Java 为什么我不能在片段中动态更新文本?
这是我的Xml代码Java 为什么我不能在片段中动态更新文本?,java,android,android-layout,android-fragments,android-adapter,Java,Android,Android Layout,Android Fragments,Android Adapter,这是我的Xml代码 <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <Scro
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:text="Well heres the secret !"
android:textAlignment="center"
android:textColor="@color/bluishblack"
android:textSize="25sp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:text="1. Secret is simple,the cards we showed you contained key numbers(very first number of the list)"
android:textAlignment="center"
android:textSize="23sp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="' 2 , 4 , 1 , 16 , 32 , 8 , 64 ' "
android:textAlignment="center"
android:textColor="@color/dgreen"
android:textSize="23sp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:text="2. Above are the key numbers. For every card that contains spectator's number you add key number(First number of card) of respective card. "
android:textAlignment="center"
android:textSize="23sp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:text="3. And thats how you Read People's mind ! As easy as that ! "
android:textAlignment="center"
android:textSize="23sp" />
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center">
<Button
android:id="@+id/play_again"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:onClick="playAgain"
android:text="Play again !"
android:textColor="@color/dgreen"
/>
</RelativeLayout>
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="16dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
android:id="@+id/imageView"
android:layout_width="match_parent"
android:layout_height="150dp"
android:layout_marginBottom="8dp"
android:background="@drawable/googleg_standard_color_18" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:text="Your rating helps us to put more efforts i future devlopment,also we get to know more aboout your experiences and Views ! "
android:textAlignment="center"
android:textSize="20sp" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="99dp"
android:text="Rate now !" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Still Here? Do you want to amaze your friends and family.There are many awesome tricks which will blow away peoples mind yet so simple to do See below recommendations now "
android:textAlignment="center"
android:textSize="20sp"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:text="Do Want to amaze your Freinds !!"
android:textAlignment="center"
android:textColor="@android:color/black"
android:textSize="26sp" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="2dp"
android:layout_marginLeft="12dp"
android:layout_marginRight="12dp"
android:background="@android:color/darker_gray" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="6dp"
android:layout_marginTop="8dp"
android:text="Here are some of our Suggestions :- "
android:textColor="@color/colorPrimaryDark"
android:textSize="16sp" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="2dp"
android:layout_margin="8dp"
android:layout_marginLeft="12dp"
android:layout_marginRight="12dp"
android:background="@android:color/darker_gray" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_margin="8dp"
android:text="Swipe to see more --->"
android:textAlignment="center"
android:textSize="22sp" />
</LinearLayout>
</RelativeLayout>
</ScrollView>
<android.support.v4.view.ViewPager
android:id="@+id/view_pager"
android:layout_width="match_parent"
android:layout_height="500dp">
</android.support.v4.view.ViewPager>
</LinearLayout>
</ScrollView>
这是寻呼机布局的代码
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="24dp"
>
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="@drawable/ic_icon"
android:id="@+id/image_book"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="16dp"
>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAlignment="center"
android:text="This is description"
android:textSize="20sp"
android:id="@+id/textDes"
/>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
>
<Button
android:id="@+id/getItNow"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Start amazing your friends !"
android:textAlignment="center"
/>
</LinearLayout>
</LinearLayout>
如何动态更改文本和图像我还有三个使用相同布局(pager_布局)的片段我还可以添加不同的意图吗?您必须在onViewCreated()方法中的文本视图中设置文本,而不是在fragment类中的onCreateView()中设置文本:
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.pager_layout, container, false);
return view;
}
TextView tv;
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
tv = (TextView) view.findViewById(R.id.textDes);
tv.setText("text to set dynamically");
...
}
您必须在onViewCreated()方法内的文本视图中设置文本,而不是在片段类的onCreateView()中设置文本:
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.pager_layout, container, false);
return view;
}
TextView tv;
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
tv = (TextView) view.findViewById(R.id.textDes);
tv.setText("text to set dynamically");
...
}