无法解析symbole视图

Question

[已解决] 工作代码：

声明： private View view;

代码： view = inflater.inflate(R.layout.fragment_main, container, false);

替代解决方案：

声明： private View view;

代码：
View v = inflater.inflate(R.layout.fragment_main,container, false); [All Views inside here]; return v;

或简单：

代码： View view = inflater.inflate(R.layout.fragment_main, container, false);

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我的编码问题一直让我误以为：“无法解析符号视图”。我试图清理构建，使cashe /重启项目无效，但没有任何影响。问题仍然存在。这适用于以下代码中使用的所有“视图”：

quizLinearLayout = (LinearLayout) `view`.findViewById(R.id.quizLinearLayoutEasy);
questionNumberTextViewEasy = (TextView) `view`.findViewById(R.id.questionNumberTextViewEasy);
flagImageView = (ImageView) `view`.findViewById(R.id.flagImageViewEasy);

guessLinearLayouts = new LinearLayout[1];
guessLinearLayouts[0] = (LinearLayout) `view`.findViewById(R.id.row1LinearLayoutEasy);
guessLinearLayouts[1] = (LinearLayout) `view`.findViewById(R.id.row2LinearLayoutEasy);
answerTextView = (TextView) `view`.findViewById(R.id.answerTextViewEasy);
return `view`;

以下是我的java代码，展示了如何使用这些代码：

public class MainActivityFragment extends Fragment {
...
private LinearLayout quizLinearLayout; // layout that contains the quiz
private TextView questionNumberTextViewEasy; // shows current question #
private ImageView flagImageView; // displays a flag
private LinearLayout[] guessLinearLayouts; // rows of answer Buttons
private TextView answerTextView; // displays correct answer

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_main, container, false);

        fileNameList = new ArrayList<>();
        quizCountriesList = new ArrayList<>();
        random = new SecureRandom();
        handler = new Handler();

        // load the shake animation that's used for incorrect answers
        shakeAnimation = AnimationUtils.loadAnimation(getActivity(), R.anim.incorrect_shake);
        shakeAnimation.setRepeatCount(3); // animation repeats 3 times

        // get references to GUI components
        quizLinearLayout = (LinearLayout) view.findViewById(R.id.quizLinearLayoutEasy);
        questionNumberTextViewEasy = (TextView) view.findViewById(R.id.questionNumberTextViewEasy);
        flagImageView = (ImageView) view.findViewById(R.id.flagImageViewEasy);

        guessLinearLayouts = new LinearLayout[1];
        guessLinearLayouts[0] = (LinearLayout) view.findViewById(R.id.row1LinearLayoutEasy);
        guessLinearLayouts[1] = (LinearLayout) view.findViewById(R.id.row2LinearLayoutEasy);
        answerTextView = (TextView) view.findViewById(R.id.answerTextViewEasy);

        // configure listeners for the guess Buttons
        for (LinearLayout row : guessLinearLayouts) {
            for (int column = 0; column < row.getChildCount(); column++) {
                Button button = (Button) row.getChildAt(column);
                button.setOnClickListener(guessButtonListener);
            }//for-loop int column ends here
        }//for-loop LinearLayout row ends here

        // set questionNumberTextViewEasy's text
        questionNumberTextViewEasy.setText(
                getString(R.string.question, 1, FLAGS_IN_QUIZ));
        return view; // return the fragment's view for display

    }//onCreateView ends here

我的XML文件

<?xml version="1.0" encoding="utf-8"?>    
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/quizLinearLayoutEasy"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="16dp"
    android:paddingLeft="16dp"
    android:paddingRight="16dp"
    android:paddingTop="16dp"
    tools:context="com.example.android.testingflagquiz.MainActivityFragment"
    tools:showIn="@layout/activity_main">

    <TextView
        android:id="@+id/questionNumberTextViewEasy"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginBottom="@dimen/spacing"
        android:text="@string/question"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:textColor="@android:color/black" />

    <ImageView
        android:id="@+id/flagImageViewEasy"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_gravity="center"
        android:layout_marginBottom="@dimen/spacing"
        android:layout_marginLeft="@dimen/activity_horizontal_margin"
        android:layout_marginRight="@dimen/activity_horizontal_margin"
        android:layout_weight="1"
        android:adjustViewBounds="true"
        android:contentDescription="@string/image_description"
        android:scaleType="fitCenter" />

    <TextView
        android:id="@+id/guessCountryTextViewEasy"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginBottom="5dp"
        android:text="@string/guess_country"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:textColor="#4c4c4c" />

    <LinearLayout
        android:id="@+id/row1LinearLayoutEasy"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

    </LinearLayout>

    <LinearLayout
        android:id="@+id/row2LinearLayoutEasy"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

    </LinearLayout>

    <LinearLayout
        android:id="@+id/row3LinearLayoutEasy"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="5dp"
        android:orientation="horizontal">

        <Button
            android:id="@+id/answerButton1Easy"
            style="@android:style/Widget.Material.Button.Colored"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_marginEnd="5dp"
            android:layout_weight="1"
            android:background="@color/colorAccent"
            android:lines="2"
            android:text="New Button"
            android:textColor="@color/button_text_color" />

        <Button
            android:id="@+id/answerButton2Easy"
            style="@android:style/Widget.Material.Button.Colored"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:background="@color/colorAccent"
            android:lines="2"
            android:text="New Button"
            android:textColor="@color/button_text_color" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/row4LinearLayoutEasy"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="20dp"
        android:orientation="horizontal">

        <Button
            android:id="@+id/answerButton3Easy"
            style="@android:style/Widget.Material.Button.Colored"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_marginEnd="5dp"
            android:layout_weight="1"
            android:background="@color/colorAccent"
            android:lines="2"
            android:text="New Button"
            android:textColor="@color/button_text_color" />

        <Button
            android:id="@+id/answerButton4Easy"
            style="@android:style/Widget.Material.Button.Colored"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:background="@color/colorAccent"
            android:lines="2"
            android:text="New Button"
            android:textColor="@color/button_text_color" />
    </LinearLayout>

    <TextView
        android:id="@+id/answerTextViewEasy"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|center_horizontal"
        android:gravity="center_horizontal"
        android:text="Medium Text"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:textSize="@dimen/answer_size"
        android:textStyle="bold" />

</LinearLayout>

我的AndroidManifest.xml（如果有用）

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.android.testingflagquiz">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name"
            android:theme="@style/AppTheme.NoActionBar">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

Answer 1

你应该这样写

   @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.fragment_main,container, false);
    questionNumberTextViewEasy = (TextView) v.findViewById(R.id.questionNumberTextViewEasy);
    return v;
 }

将所有内容移至onCreateView

中

Answer 2

首先在顶部声明视图，如

private View view;

然后替换此行

return inflater.inflate(R.layout.fragment_main, container, false);

通过

view = inflater.inflate(R.layout.fragment_main, container, false);

最终守则

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

        fileNameList = new ArrayList<>();
        quizCountriesList = new ArrayList<>();
        random = new SecureRandom();
        handler = new Handler();

        // load the shake animation that's used for incorrect answers
        shakeAnimation = AnimationUtils.loadAnimation(getActivity(), R.anim.incorrect_shake);
        shakeAnimation.setRepeatCount(3); // animation repeats 3 times

        // get references to GUI components
        quizLinearLayout = (LinearLayout) view.findViewById(R.id.quizLinearLayoutEasy);
        questionNumberTextViewEasy = (TextView) view.findViewById(R.id.questionNumberTextViewEasy);
        flagImageView = (ImageView) view.findViewById(R.id.flagImageViewEasy);

        guessLinearLayouts = new LinearLayout[1];
        guessLinearLayouts[0] = (LinearLayout) view.findViewById(R.id.row1LinearLayoutEasy);
        guessLinearLayouts[1] = (LinearLayout) view.findViewById(R.id.row2LinearLayoutEasy);
        answerTextView = (TextView) view.findViewById(R.id.answerTextViewEasy);

        // configure listeners for the guess Buttons
        for (LinearLayout row : guessLinearLayouts) {
            for (int column = 0; column < row.getChildCount(); column++) {
                Button button = (Button) row.getChildAt(column);
                button.setOnClickListener(guessButtonListener);
            }//for-loop int column ends here
        }//for-loop LinearLayout row ends here

        // set questionNumberTextViewEasy's text
        questionNumberTextViewEasy.setText(
                getString(R.string.question, 1, FLAGS_IN_QUIZ));
        return view; // return the fragment's view for display

    }//onCreateView ends here