Android截屏分享
16lz
2021-12-04
最近项目需要实现Android截屏分享功能，包括Android截屏获取图片、将图片保存到本地、通知系统相册更新、通过微信、QQ、微博分享截屏图片，本篇博客作为总结回顾。
一、Android截屏获取图片
通过对view进行绘制，得到bitmap，可以对Activity、Fragment进行绘制，也可以对其他的View进行绘制。1 Activity截图（带空白的状态栏）
public Bitmap shotScreen(Activity activity) { View view = activity.getWindow().getDecorView(); view.setDrawingCacheEnabled(true); view.buildDrawingCache(); Bitmap bitmap = Bitmap.createBitmap(view.getDrawingCache(), 0, 0, view.getMeasuredWidth(), view.getMeasuredHeight()); view.setDrawingCacheEnabled(false); view.destroyDrawingCache(); return bitmap;}2 Activity截图（去掉状态栏）
public Bitmap shotActivityNoBar(Activity activity) { // 获取windows中最顶层的view View view = activity.getWindow().getDecorView(); view.buildDrawingCache(); // 获取状态栏高度 Rect rect = new Rect(); view.getWindowVisibleDisplayFrame(rect); int statusBarHeights = rect.top; Display display = activity.getWindowManager().getDefaultDisplay(); // 获取屏幕宽和高 int widths = display.getWidth(); int heights = display.getHeight(); // 允许当前窗口保存缓存信息 view.setDrawingCacheEnabled(true); // 去掉状态栏 Bitmap bmp = Bitmap.createBitmap(view.getDrawingCache(), 0, statusBarHeights, widths, heights - statusBarHeights); // 销毁缓存信息 view.destroyDrawingCache(); return bmp;}3 Fragment截图
public Bitmap getFragmentBitmap(Fragment fragment) { View v = fragment.getView(); v.buildDrawingCache(false); return v.getDrawingCache();}public Bitmap combineBitmapInCenter(Bitmap background, Bitmap midBitmap, Bitmap foreground) { if (!background.isMutable()) { background = background.copy(Bitmap.Config.ARGB_8888, true); } Paint paint = new Paint(); Canvas canvas = new Canvas(background); int bw = background.getWidth(); int bh = background.getHeight(); int mw = midBitmap.getWidth(); int mh = midBitmap.getHeight(); int mx = (mw - bw) / 2; int my = (mh - bh) / 2; canvas.drawBitmap(midBitmap, mx, my, paint); int fw = foreground.getWidth(); int fh = foreground.getHeight(); int fx = (fw - bw) / 2; int fy = (fh - bh) / 2; canvas.drawBitmap(foreground, fx, fy, paint); canvas.save(Canvas.ALL_SAVE_FLAG); canvas.restore(); return background;}需要注意：view的绘制必须在UI线程完成，否则会crash；bitmap的合并会较耗时，需在子线程完成。
二 、将bitmap保存在本地
public void saveBitmapToFile(String fileName, Bitmap bitmap) { if (TextUtils.isEmpty(fileName) || bitmap == null) return; try { File f = new File(fileName); f.createNewFile(); FileOutputStream fOut = new FileOutputStream(f); bitmap.compress(Bitmap.CompressFormat.JPEG, 80, fOut); fOut.flush(); fOut.close(); } catch (FileNotFoundException e) { Log.i("ScreenShotUtil", "保存失败"); e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); }}三、通知系统相册更新
public void AlbumScan(String fileName) { MediaScannerConnection.scanFile(mActivity.getApplicationContext(), new String[]{fileName}, new String[]{"image/jpeg"}, null);}四、通过微信、QQ、微博分享
通过微信、QQ、微博分享的sdk实现，如下：1 分享到微信朋友圈
public void shareToWexinCircle() { if (iShareService.isWeixinInstalled()) {//判断微信是否安装 Bitmap mWXShareBitmap = mLatesBitmap;//将截屏得到的bitmap赋值 WXImageObject imgObject = new WXImageObject(mWXShareBitmap); WXMediaMessage mediaMessage = new WXMediaMessage(); mediaMessage.mediaObject = imgObject; Log.i(TAG,"mediaMessage.mediaObject = imgObject"); //设置缩略图 Bitmap thumbBmp = Bitmap.createScaledBitmap(mWXShareBitmap,50,80,true); mediaMessage.thumbData = bmpToByteArray(thumbBmp,true); Log.i(TAG,"设置缩略图"); //request to wx SendMessageToWX.Req req = new SendMessageToWX.Req(); req.transaction = buildTransaction("img");//分享类型是图片 req.message = mediaMessage; req.scene = SendMessageToWX.Req.WXSceneTimeline;//分享到朋友圈 Log.i(TAG,"request to wx"); IWXAPI api = WXAPIFactory.createWXAPI(mActivity,"微信分享id",true); api.registerApp("微信分享id"); boolean result = api.sendReq(req); Log.i(TAG,"share to circle:"+result); } else { ToastUtils.show(mActivity, "您没有安装微信客户端"); }}public byte[] bmpToByteArray(final Bitmap bmp, final boolean needRecycle) { ByteArrayOutputStream output = new ByteArrayOutputStream(); bmp.compress(Bitmap.CompressFormat.PNG, 100, output); if (needRecycle) { bmp.recycle(); } byte[] result = output.toByteArray(); try { output.close(); } catch (Exception e) { e.printStackTrace(); } return result;}private String buildTransaction(final String type) { return (type == null) ? String.valueOf(System.currentTimeMillis()) : type + System.currentTimeMillis();}
2、分享到微信好友
public void shareWexinFriend() { if (iShareService.isWeixinInstalled()) { mWXShareBitmap = mLatesBitmap; WXImageObject imgObject = new WXImageObject(mWXShareBitmap); WXMediaMessage mediaMessage = new WXMediaMessage(); mediaMessage.mediaObject = imgObject; //设置缩略图 Bitmap thumbBmp = Bitmap.createScaledBitmap(mWXShareBitmap,50,80,true); mediaMessage.thumbData = bmpToByteArray(thumbBmp,true); //request to wx SendMessageToWX.Req req = new SendMessageToWX.Req(); req.transaction =buildTransaction("img"); req.message = mediaMessage; req.scene = SendMessageToWX.Req.WXSceneSession; IWXAPI api = WXAPIFactory.createWXAPI(mActivity,"微信分享id",true); api.registerApp("微信分享id"); boolean result = api.sendReq(req); Log.i(TAG,"share to weixin:"+result ); } else { ToastUtils.show(mActivity, "您没有安装微信客户端"); }}3、分享到QQ好友
public void shareToQQFriend() { if (iShareService.isQQInstalled()) {//判断QQ是否安装 Tencent tencent = Tencent.createInstance("qq id", mActivity); Bundle params = new Bundle(); params.putString(QQShare.SHARE_TO_QQ_IMAGE_LOCAL_URL, mLatestImagePath);//QQ分享只能分享本地图片，传入本地图片路径 params.putInt(QQShare.SHARE_TO_QQ_KEY_TYPE, QQShare.SHARE_TO_QQ_TYPE_IMAGE); tencent.shareToQQ(mActivity, params, new IUiListener() {//分享后的回调 @Override public void onComplete(Object o) { ToastUtils.show(mActivity,"分享成功！"); } @Override public void onError(UiError uiError) { ToastUtils.show(mActivity,"分享失败，稍后重试！"); Log.i(TAG,"shareToQQ onError"); } @Override public void onCancel() { Log.i(TAG,"shareToQQ onCancel"); } }); } else { ToastUtils.show(mActivity, "您没有安装QQ客户端"); }}4 QQ空间分享
public void shareToQQZone() { if (iShareService.isQQInstalled()) { Tencent tencent = Tencent.createInstance("QQ id", mActivity); Bundle params = new Bundle(); params.putString(QQShare.SHARE_TO_QQ_IMAGE_LOCAL_URL, mLatestImagePath); params.putInt(QQShare.SHARE_TO_QQ_KEY_TYPE, QQShare.SHARE_TO_QQ_TYPE_IMAGE); params.putInt(QQShare.SHARE_TO_QQ_EXT_INT, QQShare.SHARE_TO_QQ_FLAG_QZONE_AUTO_OPEN); tencent.shareToQQ(mActivity, params, new IUiListener() { @Override public void onComplete(Object o) { ToastUtils.show(mActivity,"分享成功！"); } @Override public void onError(UiError uiError) { ToastUtils.show(mActivity,"分享失败，请稍后重试！"); Log.i(TAG,"shareToQQ onError，error code:"+uiError.errorCode); } @Override public void onCancel() { Log.i(TAG,"shareToQQ onCancel"); } }); } else { ToastUtils.show(mActivity, "您没有安装QQ客户端"); }}5 微博分享
public void shareToWeibo() { if (iShareService.isWeiboInstalled()) { Log.i(TAG,"iShareService.isWeiboInstalled()"); IWeiboShareAPI api = WeiboShareSDK.createWeiboAPI(mActivity, "微博id"); if(api.isWeiboAppInstalled()) { api.registerApp(); } WeiboMultiMessage weiboMultiMessage = new WeiboMultiMessage(); Bitmap bitmap = mLatesBitmap;//截图bitmap ImageObject imageObject = new ImageObject(); imageObject.setImageObject(bitmap); weiboMultiMessage.imageObject = imageObject; SendMultiMessageToWeiboRequest request = new SendMultiMessageToWeiboRequest(); request.transaction = String.valueOf(System.currentTimeMillis()); request.multiMessage = weiboMultiMessage; boolean requestWeibo = api.sendRequest(request); Log.i(TAG,"share to weibo:"+requestWeibo ); } else { ToastUtils.show(mActivity, "您没有安装微博客户端"); }}Android开发交流群：576500546
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