如何以编程COM preSS图片 [英] How to compress images programatically
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问题描述
我有30至40的图像在我的资源文件夹。而我目前使用DrawBitpMap()来绘制它在我的屏幕上。但它给我一个错误VM outOfMemeory错误。于是,我试着调整图像。现在我的图像分辨率为160x160的。现在,我没有得到这个错误。它运行没有任何问题。所以我的问题是, 反正我有可能COM preSS我的图片编程,而不是手动调整的图像资源?
I have 30 to 40 images in my resource folder. And I am currently using DrawBitpMap() to draw it in my screen. But It gives me an error "VM outOfMemeory error". So I tried to resize the images. Now my image resolution is 160x160. Now I dont get that error. it runs without any problem. So my question is, Is there anyway I could compress my images programatically instead of manually resizing the images in resources?
任何帮助是AP preciated ..
Any help is appreciated..
推荐答案
试试用这个例子
public class bitmaptest extends Activity {
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
LinearLayout linLayout = new LinearLayout(this);
// load the origial BitMap (500 x 500 px)
Bitmap bitmapOrg = BitmapFactory.decodeResource(getResources(),
R.drawable.android);
int width = bitmapOrg.width();
int height = bitmapOrg.height();
int newWidth = 200;
int newHeight = 200;
// calculate the scale - in this case = 0.4f
float scaleWidth = ((float) newWidth) / width;
float scaleHeight = ((float) newHeight) / height;
// createa matrix for the manipulation
Matrix matrix = new Matrix();
// resize the bit map
matrix.postScale(scaleWidth, scaleHeight);
// rotate the Bitmap
matrix.postRotate(45);
// recreate the new Bitmap
Bitmap resizedBitmap = Bitmap.createBitmap(bitmapOrg, 0, 0,
width, height, matrix, true);
// make a Drawable from Bitmap to allow to set the BitMap
// to the ImageView, ImageButton or what ever
BitmapDrawable bmd = new BitmapDrawable(resizedBitmap);
ImageView imageView = new ImageView(this);
// set the Drawable on the ImageView
imageView.setImageDrawable(bmd);
// center the Image
imageView.setScaleType(ScaleType.CENTER);
// add ImageView to the Layout
linLayout.addView(imageView,
new LinearLayout.LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT
)
);
// set LinearLayout as ContentView
setContentView(linLayout);
}
}
您也可以做
Bitmap.createScaledBitmap(yourimage, 160, 160, true);
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