我有将布局保存为位图的代码
这是
public static class App
{
public static Java.IO.File _file;
public static Java.IO.File _dir;
public static Bitmap bitmap;
}
[Activity(Label = "SaveViewAsBitMap", ScreenOrientation = ScreenOrientation.Landscape, Theme = "@android:style/Theme.Black.NoTitleBar")]
public class Badge : Activity
{
public static string name_from_activity;
public static string surname_from_activity;
public string inn_from_activity;
private ImageView _imageView;
protected override void OnActivityResult(int requestCode, Result resultCode, Intent data)
{
base.OnActivityResult(requestCode, resultCode, data);
// Make it available in the gallery
Intent mediaScanIntent = new Intent(Intent.ActionMediaScannerScanFile);
Uri contentUri = Uri.FromFile(App._file);
mediaScanIntent.SetData(contentUri);
SendBroadcast(mediaScanIntent);
// Display in ImageView. We will resize the bitmap to fit the display
// Loading the full sized image will consume to much memory
// and cause the application to crash.
int height = Resources.DisplayMetrics.HeightPixels;
int width = _imageView.Height;
App.bitmap = App._file.Path.LoadAndResizeBitmap(width, height);
if (App.bitmap != null)
{
_imageView.SetImageBitmap(App.bitmap);
App.bitmap = null;
}
// Dispose of the Java side bitmap.
GC.Collect();
}
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
// Set our view from the "main" layout resource
SetContentView (Resource.Layout.Main);
TextView bt1 = FindViewById<TextView>(Resource.Id.Surname);
bt1.Click += Bt1_Click;
name_from_activity = Intent.GetStringExtra("Name");
surname_from_activity = Intent.GetStringExtra("Surname");
inn_from_activity = Intent.GetStringExtra("INN");
TextView Name = FindViewById<TextView>(Resource.Id.Name);
Name.Text = name_from_activity;
TextView Surname = FindViewById<TextView>(Resource.Id.Surname);
Surname.Text = surname_from_activity;
string path = "Fonts/proximanovaregular.otf";
Typeface tf = Typeface.CreateFromAsset(Assets, path); //Custom fonts for TextBoxes
Name.Typeface = tf;
Surname.Typeface = tf;
var barcodeWriter = new ZXing.Mobile.BarcodeWriter //Creating qr code using Intent data
{
Format = ZXing.BarcodeFormat.QR_CODE,
Options = new ZXing.Common.EncodingOptions //Options for QR code dimensions
{
Width = 600,
Height = 600
}
};
ImageView qr = FindViewById<ImageView>(Resource.Id.qr);
var bitmap = barcodeWriter.Write(inn_from_activity);
qr.SetImageBitmap(bitmap);
if (IsThereAnAppToTakePictures())
{
CreateDirectoryForPictures();
_imageView = FindViewById<ImageView>(Resource.Id.photo);
TakeAPicture();
}
}
//Button handler for bitmap
private void Bt1_Click(object sender, System.EventArgs e)
{
View v = FindViewById<LinearLayout>(Resource.Id.badge2);
Bitmap myBitMap = createViewBitmap(v);
Drawable drawable = new BitmapDrawable(myBitMap);
//img.SetBackgroundDrawable(drawable);
// MediaStore.Images.Media.InsertImage(ContentResolver, myBitMap, "title", "description");
saveImage(myBitMap);
Intent mediaScanIntent2 = new Intent(Intent.ActionMediaScannerScanFile);
Java.IO.File myFile = new Java.IO.File(Android.OS.Environment.ExternalStorageDirectory + "/DCIM/Camera", name_from_activity.ToString() + surname_from_activity.ToString() + ".jpg");
Android.Net.Uri contentUri = Android.Net.Uri.FromFile(myFile);
mediaScanIntent2.SetData(contentUri);
SendBroadcast(mediaScanIntent2);
}
//Creating bitmap from view via Canvas
public Bitmap createViewBitmap(View v)
{
Bitmap bitmap = Bitmap.CreateBitmap(v.Width, v.Height,
Bitmap.Config.Argb8888);
Canvas canvas = new Canvas(bitmap);
v.Draw(canvas);
return bitmap;
}
//Check if directory exists, if no, create it
private void CreateDirectoryForPictures()
{
App._dir = new Java.IO.File(
Environment.GetExternalStoragePublicDirectory(
Environment.DirectoryPictures), "CameraAppDemo");
if (!App._dir.Exists())
{
App._dir.Mkdirs();
}
}
//Returning avialable activities
private bool IsThereAnAppToTakePictures()
{
Intent intent = new Intent(MediaStore.ActionImageCapture);
IList<ResolveInfo> availableActivities =
PackageManager.QueryIntentActivities(intent, PackageInfoFlags.MatchDefaultOnly);
return availableActivities != null && availableActivities.Count > 0;
}
//Method for opening default Camera Activity and making photo
private void TakeAPicture()
{
Intent intent = new Intent(MediaStore.ActionImageCapture);
App._file = new Java.IO.File(App._dir, String.Format("myPhoto_{0}.jpg", Guid.NewGuid()));
intent.PutExtra(MediaStore.ExtraOutput, Uri.FromFile(App._file));
StartActivityForResult(intent, 0);
}
//Method for saving image to device
public static void saveImage(Bitmap bmp)
{
try
{
using (var os = new System.IO.FileStream(Android.OS.Environment.ExternalStorageDirectory + "/DCIM/Camera/" + name_from_activity.ToString()+surname_from_activity.ToString() + ".jpg", System.IO.FileMode.CreateNew))
{
bmp.Compress(Bitmap.CompressFormat.Jpeg, 95, os);
}
}
catch (Exception e)
{
}
}
}
}
我需要以370 * 204分辨率保存图片
我试试这个
public Bitmap createViewBitmap(View v)
{
Bitmap bitmap = Bitmap.CreateBitmap(370, 204,
Bitmap.Config.Argb8888);
Canvas canvas = new Canvas(bitmap);
v.Draw(canvas);
return bitmap;
}
但它不起作用，它只保存部分布局。
我需要编写代码吗？
感谢您的帮助。
答案 0 :(得分：0)
我为另一个我正在使用的项目构建了一个原型......
答案 1 :(得分：0)
此代码Bitmap.CreateBitmap(370, 204,Bitmap.Config.Argb8888);将剪切宽度为370和高度为204的源位图。位图不会缩放。因为您仍然使用视图来绘制位图。
获得视图位图时，需要缩放位图：
public static Bitmap zoomImg(Bitmap bm, int newWidth, int newHeight)
{
int width = bm.Width;
int height = bm.Height;
float scaleWidth = ((float)newWidth) / width;
float scaleHeight = ((float)newHeight) / height;
Matrix matrix = new Matrix();
matrix.PostScale(scaleWidth, scaleHeight);
Bitmap newbm = Bitmap.CreateBitmap(bm, 0, 0, width, height, matrix, true);
return newbm;
}
public Bitmap createViewBitmap2(View v)
{
Bitmap bitmap = Bitmap.CreateBitmap(v.Width, v.Height,Bitmap.Config.Argb8888);
Canvas canvas = new Canvas(bitmap);
v.Draw(canvas);
return zoomImg(bitmap, 370, 204);
}