旋转图片并保存

点击旋转控件实现图片的旋转及预览，点击保存控件将旋转后的图片存储起来

int current=0.0f;

Bitmap bigimage=compressImageFromFile(图片所在路径);

imageFiler为显示图片的控件ImageView

String strPath = Environment.getExternalStorageDirectory().getPath() + "/微途/" + System.currentTimeMillis() + ".jpg"; 

 

旋转控件的点击事件中：

   current=current+90f;
   Bitmap  bm =rotaingImageView((int)current,bigimage);
   imageFiler .setImageBitmap(bm);

 

保存控件的点击事件中：

saveImage();

 

 

/**
	 * 
	 * 压缩图片
	 * 
	 * @param srcPath
	 * @return
	 */
	public Bitmap compressImageFromFile(String srcPath) {
		BitmapFactory.Options newOpts = new BitmapFactory.Options();
		newOpts.inJustDecodeBounds = true;// 只读边,不读内容
		Bitmap bitmap = BitmapFactory.decodeFile(srcPath, newOpts);

		newOpts.inJustDecodeBounds = false;
		int w = newOpts.outWidth;
		int h = newOpts.outHeight;
		float hh = 800f;//
		float ww = 480f;//
		int be = 1;
		if (w > h && w > ww) {
			be = (int) (newOpts.outWidth / ww);
		} else if (w < h && h > hh) {
			be = (int) (newOpts.outHeight / hh);
		}
		if (be <= 0)
			be = 1;
		newOpts.inSampleSize = be;// 设置采样率

		newOpts.inPreferredConfig = Config.ARGB_8888;// 该模式是默认的,可不设
		newOpts.inPurgeable = true;// 同时设置才会有效
		newOpts.inInputShareable = true;// 。当系统内存不够时候图片自动被回收

		bitmap = BitmapFactory.decodeFile(srcPath, newOpts);
		// return compressBmpFromBmp(bitmap);//原来的方法调用了这个方法企图进行二次压缩
		// 其实是无效的,大家尽管尝试
		return bitmap;
	}

 

//旋转图片
public Bitmap rotaingImageView(int angle , Bitmap bitmap) {  
	       //旋转图片 动作   
	       Matrix matrix = new Matrix();
	       matrix.postRotate(angle);
	       // 创建新的图片   
	       return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);  
	   }

 

/**
	 * 保存图片
	 */
	private void saveImage() {
	
		Bitmap bitmap =  ((BitmapDrawable)imageFiler.getDrawable()).getBitmap();
		try {
			saveBitmapToFile(bitmap,strPath);
			
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}	

		this.finish();
	}

 

public  void saveBitmapToFile(Bitmap bitmap, String _file)
            throws IOException {
        BufferedOutputStream os = null;
        
        try {
            File file = new File(_file);
            // String _filePath_file.replace(File.separatorChar +
            // file.getName(), "");
            int end = _file.lastIndexOf(File.separator);
            String _filePath = _file.substring(0, end);
            File filePath = new File(_filePath);
            if (!filePath.exists()) {
                filePath.mkdirs();
            }
            file.createNewFile();
            os = new BufferedOutputStream(new FileOutputStream(file));
            bitmap.compress(Bitmap.CompressFormat.JPEG, 100, os);
               		       

           } finally {
            if (os != null) {
                try {
                    os.close();
                } catch (IOException e) {
                    Log.e("保存失败", e.getMessage(), e);
                }
            }
        }
    }