一个图片满屏显示

private Bitmap CreatMatrixBitmap(int resourcesID, float screen_width,

   float screen_height) {//screen_width,screent_height是屏幕的宽和高，resourcesID是所要资源的图片id

Bitmap bitMap = null;

//代表那个背景图片

bitMap = BitmapFactory.decodeResource(getResources(), resourcesID);

//得到图片的宽和搞

int bitWidth = bitMap.getWidth();

int bitHeight = bitMap.getHeight();

float scaleWidth = screen_width/ (float) bitWidth;//屏幕的宽和高除以图片的宽和高

float scaleHeight = screen_height/ (float) bitHeight;

 

//图片处理

Matrix matrix = new Matrix();

matrix.postScale(scaleWidth, scaleHeight);

bitMap = Bitmap.createBitmap(bitMap, 0, 0, bitWidth, bitHeight, matrix,

true);

return bitMap;

    }