Ich habe ein Bild verwendet, das wir aus der Galerie auswählen oder vielleicht Kamera verwenden können. Ich verwende eine benutzerdefinierte Ansicht zum Zoomen und zum Freihandmalen. Ich habe Leinwand und Farbe für die Bearbeitung auf Bild verwendet, aber mein Problem ist, dass, wenn wir beginnen, auf Touch-Ereignis zu malen, aber nicht gleich x, y koordinieren Sie es unter viel zu berühren Punkt angezeigt. Bitte helfen Sie mir, wie mein Code zu verbessern mein Ziel mein Code zu erreichen, hier ist ...Freihandmalerei funktioniert nicht richtig?
public class EditImage extends Activity implements OnTouchListener{
TouchImageView edit_img;//custom image view
Bitmap bitmap;
String imagepath;
Bitmap alteredBitmap,alteredBitmap1;
Canvas canvas;
Paint paint;
Matrix matrix;
float downx = 0;
float downy = 0;
float upx = 0;
float upy = 0;
int count=0;
/** Called when the activity is first created. */
@SuppressWarnings("deprecation")
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.editscreen2);
// TODO Auto-generated method stub
Button back_btn=(Button)findViewById(R.id.back_button);
back_btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
finish();
}
});
Intent extras=getIntent();
Uri imageFileUri = Uri.parse(extras.getStringExtra("imagepath"));
edit_img=(TouchImageView)findViewById(R.id.editimage);
Log.i("imagepath2",imageFileUri+"");
try {
BitmapFactory.Options bmpFactoryOptions = new BitmapFactory.Options();
bmpFactoryOptions.inJustDecodeBounds = false;
bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream
(imageFileUri), null, bmpFactoryOptions);
alteredBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap
.getHeight(), Config.ARGB_8888);
canvas = new Canvas(alteredBitmap);
paint = new Paint();
paint.setColor(Color.BLACK);
paint.setAntiAlias(true);
paint.setDither(true);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeJoin(Paint.Join.ROUND);
paint.setStrokeCap(Paint.Cap.ROUND);
paint.setStrokeWidth(5);
matrix = new Matrix();
canvas.drawBitmap(bitmap, matrix, paint);
Drawable drawable = (Drawable)new BitmapDrawable(alteredBitmap);
edit_img.setBackgroundDrawable(drawable);
} catch (Exception e) {
Log.v("ERROR", e.toString());
}
edit_img.setOnTouchListener(this);
setfunction();
}
private void setfunction()
{
Button done_btn=(Button)findViewById(R.id.done);
done_btn.setVisibility(View.VISIBLE);
done_btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String root = Environment.getExternalStorageDirectory().toString();
// File myDir = new File(root + "/saved_image);
String imagename = "Image.png";
File file = new File (root, imagename);
if (file.exists()) file.delete();
try {
FileOutputStream out = new FileOutputStream(file);
alteredBitmap.compress(Bitmap.CompressFormat.PNG, 90, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
Intent intent=new Intent(EditImage2.this,SaveImage.class);
intent.putExtra("imagepath",alteredBitmap);
startActivity(intent);
}
});
Button erase_btn=(Button)findViewById(R.id.erase);
erase_btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
canvas.drawColor(0, Mode.CLEAR);
canvas.drawBitmap(bitmap,matrix, paint);
}
});
}
public boolean onTouch(View v, MotionEvent event) {
if(event.getPointerCount()>1)
{
edit_img.setMaxZoom(4f);
}
else
{
int action = event.getAction();
switch (action) {
case MotionEvent.ACTION_DOWN:
downx = event.getX();
downy = event.getY();
Log.i("touch points x,y",downx+"/"+downy);
break;
case MotionEvent.ACTION_MOVE:
upx = event.getX();
upy = event.getY();
Log.i("touch points upx,upy",upx+"/"+upy);
canvas.drawLine(downx, downy, upx, upy, paint);
downx = upx;
downy = upy;
Log.i("touch points x,y",downx+"/"+downy);
//edit_img.invalidate();
v.invalidate();
break;
case MotionEvent.ACTION_UP:
upx = event.getX();
upy = event.getY();
break;
case MotionEvent.ACTION_CANCEL:
break;
default:
break;
}
}
return true;
}
}
viel dank für die antwort, aber ich bekomme nicht, wie man leinwand absolute position bekommen kann können sie diesen point bitte ich bin neu in android .. –