Android截屏分享功能

發(fā)布時間：2020-08-23 03:48:10 來源：腳本之家閱讀：202 作者：奔跑的佩恩欄目：移動開發(fā)

最近項目需要實現(xiàn)Android截屏分享功能，包括Android截屏獲取圖片、將圖片保存到本地、通知系統(tǒng)相冊更新、通過微信、QQ、微博分享截屏圖片，本篇文章作為總結回顧。

一、Android截屏獲取圖片

通過對view進行繪制，得到bitmap，可以對Activity、Fragment進行繪制，也可以對其他的View進行繪制。

1 Activity截圖（帶空白的狀態(tài)欄）

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截圖（去掉狀態(tài)欄）

public Bitmap shotActivityNoBar(Activity activity) { 
 // 獲取windows中最頂層的view 
 View view = activity.getWindow().getDecorView(); 
 view.buildDrawingCache(); 
 // 獲取狀態(tài)欄高度 
 Rect rect = new Rect(); 
 view.getWindowVisibleDisplayFrame(rect); 
 int statusBarHeights = rect.top; 
 Display display = activity.getWindowManager().getDefaultDisplay(); 
 // 獲取屏幕寬和高 
 int widths = display.getWidth(); 
 int heights = display.getHeight(); 
 // 允許當前窗口保存緩存信息 
 view.setDrawingCacheEnabled(true); 
 // 去掉狀態(tài)欄 
 Bitmap bmp = Bitmap.createBitmap(view.getDrawingCache(), 0, 
   statusBarHeights, widths, heights - statusBarHeights); 
 // 銷毀緩存信息 
 view.destroyDrawingCache(); 
 return bmp; 
}

3 Fragment截圖

public Bitmap getFragmentBitmap(Fragment fragment) { 
 View v = fragment.getView(); 
 v.buildDrawingCache(false); 
 return v.getDrawingCache(); 
}

繪制View的方式只適用于靜態(tài)View，SurfaceView、IjkVideoView等播放視頻的View，不能截取到；此外，某些動畫類View也不能截取到。針對上述情況，可獲取SurfaceView的一幀生成bitmap，將bitmap進行合并，同理動畫類View也可以合并。例如，最底層播放視頻、中間層播放動畫、最上層是普通的view，可將bitmap合并，如下：

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的繪制必須在UI線程完成，否則會crash；bitmap的合并會較耗時，需在子線程完成。

二、將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", "保存失敗"); 
   e.printStackTrace(); 
  } catch (IOException e) { 
   e.printStackTrace(); 
  } 
}

三、通知系統(tǒng)相冊更新

public void AlbumScan(String fileName) { 
  MediaScannerConnection.scanFile(mActivity.getApplicationContext(), new String[]{fileName}, new String[]{"image/jpeg"}, null); 
}

四、通過微信、QQ、微博分享

通過微信、QQ、微博分享的sdk實現(xiàn)，如下：

1 分享到微信朋友圈

public void shareToWexinCircle() { 
  if (iShareService.isWeixinInstalled()) {//判斷微信是否安裝 
   Bitmap mWXShareBitmap = mLatesBitmap;//將截屏得到的bitmap賦值 
   WXImageObject imgObject = new WXImageObject(mWXShareBitmap); 
   WXMediaMessage mediaMessage = new WXMediaMessage(); 
   mediaMessage.mediaObject = imgObject; 
   Log.i(TAG,"mediaMessage.mediaObject = imgObject"); 
   //設置縮略圖 
   Bitmap thumbBmp = Bitmap.createScaledBitmap(mWXShareBitmap,50,80,true); 
   mediaMessage.thumbData = bmpToByteArray(thumbBmp,true); 
   Log.i(TAG,"設置縮略圖"); 
   //request to wx 
   SendMessageToWX.Req req = new SendMessageToWX.Req(); 
   req.transaction = buildTransaction("img");//分享類型是圖片 
   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, "您沒有安裝微信客戶端"); 
  } 
} 

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; 
} 

<pre name="code" class="java">private String buildTransaction(final String type) { 
  return (type == null) ? String.valueOf(System.currentTimeMillis()) : type + System.currentTimeMillis(); 
}</pre> 
<h4><a name="t8"></a><br>

2、分享到微信好友</h4>

<pre></pre> 
<pre name="code" class="java"> public void shareWexinFriend() { 
  if (iShareService.isWeixinInstalled()) { 
   mWXShareBitmap = mLatesBitmap; 
   WXImageObject imgObject = new WXImageObject(mWXShareBitmap); 
   WXMediaMessage mediaMessage = new WXMediaMessage(); 
   mediaMessage.mediaObject = imgObject; 
   //設置縮略圖 
   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, "您沒有安裝微信客戶端"); 
  } 
}</pre> 
<h4><a name="t9"></a>3、分享到QQ好友</h4> 
<pre name="code" class="java"> public void shareToQQFriend() { 
  if (iShareService.isQQInstalled()) {//判斷QQ是否安裝 
   Tencent tencent = Tencent.createInstance("qq id", mActivity); 
   Bundle params = new Bundle(); 
   params.putString(QQShare.SHARE_TO_QQ_IMAGE_LOCAL_URL, mLatestImagePath);//QQ分享只能分享本地圖片，傳入本地圖片路徑 
   params.putInt(QQShare.SHARE_TO_QQ_KEY_TYPE, QQShare.SHARE_TO_QQ_TYPE_IMAGE); 
   tencent.shareToQQ(mActivity, params, new IUiListener() {//分享后的回調(diào) 
    @Override 
    public void onComplete(Object o) { 
     ToastUtils.show(mActivity,"分享成功！"); 
    } 
    @Override 
    public void onError(UiError uiError) { 
     ToastUtils.show(mActivity,"分享失敗，稍后重試！"); 
     Log.i(TAG,"shareToQQ onError"); 
    } 
    @Override 
    public void onCancel() { 
     Log.i(TAG,"shareToQQ onCancel"); 
    } 
   }); 
  } else { 
   ToastUtils.show(mActivity, "您沒有安裝QQ客戶端"); 
  } 
}</pre> 
<pre></pre> 
<pre></pre>

4 QQ空間分享

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,"分享失敗，請稍后重試！"); 
     Log.i(TAG,"shareToQQ onError，error code:"+uiError.errorCode); 
    } 
    @Override 
    public void onCancel() { 
     Log.i(TAG,"shareToQQ onCancel"); 
    } 
   }); 
  } else { 
   ToastUtils.show(mActivity, "您沒有安裝QQ客戶端"); 
  }

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;//截圖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, "您沒有安裝微博客戶端"); 
  } 
}

總結

以上所述是小編給大家介紹的Android截屏分享功能，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對億速云網(wǎng)站的支持！

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