Android實現截屏與截長圖功能

2019-12-12 00:53:52

字體：大中小

來源：轉載

供稿：網友

本文實例為大家分享了Android實現截屏與截長圖功能展示的具體代碼，供大家參考，具體內容如下

Demo在GitHub的地址：ScreenShoot

Demo在CSDN上的下載地址：Android實現截屏與截長圖功能

在Android開發中，有時候會遇到需要截屏分享到朋友圈或者QQ，截屏有截取當前屏幕，也有需要截取不僅一個屏幕，可能會很長。

截取當前屏幕并保存到內存卡的方法：

// 獲取指定Activity的截屏，保存到png文件 public static Bitmap takeScreenShot(Activity activity) {  // View是你需要截圖的View  View view = activity.getWindow().getDecorView();  view.setDrawingCacheEnabled(true);  view.buildDrawingCache();  Bitmap b1 = view.getDrawingCache();  // 獲取狀態欄高度  Rect frame = new Rect();  activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);  int statusBarHeight = frame.top;  System.out.println(statusBarHeight);  // 獲取屏幕長和高  int width = activity.getWindowManager().getDefaultDisplay().getWidth();  int height = activity.getWindowManager().getDefaultDisplay()    .getHeight();  // 去掉標題欄  // 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 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();  } }// 程序入口 截取當前屏幕 public static void shootLoacleView(Activity a,String picpath) {  ScreenShot.savePic(ScreenShot.takeScreenShot(a), picpath); }

當視圖超過一個屏幕的時候，可能是listview，也可能是Scrollview，這時候，其實截圖就是對listview或者Scrollview進行截圖：

 /**  * 截取scrollview的屏幕  * **/ public static Bitmap getScrollViewBitmap(ScrollView scrollView,String picpath) {  int h = 0;  Bitmap bitmap;  // 獲取listView實際高度  for (int i = 0; i < scrollView.getChildCount(); i++) {   h += scrollView.getChildAt(i).getHeight();  }  Log.d(TAG, "實際高度:" + h);  Log.d(TAG, " 高度:" + scrollView.getHeight());  // 創建對應大小的bitmap  bitmap = Bitmap.createBitmap(scrollView.getWidth(), h,    Bitmap.Config.ARGB_8888);  final Canvas canvas = new Canvas(bitmap);  scrollView.draw(canvas);  // 測試輸出  FileOutputStream out = null;  try {   out = new FileOutputStream(picpath);  } catch (FileNotFoundException e) {   e.printStackTrace();  }  try {   if (null != out) {    bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);    out.flush();    out.close();   }  } catch (IOException e) {  }  return bitmap; } private static String TAG = "Listview and ScrollView item 截圖:"; /**  * 截圖listview  * **/ public static Bitmap getListViewBitmap(ListView listView,String picpath) {  int h = 0;  Bitmap bitmap;  // 獲取listView實際高度  for (int i = 0; i < listView.getChildCount(); i++) {   h += listView.getChildAt(i).getHeight();  }  Log.d(TAG, "實際高度:" + h);  Log.d(TAG, "list 高度:" + listView.getHeight());  // 創建對應大小的bitmap  bitmap = Bitmap.createBitmap(listView.getWidth(), h,    Bitmap.Config.ARGB_8888);  final Canvas canvas = new Canvas(bitmap);  listView.draw(canvas);  // 測試輸出  FileOutputStream out = null;  try {   out = new FileOutputStream(picpath);  } catch (FileNotFoundException e) {   e.printStackTrace();  }  try {   if (null != out) {    bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);    out.flush();    out.close();   }  } catch (IOException e) {  }  return bitmap; } // 程序入口 截取ScrollView public static void shootScrollView(ScrollView scrollView,String picpath) {  ScreenShot.savePic(getScrollViewBitmap(scrollView, picpath), picpath); } // 程序入口 截取ListView public static void shootListView(ListView listView,String picpath) {  ScreenShot.savePic(getListViewBitmap(listView,picpath), picpath); }

截長圖的效果圖：