How do I draw my custom view which can become zoomable with the use of this library
package com.example.mindmapping;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import com.otaliastudios.zoom.ZoomLayout;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
MindMap map = new MindMap(this);
setContentView(R.layout.activity_main);
ZoomLayout zoomLayout = findViewById(R.id.zoomLayoutContainer);
zoomLayout.addView(map);
setContentView(map);
}
}
Where map is a Custom View , extends View & Overrides onDraw Method , It contains Other elements like TextElement & Other which are also custom views or extending from linear layout and contain a text view : Like This
package com.example.mindmapping;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.View;
import android.widget.Toast;
public class MindMap extends View {
private Context context;
private Canvas canvas;
private Paint brush;
//Canvas Variables
private float centerMarginX;
private float centerMarginY;
private float mWidth;
private float mHeight;
public MindMap(Context context) {
super(context);
this.context = context;
initSetup();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
this.canvas = canvas;
initDrawing();
}
public void initSetup() {
brush = new Paint(Paint.ANTI_ALIAS_FLAG);
}
public void initDrawing() {
brush.setStyle(Paint.Style.STROKE);
brush.setStrokeWidth(10);
brush.setColor(Color.parseColor("black"));
canvas.drawText("Helo ",50,50,brush);
mWidth = getMeasuredWidth();
mHeight = getMeasuredHeight();
centerMarginX = mWidth / 2;
centerMarginY = mHeight / 2;
TextElement textElement = new TextElement(context, "Main Topic");
textElement.setX(centerMarginX - (textElement.getLayoutWidth() / 2));
textElement.setY(centerMarginY - (textElement.getLayoutHeight() / 2));
textElement.draw(canvas);
TextElement textElement1 = new TextElement(context, "Another One");
textElement1.setX(textElement.getX() + textElement.getLayoutWidth() + 600);
textElement1.setY(textElement.getY() - textElement.getLayoutHeight());
textElement1.draw(canvas);
Toast.makeText(this.context,"Drawn",Toast.LENGTH_SHORT).show();
}
}
The custom view (map in this case) is not drawn in the ZoomLayout even though onDraw method is called but when I set map in setContentView instead of the layout file and don't use ZoomLayout , The Map is drawn on the canvas , I want to draw my custom view which should be zoomable with this library
1.8.0
Nothing is drawn on the canvas , not even that helo text , drawn in initDrawing()
that setContentView has been called again to set the map as a view as a test , it was a comment , removing it does't solve the problem
Your custom view may be drawn with 0 size. Try to debug your layout, either using the developer setting on the device/emulator, or through Android Studio's layout inspector.
Thanks !
I Needed to call setMeasuredDimension in overridden onMeasure , because this is a fully customized view , docs !
My issue has been solved.
Most helpful comment
Thanks !
I Needed to call setMeasuredDimension in overridden onMeasure , because this is a fully customized view , docs !
My issue has been solved.