ProgressBar未在布局中显示

时间：2018-04-03 21:35:09

标签： java android user-interface progress-bar

我试图实施旋转progressBar，但无论我尝试什么，它都不会出现。这是xml：

<android.support.v4.widget.DrawerLayout 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/drawer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/background"
tools:context="com.example.home.quoteapp.MainActivity">

<android.support.design.widget.AppBarLayout
    android:layout_width="match_parent"
    android:layout_height="70dp"
    android:background="@color/background">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:background="@drawable/rectangle">

        <RelativeLayout
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <Button
                android:id="@+id/search"
                android:layout_width="35dp"
                android:layout_height="35dp"
                android:layout_alignParentEnd="true"
                android:layout_marginEnd="10dp"
                android:layout_marginTop="18dp"
                android:background="@drawable/ic_search_black_24dp"
                android:clickable="true"
                android:focusable="true"
                android:gravity="center" />

            <Button
                android:id="@+id/back_arrow_search"
                android:layout_width="35dp"
                android:layout_height="35dp"
                android:layout_marginTop="18dp"
                android:background="@drawable/ic_arrow_back_black_24dp"
                android:clickable="true"
                android:focusable="true"
                android:visibility="invisible" />

            <Button
                android:id="@+id/nav_button"
                android:layout_width="35dp"
                android:layout_height="35dp"
                android:layout_marginTop="18dp"
                android:background="@drawable/ic_more_vert_black_24dp"
                android:clickable="true"
                android:focusable="true" />

            <EditText
                android:id="@+id/section"
                android:layout_width="230dp"
                android:layout_height="wrap_content"
                android:layout_centerVertical="true"
                android:layout_marginLeft="30dp"
                android:layout_toEndOf="@+id/nav_button"
                android:layout_toRightOf="@+id/nav_button"
                android:background="@android:color/transparent"
                android:clickable="false"
                android:ems="10"
                android:focusable="false"
                android:gravity="left"
                android:inputType="textMultiLine|textNoSuggestions"
                android:maxHeight="140dp"
                android:scrollbars="vertical"
                android:text="@string/section"
                android:textColor="@color/textColor"
                android:textSize="20sp" />

            <EditText
                android:id="@+id/searchText"
                android:layout_width="230dp"
                android:layout_height="wrap_content"
                android:layout_alignBaseline="@+id/section"
                android:layout_alignBottom="@+id/section"
                android:layout_alignStart="@+id/section"
                android:background="@drawable/underline"
                android:ems="10"
                android:hint="Search"
                android:imeOptions="actionSearch"
                android:inputType="textMultiLine|textNoSuggestions|text"
                android:maxHeight="140dp"
                android:textColor="@color/textColor"
                android:textColorHint="@color/textHint"
                android:textCursorDrawable="@null"
                android:textSize="20sp"
                android:visibility="invisible" />
        </RelativeLayout>
    </android.support.v7.widget.Toolbar>

    <RelativeLayout
        android:id="@+id/progressBarLayout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <ProgressBar
            android:id="@+id/progressBar"
            style="?android:attr/progressBarStyle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_centerHorizontal="true"
            android:layout_centerVertical="true"
            android:visibility="visible" />
    </RelativeLayout>

    <GridView
        android:id="@+id/gridView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginBottom="5dp"
        android:layout_marginEnd="5dp"
        android:layout_marginStart="5dp"
        android:layout_marginTop="5dp"
        android:alwaysDrawnWithCache="true"
        android:clipChildren="true"
        android:columnWidth="90dp"
        android:gravity="center"
        android:horizontalSpacing="5dp"
        android:numColumns="auto_fit"
        android:padding="0dp"
        android:scrollingCache="true"
        android:smoothScrollbar="true"
        android:stretchMode="columnWidth"
        android:verticalSpacing="5dp"></GridView>

</android.support.design.widget.AppBarLayout>


<android.support.design.widget.NavigationView
    android:id="@+id/navView"
    android:layout_width="200dp"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:background="@color/headerColour"
    android:theme="@style/NavigationTheme"
    android:visibility="invisible"
    app:itemBackground="@drawable/nav_item_background"
    app:itemTextColor="@color/headerColourAccent"
    app:menu="@menu/menu">


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:layout_alignParentEnd="true"
        android:layout_alignParentTop="true"
        android:background="@color/headerColourAccent">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_gravity="left"
            android:gravity="left"
            android:paddingLeft="15dp"
            android:paddingTop="15dp"
            android:text="Sections"
            android:textColor="@color/headerColour"
            android:textSize="30dp" />

    </LinearLayout>
</android.support.design.widget.NavigationView>


</android.support.v4.widget.DrawerLayout>

这就是我在MainActivity的{​​{1}}中所说的。

progressBar

然后我会通过这样做来使private RelativeLayout progressBarLayout; private ProgressBar progressBar protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); this.requestWindowFeature(Window.FEATURE_NO_TITLE); this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.activity_main); progressBarLayout = findViewById(R.id.progressBarLayout); progressBar = findViewById(R.id.progressBar); progressBar.getIndeterminateDrawable().setColorFilter(0xF09D00, PorterDuff.Mode.MULTIPLY); } 消失

progressBar

但progressBarLayout.setVisibility(View.GONE); 从未显示过，当我将progressBar设置为可见性时，它会消失。

2 个答案:

答案 0 :(得分：2)

问题出在您的布局层次结构中。我做了一些改变。 根目录为RelativeLayout，其中包含DrawerLayout，Progressbar已移除DrawerLayout之外，现在位于DrawerLayout下方的根布局内。另外AppBarLayout占据了整个屏幕的宽度和高度，我猜这不是你想要的，所以它改为了，因为它阻挡了它下面的其他视图

这是一个工作布局：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">

<android.support.v4.widget.DrawerLayout
    android:id="@+id/drawer"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <!--Drawer related content below here-->

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <RelativeLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:gravity="top">

                <Button
                    android:id="@+id/search"
                    android:layout_width="35dp"
                    android:layout_height="35dp"
                    android:layout_alignParentEnd="true"
                    android:layout_marginEnd="10dp"
                    android:layout_marginTop="18dp"
                    android:clickable="true"
                    android:focusable="true"
                    android:gravity="center" />

                <Button
                    android:id="@+id/back_arrow_search"
                    android:layout_width="35dp"
                    android:layout_height="35dp"
                    android:layout_marginTop="18dp"
                    android:clickable="true"
                    android:focusable="true"
                    android:visibility="invisible" />

                <Button
                    android:id="@+id/nav_button"
                    android:layout_width="35dp"
                    android:layout_height="35dp"
                    android:layout_marginTop="18dp"
                    android:clickable="true"
                    android:focusable="true" />

                <EditText
                    android:id="@+id/section"
                    android:layout_width="230dp"
                    android:layout_height="wrap_content"
                    android:layout_centerVertical="true"
                    android:layout_marginLeft="30dp"
                    android:layout_toEndOf="@+id/nav_button"
                    android:layout_toRightOf="@+id/nav_button"
                    android:background="@android:color/transparent"
                    android:clickable="false"
                    android:ems="10"
                    android:focusable="false"
                    android:gravity="left"
                    android:inputType="textMultiLine|textNoSuggestions"
                    android:maxHeight="140dp"
                    android:scrollbars="vertical"
                    android:textSize="20sp" />

                <EditText
                    android:id="@+id/searchText"
                    android:layout_width="230dp"
                    android:layout_height="wrap_content"
                    android:layout_alignBaseline="@+id/section"
                    android:layout_alignBottom="@+id/section"
                    android:layout_alignStart="@+id/section"
                    android:ems="10"
                    android:hint="Search"
                    android:imeOptions="actionSearch"
                    android:inputType="textMultiLine|textNoSuggestions|text"
                    android:maxHeight="140dp"
                    android:textCursorDrawable="@null"
                    android:textSize="20sp"
                    android:visibility="invisible" />
            </RelativeLayout>
        </android.support.v7.widget.Toolbar>
    </android.support.design.widget.AppBarLayout>


    <FrameLayout
        android:id="@+id/progressBarLayout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <GridView
            android:id="@+id/gridView"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginBottom="5dp"
            android:layout_marginEnd="5dp"
            android:layout_marginStart="5dp"
            android:layout_marginTop="5dp"
            android:alwaysDrawnWithCache="true"
            android:clipChildren="true"
            android:columnWidth="90dp"
            android:gravity="center"
            android:horizontalSpacing="5dp"
            android:numColumns="auto_fit"
            android:padding="0dp"
            android:scrollingCache="true"
            android:smoothScrollbar="true"
            android:stretchMode="columnWidth"
            android:verticalSpacing="5dp" />
    </FrameLayout>

    <android.support.design.widget.NavigationView
        android:id="@+id/navView"
        android:layout_width="200dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:visibility="invisible">


        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="70dp"
            android:layout_alignParentEnd="true"
            android:layout_alignParentTop="true">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_gravity="left"
                android:gravity="left"
                android:paddingLeft="15dp"
                android:paddingTop="15dp"
                android:text="Sections"
                android:textSize="30dp" />

        </LinearLayout>
    </android.support.design.widget.NavigationView>
</android.support.v4.widget.DrawerLayout>

<ProgressBar
    style="?android:attr/progressBarStyle"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true"
    android:layout_gravity="center"
    android:indeterminate="true" />

</RelativeLayout>

答案 1 :(得分：0)

在您的ProgressBar中添加这样的大小：

android:maxHeight="20dp"
android:maxWidth="20dp"
android:minHeight="20dp"
android:minWidth="20dp"
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