<?xml version="1.0" encoding="utf-8"?>
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<android.support.constraint.ConstraintLayout
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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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<ProgressBar
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android:id="@+id/view_waiting"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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app:layout_constraintTop_toTopOf="parent"
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app:layout_constraintBottom_toBottomOf="parent"
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app:layout_constraintStart_toStartOf="parent"
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app:layout_constraintEnd_toEndOf="parent"
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app:layout_constraintVertical_bias="0.2" />
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<TextView
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android:id="@+id/tv_no_data"
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app:layout_constraintTop_toBottomOf="@id/view_waiting"
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android:layout_width="match_parent"
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android:layout_height="wrap_content"
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android:text="加载中..."
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android:gravity="center"
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android:textColor="@color/gray"
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android:visibility="visible"/>
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</android.support.constraint.ConstraintLayout>
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