当我单击其中一个 fragment 中的按钮时，没有任何反应，监听器无法工作。每当我输入按钮尝试转换到按钮时，它都不会像应该的那样变成紫色。
Java:
public class CollegeMatch extends Fragment {
TextView resuLTS;
EditText actorsat;
EditText rank;
EditText gpa;
EditText apclasses;
public Button calcButton;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_college_match, container, false);
resuLTS = (TextView) view.findViewById(R.id.resuLTS);
actorsat = (EditText) view.findViewById(R.id.actorsat);
gpa = (EditText) view.findViewById(R.id.gpa);
rank = (EditText) view.findViewById(R.id.rank);
apclasses = (EditText) view.findViewById(R.id.apclasses);
Button calcButton;
calcButton = (Button) view.findViewById(R.id.calcButton);
calcButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view2) {
float act = Float.parseFloat(actorsat.getText().toString());
float ap = Float.parseFloat(apclasses.getText().toString());
float rk = Float.parseFloat(rank.getText().toString());
float gp = Float.parseFloat(gpa.getText().toString());
float res = act + ap + rk + gp;
resuLTS.setText(Float.toString(res));
}
});
return view;
}
}
XML:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="layout.CollegeMatch"
android:background="#bdeaf4"
android:id="@+id/calcBTN">
<!-- TODO: Update blank fragment layout -->
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Find colleges!"
android:id="@+id/textView134"
android:layout_marginTop="50dp"
android:textColor="#000000"
android:textSize="37dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:typeface="serif"
android:textStyle="bold" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="number"
android:ems="10"
android:id="@+id/actorsat"
android:layout_marginTop="57dp"
android:autoText="false"
android:hint="Enter Composite Score "
android:layout_below="@+id/textView134"
android:layout_alignLeft="@+id/gpa"
android:layout_alignStart="@+id/gpa" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="ACT Composite"
android:id="@+id/textView135"
android:textColor="@color/abc_input_method_navigation_guard"
android:textSize="25dp"
android:layout_alignBottom="@+id/actorsat"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginLeft="46dp"
android:layout_marginStart="46dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Unweighted GPA"
android:id="@+id/textView136"
android:textColor="@color/abc_input_method_navigation_guard"
android:textSize="25dp"
android:layout_marginTop="35dp"
android:layout_below="@+id/textView135"
android:layout_alignLeft="@+id/textView135"
android:layout_alignStart="@+id/textView135" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Class Rank (Top _ %)"
android:id="@+id/textView138"
android:textColor="@color/abc_input_method_navigation_guard"
android:textSize="25dp"
android:layout_marginTop="47dp"
android:layout_below="@+id/textView136"
android:layout_alignLeft="@+id/textView136"
android:layout_alignStart="@+id/textView136" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="number"
android:ems="10"
android:id="@+id/rank"
android:layout_above="@+id/tex554"
android:layout_alignLeft="@+id/apclasses"
android:layout_alignStart="@+id/apclasses"
android:hint="Enter Here (omit % sign) " />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Total # of AP classes"
android:id="@+id/tex554"
android:textColor="@color/abc_input_method_navigation_guard"
android:textSize="25dp"
android:layout_marginTop="39dp"
android:layout_below="@+id/textView138"
android:layout_alignLeft="@+id/textView138"
android:layout_alignStart="@+id/textView138" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="number"
android:ems="10"
android:id="@+id/apclasses"
android:hint="Enter number here"
android:layout_alignBottom="@+id/tex554"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Match Me!"
android:id="@+id/calcButton"
android:layout_marginTop="57dp"
android:background="#ff0000"
android:textColor="#ffffff"
android:textSize="50dp"
android:layout_below="@+id/apclasses"
android:layout_alignLeft="@+id/textView134"
android:layout_alignStart="@+id/textView134" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Your College Match Results:"
android:id="@+id/textView155"
android:textColor="@color/abc_input_method_navigation_guard"
android:textSize="32dp"
android:layout_marginTop="46dp"
android:textStyle="normal|bold|italic"
android:layout_below="@+id/calcButton"
android:layout_centerHorizontal="true" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="numberDecimal"
android:ems="10"
android:id="@+id/gpa"
android:hint="Enter GPA here"
android:layout_above="@+id/textView138"
android:layout_alignLeft="@+id/rank"
android:layout_alignStart="@+id/rank" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="0"
android:id="@+id/resuLTS"
android:layout_below="@+id/textView155"
android:layout_alignLeft="@+id/textView155"
android:layout_alignStart="@+id/textView155"
android:layout_marginTop="76dp"
android:layout_alignRight="@+id/textView155"
android:layout_alignEnd="@+id/textView155"
android:textColor="#000000"
android:textIsSelectable="false"
android:textSize="25dp" />
</RelativeLayout>
最佳答案
您正在 onViewCreated() 方法中执行操作。创建 View 后会触发此方法，因此它不会应用您的内容。
将代码移至 onCreateView() 内，如下所示:
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_college_match, container, false);
//do stuffs, for example:
resuLTS = (TextView) view.findViewById(R.id.resuLTS);
actorsat = (EditText) view.findViewById(R.id.actorsat);
gpa = (EditText) view.findViewById(R.id.gpa);
rank = (EditText) view.findViewById(R.id.rank);
apclasses = (EditText) view.findViewById(R.id.apclasses);
Button calcbutton = (Button) view.findViewById(R.id.calcbutton);
calcbutton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick (View view2) {
float act = Float.parseFloat(actorsat.getText().toString());
float ap = Float.parseFloat(apclasses.getText().toString());
float rk = Float.parseFloat(rank.getText().toString());
float gp = Float.parseFloat(gpa.getText().toString());
float res = act + ap +rk +gp;
resuLTS.setText(Float.toString(res));
}
});
return view;
}
这应该可行(我已经用完了编译器，所以对于我在这里的任何问题，这可能并不完美)
关于java - onClickListener 无法在 Fragment 中工作，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/41348095/