触发了错误的onclick侦听器

y4ekin9u  于 2021-07-03  发布在  Java
关注(0)|答案(1)|浏览(296)

我有一张单子。在列表中，每个项目分为两个视图。每个视图都有单独的侦听器。问题是监听器使用了错误的id来表示意图。为了使列表膨胀，我从游标适配器得到了一个数据。在日志中我看到，每次点击后都会用到最后一个元素的id，而不是点击元素的id。
我需要意图发送用户到具有正确id的活动
代码

public class ListCursorAdapter extends CursorAdapter {

    private static final String TAG = "myLogs";

    /**
     * Constructs a new {@link ListCursorAdapter}.
     *
     * @param context The context
     * @param c       The cursor from which to get the data.
     */
    public ListCursorAdapter(Context context, Cursor c) {
        super(context, c, 0 /* flags */);
    }

    /**
     * Makes a new blank list item view. No data is set (or bound) to the views yet.
     *
     * @param context app context
     * @param cursor  The cursor from which to get the data. The cursor is already
     *                moved to the correct position.
     * @param parent  The parent to which the new view is attached to
     * @return the newly created list item view.
     */
    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {
        // Inflate a list item view using the layout specified in list_item.xml
        return LayoutInflater.from(context).inflate(R.layout.list_item, parent, false);
    }

    /**
     * This method binds the pet data (in the current row pointed to by cursor) to the given
     * list item layout. For example, the name for the current pet can be set on the name TextView
     * in the list item layout.
     *
     * @param view    Existing view, returned earlier by newView() method
     * @param context app context
     * @param cursor  The cursor from which to get the data. The cursor is already moved to the
     *                correct row.
     */

    @Override
    public void bindView(View view, Context context, final Cursor cursor) {
        // Find individual views that we want to modify in the list item layout

        final TextView nameTextView = (TextView) view.findViewById(R.id.name);
        final TextView summaryTextView = (TextView) view.findViewById(R.id.summary);

        // Find the columns of pet attributes that we're interested in
        int nameColumnIndex = cursor.getColumnIndex(ListEntry.COLUMN_ITEM_NAME);
        int breedColumnIndex = cursor.getColumnIndex(ListEntry.COLUMN_ITEM_DESCRIPTION);

        // Read the pet attributes from the Cursor for the current pet
        String petName = cursor.getString(nameColumnIndex);
        String petBreed = cursor.getString(breedColumnIndex);

        // If the pet breed is empty string or null, then use some default text
        // that says "Unknown breed", so the TextView isn't blank.
        if (TextUtils.isEmpty(petBreed)) {
            petBreed = context.getString(R.string.unknown_description);
        }

        // Update the TextViews with the attributes for the current pet
        nameTextView.setText(petName);
        summaryTextView.setText(petBreed);

//
//        view.findViewById(R.id.editImageView).setOnClickListener(
//                new View.OnClickListener() {
//                    @Override
//                    public void onClick(View v) {
//                        Log.v(TAG, "--- WE ARE IN IMAGEVIEW LISTENER ---");
//
//                        Intent intent = new Intent(v.getContext(), EditorActivity.class);
//
//                        // Form the content URI that represents the specific pet that was clicked on,
//                        // by appending the "id" (passed as input to this method) onto the
//                        // {@link PetEntry#CONTENT_URI}.
//                        // For example, the URI would be "content://com.example.android.pets/pets/2"
//                        // if the pet with ID 2 was clicked on.
//                        Uri currentPetUri = ContentUris.withAppendedId(
//                                ListContract.ListEntry.CONTENT_URI,
//                                cursor.getInt(cursor.getColumnIndex(ListEntry._ID))
//                        );
//
//
//                        Log.v(TAG, "--- CONTENT URI " + cursor.getInt(cursor.getColumnIndex(ListEntry._ID)));
//
//                        // Set the URI on the data field of the intent
//                        intent.setData(currentPetUri);
//
//                        // Launch the {@link EditorActivity} to display the data for the current pet.
//                        v.getContext().startActivity(intent);
//                    }
//                }
//        );
//
//        view.findViewById(R.id.leftSide).setOnClickListener(
//                new View.OnClickListener() {
//                    @Override
//                    public void onClick(View v) {
//                        Log.v(TAG, "--- WE ARE IN LEFTSIDE LISTENER ---");
//
//                        nameTextView.setPaintFlags(nameTextView.getPaintFlags()| Paint.STRIKE_THRU_TEXT_FLAG);
//                        summaryTextView.setPaintFlags(summaryTextView.getPaintFlags()| Paint.STRIKE_THRU_TEXT_FLAG);
//
//                    }
//                }
//        );

        Boolean completed = cursor.getInt(cursor.getColumnIndex(ListEntry.COLUMN_ITEM_COMPLETED)) == 1;
        if (completed) {
            setCompleted(view);
        }
    }
    //BaseAdapter -> getView;
    public void setCompleted(View view) {

    }

}

主要活动

public class CatalogActivity extends AppCompatActivity implements
                LoaderManager.LoaderCallbacks<Cursor> {

            private static final String TAG = "myLogs";

            /**Identifier for the pet data loader */
            private static final int LIST_LOADER = 0;

            /**Adapter for the ListView */
            ListCursorAdapter mCursorAdapter;

            @Override
            protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_catalog);
                // Changing font

//                typefaceName = Typeface.createFromAsset(getAssets(), "Roboto-Regular.ttf");
//                typefaceDescription = Typeface.createFromAsset(getAssets(), "OpenSans-Italic.ttf");
//
//                Typeface titleTypeface = Typeface.createFromAsset(getAssets(), "Roboto-Regular.ttf");
//                Typeface descriptionTypeface = Typeface.createFromAsset(getAssets(), "OpenSans-Italic.ttf");
//                TextView titleTextView = (TextView) findViewById(R.id.name);
//                TextView descriptionTextView = (TextView) findViewById(R.id.summary);
//                Log.v(TAG, "--- FONT IS ---" + titleTypeface );
//                if (titleTextView == null){
//                    Log.v(TAG, "***TEXTVIEW IS EMPTY***");
//                }
//                titleTextView.setTypeface(titleTypeface);
//                descriptionTextView.setTypeface(descriptionTypeface);

                Log.v(TAG, "--- WE ARE IN CATALOG ACTIVITY ---");

                // Setup FAB to open EditorActivity
                FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
                fab.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        Intent intent = new Intent(CatalogActivity.this, EditorActivity.class);
                        startActivity(intent);
                    }
                });

                // Find the ListView which will be populated with the list data
                ListView listListView = (ListView) findViewById(R.id.list);

                // Find and set empty view on the ListView, so that it only shows when the list has 0 items.
                View emptyView = findViewById(R.id.empty_view);
                listListView.setEmptyView(emptyView);

                // Setup an Adapter to create a list item for each row of list data in the Cursor.
                // There is no items data yet (until the loader finishes) so pass in null for the Cursor.
                mCursorAdapter = new ListCursorAdapter(this, null);
                listListView.setAdapter(mCursorAdapter);

                // Setup the item click listener
                listListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                    @Override
                    public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
                        ShoppingListBdHelper helper = new ShoppingListBdHelper(view.getContext());
                        if (helper.setCompleted(id)) {
                            mCursorAdapter.setCompleted(view);
                        }

                        if ( view.findViewById(R.id.editImageView).isSelected()){
                            Log.v(TAG, "++++++++ IF WORKS");
                        } else if (view.findViewById(R.id.leftSide).isSelected()){
                            Log.v(TAG, "+++++++ ELSE IF WORKS");
                        }
                    }
                });

                // Kick off the loader
                getSupportLoaderManager().initLoader(LIST_LOADER, null, this);
            }

            @Override
            public boolean onCreateOptionsMenu(Menu menu) {
                // Inflate the menu options from the res/menu/menu_catalog.xml file.
                // This adds menu items to the app bar.
                getMenuInflater().inflate(R.menu.menu_catalog, menu);
                return true;
            }

            @Override
            public boolean onOptionsItemSelected(MenuItem item) {
                // User clicked on a menu option in the app bar overflow menu
                switch (item.getItemId()) {
                    // Respond to a click on the "Insert dummy data" menu option
                    case R.id.action_share_button:
                        shareButton(mCursorAdapter.getCursor());
                        return true;
                    // Respond to a click on the "Delete all entries" menu option
                    case R.id.action_delete_all_entries:
                        deleteAllItems();
                        return true;
                }
                return super.onOptionsItemSelected(item);
            }

            /**
             * Share button
             */
            private void shareButton(Cursor cursor) {

                Log.v(TAG, "--- WE ARE IN SHARE BUTTON METHOD ---");

                List<String> test;
                test = new ArrayList<String>();
                cursor.moveToFirst();

                while(!cursor.isAfterLast()) {
                    Log.d(TAG, "field: " + cursor.getString(cursor.getColumnIndex(ListContract.ListEntry.COLUMN_ITEM_NAME)));

                    test.add(cursor.getString(cursor.getColumnIndex(ListContract.ListEntry.COLUMN_ITEM_NAME)) + " - " + cursor.getString(cursor.getColumnIndex(ListContract.ListEntry.COLUMN_ITEM_DESCRIPTION))); //add the item
    //                test.add(cursor.getString(cursor.getColumnIndex(ListContract.ListEntry.COLUMN_ITEM_DESCRIPTION))); //add the item
                    cursor.moveToNext();
                }

                cursor.moveToFirst();
                cursor.close();

    //            for (String comma : )

                Log.v(TAG, "--- OUR LIST INCLUDES: " + test.toString());

                Intent myIntent = new Intent();
                myIntent.setAction(Intent.ACTION_SEND);
                myIntent.putStringArrayListExtra("test", (ArrayList<String>) test);
                myIntent.putExtra(android.content.Intent.EXTRA_TEXT, test.toString());

                Log.v(TAG, "--- INTENT EXTRAS ARE: " + myIntent.getExtras());

                myIntent.setType("text/plain");
                startActivity(Intent.createChooser(myIntent, "Share using"));
            }

            /**
             * Helper method to delete all list in the database.
             */
            private void deleteAllItems() {

                Log.v(TAG, "Сработал метод удаления всех данных");
                long rowsDeleted = getContentResolver().delete(ListContract.ListEntry.CONTENT_URI, null, null);
                Log.v("CatalogActivity", rowsDeleted + " rows deleted from list database");
            }

            @Override
            public Loader<Cursor> onCreateLoader(int i, Bundle bundle) {
                Log.v(TAG, "Начал работать loader cursor");
                // Define a projection that specifies the columns from the table we care about.
                String[] projection = {
                        ListContract.ListEntry._ID,
                        ListContract.ListEntry.COLUMN_ITEM_NAME,
                        ListContract.ListEntry.COLUMN_ITEM_DESCRIPTION,
                        ListContract.ListEntry.COLUMN_ITEM_COMPLETED
                };

                // This loader will execute the ContentProvider's query method on a background thread
                return new CursorLoader(this,   // Parent activity context
                        ListContract.ListEntry.CONTENT_URI,   // Provider content URI to query
                        projection,             // Columns to include in the resulting Cursor
                        null,                   // No selection clause
                        null,                   // No selection arguments
                        null);                  // Default sort order

            }

            @Override
            public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
                // Update {@link ListCursorAdapter} with this new cursor containing updated pet data
                mCursorAdapter.swapCursor(data);
                Log.v(TAG, "Cursor adapter загрузился");
            }

            @Override
            public void onLoaderReset(Loader<Cursor> loader) {
                // Callback called when the data needs to be deleted
                mCursorAdapter.swapCursor(null);
            }

        }

xml格式

<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=".CatalogActivity">

<ListView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/list"
/>

<!-- Empty view for the list -->
<RelativeLayout
    android:id="@+id/empty_view"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true">

    <ImageView
        android:id="@+id/empty_shelter_image"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:src="@drawable/ic_empty_shelter"/>

    <TextView
        android:id="@+id/empty_title_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/empty_shelter_image"
        android:layout_centerHorizontal="true"
        android:fontFamily="sans-serif-medium"
        android:paddingTop="16dp"
        android:text="@string/empty_view_title_text"
        android:textAppearance="?android:textAppearanceMedium"/>

    <TextView
        android:id="@+id/empty_subtitle_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/empty_title_text"
        android:layout_centerHorizontal="true"
        android:fontFamily="sans-serif"
        android:paddingTop="8dp"
        android:text="@string/empty_view_subtitle_text"
        android:textAppearance="?android:textAppearanceSmall"
        android:textColor="#A2AAB0"/>
</RelativeLayout>

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_alignParentRight="true"
    android:layout_margin="@dimen/fab_margin"
    android:src="@drawable/ic_add_pet"/>

项目的xml

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:padding="@dimen/activity_margin">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:id="@+id/leftSide">

    <TextView
        android:id="@+id/name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:fontFamily="sans-serif-medium"
        android:textAppearance="?android:textAppearanceMedium"
        android:textColor="#2B3D4D"
        android:layout_alignParentLeft="true" />

    <TextView
        android:id="@+id/summary"
        android:layout_below="@+id/name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:fontFamily="sans-serif"
        android:textAppearance="?android:textAppearanceSmall"
        android:textColor="#AEB6BD"  />
    </LinearLayout>

    <ImageView
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_margin="5dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:fontFamily="sans-serif"
        android:id="@+id/editImageView"
        android:textAppearance="?android:textAppearanceSmall"
        android:src="@drawable/ic_edit"
        />
</RelativeLayout>
JavaandroidListViewandroid-cursoradapter

1条答案

按热度按时间
slwdgvem

slwdgvem1#

“总是最后一个身份证”。。。请显示列表元素的xml。在我看来，这就好像您的视图重叠一样，并且按照xml规则，它们彼此堆叠在一起。
因此，如果您的“last id”是用xml写在下面的，并且它与左边的视图重叠，那么很明显，这个视图总是会收到单击并触发它的侦听器。
更新
感谢您发布的xml-这正是我所想的，您的 LinearLayout 与…重叠 ImageView .
按以下方式更改线性布局：

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_toLeftOf="@+id/editImageView"
    android:orientation="vertical"
    android:id="@+id/leftSide">

添加 toLeftOf 以避免重叠并使高度 wrap_content . 那一切都会好起来的。

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