android 点击一个按钮，选择一张图片，获取路径，然后显示在屏幕

// 请在点击事件中调用此函数int REQUEST_CODE_SELECT_PIC = 120;private void selectPicture() {        Intent intent = new Intent();        intent.setAction(Intent.ACTION_PICK);        intent.setType("image/*");        // 这个函数会自动调用下面的函数        startActivityForResult(intent, REQUEST_CODE_SELECT_PIC);    }protected void onActivityResult(int requestCode, int resultCode, Intent data) {        if (requestCode == REQUEST_CODE_SELECT_PIC) {            // 获取选择的图片            Uri selectedImage = data.getData();            int width = 0;            int height = 0;            String[] filePathColumn = { MediaStore.Images.Media.DATA };            Cursor cursor = getContentResolver().query(selectedImage, null,                    null, null, null);            cursor.moveToFirst();            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);            // 获取到图片的路径            String selectedImagePath = cursor.getString(columnIndex);            Log.e("zhangxin selectedImagePath", selectedImagePath);            // 调取底层处理            //DealImage(selectedImagePath);            // 解码该路径的图片，得到bitmap 图片            bm = BitmapFactory.decodeFile(mRootResult + "result.bmp");            width = bm.getWidth();            height = bm.getHeight();            {                // 字符串的操作                int satrt = selectedImagePath.toString().lastIndexOf("/");                int end = selectedImagePath.toString().lastIndexOf(".");                // 文件路径 ; 文件全路径+名字                ImagePath = selectedImagePath.toString().substring(0, satrt);                Log.e("zhang ImagePath", ImagePath);            }            if (selectedImage != null) {                //将图片显示到ImageView中                mImageView.setImageBitmap(bm);            }        }        super.onActivityResult(requestCode, resultCode, data);    }    [你可以直接下载一个jni 通过点击图片，底层处理完，然后显示在屏幕]   http://download.csdn.net/detail/baidu_31872269/9768004