| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.systemui.statusbar; |
| |
| import android.content.res.Configuration; |
| import android.provider.Settings; |
| import android.util.Log; |
| |
| import com.android.systemui.R; |
| import com.android.systemui.SystemUI; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| |
| /** |
| * Ensure a single status bar service implementation is running at all times. |
| * |
| * <p>The implementation either comes from a service component running in a remote process (defined |
| * using a secure setting), else falls back to using the in-process implementation according |
| * to the product config. |
| */ |
| public class SystemBars extends SystemUI implements ServiceMonitor.Callbacks { |
| private static final String TAG = "SystemBars"; |
| private static final boolean DEBUG = false; |
| private static final int WAIT_FOR_BARS_TO_DIE = 500; |
| |
| // manages the implementation coming from the remote process |
| private ServiceMonitor mServiceMonitor; |
| |
| // in-process fallback implementation, per the product config |
| private BaseStatusBar mStatusBar; |
| |
| @Override |
| public void start() { |
| if (DEBUG) Log.d(TAG, "start"); |
| mServiceMonitor = new ServiceMonitor(TAG, DEBUG, |
| mContext, Settings.Secure.BAR_SERVICE_COMPONENT, this); |
| mServiceMonitor.start(); // will call onNoService if no remote service is found |
| } |
| |
| @Override |
| public void onNoService() { |
| if (DEBUG) Log.d(TAG, "onNoService"); |
| createStatusBarFromConfig(); // fallback to using an in-process implementation |
| } |
| |
| @Override |
| public long onServiceStartAttempt() { |
| if (DEBUG) Log.d(TAG, "onServiceStartAttempt mStatusBar="+mStatusBar); |
| if (mStatusBar != null) { |
| // tear down the in-process version, we'll recreate it again if needed |
| mStatusBar.destroy(); |
| mStatusBar = null; |
| return WAIT_FOR_BARS_TO_DIE; |
| } |
| return 0; |
| } |
| |
| @Override |
| protected void onConfigurationChanged(Configuration newConfig) { |
| if (mStatusBar != null) { |
| mStatusBar.onConfigurationChanged(newConfig); |
| } |
| } |
| |
| @Override |
| public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| if (mStatusBar != null) { |
| mStatusBar.dump(fd, pw, args); |
| } |
| } |
| |
| private void createStatusBarFromConfig() { |
| if (DEBUG) Log.d(TAG, "createStatusBarFromConfig"); |
| final String clsName = mContext.getString(R.string.config_statusBarComponent); |
| if (clsName == null || clsName.length() == 0) { |
| throw andLog("No status bar component configured", null); |
| } |
| Class<?> cls = null; |
| try { |
| cls = mContext.getClassLoader().loadClass(clsName); |
| } catch (Throwable t) { |
| throw andLog("Error loading status bar component: " + clsName, t); |
| } |
| try { |
| mStatusBar = (BaseStatusBar) cls.newInstance(); |
| } catch (Throwable t) { |
| throw andLog("Error creating status bar component: " + clsName, t); |
| } |
| mStatusBar.mContext = mContext; |
| mStatusBar.mComponents = mComponents; |
| mStatusBar.start(); |
| if (DEBUG) Log.d(TAG, "started " + mStatusBar.getClass().getSimpleName()); |
| } |
| |
| private RuntimeException andLog(String msg, Throwable t) { |
| Log.w(TAG, msg, t); |
| throw new RuntimeException(msg, t); |
| } |
| } |