點擊后如何將按鈕圖像從開啟切換到關閉，反之亦然？

Question

我一直試圖通過添加圖像打開並為關閉狀態添加圖像來將我的按鈕狀態從打開切換為關閉，反之亦然。 我嘗試了xml，但是我只能在點擊時暫時切換它（使用按下/焦點等）。 這是相同的代碼：

fragment_justin：

<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>

只關注圖像按鈕部分，您將看到overflow_btn。 現在overflow_btn是一個在drawable下調用的類，如下所示：

overflow_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>

使用上面的代碼后，它只在點擊時暫時切換按鈕狀態（如閃爍到overflow_pressed）並恢復為溢出。 我相信java代碼中可能需要進行一些更改才能實現，因此這里是相應的java類：

@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;
    }

知道如何去做同樣的事情嗎？

MenuHelper：

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);
    }


}

謝謝！ 賈斯汀

Answer 1

我同意@Chronos，聽起來更像是一個有兩種狀態的ToggleButton 。 保持簡單，這是我可以用來作為一個例子。 沒有必要的代碼，只需xml。

這是我布局的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="" />

現在這里是不同狀態的xml，當然在我的drawable文件夾中包含圖像。 這個名為headache_button.xml，如果上面不清楚：

<?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>

Answer 2

您可以使用以下代碼執行此操作：

// 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

    }

});

編輯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" />

由於該按鈕只有兩種狀態，請嘗試使用testdrawable而不是您在問題中發布的testdrawable狀態：

<?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>

將您的onClick(View)更改為：

@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;
    }
}

將onMenuItemClicked(int)更改為：

@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();
    }
}

我認為這里的問題是，當第一次按下按鈕時，實現所選狀態並顯示菜單。 但是，在顯示菜單時再次單擊該按鈕不會調用onClick(View)方法。 我在上面的代碼中包含了3個日志語句。 讓我知道您在logcat中看到的輸出，當您單擊按鈕一次以顯示菜單並再次單擊菜單以隱藏它時。 這兩次單擊的輸出應為"Button is in selected state"和"Button is not selected anymore" 。

編輯2 ：

將MenuHelper包含在活動類中作為內部類：

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);
    }

}

Answer 3

如果我理解得很好，你需要一個ToggleButton ，一個有兩種狀態的按鈕。

並使用像這樣的選擇器：

<?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>

Answer 4

聽起來更像是你應該使用CheckBox 。 常規按鈕沒有“開啟”狀態，只需按下並聚焦。 使用復選框，您將需要使用android:state_checked="true" 。 單擊該復選框將切換到選中狀態，再次單擊它會將其切換回默認狀態（未選中）。

在確定不能使用XML之前，請盡量不要添加額外的Java代碼。

Answer 5

如果我理解你的話，你需要一個有兩種狀態的“按鈕”，並在它們之間進行切換。

在這種情況下，它看起來更像是你想要'ToggleButton'，'CompoundButton'或'Switch'的行為。 你可以使用'android：state_checked'按照@Chronos在xml中配置它們。