之前那樣做，發現圖片好模糊，加了一個壓縮圖片的，還有儲存圖片的方法如下：

大神的demo地址：http://blog.csdn.net/jdsjlzx/article/details/44160603#html
微信上傳圖片問題連結：http://blog.csdn.net/lmy0111ly/article/details/50586455#comments

1. 照相機以及返回結果

//照相機
    public void photo() {
        File file = new File(Environment.getExternalStorageDirectory(), "/shopping/cache/");
        if (!file.exists())
            file.mkdirs();
        filePath = Environment.getExternalStorageDirectory() + "/shopping/cache/";
        fileName = String.valueOf(System.currentTimeMillis() + ".png");

        Intent openCameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        openCameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(filePath, fileName)));
        startActivityForResult(openCameraIntent, TAKE_PICTURE);
    }

    //照相機返回的圖片
    protected void onActivityResult(int requestCode, int resultCode, final Intent data) {
        switch (requestCode) {
            case TAKE_PICTURE:
                if (Bimp.tempSelectBitmap.size() < 9 && resultCode == RESULT_OK) {
                    builder = new CustomDialogLoading.Builder(this, "正在處理圖片，請稍後...");
                    mDialog = builder.create();
                    mDialog.show();
                    Thread thread = new Thread(new Runnable() {
                        @Override
                        public void run() {
                            path = filePath + fileName;
                            Bitmap bm = FileUtils.convertToBitmap(path, 480, 800);//大小壓縮
                            String savePath = FileUtils.saveBitmap(bm, fileName);//質量壓縮並存儲
                            ImageItem takePhoto = new ImageItem();
                            takePhoto.setBitmap(bm);
                            takePhoto.setImagePath(savePath);
                            Bimp.tempSelectBitmap.add(takePhoto);
                            handler.sendEmptyMessage(0);
                        }
                    });
                    thread.start();
                }
                break;

        }
    }
 

2. 壓縮圖片及儲存圖片方法

public class FileUtils {

    /**
     * 根據路徑載入bitmap  將縮放後的bitmap返回去
     *
     * @param path 路徑
     * @param w    寬
     * @param h    長
     * @return
     */
    public static  Bitmap convertToBitmap(String path, int w, int h) {
        try {
            BitmapFactory.Options opts = new BitmapFactory.Options();
            // 設定為ture只獲取圖片大小
            opts.inJustDecodeBounds = true;
            opts.inPreferredConfig = Bitmap.Config.ARGB_8888;
            // 返回為空
            BitmapFactory.decodeFile(path, opts);
            int width = opts.outWidth;
            int height = opts.outHeight;
            float scaleWidth = 0.f, scaleHeight = 0.f;
            if (width > w || height > h) {//如果寬度大於 傳入的寬度  或者 高度大於 傳入的高度大於
                // 縮放
                scaleWidth = ((float) width) / w;
                scaleHeight = ((float) height) / h;
            }
            opts.inJustDecodeBounds = false;
            //縮放後的高度和寬度取最大值
            float scale = Math.max(scaleWidth, scaleHeight);
            opts.inSampleSize = (int) scale;//此處是最後的寬高值
//            //WeakReference 弱引用
//            WeakReference<Bitmap> weak = new WeakReference<Bitmap>actory.decodeFile(path, opts));
//            Bitmap bMapRotate = Bitmap.createBitmap(weak.get(BitmapF(), 0, 0, weak.get().getWidth(), weak.get().getHeight(), null, true);
            Bitmap bMapRotate = BitmapFactory.decodeFile(path, opts);
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            bMapRotate.compress(Bitmap.CompressFormat.JPEG, 50, baos);
            ByteArrayInputStream bais=new ByteArrayInputStream(baos.toByteArray());
            Bitmap bitmap = BitmapFactory.decodeStream(bais);
            System.out.println("質量 壓縮---------------width-" + bMapRotate.getWidth() + "---height--" + bMapRotate.getHeight()+"------------------size---"+bMapRotate.getRowBytes());
            if (bMapRotate != null) {
                return bMapRotate;
            }
            return null;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
/**
     * 儲存圖片，返回路徑
     * @param bm
     * @param picName
     * @return
     */
    public static String saveBitmap(Bitmap bm, String picName) {
        try {
            if (!isFileExist(picName)) {
                File tempf = createSDDir("");
            }
            File f = new File(SDPATH, picName);

            if (f.exists()) {
                f.delete();

            }
            FileOutputStream out = new FileOutputStream(f);
            bm.compress(Bitmap.CompressFormat.PNG, 70, out);
            out.flush();
            out.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return SDPATH + picName;
    }
}