将浮动操作按钮添加到 Recycler View 崩溃：此组件上的样式要求您的应用主题为 Theme.AppCompat
Adding Floating Action Button to Recycler View Crash: The style on this component requires your app theme to be Theme.AppCompat
我正在尝试向回收站网格视图中的每个项目添加一个独特的浮动操作按钮。我尝试将主题更改为 MaterialComponent，但没有用。该错误告诉我崩溃是在 inflation 期间发生的，并且我的主题不是 AppCompat，即使它是样式。我想我可能只需要在 XML 中添加一些东西，但我不确定。有谁知道如何解决这个问题？
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>
Gradle:
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Activity:
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ActivityXML:
<?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>
错误提示您的应用需要有主题。为此，在您的清单文件中，在您的应用程序标签中添加您的主题：
<application
your application configurations
android:theme="@style/AppTheme">
并在您的应用中 build.gradle 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:)
您是否在应用的 build.gradle 文件中包含了 material 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/
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 Adapter 的 context 存在问题。您需要传入 Activity， 而不是 ApplicationContext。
应用程序上下文 没有 您的应用主题。
在你的Activity改变
mContext = getApplicationContext();
mAdapter = new AnimalsAdapter(mContext, arrayList);
到
mAdapter = new AnimalsAdapter(this, arrayList);
还要注意，因为使用 Material Components 1.1.0，您的应用主题应该继承自 Material Components theme。
我正在尝试向回收站网格视图中的每个项目添加一个独特的浮动操作按钮。我尝试将主题更改为 MaterialComponent，但没有用。该错误告诉我崩溃是在 inflation 期间发生的，并且我的主题不是 AppCompat，即使它是样式。我想我可能只需要在 XML 中添加一些东西，但我不确定。有谁知道如何解决这个问题？
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>
Gradle:
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Activity:
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ActivityXML:
<?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>
错误提示您的应用需要有主题。为此，在您的清单文件中，在您的应用程序标签中添加您的主题：
<application
your application configurations
android:theme="@style/AppTheme">
并在您的应用中 build.gradle 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:)
您是否在应用的 build.gradle 文件中包含了 material 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/
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 Adapter 的 context 存在问题。您需要传入 Activity， 而不是 ApplicationContext。
应用程序上下文 没有 您的应用主题。
在你的Activity改变
mContext = getApplicationContext();
mAdapter = new AnimalsAdapter(mContext, arrayList);
到
mAdapter = new AnimalsAdapter(this, arrayList);
还要注意，因为使用 Material Components 1.1.0，您的应用主题应该继承自 Material Components theme。