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?

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You can set height and width like this:

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

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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.

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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);

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

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

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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
}

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

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

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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.

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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

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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
        )
    );