android - How to calculate and set Height correctly in onMeasure -


i have custom view, xml:

<merge xmlns:android="http://schemas.android.com/apk/res/android"        xmlns:app="http://schemas.android.com/apk/res-auto">      <edittext         android:id="@+id/post_edit_text"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:hint="@string/post_et_hint"         android:background="@android:color/transparent"         android:inputtype="text|textmultiline|textcapsentences|textnosuggestions"         android:gravity="center"         android:textsize="@dimen/post_et_text_size"         android:textstyle="bold"         android:layout_marginleft="@dimen/post_et_horizontal_margin"         android:layout_marginright="@dimen/post_et_horizontal_margin"         android:elevation="2dp"         app:layout_constrainttop_totopof="parent"         app:layout_constraintright_torightof="parent"         app:layout_constraintbottom_tobottomof="parent"         app:layout_constraintleft_toleftof="parent"         />      <imageview         android:id="@+id/image_view_top"         android:layout_width="match_parent"         android:layout_height="wrap_content"         app:layout_constrainttop_totopof="parent"         app:layout_constraintleft_toleftof="parent"         app:layout_constraintright_torightof="parent"         />      <imageview         android:id="@+id/image_view_mid"         android:layout_width="match_parent"         android:layout_height="match_parent"         app:layout_constraintleft_toleftof="parent"         app:layout_constraintright_torightof="parent"         app:layout_constraintbottom_totopof="parent"         app:layout_constraintbottom_tobottomof="parent"         />      <imageview         android:id="@+id/image_view_bot"         android:layout_width="match_parent"         android:layout_height="wrap_content"         app:layout_constraintright_torightof="parent"         app:layout_constraintleft_toleftof="parent"         app:layout_constraintbottom_tobottomof="parent"         />  </merge>

and source code (only part):

public class customimageview extends constraintlayout {      //...       @override     protected void onmeasure(final int widthmeasurespec, final int heightmeasurespec) {         int overheight = calculaterest();         int overwidth = calculatewidth();          if (mmode == postpresenter.mode.post) {             super.onmeasure(widthmeasurespec, widthmeasurespec);             timber.i("onmeasure h %d, w %d", overheight, overwidth);              if (overwidth > overheight) {                 timber.i("onmeasure not");                 setmeasureddimension(overwidth, overheight);             } else if (overwidth <= overheight) {                 timber.i("onmeasure square");                 setmeasureddimension(overwidth, overwidth);             }         } else {             super.onmeasure(widthmeasurespec, heightmeasurespec);         }     }      private int calculatewidth() {         return ((constraintlayout) getparent()).getwidth();     }      private int calculaterest() {         int overheight = 0;         overheight += ((constraintlayout) getparent()).getheight();         (int = 0; < ((constraintlayout) getparent()).getchildcount(); i++) {             int minusheight = 0;             if (((constraintlayout) getparent()).getchildat(i) instanceof tablayout) {                 minusheight = (((constraintlayout) getparent()).getchildat(i)).getheight();                 overheight -= minusheight;             } else if (((constraintlayout) getparent()).getchildat(i) instanceof bottombar) {                 minusheight = ((constraintlayout) getparent()).getchildat(i).getheight();                 overheight -= minusheight;             }         }          return overheight;     }      //... }

and need when closed keyboard displayed square (the place enough) , when keyboard open rectangle not square not enough space (as can see in method calculaterest remove height of 2 elements displayed).

but have next problem: edittext view showing appears off-center after open keyboard, this: enter image description here

and if chow image image not scaling new center too. how make onmeasure correctly, or need add in xml, inject view? :

?xml version="1.0" encoding="utf-8"?> <android.support.constraint.constraintlayout     xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     xmlns:app="http://schemas.android.com/apk/res-auto">      <android.support.design.widget.tablayout         android:id="@+id/post_tab_layout"         android:layout_width="0dp"         android:layout_height="wrap_content"         android:layout_marginleft="92dp"         android:layout_marginright="92dp"         app:tabmode="fixed"         android:scaley="-1"         android:elevation="2dp"         app:tabtextcolor="@color/post_tab_not_selected_text"         app:tabselectedtextcolor="@color/post_tab_selected_text"         app:layout_constrainttop_totopof="parent"         app:layout_constraintleft_toleftof="parent"         app:layout_constraintright_torightof="parent">          <android.support.design.widget.tabitem             android:id="@+id/post_tab_item_post"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:text="@string/tab_post"/>          <android.support.design.widget.tabitem             android:id="@+id/post_tab_item_history"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:text="@string/tab_history"/>      </android.support.design.widget.tablayout>      <imagebutton         android:id="@+id/post_toolbar_left_button"         android:src="@drawable/ic_toolbar_font"         android:elevation="2dp"         style="@style/imagebuttontoolbar"         app:layout_constrainttop_totopof="parent"         app:layout_constraintleft_toleftof="parent"         />      <imagebutton         android:id="@+id/post_toolbar_right_button"         android:src="@drawable/ic_toolbar_sticker"         android:elevation="2dp"         style="@style/imagebuttontoolbar"         app:layout_constraintright_torightof="parent"         app:layout_constrainttop_totopof="parent"         />      <view         android:id="@+id/post_devider_top"         android:layout_width="match_parent"         android:layout_height="@dimen/post_view_devider_height"         android:elevation="2dp"         android:background="@color/black_with_big_transperent"         app:layout_constrainttop_tobottomof="@id/post_tab_layout"         app:layout_constraintleft_toleftof="parent"         app:layout_constraintright_torightof="parent"/>      <com.ng.app.ui.view.customimageview         android:id="@+id/post_image_view"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:scaletype="centercrop"         app:layout_constraintright_torightof="parent"         app:layout_constraintleft_toleftof="parent"         app:layout_constrainttop_tobottomof="@id/post_devider_top"         app:layout_constraintbottom_totopof="@id/post_bottom_bar"/>      <com.ng.app.ui.view.bottombar         android:id="@+id/post_bottom_bar"         android:layout_width="match_parent"         android:layout_height="@dimen/bottom_bar_height"         android:elevation="2dp"         app:layout_constraintbottom_tobottomof="parent"         app:layout_constraintleft_toleftof="parent"         app:layout_constraintright_torightof="parent"         />  </android.support.constraint.constraintlayout>


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