Android 一个将当前屏幕保存为图片文件的类

想要做图片的分享功能，首先就需要抓屏，将当前屏幕保存为一个图片文件。

import java.io.File;    import java.io.FileNotFoundException;    import java.io.FileOutputStream;    import java.io.IOException;        import android.app.Activity;    import android.graphics.Bitmap;    import android.graphics.Rect;    import android.view.View;        public class ScreenShot {            private static Bitmap takeScreenShot(Activity activity) {            // View是你需要截图的View            View view = activity.getWindow().getDecorView();            view.setDrawingCacheEnabled(true);            view.buildDrawingCache();            Bitmap b1 = view.getDrawingCache();                // 获取状态栏高度            Rect frame = new Rect();            activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);            int statusBarHeight = frame.top;                // 获取屏幕长和高            int width = activity.getWindowManager().getDefaultDisplay().getWidth();            int height = activity.getWindowManager().getDefaultDisplay()                    .getHeight();            // 去掉标题栏            Bitmap b = Bitmap.createBitmap(b1, 0, statusBarHeight, width, height                    - statusBarHeight);            view.destroyDrawingCache();            return b;        }            private static void savePic(Bitmap b, File filePath) {            FileOutputStream fos = null;            try {                fos = new FileOutputStream(filePath);                if (null != fos) {                    b.compress(Bitmap.CompressFormat.PNG, 100, fos);                    fos.flush();                    fos.close();                }            } catch (FileNotFoundException e) {                // e.printStackTrace();            } catch (IOException e) {                // e.printStackTrace();            }        }            public static void shoot(Activity a, File filePath) {            if (filePath == null) {                return;            }            if (!filePath.getParentFile().exists()) {                filePath.getParentFile().mkdirs();            }            ScreenShot.savePic(ScreenShot.takeScreenShot(a), filePath);        }    }