setTranslation is not working on onCreate()

Question

setTranslationY() does not execute translation on a layout in onCreate(), while it's got no problem when used in a setonTouchListener or setOnClickListener.

I've also tried animate().translationY(). However the same exact problem appears. I've tried to present the parts of my code in need to make the issue more clear. A layout is included in the activity. This layout contains another layout which it's height is used in translation measures.

Java codes:

View mainMenuIncluded, mainMenu ;
mainMenuIncluded = findViewById(R.id.main_menu_included);
mainMenu = mainMenuIncluded.findViewById(R.id.main_menu);
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_pick_singer_list);
        mainMenuIncluded.setTranslationY(mainMenuIncluded.getY()-mainMenu.getHeight());
    }

The related xml part of the activity:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".activity">
<include
            layout="@layout/layout_pick_main_menu"
            android:id="@+id/main_menu_included"/>

    </android.support.constraint.ConstraintLayout>

The xml of the included layout (containig mainMenu):

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/main_menu_layout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="0dp">
<android.support.constraint.ConstraintLayout
        android:id="@+id/main_menu_main"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="0dp"
        android:layout_marginBottom="0dp"
        android:background="@drawable/menu_gradient_background"
        app:layout_constraintBottom_toTopOf="@id/main_menu_button"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <android.support.constraint.ConstraintLayout
            android:id="@+id/main_menu"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="0dp"
            android:layout_marginBottom="0dp"
            android:background="@drawable/menu_gradient_background"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            >
        </android.support.constraint.ConstraintLayout>

    </android.support.constraint.ConstraintLayout>

</android.support.constraint.ConstraintLayout>

@ShaluTD codes added . . . – elyar abad Aug 13 '19 at 13:58 — elyar abad, Aug 13 '19 at 13:58

Peter Staranchuk · Accepted Answer · 2019-08-13T15:34:56.860

2

You can animate and move view only when it already drawn and measured. Use:

Kotlin version:

yourView.post { 
    yourView.animate().translationY(/*value*/)            
}

Java version:

yourView.post(new Runnable() {
    @Override
    public void run() {
        yourView.animate().translationY(/*value*/);
    }
};

for this

edited Aug 13 '19 at 15:34

answered Aug 13 '19 at 13:51

Peter Staranchuk

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Yes. This was code from Kotlin. I add code in Java in answer. Please check – Peter Staranchuk Aug 13 '19 at 14:05
Nice to hear that :) – Peter Staranchuk Aug 13 '19 at 14:43
Thanks anyway! Could you explain why `post(Runnable runnable){}` is needed, please? – elyar abad Aug 14 '19 at 05:52
1

when you call view.post it causes the Runnable (body of lambda in case of Kotlin) to be added to the message queue (on the thread to which this handler is attached). When this runnable will be enqued, your view will be already drawn and measured. Try to see views width, height, left, right in onCreate during debug – Peter Staranchuk Aug 14 '19 at 06:14

score 1 · Answer 2 · answered Nov 07 '19 at 21:40

Just replace this part:

mainMenuIncluded.setTranslationY(mainMenuIncluded.getY()-mainMenu.getHeight());

with:

mainMenuIncluded.post(new Runnable() {
    @Override
    public void run() {
        mainMenuIncluded.setTranslationY(mainMenuIncluded.getY() - mainMenu.getHeight());
    }
};

setTranslation is not working on onCreate()

2 Answers2