Question

我想为FragView中的TextView设置一些文本。在给布局膨胀之后，我使用#findViewById（int）检索TextView对象，然后调用它的#setText（String）。但是，它不起作用。

这就是我的代码现在的样子：

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
  // Inflate the layout for this fragment
  View V = inflater.inflate(R.layout.quantityfragment, container, false);
  TextView tvpurchasedunits = (TextView) V.findViewById(R.id.tvpurchasedunits);
  tvpurchasedunits.setText("units");
  return V;
}

这是我的xml代码

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/add_quantityfragment_svquantity"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
>

        <Spinner
                    android:id="@+id/spinner1"
                    android:layout_width="fill_parent"
                    android:layout_height="50dp"
                    android:visibility="gone" />

        <LinearLayout
            style="@style/ff"
            android:layout_marginTop="10dp"
            android:orientation="horizontal" >

            <RelativeLayout
                style="@style/fw"
                android:layout_weight="1"
                android:background="#8BC34A"
                android:orientation="vertical"
                android:paddingBottom="20dp" >

                <TextView
                    android:id="@+id/add_quantityfragment_tvpurchasedquantity"
                    style="@style/text_view_body"
                    android:layout_width="fill_parent"
                    android:layout_marginTop="30dp"
                    android:gravity="center"
                    android:text="Bought"
                    android:textColor="#FFFFFF"
                    android:textSize="16dp" />

                <EditText
                    android:id="@+id/add_quantityfragment_etpurchasedquantity"
                    style="@style/edittext"
                    android:layout_width="fill_parent"
                    android:layout_below="@+id/add_quantityfragment_tvpurchasedquantity"
                    android:layout_marginLeft="10dp"
                    android:layout_marginRight="10dp"
                    android:layout_marginTop="30dp"
                    android:background="@drawable/layout_border2"
                    android:digits="0123456789."
                    android:inputType="numberDecimal"
                    android:singleLine="true" />

                <TextView
                    android:id="@+id/tvpurchasedunits"
                    style="@style/text_view_body"
                    android:layout_width="fill_parent"
                    android:layout_below="@+id/add_quantityfragment_etpurchasedquantity"
                    android:layout_marginRight="10dp"
                    android:layout_marginTop="5dp"
                    android:gravity="right"
                    android:text=""
                    android:textColor="#FFFFFF"
                    android:textSize="16dp" />

                <EditText
                    android:id="@+id/add_quantityfragment_etexpirydate"
                    style="@style/edittext"
                    android:layout_width="fill_parent"
                    android:layout_above="@+id/add_quantityfragment_tvcleardate"
                    android:layout_marginBottom="5dp"
                    android:layout_marginLeft="10dp"
                    android:layout_marginRight="10dp"
                    android:layout_marginTop="5dp"
                    android:background="@drawable/layout_border2"
                    android:focusable="false"
                    android:hint="Expiry Date"
                    android:inputType="date"
                    android:singleLine="true"
                    android:textSize="12dp" />

                <TextView
                    android:id="@+id/add_quantityfragment_tvcleardate"
                    style="@style/text_view_body"
                    android:layout_width="fill_parent"
                    android:layout_alignParentBottom="true"
                    android:layout_marginRight="10dp"
                    android:gravity="right"
                    android:text="@string/clear"
                    android:textColor="#FFFFFF" />
            </RelativeLayout>

            <View
                android:layout_width="5dp"
                android:layout_height="match_parent"
                android:background="#EEEEEE" />

            <LinearLayout
                style="@style/ff"
                android:layout_weight="1"
                android:orientation="vertical" >

                <RelativeLayout
                    style="@style/ff"
                    android:layout_weight="1"
                    android:background="#FF5722"
                    android:orientation="vertical" >

                    <TextView
                        android:id="@+id/add_quantityfragment_tvusedquantity"
                        style="@style/text_view_body"
                        android:layout_width="fill_parent"
                        android:layout_marginTop="10dp"
                        android:gravity="center"
                        android:text="Used"
                        android:textColor="#FFFFFF"
                        android:textSize="16dp" />

                    <EditText
                        android:id="@+id/add_quantityfragment_etusedquantity"
                        style="@style/edittext"
                        android:layout_width="fill_parent"
                        android:layout_centerVertical="true"
                        android:layout_marginLeft="10dp"
                        android:layout_marginRight="10dp"
                        android:background="@drawable/layout_border2"
                        android:digits="0123456789."
                        android:inputType="numberDecimal"
                        android:singleLine="true" />

                    <TextView
                        android:id="@+id/add_quantityfragment_tvusedunits"
                        style="@style/text_view_body"
                        android:layout_width="fill_parent"
                        android:layout_below="@+id/add_quantityfragment_etusedquantity"
                        android:layout_marginRight="10dp"
                        android:layout_marginTop="5dp"
                        android:gravity="right"
                        android:text=""
                        android:textColor="#FFFFFF"
                        android:textSize="16dp" />
                </RelativeLayout>

                <TextView
                    android:id="@+id/add_quantityfragment_tvor"
                    style="@style/text_view_body"
                    android:layout_width="fill_parent"
                    android:gravity="center"
                    android:minHeight="40dp"
                    android:text="{Or}" />

                <RelativeLayout
                    style="@style/ff"
                    android:layout_weight="1"
                    android:background="#3F51B5"
                    android:orientation="vertical" >

                    <TextView
                        android:id="@+id/add_quantityfragment_tvremainingquantity"
                        style="@style/text_view_body"
                        android:layout_width="fill_parent"
                        android:layout_marginTop="10dp"
                        android:gravity="center"
                        android:text="Now in Pantry"
                        android:textColor="#FFFFFF"
                        android:textSize="16dp" />

                    <EditText
                        android:id="@+id/add_quantityfragment_etremainingquantity"
                        style="@style/edittext"
                        android:layout_width="fill_parent"
                        android:layout_centerVertical="true"
                        android:layout_marginLeft="10dp"
                        android:layout_marginRight="10dp"
                        android:background="@drawable/layout_border2"
                        android:digits="0123456789."
                        android:inputType="numberDecimal"
                        android:singleLine="true" />

                    <TextView
                        android:id="@+id/add_quantityfragment_tvremainingunits"
                        style="@style/text_view_body"
                        android:layout_width="fill_parent"
                        android:layout_below="@+id/add_quantityfragment_etremainingquantity"
                        android:layout_marginRight="10dp"
                        android:layout_marginTop="5dp"
                        android:gravity="right"
                        android:text=""
                        android:textColor="#FFFFFF"
                        android:textSize="16dp" />
                </RelativeLayout>
            </LinearLayout>
        </LinearLayout>
    </RelativeLayout>

未设置文字。我尝试用不同的方法设置它，例如#onActivityCreated（），＃onStart（）和#onResume（），但我无法这样做。

有什么想法吗？

Answer 1

但您应return view;

onCreateView(..)

return V;

像：

 public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View V = inflater.inflate(R.layout.quantityfragment, container, false);

    TextView tvpurchasedunits = (TextView).findViewById(R.id.tvpurchasedunits);

    tvpurchasedunits.setText("units");

    return V;
   }

Answer 2

你是如何使用你的片段的？当片段通过将容器指定为null而膨胀时，我们通常不会添加到组中。

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View V = inflater.inflate(R.layout.quantityfragment, null, false);

    TextView tvpurchasedunits = (TextView) V
                .findViewById(R.id.tvpurchasedunits);
    tvpurchasedunits.setText("units");
    return V;
}

TextView的文本未在Fragment中设置

2 个答案: