android.view.inputmethod.InputMethodManager#peekInstance ( )源码实例Demo

private void toggleRadialPickerMode() {
    if (mRadialPickerModeEnabled) {
        mRadialTimePickerView.setVisibility(View.GONE);
        mRadialTimePickerHeader.setVisibility(View.GONE);
        mTextInputPickerHeader.setVisibility(View.VISIBLE);
        mTextInputPickerView.setVisibility(View.VISIBLE);
        mRadialTimePickerModeButton.setImageResource(R.drawable.btn_clock_material);
        mRadialTimePickerModeButton.setContentDescription(
                mRadialTimePickerModeEnabledDescription);
        mRadialPickerModeEnabled = false;
    } else {
        mRadialTimePickerView.setVisibility(View.VISIBLE);
        mRadialTimePickerHeader.setVisibility(View.VISIBLE);
        mTextInputPickerHeader.setVisibility(View.GONE);
        mTextInputPickerView.setVisibility(View.GONE);
        mRadialTimePickerModeButton.setImageResource(R.drawable.btn_keyboard_key_material);
        mRadialTimePickerModeButton.setContentDescription(
                mTextInputPickerModeEnabledDescription);
        updateTextInputPicker();
        InputMethodManager imm = InputMethodManager.peekInstance();
        if (imm != null) {
            imm.hideSoftInputFromWindow(mDelegator.getWindowToken(), 0);
        }
        mRadialPickerModeEnabled = true;
    }
}
 

private void updateInputState() {
    // Make sure that if the user changes the value and the IME is active
    // for one of the inputs if this widget, the IME is closed. If the user
    // changed the value via the IME and there is a next input the IME will
    // be shown, otherwise the user chose another means of changing the
    // value and having the IME up makes no sense.
    InputMethodManager inputMethodManager = InputMethodManager.peekInstance();
    if (inputMethodManager != null) {
        if (inputMethodManager.isActive(mYearSpinnerInput)) {
            mYearSpinnerInput.clearFocus();
            inputMethodManager.hideSoftInputFromWindow(mDelegator.getWindowToken(), 0);
        } else if (inputMethodManager.isActive(mMonthSpinnerInput)) {
            mMonthSpinnerInput.clearFocus();
            inputMethodManager.hideSoftInputFromWindow(mDelegator.getWindowToken(), 0);
        } else if (inputMethodManager.isActive(mDaySpinnerInput)) {
            mDaySpinnerInput.clearFocus();
            inputMethodManager.hideSoftInputFromWindow(mDelegator.getWindowToken(), 0);
        }
    }
}
 

private void updateInputState() {
    // Make sure that if the user changes the value and the IME is active
    // for one of the inputs if this widget, the IME is closed. If the user
    // changed the value via the IME and there is a next input the IME will
    // be shown, otherwise the user chose another means of changing the
    // value and having the IME up makes no sense.
    InputMethodManager inputMethodManager = InputMethodManager.peekInstance();
    if (inputMethodManager != null) {
        if (inputMethodManager.isActive(mHourSpinnerInput)) {
            mHourSpinnerInput.clearFocus();
            inputMethodManager.hideSoftInputFromWindow(mDelegator.getWindowToken(), 0);
        } else if (inputMethodManager.isActive(mMinuteSpinnerInput)) {
            mMinuteSpinnerInput.clearFocus();
            inputMethodManager.hideSoftInputFromWindow(mDelegator.getWindowToken(), 0);
        } else if (inputMethodManager.isActive(mAmPmSpinnerInput)) {
            mAmPmSpinnerInput.clearFocus();
            inputMethodManager.hideSoftInputFromWindow(mDelegator.getWindowToken(), 0);
        }
    }
}
 

/**
 * Notifies a suggestion selection.
 *
 * @hide
 */
public void notifySelection(Context context, String original, int index) {
    final Intent intent = new Intent();

    if (context == null || mNotificationTargetClassName == null) {
        return;
    }
    // Ensures that only a class in the original IME package will receive the
    // notification.
    if (mSuggestions == null || index < 0 || index >= mSuggestions.length) {
        Log.w(TAG, "Unable to notify the suggestion as the index is out of range index=" + index
                + " length=" + mSuggestions.length);
        return;
    }

    // The package name is not mandatory (legacy from JB), and if the package name
    // is missing, we try to notify the suggestion through the input method manager.
    if (mNotificationTargetPackageName != null) {
        intent.setClassName(mNotificationTargetPackageName, mNotificationTargetClassName);
        intent.setAction(SuggestionSpan.ACTION_SUGGESTION_PICKED);
        intent.putExtra(SuggestionSpan.SUGGESTION_SPAN_PICKED_BEFORE, original);
        intent.putExtra(SuggestionSpan.SUGGESTION_SPAN_PICKED_AFTER, mSuggestions[index]);
        intent.putExtra(SuggestionSpan.SUGGESTION_SPAN_PICKED_HASHCODE, hashCode());
        context.sendBroadcast(intent);
    } else {
        InputMethodManager imm = InputMethodManager.peekInstance();
        if (imm != null) {
            imm.notifySuggestionPicked(this, original, index);
        }
    }
}
 

/**
 * Shows the soft input for its input text.
 */
private void showSoftInput() {
    InputMethodManager inputMethodManager = InputMethodManager.peekInstance();
    if (inputMethodManager != null) {
        if (mHasSelectorWheel) {
            mInputText.setVisibility(View.VISIBLE);
        }
        mInputText.requestFocus();
        inputMethodManager.showSoftInput(mInputText, 0);
    }
}
 

/**
 * Hides the soft input if it is active for the input text.
 */
private void hideSoftInput() {
    InputMethodManager inputMethodManager = InputMethodManager.peekInstance();
    if (inputMethodManager != null && inputMethodManager.isActive(mInputText)) {
        inputMethodManager.hideSoftInputFromWindow(getWindowToken(), 0);
    }
    if (mHasSelectorWheel) {
        mInputText.setVisibility(View.INVISIBLE);
    }
}
 

/**
 * <p>Closes the drop down if present on screen.</p>
 */
public void dismissDropDown() {
    InputMethodManager imm = InputMethodManager.peekInstance();
    if (imm != null) {
        imm.displayCompletions(this, null);
    }
    mPopup.dismiss();
    mPopupCanBeUpdated = false;
}
 

private void buildImeCompletions() {
    final ListAdapter adapter = mAdapter;
    if (adapter != null) {
        InputMethodManager imm = InputMethodManager.peekInstance();
        if (imm != null) {
            final int count = Math.min(adapter.getCount(), 20);
            CompletionInfo[] completions = new CompletionInfo[count];
            int realCount = 0;

            for (int i = 0; i < count; i++) {
                if (adapter.isEnabled(i)) {
                    Object item = adapter.getItem(i);
                    long id = adapter.getItemId(i);
                    completions[realCount] = new CompletionInfo(id, realCount,
                            convertSelectionToString(item));
                    realCount++;
                }
            }

            if (realCount != count) {
                CompletionInfo[] tmp = new CompletionInfo[realCount];
                System.arraycopy(completions, 0, tmp, 0, realCount);
                completions = tmp;
            }

            imm.displayCompletions(this, completions);
        }
    }
}