public static MyAndroidScreenshot GetInstance(Android.App.Activity activity = null)
{
lock (objLock)
{
if (s_Instance == null)
{
if (activity == null)
{
throw new Exception("MyScreenCapture.GetInstance 单例首次创建, 请传入 activity 参数");
}
s_Instance = new MyAndroidScreenshot(activity);
}
return(s_Instance);
}
}
/// <summary>
/// 开始截屏
/// </summary>
/// <param name="imageFileDateTime">时间参数 - 屏幕截图文件名命名规则所需</param>
/// <param name="dirName">屏幕截图保存文件夹名称</param>
public System.IO.FileInfo OnScreenshot(DateTime?imageFileDateTime, string dirName = "")
{
if (s_IsRunning.Get() == true)
{
string msg = "正在进行截屏, 无法再多开一个";
System.Diagnostics.Debug.WriteLine(msg);
showToast(msg);
return(null);
}
s_IsRunning.Set(true);
mImageFileDateTime = imageFileDateTime;
mDirName = dirName;
Android.Content.Intent intent = mProjectionManager.CreateScreenCaptureIntent();
mAppActivity.StartActivityForResult(intent, s_Screenshot_Request_Code);
return(MyAndroidScreenshot.GetScreenshotFileInfo(mImageFileDateTime, mDirName));
}
public void OnImageAvailable(Android.Media.ImageReader imageReader)
{
Android.Media.Image image = null;
Android.Graphics.Bitmap bitmapFromPlane0 = null;
Android.Graphics.Bitmap bitmapToSave = null;
try
{
image = imageReader.AcquireLatestImage();
if (image != null)
{
Android.Media.Image.Plane[] planes = image.GetPlanes();
if (planes.Length > 0)
{
int rowPadding = planes[0].RowStride - planes[0].PixelStride * mWidth;
bitmapFromPlane0 = Android.Graphics.Bitmap.CreateBitmap
(
width: (mWidth + rowPadding / planes[0].PixelStride), // 此处不能直接采用 Width, 否则保存的图片会出现花屏
height: mHeight,
config: Android.Graphics.Bitmap.Config.Argb8888
);
bitmapFromPlane0.CopyPixelsFromBuffer(planes[0].Buffer);
var imagefileInfo = MyAndroidScreenshot.GetScreenshotFileInfo(mImageFileDateTime, mDirName); // 传入目录名称
if (imagefileInfo.Directory.Exists == false)
{
imagefileInfo.Directory.Create();
}
string imageFile = imagefileInfo.FullName;
// bitmapFromPlane0 多增加的长度减至 屏幕的 Width
bitmapToSave = Android.Graphics.Bitmap.CreateBitmap(bitmapFromPlane0, 0, 0, mWidth, mHeight);
using (System.IO.FileStream stream = new System.IO.FileStream(path: imageFile, System.IO.FileMode.CreateNew))
{
bitmapToSave.Compress(Android.Graphics.Bitmap.CompressFormat.Png, 60, stream); // 压缩图片 // TODO 控制图片质量
stream.Flush();
}
// 发送广播
Android.App.Application.Context.SendBroadcast
(
new Android.Content.Intent
(
action: Android.Content.Intent.ActionMediaScannerScanFile,
uri: Android.Net.Uri.FromFile(new Java.IO.File(imageFile))
)
);
System.Diagnostics.Debug.WriteLine("MyImageReaderListener-OnImageAvailable - 成功保存屏幕截图");
}
}
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("MyImageReaderListener-OnImageAvailable - 捕获异常");
System.Diagnostics.Debug.WriteLine(e.GetFullInfo());
System.Diagnostics.Debugger.Break();
}
finally
{
if (bitmapFromPlane0 != null)
{
bitmapFromPlane0.Recycle();
bitmapFromPlane0 = null;
}
if (image != null)
{
image.Close();
image = null;
}
MyAndroidScreenshot.GetInstance().ReleaseAfterScreenCaptureSave();
MyAndroidScreenshot.s_IsRunning.Set(false);
}
}
public System.IO.FileInfo Get_ScreenshotFileInfo(DateTime?imageFileDateTime = null, string dirName = "")
{
return(MyAndroidScreenshot.GetScreenshotFileInfo(imageFileDateTime, dirName));
}
public System.IO.FileInfo OnScreenshotFromActivity(DateTime?imageFileDateTime = null, string dirName = "")
{
mImageFileDateTime = imageFileDateTime;
mDirName = dirName;
// View view = ctx.getWindow().getDecorView();
var view = mAppActivity.Window.DecorView;
// view.setDrawingCacheEnabled(true);
view.DrawingCacheEnabled = true;
// view.buildDrawingCache();
view.BuildDrawingCache();
Android.Graphics.Bitmap bp = Android.Graphics.Bitmap.CreateBitmap
(
view.DrawingCache,
0,
0,
view.MeasuredWidth,
view.MeasuredHeight
);
// view.setDrawingCacheEnabled(false);
view.DrawingCacheEnabled = false;
// view.destroyDrawingCache();
view.DestroyDrawingCache();
var imagefileInfo = MyAndroidScreenshot.GetScreenshotFileInfo(mImageFileDateTime, mDirName); // 传入目录名称
if (imagefileInfo.Directory.Exists == false)
{
imagefileInfo.Directory.Create();
}
string imageFile = imagefileInfo.FullName;
using (System.IO.FileStream stream = new System.IO.FileStream(path: imageFile, System.IO.FileMode.CreateNew))
{
bp.Compress(Android.Graphics.Bitmap.CompressFormat.Png, 60, stream); // 压缩图片 // TODO 控制图片质量
stream.Flush();
}
// 发送广播
Android.App.Application.Context.SendBroadcast
(
new Android.Content.Intent
(
action: Android.Content.Intent.ActionMediaScannerScanFile,
uri: Android.Net.Uri.FromFile(new Java.IO.File(imageFile))
)
);
string msg = "成功保存屏幕截图";
System.Diagnostics.Debug.WriteLine(msg);
showToast(msg);
return(imagefileInfo);
}
