Android set height and width of Custom view progra

问题:

I have created a custom view named Graphview . Here is the structure for the GraphView class.

public class GraphView extends View {

    public GraphView(Context context, float[] values, String title, String[] horlabels, String[] verlabels, boolean type) {
        super(context);
                ........
   }

   ..................
   .................
}

I have added the view in a tablerow using addview(). It is working fine. Now I want to set height and width for the GraphView. How to do that?

回答1:

The easy way is to set the size programatically like that :

graphView.setLayoutParams(new LayoutParams(width, height));

This is fine if you know the exact size of the view. However, if you want a more flexible approach, you can override the onMeasure() method to measure the view more precisely depending on the space available and layout constraints (wrap_content, match_parent, or a fixed size).

You can find an example on how to override onMeasure() by looking at the android docs and the LabelView sample in your SDK directory.

回答2:

You can set height and width like this:

myGraphView.setLayoutParams(new LayoutParams(width, height));

回答3:

you can set the height and width of a view in a relative layout like this

ViewGroup.LayoutParams params = view.getLayoutParams();
params.height = 130;
view.setLayoutParams(params);

回答4:

spin12.setLayoutParams(new LinearLayout.LayoutParams(200, 120));

spin12 is your spinner and 200,120 is width and height for your spinner.

回答5:

This is a Kotlin based version, assuming that the parent view is an instance of LinearLayout.

someView.layoutParams = LinearLayout.LayoutParams(100, 200)

This allows to set the width and height (100 and 200) in a single line.