bitmap轉String:
Bitmap
bmp =
new
Bitmap(
@"d:\a.jpg"
);
System.IO.MemoryStream
ms =
new
System.IO.MemoryStream();
bmp.Save(ms,
bmp.RawFormat);
string
字符串
= System.Convert.ToBase64String(ms.ToArray());
string轉bitmap:
String url = b.getString("string");
Bitmap bitmap = BitmapFactory.decodeFile(url);
bitmap轉byte數組:
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
byte數組轉bitmap:
Bitmap
bitmap = BitmapFactory.decodeByteArray(bitmapdata, 0,
bitmapdata.length);
String轉int:
1). int i = Integer.parseInt([String]); 或 i = Integer.parseInt([String],[int radix]);
2). int i = Integer.valueOf(my_str).intValue();
注: 字串轉成 Double, Float, Long 的方法大同小異.
int轉String:
1.) String s = String.valueOf(i);
2.) String s = Integer.toString(i);
3.) String s = "" + i;
注: Double, Float, Long 轉成字串的方法大同小異.
各種數字類型轉換成字符串型:
String s = String.valueOf( value); // 其中 value 爲任意一種數字類型。
字符串型轉換成各種數字類型:
String s = "169";
byte b = Byte.parseByte( s );
short t = Short.parseShort( s );
int i = Integer.parseInt( s );
long l = Long.parseLong( s );
Float f = Float.parseFloat( s );
Double d = Double.parseDouble( s );
數字類型與數字類對象之間的轉換:
byte b = 169;
Byte bo = new Byte( b );
b = bo.byteValue();
short t = 169;
Short to = new Short( t );
t = to.shortValue();
int i = 169;
Integer io = new Integer( i );
i = io.intValue();
long l = 169;
Long lo = new Long( l );
l = lo.longValue();
float f = 169f;
Float fo = new Float( f );
f = fo.floatValue();
double d = 169f;
Double dObj = new Double( d );
d = dObj.doubleValue();