本文实例讲述了android图片类型之间相互转换实现代码。分享给大家供大家参考。具体如下:
android在处理一写图片资源的时候,会进行一些类型的转换,现在有空整理一下:
1、Drawable → Bitmap
Java代码如下:
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public static Bitmap drawableToBitmap(Drawable drawable) {
Bitmap bitmap = Bitmap
.createBitmap(
drawable.getIntrinsicWidth(),
drawable.getIntrinsicHeight(),
drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
: Bitmap.Config.RGB_565);
Canvas canvas = new Canvas(bitmap);
//canvas.setBitmap(bitmap);
drawable.setBounds( 0 , 0 , drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
drawable.draw(canvas);
return bitmap;
}
public static Bitmap drawableToBitmap(Drawable drawable) {
Bitmap bitmap = Bitmap
.createBitmap(
drawable.getIntrinsicWidth(),
drawable.getIntrinsicHeight(),
drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
: Bitmap.Config.RGB_565);
Canvas canvas = new Canvas(bitmap);
//canvas.setBitmap(bitmap);
drawable.setBounds( 0 , 0 , drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
drawable.draw(canvas);
return bitmap;
}
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2、从资源中获取Bitmap
Java代码如下:
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Resources res=getResources();
Bitmap bmp=BitmapFactory.decodeResource(res, R.drawable.pic);
Resources res=getResources();
Bitmap bmp=BitmapFactory.decodeResource(res, R.drawable.pic);
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3、Bitmap → byte[]
Java代码如下:
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private byte [] Bitmap2Bytes(Bitmap bm){
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, 100 , baos);
return baos.toByteArray();
}
private byte [] Bitmap2Bytes(Bitmap bm){
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, 100 , baos);
return baos.toByteArray();
}
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4、 byte[] → Bitmap
Java代码如下:
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private Bitmap Bytes2Bimap( byte [] b){
if (b.length!= 0 ){
return BitmapFactory.decodeByteArray(b, 0 , b.length);
}
else {
return null ;
}
}
private Bitmap Bytes2Bimap( byte [] b){
if (b.length!= 0 ){
return BitmapFactory.decodeByteArray(b, 0 , b.length);
}
else {
return null ;
}
}
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以上是我在实践中遇到的一些转换,以后遇到类似的就不用到处找了。
希望本文所述对大家的Android程序设计有所帮助。