Android 10 SystemUI 如何隐藏状态栏输入法图标

代码路径：
frameworks/base/services/core/java/com/android/server/inputmethod/InputMethodManagerService.java
在InputMethodManagerService.java文件中updateStatusIcon方法中将mStatusBar.setIconVisibility(mSlotIme, true)的true改为false

@BinderThread
    private void updateStatusIcon(@NonNull IBinder token, String packageName,
            @DrawableRes int iconId) {
        synchronized (mMethodMap) {
            if (!calledWithValidTokenLocked(token)) {
                return;
            }
            final long ident = Binder.clearCallingIdentity();
            try {
                if (iconId == 0) {
                    if (DEBUG) Slog.d(TAG, "hide the small icon for the input method");
                    if (mStatusBar != null) {
                        mStatusBar.setIconVisibility(mSlotIme, false);
                    }
                } else if (packageName != null) {
                    if (DEBUG) Slog.d(TAG, "show a small icon for the input method");
                    CharSequence contentDescription = null;
                    try {
                        // Use PackageManager to load label
                        final PackageManager packageManager = mContext.getPackageManager();
                        contentDescription = packageManager.getApplicationLabel(
                                mIPackageManager.getApplicationInfo(packageName, 0,
                                        mSettings.getCurrentUserId()));
                    } catch (RemoteException e) {
                        
                    }
                    if (mStatusBar != null) {
                        mStatusBar.setIcon(mSlotIme, packageName, iconId, 0,
                                contentDescription  != null
                                        ? contentDescription.toString() : null);
                        mStatusBar.setIconVisibility(mSlotIme, true);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(ident);
            }
        }
    }