android - 单击时如何将按钮图像从打开切换到关闭，反之亦然？

Question

我一直在尝试通过为打开状态添加图像和为关闭状态添加图像来将按钮的状态从打开切换为关闭，反之亦然。我尝试通过 xml，但是我只能在单击时临时切换它(通过使用 press/focus 等)。这是相同的代码:

fragment 贾斯汀:

<RelativeLayout
        android:id="@+id/top_bar_container"
        android:layout_width="match_parent"
        android:layout_height="48.5dp"
        android:layout_alignParentTop="true"
        android:background="@color/background_action_bar"
        android:orientation="horizontal" >

        <ImageButton
            android:id="@+id/menu_button"
            android:layout_width="30dp"
            android:layout_height="48.5dp"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:background="@android:color/transparent"
            android:paddingRight="24dp"
            android:src="@drawable/overflow_btn" />

        <com.justin.abc.FontTextView
            android:id="@+id/most_recent_text"
            android:layout_width="wrap_content"
            android:layout_height="48.5dp"
            android:layout_marginLeft="11dp"
            android:layout_marginRight="2dp"
            android:textColor="@color/white"
            foo:customFont="Cabin-Bold.ttf"
            android:layout_alignParentLeft="true"
            android:textSize="18sp"
            android:gravity="center_vertical"
            android:text="@string/most_recent"/>

    </RelativeLayout>

只关注图像按钮部分，您会看到 overflow_btn。现在 overflow_btn 是 drawable 下调用的类，如下:

溢出按钮:

 <?xml version="1.0" encoding="utf-8"?>

<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
    android:state_enabled="false"
    android:drawable="@drawable/overflow_pressed" />
<item
    android:state_pressed="true"
    android:state_enabled="true"
    android:drawable="@drawable/overflow_pressed" />
<item
    android:state_focused="true"
    android:state_enabled="true"
    android:drawable="@drawable/overflow_pressed" />
<item
    android:state_enabled="true"
    android:drawable="@drawable/overflow" />
</selector>

使用上面的代码后，它仅在点击时临时切换按钮状态(就像它闪烁到 overflow_pressed)并恢复为溢出。我相信可能需要在 java 代码中进行一些更改才能实现，因此这是相应的 java 类:

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

        mAdapter = new CursorAdapter(getActivity(), null, 0);
        final ListView list = (ListView) view.findViewById(R.id.justin_list);
        list.setAdapter(mAdapter);
        list.setOnItemLongClickListener(this);
        list.setOnTouchListener(this);
        list.setOnItemClickListener(this);

        LayoutUtils.showLoading(view, R.id.justin_list);
        return view;
    }

    private void setOnclickListeners(final View view){
        final ImageButton button = (ImageButton) view.findViewById(R.id.menu_button);
        button.setOnClickListener(this);
    }

    private void createMenus() {
        mPreferenceMenuItems.add(PreferenceMenuItems.JUSTIN_PREFERENCES);
        mPreferencesMenuHelper = new MenuHelper(getActivity(), mPreferenceMenuItems,this);

        mDeleteMenuItems.add(DeleteMenuItems.DELETE_JUSTIN);
        mDeleteMenuHelper = new MenuHelper(getActivity(), mDeleteMenuItems,this);
    }

    @Override
    public void onResume() {
        super.onResume();
        final MainActivity activity = (MainActivity) getActivity();
        activity.updateActionBarTitle();
        final IntentFilter filter = new IntentFilter();
        activity.getApplicationContext().registerReceiver(mReceiver, filter);
    }

    @Override
    public void onPause() {
        getActivity().getApplicationContext().unregisterReceiver(mReceiver);
        super.onPause();
    }

    @Override
    public void onCursorLoaded(final Uri uri, final Cursor cursor) {
        if (cursor.getCount() > 0) {
            mAdapter.swapCursor(cursor);
            showResults(uri);
        } else {
            if (!isOperationExecuting()) {
                showNoResults(uri);
            }
        }
    }


    @Override
    public void onMenuItemClicked(final int position) {
        if (isPreferences) {
            switch (position) {
                case PreferenceMenuItems.JUSTIN_PREFERENCES_POSITION:
                    PreferencesActivity.newInstance(getActivity());
                    break;
                default:
                    break;
            }
            mPreferencesMenuHelper.hideMenu();
        } else {
            switch (position) {
                case DeleteMenuItems.DELETE_POSITION:
                    final DialogFragment dialog = new DeleteFromDialogFragment();
                    final Bundle bundle = new Bundle();
                    bundle.putString(JUSTIN_ID, mJustinID);
                    dialog.setArguments(bundle);
                    dialog.show(getFragmentManager(), DELETE_FROM_JUSTIN );
                    break;
                default:
                    break;
            }
            mDeleteMenuHelper.hideMenu();
        }
    }

    @Override
    public void onClick(final View view) {
        switch (view.getId()) {
            case R.id.justin_menu_button:
                final Activity activity = getActivity();
                final int actionBarHeight = activity.findViewById(R.id.title_main_container).getHeight();
                final int menuBarHeight = activity.findViewById(R.id.justin_top_bar_container).getHeight();
                mPreferencesMenuHelper.showMenu(actionBarHeight + menuBarHeight, Gravity.RIGHT, R.style.MenuDialogAnimation);
                isPreferences = true;

                break;
            default:
                break;
        }
    }

    @Override
    public void showResults(final Uri uri) {
        if (mIsAnimating) {
            mShouldShowResult = true;
        } else {
            LayoutUtils.showResults(getView(), R.id.justin_list);
            mShouldShowResult = false;
        }
    }

    @Override
    public void showNoResults(final Uri uri) {
        if (mIsAnimating) {
            mShouldShowNoResult  = true;
        } else {
            LayoutUtils.showNoResult(getView(), R.id.justin_list, getResources().getString(R.string.no_result));
            mShouldShowNoResult = false;
        }
    }

    @Override
    public void onOperationStarted(final Uri uri) {
        LayoutUtils.showLoading(getView(), R.id.justin_list);
    }

    @Override
    public boolean onItemLongClick(final AdapterView<?> adapter, final View view, final int position, final long id) {
        isPreferences = false;
        final Activity activity = getActivity();
        final int actionBarHeight = activity.findViewById(R.id.title_main_container).getHeight();
        final int menuBarHeight = activity.findViewById(R.id.justin_top_bar_container).getHeight();
        mDeleteMenuHelper.showMenu(mYValue + actionBarHeight + menuBarHeight, Gravity.CENTER, R.style.MenuDialogAnimation);

        final Cursor cursor = (Cursor) mAdapter.getItem(position);
        mJustinID = cursor.getString(cursor.getColumnIndex(Justin.Columns.ID));

        return false;
    }

    @Override
    public boolean onTouch(final View v, final MotionEvent event) {
        if(event.getAction() == MotionEvent.ACTION_DOWN){
            mYValue = (int)event.getY();
        }

        return false;
    }

    public void restartLoader(){
        getContentLoader().restartLoader();
    }

    @Override
    public void onItemClick(final AdapterView<?> adapter, final View view, final int position, final long id) {
        final Cursor cursor = (Cursor) mAdapter.getItem(position);
        if (!NetworkUtils.isOnline() && ContentProvider.isStoryEmty(cursor)) {
            final DialogFragment dialog = new CheckOfflineAccessDialogFragment();
            dialog.show(getFragmentManager(), OFFLINE_ACCESS);
            return;
        }

        final String documentSource = cursor.getString(cursor.getColumnIndex(Justin.Columns.SOURCE));
        final ArticlePagerFragment ArticlePagerFragment = ArticlePagerFragment.newInstance(getFragmentManager(), position, documentSource, false);
        ArticlePagerFragment.setFragment(this);

    }

    public static String getArticleID(final Cursor cursor) {
        final String documentLink = cursor.getString(cursor.getColumnIndex(Justin.Columns.DOCUMENT_LINK));
        final String documentType = cursor.getString(cursor.getColumnIndex(Justin.Columns.TYPE));
        final String source = cursor.getString(cursor.getColumnIndex(Justin.Columns.SOURCE));
        String articleID = "";
        if (source.equalsIgnoreCase(Justin.NEWS_SOURCE_VALUE) && documentType.equalsIgnoreCase(Justin.TEXT_TYPE)) {
            articleID = documentLink.substring(documentLink.lastIndexOf("storyId=")+8);
        }
        return articleID;
    }

知道怎么做吗？

菜单助手:

public class MenuHelper implements OnItemClickListener{

    private final Dialog mMenu;
    private final OnMenuItemClickedListener mMenuItemListener;
    private final ArrayAdapter<String> mAdapter;
    private final int MENU_ITEM_HEIGHT = 40; // Defined in res/layout/menu_item.xml

    private List<Boolean> enabledStates;

    public MenuHelper(final Context context, final List<String> menuItems, final OnMenuItemClickedListener menuItemListener) {
        mMenu = new Dialog(context);
        mMenu.requestWindowFeature(Window.FEATURE_NO_TITLE);
        mMenu.setContentView(R.layout.menu_container);
        enabledStates = new ArrayList<Boolean>(menuItems.size());
        for(int i = 0; i < menuItems.size(); i++) {
            enabledStates.add(true);
        }

        final ListView menuList = (ListView) mMenu.findViewById(R.id.menu_list);
        mAdapter = new ArrayAdapter<String>(context, R.layout.menu_item, menuItems) {
            @Override
            public boolean isEnabled(int position) {
                return enabledStates.get(position);
            }

            @Override
            public boolean areAllItemsEnabled() {
                return false;
            }

            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                View view = super.getView(position, convertView, parent);
                if(enabledStates.get(position)) {
                    ((TextView) view).setTextColor(Application.getAppResources().getColor(R.color.white));
                } else {
                    ((TextView) view).setTextColor(Application.getAppResources().getColor(R.color.disabled_gray));
                }
                if (convertView == null) {
                    convertView = super.getView(position, convertView, parent);
                }

                // check for odd or even to set alternate colors to the row background
                if (position % 2 == 0) {
                    convertView.setBackgroundResource(R.drawable.oddcellcolor);
                } else {
                    convertView.setBackgroundResource(R.drawable.evencellcolor);
                }
                return convertView;
                //return view;
            }
        };
        menuList.setOnItemClickListener(this);
        menuList.setAdapter(mAdapter);
        mMenuItemListener = menuItemListener;
    }

    public void showMenu(final int yPosition, final int horizontalGravity) {
        showMenu(yPosition, horizontalGravity, R.style.MenuDialogAnimation);
    }

    public void setEnabled(int position, boolean isEnabled) {
        enabledStates.set(position, isEnabled);
        mAdapter.notifyDataSetChanged();
    }

    public void setEnabledAll(boolean isEnabled) {
        for(int ii = 0; ii < enabledStates.size(); ii++) {
            enabledStates.set(ii, isEnabled);
        }
        mAdapter.notifyDataSetChanged();
    }

    public int getMenuHeight() {
        if (mMenu != null) {
            return (int) (mAdapter.getCount() * MENU_ITEM_HEIGHT  / Application.getAppResources().getDisplayMetrics().density);
        } else {
            return -1;
        }
    }

    public void showMenu(final float yPosition, final int horizontalGravity, final int animation) {
        final Window window = mMenu.getWindow();
        window.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
        if (horizontalGravity != Gravity.CENTER) {
            window.clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);
        }
        final WindowManager.LayoutParams params = window.getAttributes();
        params.gravity = Gravity.TOP | horizontalGravity;
        params.y = Math.round(yPosition);
        params.windowAnimations = animation;
        window.setAttributes(params);
        mMenu.show();
    }

    public void hideMenu() {
        mMenu.hide();
    }

    @Override
    public void onItemClick(final AdapterView<?> adapter, final View view, final int position, final long parent) {
        mMenuItemListener.onMenuItemClicked(position);
    }


}

谢谢!贾斯汀

Answer 1

我同意@Chronos，这听起来更像是ToggleButton有两个州。保持简单，这是我的，您可以将其用作示例。无需代码，只需 xml。

这是我的布局的 xml:

<ToggleButton
        android:id="@+id/btnHeadache"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:layout_centerHorizontal="true"
        android:background="@drawable/headache_button"
        android:paddingTop="25sp"
        android:text="@string/headache"
        android:textOn=""
        android:textOff="" />

现在这是不同州的 xml，当然是在我的带有图像的可绘制文件夹中。这被命名为 headache_button.xml 以防上面不清楚。:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/check"  android:state_checked="true"/> <!-- currently pressed turning the toggle on -->
    <item android:drawable="@drawable/headache" android:state_checked="false" /> <!-- currently pressed turning the toggle off   -->
</selector>