Android set height and width of Custom view programmatically

I have created a custom view named Graphview . Here is the structure for the GraphView clas开发者_开发问答s.

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?

You can set height and width like this:

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

If you know the exact size of the view, just use setLayoutParams():

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

Or in Kotlin:

graphView.layoutParams = LayoutParams(width, height)

However, if you need a more flexible approach you can override onMeasure() 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 more details about onMeasure() in the android docs.

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);

On Kotlin you can set width and height of any view directly using their virtual properties:

someView.layoutParams.width = 100
someView.layoutParams.height = 200

If you're using Kotlin, you can also use the following code which applies your given lambda on the current layout params:

someView.updateLayoutParams {
    height = 200
}

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

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

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.

Adding on to the solution by @MorganWilde. You can use the following code if you want to use WRAP_CONTENT/MATCH_PARENT.

someView.layoutParams =
   LinearLayout.LayoutParams(
     ViewGroup.LayoutParams.MATCH_PARENT,
     ViewGroup.LayoutParams.WRAP_CONTENT)

Typical real-world example:

in a Fragment:

private LinearLayout images;
...

float dpf = TypedValue.applyDimension(
  TypedValue.COMPLEX_UNIT_DIP, 69, getResources().getDisplayMetrics());

    for (int i = 0; i < 10; i++) {
        SpecialImage s = new SpecialImage(getActivity());
        images.addView(s);
        s.setLayoutParams(new LinearLayout.LayoutParams(
         (int) dpf, LinearLayout.LayoutParams.MATCH_PARENT));
    }

1. useless unless use DIP conversion
2. this usually happens in fragments, notice getActivity()
3. you're usually adding a few into a linear layout or similar
4. typically one dimension is "fill parent"
5. you must use the "correct" LayoutParams (ie, LinearLayout.LayoutParams in the example

here this class take care of everything you need for working with views programmatically

public class LayoutHelper {

public static final int MATCH_PARENT = -1;
public static final int WRAP_CONTENT = -2;

private static int getSize(float size) {
    return (int) (size < 0 ? size : AndroidUtilities.dp(size));
}

public static ScrollView.LayoutParams createScroll(int width, int height, int gravity) {
    return new ScrollView.LayoutParams(getSize(width), getSize(height), gravity);
}

public static ScrollView.LayoutParams createScroll(int width, int height, int gravity, float leftMargin, float topMargin, float rightMargin, float bottomMargin) {
    ScrollView.LayoutParams layoutParams = new ScrollView.LayoutParams(getSize(width), getSize(height), gravity);
    layoutParams.leftMargin = AndroidUtilities.dp(leftMargin);
    layoutParams.topMargin = AndroidUtilities.dp(topMargin);
    layoutParams.rightMargin = AndroidUtilities.dp(rightMargin);
    layoutParams.bottomMargin = AndroidUtilities.dp(bottomMargin);
    return layoutParams;
}

public static FrameLayout.LayoutParams createFrame(int width, float height, int gravity, float leftMargin, float topMargin, float rightMargin, float bottomMargin) {
    FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(getSize(width), getSize(height), gravity);
    layoutParams.setMargins(AndroidUtilities.dp(leftMargin), AndroidUtilities.dp(topMargin), AndroidUtilities.dp(rightMargin), AndroidUtilities.dp(bottomMargin));
    return layoutParams;
}

public static FrameLayout.LayoutParams createFrame(int width, int height, int gravity) {
    return new FrameLayout.LayoutParams(getSize(width), getSize(height), gravity);
}

public static FrameLayout.LayoutParams createFrame(int width, float height) {
    return new FrameLayout.LayoutParams(getSize(width), getSize(height));
}

public static RelativeLayout.LayoutParams createRelative(float width, float height, int leftMargin, int topMargin, int rightMargin, int bottomMargin, int alignParent, int alignRelative, int anchorRelative) {
    RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(getSize(width), getSize(height));
    if (alignParent >= 0) {
        layoutParams.addRule(alignParent);
    }
    if (alignRelative >= 0 && anchorRelative >= 0) {
        layoutParams.addRule(alignRelative, anchorRelative);
    }
    layoutParams.leftMargin = AndroidUtilities.dp(leftMargin);
    layoutParams.topMargin = AndroidUtilities.dp(topMargin);
    layoutParams.rightMargin = AndroidUtilities.dp(rightMargin);
    layoutParams.bottomMargin = AndroidUtilities.dp(bottomMargin);
    return layoutParams;
}

public static RelativeLayout.LayoutParams createRelative(int width, int height, int leftMargin, int topMargin, int rightMargin, int bottomMargin) {
    return createRelative(width, height, leftMargin, topMargin, rightMargin, bottomMargin, -1, -1, -1);
}

public static RelativeLayout.LayoutParams createRelative(int width, int height, int leftMargin, int topMargin, int rightMargin, int bottomMargin, int alignParent) {
    return createRelative(width, height, leftMargin, topMargin, rightMargin, bottomMargin, alignParent, -1, -1);
}

public static RelativeLayout.LayoutParams createRelative(float width, float height, int leftMargin, int topMargin, int rightMargin, int bottomMargin, int alignRelative, int anchorRelative) {
    return createRelative(width, height, leftMargin, topMargin, rightMargin, bottomMargin, -1, alignRelative, anchorRelative);
}

public static RelativeLayout.LayoutParams createRelative(int width, int height, int alignParent, int alignRelative, int anchorRelative) {
    return createRelative(width, height, 0, 0, 0, 0, alignParent, alignRelative, anchorRelative);
}

public static RelativeLayout.LayoutParams createRelative(int width, int height) {
    return createRelative(width, height, 0, 0, 0, 0, -1, -1, -1);
}

public static RelativeLayout.LayoutParams createRelative(int width, int height, int alignParent) {
    return createRelative(width, height, 0, 0, 0, 0, alignParent, -1, -1);
}

public static RelativeLayout.LayoutParams createRelative(int width, int height, int alignRelative, int anchorRelative) {
    return createRelative(width, height, 0, 0, 0, 0, -1, alignRelative, anchorRelative);
}

public static LinearLayout.LayoutParams createLinear(int width, int height, float weight, int gravity, int leftMargin, int topMargin, int rightMargin, int bottomMargin) {
    LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(getSize(width), getSize(height), weight);
    layoutParams.setMargins(AndroidUtilities.dp(leftMargin), AndroidUtilities.dp(topMargin), AndroidUtilities.dp(rightMargin), AndroidUtilities.dp(bottomMargin));
    layoutParams.gravity = gravity;
    return layoutParams;
}

public static LinearLayout.LayoutParams createLinear(int width, int height, float weight, int leftMargin, int topMargin, int rightMargin, int bottomMargin) {
    LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(getSize(width), getSize(height), weight);
    layoutParams.setMargins(AndroidUtilities.dp(leftMargin), AndroidUtilities.dp(topMargin), AndroidUtilities.dp(rightMargin), AndroidUtilities.dp(bottomMargin));
    return layoutParams;
}

public static LinearLayout.LayoutParams createLinear(int width, int height, int gravity, int leftMargin, int topMargin, int rightMargin, int bottomMargin) {
    LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(getSize(width), getSize(height));
    layoutParams.setMargins(AndroidUtilities.dp(leftMargin), AndroidUtilities.dp(topMargin), AndroidUtilities.dp(rightMargin), AndroidUtilities.dp(bottomMargin));
    layoutParams.gravity = gravity;
    return layoutParams;
}

public static LinearLayout.LayoutParams createLinear(int width, int height, float leftMargin, float topMargin, float rightMargin, float bottomMargin) {
    LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(getSize(width), getSize(height));
    layoutParams.setMargins(AndroidUtilities.dp(leftMargin), AndroidUtilities.dp(topMargin), AndroidUtilities.dp(rightMargin), AndroidUtilities.dp(bottomMargin));
    return layoutParams;
}

public static LinearLayout.LayoutParams createLinear(int width, int height, float weight, int gravity) {
    LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(getSize(width), getSize(height), weight);
    layoutParams.gravity = gravity;
    return layoutParams;
}

public static LinearLayout.LayoutParams createLinear(int width, int height, int gravity) {
    LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(getSize(width), getSize(height));
    layoutParams.gravity = gravity;
    return layoutParams;
}

public static LinearLayout.LayoutParams createLinear(int width, int height, float weight) {
    return new LinearLayout.LayoutParams(getSize(width), getSize(height), weight);
}

public static LinearLayout.LayoutParams createLinear(int width, int height) {
    return new LinearLayout.LayoutParams(getSize(width), getSize(height));
}

}

and you can use it like this:

        frameLayout.addView(
        emptyLayout,
        LayoutHelper.createFrame(
            LayoutHelper.MATCH_PARENT,
            LayoutHelper.WRAP_CONTENT,
            Gravity.CENTER
        )
    );