3

我一直在尝试通过为打开添加图像并为关闭状态添加图像来将按钮的状态从打开切换到关闭，反之亦然。我尝试通过 xml，但是我只能在单击时临时切换它（通过使用按下/聚焦等）。这是相同的代码：

片段贾斯汀：

<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 imagebutton 部分，你会看到overflow_btn。现在 overflow_btn 是一个在 drawable 下调用的类，如下：

溢出_btn：

 <?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>

使用上述代码时，它仅在被点击时才会临时切换按钮状态（就像它闪烁到 overflow_pressed 一样）并恢复为溢出。我相信 java 代码中可能需要进行一些更改才能发生这种情况，因此这里是相应的 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;
    }

知道如何做同样的事情吗？

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

4

5 回答 5

3

我同意@Chronos，它听起来更像是一个有两种状态的ToggleButton 。保持简单，这是我的，你可以用它作为例子。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="" />

现在这里是不同状态的 xml，这当然是在我的带有图像的可绘制文件夹中。这被命名为头痛按钮.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>
于 2013-07-31T21:24:49.180 回答
1

如果我理解得很好，您需要一个ToggleButton，一个具有两种状态的按钮。

并使用这样的选择器：

<?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@drawable/btn_normal" android:state_checked="false"/>
    <item android:drawable="@drawable/btn_pressed" android:state_checked="true"/>

</selector>
于 2013-07-26T17:05:24.243 回答
0

如果我的理解正确，您需要一个具有两种状态的“按钮”，并在它们之间切换。

在这种情况下，它看起来更像是您想要 'ToggleButton'、'CompoundButton' 或 'Switch' 的行为。您可以根据@Chronos 使用'android :state_checked' 在xml 中配置它们。

于 2013-07-25T12:14:53.720 回答
0

听起来您应该使用CheckBox。常规按钮没有“开启”状态，只是按下并聚焦。使用复选框，您需要使用android:state_checked="true". 单击复选框将切换到选中状态，再次单击将其切换回默认值（未选中）。

尽量不要添加额外的 java 代码，直到您确定不能使用 XML 做某事。

于 2013-07-25T01:26:35.737 回答
0

您可以使用以下代码在代码中执行此操作：

// Declare button
// Set its original background image
button.setBackground(getResources().getDrawable(R.drawable.original_button_image));

button.setOnClickListener(new OnClickListener() {

    @Override
    public void onClick(View v) {

        // Choose whichever image for pressed state
        v.setBackground(getResources().getDrawable(R.drawable.button_is_pressed)); 

        new Handler().postDelayed(new Runnable() {

            public void run() {

                v.setBackground(getResources().getDrawable(R.drawable.original_button_image));

                // Button Click Code Here
            }

        }, 100L);    // Change this value to whatever is suitable

    }

});

编辑 1：

<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:src="@drawable/testdrawable"
        android:paddingRight="24dp" />

由于该按钮只有两种状态，请尝试testdrawable代替您在问题中发布的状态：

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item 
        android:state_selected="true" 
        android:drawable="@drawable/overflow_pressed" />
    <item 
        android:drawable="@drawable/overflow" />
</selector>

将您更改onClick(View)为：

@Override
public void onClick(final View view) {
    switch (view.getId()) {
        case R.id.justin_menu_button:

            if (button.isSelected()) {
                button.setSelected(false);
                isPreferences = false;
                mPreferencesMenuHelper.hideMenu();
                Log.i("ImageButtonCheck", "Button is not selected anymore");
            } else {
                button.setSelected(true);
                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;
                Log.i("ImageButtonCheck", "Button is in selected state");
            }

            break;
        default:
            break;
    }
}

更改onMenuItemClicked(int)为：

@Override
public void onMenuItemClicked(final int position) {
    if (isPreferences) {
        switch (position) {
            case PreferenceMenuItems.JUSTIN_PREFERENCES_POSITION:
                PreferencesActivity.newInstance(getActivity());
                break;
            default:
                break;
        }
        isPreferences = false;
        button.setSelected(false);
        mPreferencesMenuHelper.hideMenu();
        Log.i("ImageButtonCheck", "Button is not in a selected state because of a menu item click");
    } 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();
    }
}

我认为这里的问题是，当第一次按下按钮时，达到了选中状态并显示了菜单。但是，在显示菜单时再次单击该按钮不会调用该onClick(View)方法。我在上面的代码中包含了 3 个日志语句。当您单击一次按钮以显示菜单并再次单击菜单以隐藏它时，让我知道您在 logcat 中看到的输出。这两次点击的输出应该是"Button is in selected state"和"Button is not selected anymore"。

编辑 2：

在你的活动类中包含MenuHelper一个内部类：

public class MenuHelper implements OnItemClickListener, Dialog.OnDismissListener {

    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);
        mMenu.setOnDismissListener(this);  -------------------------> **add this**
        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);
    }

    @Override
    public void onDismiss(DialogInterface arg0) {
        button.setSelected(false);
    }

}
于 2013-07-25T00:04:31.253 回答