一、bitmap保存到SQLite 中 數據格式: express
- db.execSQL("Create table express ( _id INTEGER PRIMARY KEY AUTOINCREMENT,express_no varchar(100),express_name TEXT,express_img BLOB );");
二、bitmap 變爲 Blob 緩存
- ContentValues values = new ContentValues();
- Bitmap bmp=BitmapFactory.decodeResource(getResources(), R.drawable.erweima);
- final ByteArrayOutputStream os = new ByteArrayOutputStream();
- bmp.compress(Bitmap.CompressFormat.PNG, 100, os);
- values.put("express_img", os.toByteArray());
- values.put("express_name","zf");
- values.put("express_no","zf");
- getContentResolver().insert("express", values);
三、從SQLite中讀取Bitmap spa
- byte[] in=cur.getBlob(cur.getColumnIndex("express_img"));
- bmpout=BitmapFactory.decodeByteArray(in,0,in.length);
顯示在ImageView上code
- ImageView imageView = (ImageView) view.findViewById(R.id.img);
- ByteArrayInputStream stream = new ByteArrayInputStream(cur.getBlob(cur.getColumnIndex("express_img")));
- imageView.setImageDrawable(Drawable.createFromStream(stream, "img"));
總結:orm
inputStream: 做爲數據緩存,數據寫如何供別的對象讀取,其方法爲read();對象
outputStream:做爲數據緩存,未來向別的對象寫內容!其方法write();get
- byte[] in=cur.getBlob(cur.getColumnIndex(MyUser.User.BITMAP_VALUES));
//這樣也能夠對數據進行初始化,byte是基本類型,不須要以前進行長度定義。input