以编程方式屏蔽屏幕的某些部分

Question

在我的应用程序中，我有一个矩形ImageView，其中包含一个白色背景，中间有一个孔。在它背后我设置了相机预览，所以只有孔显示相机。我怎么才能拍出IMAGEVIEW.X AND Y AND HEIGHT AND WIDTH的照片，这样我仍然可以看到脸。基本上将截图缩小到imageview的大小

Answer 1

希望这有助于。

private void takeScreenshot() {
Date now = new Date();
android.text.format.DateFormat.format("yyyy-MM-dd_hh:mm:ss", now);

try {
    // image naming and path  to include sd card  appending name you choose for file
    String mPath = Environment.getExternalStorageDirectory().toString() + "/" + now + ".jpg";

    // create bitmap screen capture
    View v1 = getWindow().getDecorView().getRootView();
    v1.setDrawingCacheEnabled(true);
    Bitmap bitmap = Bitmap.createBitmap(v1.getDrawingCache());
    v1.setDrawingCacheEnabled(false);

    File imageFile = new File(mPath);

    FileOutputStream outputStream = new FileOutputStream(imageFile);
    int quality = 100;
    bitmap.compress(Bitmap.CompressFormat.JPEG, quality, outputStream);
    outputStream.flush();
    outputStream.close();

    openScreenshot(imageFile);
} catch (Throwable e) {
    // Several error may come out with file handling or OOM
    e.printStackTrace();
 }
}