Android définit la hauteur et la largeur de la vue personnalisée de manière programmatique

Question

J'ai créé une vue personnalisée nommée Graphview . Voici la structure de la classe GraphView.

public class GraphView extends View {

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

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

J'ai ajouté la vue dans une fenêtre à onglets en utilisant addview() . Il fonctionne correctement. Maintenant, je veux définir la hauteur et la largeur de l'élément GraphView . Comment faire ?

Answer 1

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

spin12 est l'outil d'essorage et 200 , 120 es width y height pour votre spinner .

Answer 2

Il s'agit d'une version basée sur Kotlin, qui suppose que la vue parentale est une instance de LinearLayout .

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

Cela permet de définir la largeur et la hauteur ( 100 y 200 ) en une seule ligne.

Answer 3

Complément à la solution de @MorganWilde. Vous pouvez utiliser le code suivant si vous voulez utiliser WRAP_CONTENT/MATCH_PARENT.

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

Answer 4

Exemple typique du monde réel :

dans un 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. inutile à moins d'utiliser la conversion DIP
2. Cela se produit généralement par fragments, remarquez getActivity()
3. il s'agit généralement d'en ajouter quelques-uns dans un schéma linéaire ou similaire
4. En général, l'une des dimensions est le "remplissage du parent"
5. vous devez utiliser le "bon" LayoutParams (ie, LinearLayout.LayoutParams dans l'exemple

Answer 5

Cette classe prend en charge tout ce dont vous avez besoin pour travailler avec les vues de manière programmatique

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));
}

}

et vous pouvez l'utiliser comme suit :

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