<?xml version="1.0" encoding="utf-8"?>
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<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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xmlns:app="http://schemas.android.com/apk/res-auto">
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<com.google.android.material.floatingactionbutton.FloatingActionButton
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android:id="@+id/floating"
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android:layout_width="40dp"
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android:layout_height="wrap_content"
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android:alpha="0.9"
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app:layout_constraintTop_toTopOf="parent"
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app:layout_constraintLeft_toLeftOf="parent" />
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<com.google.android.material.button.MaterialButton
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android:id="@+id/btn_back"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:text="后退"
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android:textColor="@color/black"
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android:alpha="0.2"
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app:layout_constraintBottom_toBottomOf="parent"
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app:layout_constraintLeft_toLeftOf="parent"/>
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<com.google.android.material.button.MaterialButton
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android:id="@+id/btn_pause"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:text="暂停"
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android:textColor="@color/black"
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android:alpha="0.2"
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app:layout_constraintBottom_toBottomOf="parent"
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app:layout_constraintLeft_toRightOf="@id/btn_back"
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app:layout_constraintRight_toLeftOf="@id/btn_fast"/>
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<com.google.android.material.button.MaterialButton
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android:id="@+id/btn_fast"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:text="快进"
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android:textColor="@color/black"
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android:alpha="0.2"
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app:layout_constraintBottom_toBottomOf="parent"
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app:layout_constraintRight_toRightOf="parent"/>
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</androidx.constraintlayout.widget.ConstraintLayout>
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