Java tutorial
//package com.java2s; import android.content.Context; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Matrix; import android.view.WindowManager; import android.widget.ScrollView; public class Main { public static Bitmap zoomBitmap(Bitmap bitmap, int width, int height) { int w = bitmap.getWidth(); int h = bitmap.getHeight(); Matrix matrix = new Matrix(); float scaleWidth = ((float) width / w); float scaleHeight = ((float) height / h); matrix.postScale(scaleWidth, scaleHeight); Bitmap newbmp = Bitmap.createBitmap(bitmap, 0, 0, w, h, matrix, true); return newbmp; } public static Bitmap createBitmap(Context context, ScrollView v) { int width = 0, height = 0; for (int i = 0; i < v.getChildCount(); i++) { width += v.getChildAt(i).getWidth(); height += v.getChildAt(i).getHeight(); } if (width <= 0 || height <= 0) { return null; } int h = ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay().getHeight(); if (height < h) height = h; Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(bitmap); v.draw(canvas); return bitmap; } }