Guten Mittag,
vielen Dank für die schnelle Antwort. Im Folgenden die Layout Datei:
<?xml version="1.0" encoding="utf-8"?>
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<Button
android:id="@+id/btn_start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="64dp"
android:layout_marginBottom="116dp"
android:background="@color/colorPrimaryDark"
android:onClick="start"
android:text="Start"
android:textAlignment="center"
android:textColor="@android:color/background_dark"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="@+id/tv_anz"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="72dp"
android:layout_marginEnd="8dp"
android:text="Schätze 8 Sekunden!
Je näher du kommst, desto
mehr Punkte gibt es!"
android:textAlignment="center"
android:textColor="@android:color/background_dark"
android:textSize="24sp"
android:textStyle="bold"
android:visibility="visible"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/btn_stop"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="116dp"
android:background="@color/colorPrimaryDark"
android:onClick="pause"
android:text="Stop"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.546"
app:layout_constraintStart_toEndOf="@+id/btn_start" />
<TextView
android:id="@+id/tv_timer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:text="00:00:00"
android:textColor="@color/colorPrimaryDark"
android:textSize="80dp"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.502"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/btn_next"
android:layout_width="50"
android:layout_height="50"
android:layout_marginEnd="13dp"
android:layout_marginBottom="8dp"
android:background="?android:attr/homeAsUpIndicator"
android:onClick="next"
android:rotation="180"
android:textAllCaps="true"
android:textStyle="bold"
android:visibility="invisible"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
Vielen Dank im Voraus
MfG
Milos