取得当前屏幕的截图

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取得当前屏幕的截图主要使用了Bitmap 类里的方法，首相取得一个bitmap 然后用取得的bitmap 去绘制一张图片然后进行保存。

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.os.Environment;import android.util.Log;import android.view.View;public class ShotScreen {private static final String TAG="shotscreen";@SuppressWarnings("unused")private static Bitmap takeScreenShot(Activity activity){View view =activity.getWindow().getDecorView();view.setDrawingCacheEnabled(true);view.buildDrawingCache();Bitmap bitmap = view.getDrawingCache();Rect rect = new Rect();activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(rect);int statusBarHeight = rect.top;System.out.println(statusBarHeight);int width =activity.getWindowManager().getDefaultDisplay().getWidth();int height =activity.getWindowManager().getDefaultDisplay().getHeight();Bitmap bitmap2 = Bitmap.createBitmap(bitmap,0,statusBarHeight, width, height - statusBarHeight);view.destroyDrawingCache();return bitmap2;}@SuppressWarnings("unused")private static void savePic(Bitmap bitmap,String filename){FileOutputStream fileOutputStream = null;try {fileOutputStream = new FileOutputStream(filename);if (fileOutputStream != null) {bitmap.compress(Bitmap.CompressFormat.PNG, 90, fileOutputStream);fileOutputStream.flush();fileOutputStream.close();}} catch (FileNotFoundException e) {Log.d(TAG, "Exception:FileNotFoundException");e.printStackTrace();} catch (IOException e) {Log.d(TAG, "IOException:IOException");e.printStackTrace();}}/** *  * @param a */public static void shoot(Activity a){if (android.os.Environment.MEDIA_MOUNTED != "mounted") {ShotScreen.savePic(ShotScreen.takeScreenShot(a), "/sdcard/抽样.png");   }else{ShotScreen.savePic(ShotScreen.takeScreenShot(a), "/data/data/"+a.getPackageName()+"/抽样.png");}    }

android之截屏(包括截取scrollview与listview的)

public class ScreenShot {    // 获取指定Activity的截屏，保存到png文件    public 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;        System.out.println(statusBarHeight);         // 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, 25, 320, 455);        Bitmap b = Bitmap.createBitmap(b1, 0, statusBarHeight, width, height                - statusBarHeight);        view.destroyDrawingCache();        savePic(b, "/sdcard/screen_test.png");        return b;    }     // 保存到sdcard    public static void savePic(Bitmap b, String strFileName) {        FileOutputStream fos = null;        try {            fos = new FileOutputStream(strFileName);            if (null != fos) {                b.compress(Bitmap.CompressFormat.PNG, 90, fos);                fos.flush();                fos.close();            }        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }    }     /**     * 把View对象转换成bitmap     * */    public static Bitmap convertViewToBitmap(View view) {        view.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED),                MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));        view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());        view.buildDrawingCache();        Bitmap bitmap = view.getDrawingCache();        if (bitmap != null) {            System.out.println("这不是nullde1");            Log.d("nullde1", "nullde1");        } else {            System.out.println("这nullnulllnulnlul");        }        return bitmap;    }     // 程序入口1    public static void shoot(Activity a) {        ScreenShot.savePic(ScreenShot.takeScreenShot(a), "/sdcard/screen_test.png");    }     // 程序入口2    public static void shootView(View view) {        ScreenShot.savePic(ScreenShot.convertViewToBitmap(view),                "sdcard/xx.png");    }     public static Bitmap getViewBitmap(View v) {        v.clearFocus();        v.setPressed(false);         boolean willNotCache = v.willNotCacheDrawing();        v.setWillNotCacheDrawing(false);         // Reset the drawing cache background color to fully transparent        // for the duration of this operation        int color = v.getDrawingCacheBackgroundColor();        v.setDrawingCacheBackgroundColor(0);         if (color != 0) {            v.destroyDrawingCache();        }        v.buildDrawingCache();        Bitmap cacheBitmap = v.getDrawingCache();        if (cacheBitmap == null) {            Log.e("TTTTTTTTActivity", "failed getViewBitmap(" + v + ")",                    new RuntimeException());            return null;        }         Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);         // Restore the view        v.destroyDrawingCache();        v.setWillNotCacheDrawing(willNotCache);        v.setDrawingCacheBackgroundColor(color);         return bitmap;    }     /**     * 截取scrollview的屏幕     * **/    public static Bitmap getBitmapByView(ScrollView scrollView) {        int h = 0;        Bitmap bitmap = null;        // 获取listView实际高度        for (int i = 0; i < scrollView.getChildCount(); i++) {            h += scrollView.getChildAt(i).getHeight();            scrollView.getChildAt(i).setBackgroundResource(R.drawable.bg3);        }        Log.d(TAG, "实际高度:" + h);        Log.d(TAG, " 高度:" + scrollView.getHeight());        // 创建对应大小的bitmap        bitmap = Bitmap.createBitmap(scrollView.getWidth(), h,                Bitmap.Config.ARGB_8888);        final Canvas canvas = new Canvas(bitmap);        scrollView.draw(canvas);        // 测试输出        FileOutputStream out = null;        try {            out = new FileOutputStream("/sdcard/screen_test.png");        } catch (FileNotFoundException e) {            e.printStackTrace();        }        try {            if (null != out) {                bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);                out.flush();                out.close();            }        } catch (IOException e) {            // TODO: handle exception        }        return bitmap;    }     private static String TAG = "Listview and ScrollView item 截图:";     /**     *  截图listview     * **/    public static Bitmap getbBitmap(ListView listView) {        int h = 0;        Bitmap bitmap = null;        // 获取listView实际高度        for (int i = 0; i < listView.getChildCount(); i++) {            h += listView.getChildAt(i).getHeight();        }        Log.d(TAG, "实际高度:" + h);        Log.d(TAG, "list 高度:" + listView.getHeight());        // 创建对应大小的bitmap        bitmap = Bitmap.createBitmap(listView.getWidth(), h,                Bitmap.Config.ARGB_8888);        final Canvas canvas = new Canvas(bitmap);        listView.draw(canvas);        // 测试输出        FileOutputStream out = null;        try {            out = new FileOutputStream("/sdcard/screen_test.png");        } catch (FileNotFoundException e) {            e.printStackTrace();        }        try {            if (null != out) {                bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);                out.flush();                out.close();            }        } catch (IOException e) {            // TODO: handle exception        }        return bitmap;    } }

Android中View转换为Bitmap及getDrawingCache=null的解决方法
http://www.cnblogs.com/devinzhang/archive/2012/06/05/2536848.html

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