向浮动回收器视图崩溃添加浮动操作按钮

Question

我正在尝试为回收站网格视图中的每个项目添加一个唯一的浮动操作按钮。我尝试将主题更改为MaterialComponent，但这没有用。该错误告诉我，崩溃发生在通货膨胀期间，即使主题是样式，我的主题也不是AppCompat。我想我可能只需要在XML中添加一些内容，但是不确定。有人知道如何解决此问题吗？

错误：

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.imagegridactivity, PID: 17829
    android.view.InflateException: Binary XML file line #36 in com.example.imagegridactivity:layout/custom_view: Binary XML file line #36 in com.example.imagegridactivity:layout/custom_view: Error inflating class com.google.android.material.floatingactionbutton.FloatingActionButton
    Caused by: android.view.InflateException: Binary XML file line #36 in com.example.imagegridactivity:layout/custom_view: Error inflating class com.google.android.material.floatingactionbutton.FloatingActionButton
    Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Constructor.newInstance0(Native Method)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:343)
        at android.view.LayoutInflater.createView(LayoutInflater.java:854)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:1006)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:961)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:1123)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1084)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:1126)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1084)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:682)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:534)
        at com.example.imagegridactivity.AnimalsAdapter.onCreateViewHolder(AnimalsAdapter.java:135)
        at com.example.imagegridactivity.AnimalsAdapter.onCreateViewHolder(AnimalsAdapter.java:29)
        at androidx.recyclerview.widget.RecyclerView$Adapter.createViewHolder(RecyclerView.java:7078)
        at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6235)
        at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6118)
        at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6114)
        at androidx.recyclerview.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2303)
        at androidx.recyclerview.widget.GridLayoutManager.layoutChunk(GridLayoutManager.java:561)
        at androidx.recyclerview.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1587)
        at androidx.recyclerview.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:665)
        at androidx.recyclerview.widget.GridLayoutManager.onLayoutChildren(GridLayoutManager.java:170)
        at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:4134)
        at androidx.recyclerview.widget.RecyclerView.onMeasure(RecyclerView.java:3540)
        at android.view.View.measure(View.java:25086)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6872)
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
        at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:1204)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:723)
        at android.view.View.measure(View.java:25086)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6872)
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
        at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:1204)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:723)
        at android.view.View.measure(View.java:25086)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6872)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
        at androidx.appcompat.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:143)
        at android.view.View.measure(View.java:25086)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6872)
        at androidx.appcompat.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:403)
        at android.view.View.measure(View.java:25086)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6872)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
        at android.view.View.measure(View.java:25086)
E/AndroidRuntime:     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6872)
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
        at android.view.View.measure(View.java:25086)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6872)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
        at com.android.internal.policy.DecorView.onMeasure(DecorView.java:742)
        at android.view.View.measure(View.java:25086)
        at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:3083)
        at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1857)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2146)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1745)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7768)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:967)
        at android.view.Choreographer.doCallbacks(Choreographer.java:791)
        at android.view.Choreographer.doFrame(Choreographer.java:726)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:952)
        at android.os.Handler.handleCallback(Handler.java:883)
        at android.os.Handler.dispatchMessage(Handler.java:100)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:7356)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
     Caused by: java.lang.IllegalArgumentException: The style on this component requires your app theme to be Theme.AppCompat (or a descendant).
        at com.google.android.material.internal.ThemeEnforcement.checkTheme(ThemeEnforcement.java:248)
        at com.google.android.material.internal.ThemeEnforcement.checkAppCompatTheme(ThemeEnforcement.java:218)
        at com.google.android.material.internal.ThemeEnforcement.checkCompatibleTheme(ThemeEnforcement.java:153)
        at com.google.android.material.internal.ThemeEnforcement.obtainStyledAttributes(ThemeEnforcement.java:81)
        at com.google.android.material.floatingactionbutton.FloatingActionButton.<init>(FloatingActionButton.java:212)
        at com.google.android.material.floatingactionbutton.FloatingActionButton.<init>(FloatingActionButton.java:201)

适配器：

public class AnimalsAdapter extends RecyclerView.Adapter<AnimalsAdapter.ViewHolder> {

    ImageView imageView;
    FloatingActionButton floatingActionButton;

    private Uri imageUri;
    private ArrayList<animal_item> mDataSet;
    private Context mContext;
    private OnItemClickListener mListener;

    public ArrayList<animal_item> getDataSet() {
        return mDataSet;
    }

    public void setDataSet(ArrayList<animal_item> mDataSet) {
        this.mDataSet = mDataSet;
    }

    public ImageView getImageView() {
        return imageView;
    }

    public void setImageView(ImageView imageView) {
        this.imageView = imageView;
    }

    public Context getContext() {
        return mContext;
    }

    public void setContext(Context mContext) {
        this.mContext = mContext;
    }

    public Uri getImageUri() {
        return imageUri;
    }

    public void setImageUri(Uri imageUri) {
        this.imageUri = imageUri;
    }

    public interface OnItemClickListener {

        void onItemClick(int position);

    }

    public void setOnItemClickListener(OnItemClickListener listener) {

        mListener = listener;

    }

    public AnimalsAdapter(Context context, ArrayList<animal_item> DataSet) {
        mDataSet = DataSet;
        mContext = context;
    }

    public ArrayList<animal_item> DataSet() {

        return mDataSet;
    }

    public static class ViewHolder extends RecyclerView.ViewHolder {
        public ImageView mImageView;
        public FloatingActionButton mFloatingActionButton;
        public RelativeLayout mLinearLayout;

        public ViewHolder(View v, final OnItemClickListener listener) {
            super(v);

            mImageView = (ImageView) v.findViewById(R.id.tv);
            mFloatingActionButton = (FloatingActionButton) v.findViewById(R.id.floatingActionButton);

            mImageView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {

                    if (listener != null) {

                        int position = getAdapterPosition();
                        if (position != RecyclerView.NO_POSITION) ;
                        listener.onItemClick(position);
                    }
                }
            });
            mLinearLayout = (RelativeLayout) v.findViewById(R.id.ll);
        }



        public ImageView getImageView() {

            return mImageView;
        }

        public void setImageView(ImageView mImageView) {

            this.mImageView = mImageView;
        }
    }

    @Override
    public AnimalsAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        View v = LayoutInflater.from(mContext).inflate(R.layout.custom_view, parent, false);
        ViewHolder vh = new ViewHolder(v, (OnItemClickListener) mListener);
        return vh;
    }

    @Override
    public void onBindViewHolder(final ViewHolder holder, final int position) {

        final animal_item animalItem = mDataSet.get(position);

        holder.mImageView.setImageResource(animalItem.getImageResource());

        imageView = holder.mImageView;

    }

    @Override
    public int getItemCount() {

        return mDataSet.size();
    }

}

自定义视图：

<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:id="@+id/card_view"
    android:layout_width="123dp"
    android:layout_height="123dp"
    card_view:cardElevation="0dp"
    card_view:cardMaxElevation="0dp"
    card_view:contentPadding="0dp">

    <RelativeLayout
        android:id="@+id/ll"
        android:layout_width="110dp"
        android:layout_height="110dp"
        android:padding="0dp"
        android:orientation="horizontal">

        <ImageButton
            android:id="@+id/tv"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_gravity="center"
            android:layout_margin="0dp"
            android:gravity="center"
            android:padding="0dp"
            android:textColor="#000"
            android:textSize="25dp"
            android:textStyle="bold"
            />


     <com.google.android.material.floatingactionbutton.FloatingActionButton
            android:id="@+id/floatingActionButton"
            android:layout_width="25dp"
            android:layout_height="25dp"
            android:layout_alignParentStart="true"
            android:layout_alignParentLeft="true"
            android:layout_alignParentTop="true"
            android:layout_marginStart="95dp"
            android:layout_marginLeft="95dp"
            android:layout_marginTop="96dp"
            android:layout_weight="1"
            android:clickable="true"
            android:background="@drawable/image_background_base"/>

    </RelativeLayout>



</androidx.cardview.widget.CardView>

样式：

<resources>

    <style name="AppTheme" parent="@style/Theme.AppCompat.Light">">

        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

</resources>

清单：

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

    <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=".PickImageActivity"></activity>
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>

等级：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 29
    buildToolsVersion "29.0.2"

    defaultConfig {
        applicationId "com.example.imagegridactivity"
        minSdkVersion 16
        targetSdkVersion 29
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }

}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])

    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
    implementation 'androidx.recyclerview:recyclerview:1.1.0'
    implementation 'androidx.recyclerview:recyclerview-selection:1.1.0-rc01'
    implementation "androidx.cardview:cardview:1.0.0"
    implementation 'com.github.bumptech.glide:glide:4.11.0'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.11.0'
    implementation 'com.google.android.material:material:1.1.0'

}

主要活动：

public class MainActivity extends AppCompatActivity {


    private Context mContext;

    //RelativeLayout mRelativeLayout;
    private RecyclerView mRecyclerView;
    private AnimalsAdapter mAdapter;
    private RecyclerView.LayoutManager mLayoutManager;
    private ArrayList<animal_item> arrayList;
    private Uri imageUri;

    private int imagePosition;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        requestWindowFeature(Window.FEATURE_ACTION_BAR);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        mContext = getApplicationContext();

        //mRelativeLayout = findViewById(R.id.rl);
        mRecyclerView = findViewById(R.id.recycler_view);

        final int[] imageArray = new int[9];

        for (int i = 0; i < imageArray.length; i++) {

            imageArray[i] = R.drawable.image_background_base;

        }

        arrayList = new ArrayList<>();

        for (int i = 0; i < imageArray.length; i++) {

            int image = imageArray[i];
            arrayList.add(new animal_item(image));

        }

        mLayoutManager = new GridLayoutManager(mContext, 3);
        mRecyclerView.setLayoutManager(mLayoutManager);
        mAdapter = new AnimalsAdapter(mContext, arrayList);
        mRecyclerView.setAdapter(mAdapter);

        mAdapter.setOnItemClickListener(new AnimalsAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(int position) {

                Intent intent = new Intent(Intent.ACTION_PICK);
                intent.setType("image/*");
                intent.setAction(Intent.ACTION_GET_CONTENT);
                startActivityForResult(intent, 1);


                imagePosition = position;
            }
        });

        ItemTouchHelper helper = new ItemTouchHelper(new ItemTouchHelper.SimpleCallback(ItemTouchHelper.UP | ItemTouchHelper.DOWN | ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT, 0) {

            final ArrayList aL = new ArrayList<>();

            @Override
            public boolean onMove(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder dragged, @NonNull RecyclerView.ViewHolder target) {

                int position_dragged = dragged.getAdapterPosition();
                int position_target = target.getAdapterPosition();

                Collections.swap(arrayList, position_dragged, position_target);
                mAdapter.notifyItemMoved(position_dragged, position_target);
                //Collections.copy(mQuestion11List, aL);

                return false;
            }

            @Override
            public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {

            }
        });

        helper.attachToRecyclerView(mRecyclerView);

    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        imageUri = data.getData();

        //mAdapter.getDataSet().get(imagePosition).setImageResource();

        mLayoutManager.findViewByPosition(imagePosition).findViewById(R.id.tv);

        Glide.with(MainActivity.this).load(imageUri).centerCrop().into((ImageView) mLayoutManager.findViewByPosition(imagePosition).findViewById(R.id.tv));

    }
}

主要活动XML：

<?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/rl"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#c2dbfd"
    tools:context=".MainActivity">


    <androidx.recyclerview.widget.RecyclerView

        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        >

    </androidx.recyclerview.widget.RecyclerView>



</LinearLayout>

Answer 1

您是否在应用程序的build.gradle文件中包含了材料设计包？

dependencies {
    // ...
    implementation 'com.google.android.material:material:1.1.0'
    // ...
}

在这里阅读更多https://material.io/develop/android/docs/getting-started/

Answer 2

该错误表明您的应用需要主题。为此，请在清单文件的application标签中添加主题：

<application 
          your application configurations
          android:theme="@style/AppTheme">

并且在您的应用程序build.gradle中添加以下依赖项

implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.core:core-ktx:1.1.0'
implementation 'com.google.android.material:material:1.1.0'

让我知道它是否有效：）

Answer 3

Caused by: java.lang.IllegalArgumentException: 
The style on this component requires your app theme to be Theme.AppCompat (or a descendant).

用于实例化context的Adapter存在问题。您需要传入Activity，不是ApplicationContext。应用程序上下文没有您的应用程序主题。

更改

mContext = getApplicationContext();

至this。