TextView 한글의 Bold 처리

text.setText("한글 볼드 테스트"); 
text.setPaintFlags(text.getPaintFlags() | Paint.FAKE_BOLD_TEXT_FLAG);

스크롤바 없애기

android:scrollbars="@null"

단말의 DIP, WIDTH, HEIGHT 값 구하기

DisplayMetrics displaymetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);

density = displaymetrics.densityDpi;
width = displaymetrics.widthPixels;
height = displaymetrics.heightPixels;

Bitmap <--> Drawable

[Bitmap to Drawable]
BitmapDrawable bitmapDrawable = (BitmapDrawable)bitmap;
Drawable drawable = (Drawable)bitmapDrawable;

Bitmap bitmap = new Bitmap (...);
Drawable drawable = new BitmapDrawable(bitmap);

[Drawable to Bitmap] 
Bitmap bitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
d.setBounds(0, 0, w, h);
d.draw(canvas);