Вам необходимо использовать LinearLayout.LayoutParams
для LinearLayout, и вам необходимо использовать RelativeLayout.LayoutParams
для RelativeLayout, иначе вы столкнетесь. В то время как константы MATCH_PARENT
и WRAP_CONTENT
одинаковы, специфический PARAMS макета добавить дополнительную информацию к Params макета, например, в RelativeLayout
, то RelativeLayout.LayoutParams
хранит правила, которые определяют, как centerInParent
или below
или toRightOf
и т.д. Если вы дать ему LinearLayout.LayoutParams
, это просто сбой.
Например, это LinearLayout.LayoutParams
public static class LayoutParams extends ViewGroup.MarginLayoutParams {
@ViewDebug.ExportedProperty(category = "layout")
public float weight;
И это RelativeLayout.LayoutParams
public static class LayoutParams extends ViewGroup.MarginLayoutParams {
@ViewDebug.ExportedProperty(category = "layout", resolveId = true, indexMapping = {
@ViewDebug.IntToString(from = ABOVE, to = "above"),
@ViewDebug.IntToString(from = ALIGN_BASELINE, to = "alignBaseline"),
@ViewDebug.IntToString(from = ALIGN_BOTTOM, to = "alignBottom"),
@ViewDebug.IntToString(from = ALIGN_LEFT, to = "alignLeft"),
@ViewDebug.IntToString(from = ALIGN_PARENT_BOTTOM, to = "alignParentBottom"),
@ViewDebug.IntToString(from = ALIGN_PARENT_LEFT, to = "alignParentLeft"),
@ViewDebug.IntToString(from = ALIGN_PARENT_RIGHT, to = "alignParentRight"),
@ViewDebug.IntToString(from = ALIGN_PARENT_TOP, to = "alignParentTop"),
@ViewDebug.IntToString(from = ALIGN_RIGHT, to = "alignRight"),
@ViewDebug.IntToString(from = ALIGN_TOP, to = "alignTop"),
@ViewDebug.IntToString(from = BELOW, to = "below"),
@ViewDebug.IntToString(from = CENTER_HORIZONTAL, to = "centerHorizontal"),
@ViewDebug.IntToString(from = CENTER_IN_PARENT, to = "center"),
@ViewDebug.IntToString(from = CENTER_VERTICAL, to = "centerVertical"),
@ViewDebug.IntToString(from = LEFT_OF, to = "leftOf"),
@ViewDebug.IntToString(from = RIGHT_OF, to = "rightOf"),
@ViewDebug.IntToString(from = ALIGN_START, to = "alignStart"),
@ViewDebug.IntToString(from = ALIGN_END, to = "alignEnd"),
@ViewDebug.IntToString(from = ALIGN_PARENT_START, to = "alignParentStart"),
@ViewDebug.IntToString(from = ALIGN_PARENT_END, to = "alignParentEnd"),
@ViewDebug.IntToString(from = START_OF, to = "startOf"),
@ViewDebug.IntToString(from = END_OF, to = "endOf")
}, mapping = {
@ViewDebug.IntToString(from = TRUE, to = "true"),
@ViewDebug.IntToString(from = 0, to = "false/NO_ID")
})
private int[] mRules = new int[VERB_COUNT];
private int[] mInitialRules = new int[VERB_COUNT];
private int mLeft, mTop, mRight, mBottom;
private boolean mRulesChanged = false;
private boolean mIsRtlCompatibilityMode = false;
/**
* When true, uses the parent as the anchor if the anchor doesn't exist or if
* the anchor's visibility is GONE.
*/
@ViewDebug.ExportedProperty(category = "layout")
public boolean alignWithParent;
хорошо я понял, я запутался из-за этой линии, 'новые LayoutParams (ViewGroup.LayoutParams .WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); ', не заметил, что объект ViewGroup был только для констант – SadeepDarshana