如何将 TextView 中的文本设置为字符串 (AndriodStudio)？

Question

I have seen a lot of responses saying to use getResources().getString(R.string.coupon_1) to get the String from the strings.xml file and change it, but it continues to show the value in the strings.xml file for me instead of showing the String in coupon1, coupon2, or coupon3.

This is part of my method with some things I have tried:

public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_coupon, container, false);

        couponListTextView = view.findViewById(R.id.couponListTextView);
        couponItem1TextView = view.findViewById(R.id.couponItem1TextView);
        couponItem2TextView = view.findViewById(R.id.couponItem2TextView);
        couponItem3TextView = view.findViewById(R.id.couponItem3TextView);

//        coupon1 = "Is";
//        coupon2 = "this";
//        coupon3 = "working?";

        //coupon1 = getResources().getString(R.string.coupon_1);
        coupon1 = "Is";
        couponItem1TextView.setText(coupon1);
        //coupon2 = getResources().getString(R.string.coupon_2);
        coupon2 = "this";
        couponItem2TextView.setText(coupon2);
        //coupon3 = getResources().getString(R.string.coupon_3);
        coupon3 = "working?";
        couponItem3TextView.setText(coupon3);

        CouponRequest couponRequest = new CouponRequest(coupon1, coupon2, coupon3, responseListener, errorListener);
        RequestQueue queue = Volley.newRequestQueue(getActivity().getApplicationContext());
        queue.add(couponRequest);
        return inflater.inflate(R.layout.fragment_coupon, container, false);
    }

These are my declarations in strings.xml:

<string name="coupon_1">No coupon</string>
<string name="coupon_2">No coupon</string>
<string name="coupon_3">No coupon</string>

These are my TextView declarations in fragment_coupon:

<TextView
            android:id="@+id/couponItem1TextView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="24dp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/couponListTextView" />

        <TextView
            android:id="@+id/couponItem2TextView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="24dp"
            android:text="@string/coupon_2"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/couponItem1TextView" />

        <TextView
            android:id="@+id/couponItem3TextView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="24dp"
            android:text="@string/coupon_3"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/couponItem2TextView" />

Any help would be greatly appreciated.

Edit: The strings I am using here are for the purpose of testing the app. I really need to be able to write using a string whose value is decided at runtime.

Edit: I figured it out. I just needed to return view instead of creating a new instance of View.

Answer 1

A string is a simple resource that is referenced using the value provided in the name attribute. So all lines that you use should be in strings.xml .

<string name="no_coupon">No coupon</string>
<string name="is">Is</string>
<string name="this">this</string>
<string name="working">working?</string>

And as I understand it, your TextView are initially set by the string No coupon . So in .xml file TextView should have android:text="@string/no_coupon"

And in method onCreateView you can change text, using method setText() . For example, couponItem1TextView.setText(R.string.is);