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}
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}
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return file;
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}
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}
