android中代码实现截图功能（静态+动态视频）

分享下静态截图的功能代码：

public class ScreenShot {    // 获取指定Activity的截屏，保存到png文件    static Bitmap takeScreenShot(Activity activity) {    Log.i("TAG","tackScreenShot");        // View是你须要截图的View        View view = activity.getWindow().getDecorView();        view.setDrawingCacheEnabled(true);        view.buildDrawingCache();        Bitmap b1 = view.getDrawingCache();        // 获取状况栏高度        Rect frame = new Rect();        activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);        int statusBarHeight = frame.top;        Log.i("TAG", "statusBarHeight = " + statusBarHeight);        // 获取屏幕长和高        int width = activity.getWindowManager().getDefaultDisplay().getWidth();        int height = activity.getWindowManager().getDefaultDisplay()                .getHeight();        // 去掉题目栏        // Bitmap b = Bitmap.createBitmap(b1, 0, 25, 320, 455);        Bitmap b = Bitmap.createBitmap(b1, 0, statusBarHeight, width, height                - statusBarHeight);        view.destroyDrawingCache();        return b;    }    // 保存到sdcard    private static void savePic(Bitmap b, String strFileName) {        FileOutputStream fos = null;        try {        Log.i("TAG","start savePic");            fos = new FileOutputStream(strFileName);            Log.i("TAG","strFileName = " + strFileName);            if (null != fos) {                b.compress(Bitmap.CompressFormat.PNG, 90, fos);                fos.flush();                fos.close();                Log.i("TAG","save pic");            }        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }    }    public static void shoot(Activity a,String b) {        //ScreenShot.savePic(ScreenShot.takeScreenShot(a), "sdcard/xx.png");    Log.i("TAG","shot");    Bitmap bitmap = ScreenShot.takeScreenShot(a);ScreenShot.savePic(bitmap, b);    }}

以下是对正在播放的视频进行截图的功能代码：

private Bitmap createVideoThumbnail(String filePath) {Bitmap bitmap = null;android.media.MediaMetadataRetriever retriever = new android.media.MediaMetadataRetriever();try {// MODE_CAPTURE_FRAME_ONLY//retriever//.setMode(android.media.MediaMetadataRetriever.MODE_CAPTURE_FRAME_ONLY);//retriever.setMode(MediaMetadataRetriever.MODE_CAPTURE_FRAME_ONLY);retriever.setDataSource(filePath);//bitmap = retriever.captureFrame();String timeString = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION);long time = Long.parseLong(timeString) * 1000;Log.i("TAG","time = " + time);bitmap = retriever.getFrameAtTime(time*31/160); //按视频长度比例选择帧} catch (IllegalArgumentException ex) {// Assume this is a corrupt video file} catch (RuntimeException ex) {// Assume this is a corrupt video file.} finally {try {retriever.release();} catch (RuntimeException ex) {// Ignore failures while cleaning up.}}return bitmap;}

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