Android5.1 快捷开关如何添加和刷新状态

Android 5.1的快捷开关的添加和刷新机制和Android6、Android7差不多是一样的。虽然现在Android7.0的快捷开关还没有认真的去研读，只是稍微的看了一下。Android6.0和Android7.0相比较于Android5.0的快捷开关增加了不少的代码。增加的代码主要是增加了下拉快捷面板的时候其中的一些动画，还有就是Android7.0中增加了快捷开关的自定义排序功能。但是万变不离其宗。下面切入到正题。

先看一下定制的快捷开关的UI样式。

快捷面板上面有很多的快捷开关，但是其中各个快捷开关的是如何运作的还不是很清楚。

好了言归正传。

添加快捷开关首先需要去配置文件config.xml文件中去添加快捷开关的名称。

config.xml文件的路径是：frameworks/base/packages/SystemUI/res/values/config.xml中。其关键代码如下：

<!-- The default tiles to display in QuickSettings --><string name="quick_settings_tiles_default" translatable="false">wifi,bt,data,airplane,audioprofile,hotspot,dnd,powersave,rotation,location,flashlight,takescreenshot</string>

关键的java代码主要是在： frameworks/base/packages/SystemUI/com/android/systemui/qs 下面，包括QSPanel.java、

QSTile.java、QSTileView.java等。

在手机启动的时候，首先会去加载和创建和初始化PhoneStatusBar.java （frameworks/base/packages/SystemUI/com/android/systemui/statusbar/phone/）中的控件和类。当然也包括快捷面板的

初始化操作。PhoneStatusBar中关于快捷面板的关键代码如下：

// Set up the quick settings tile panelmQSPanel = (QSPanel) mStatusBarWindow.findViewById(R.id.quick_settings_panel);//找到QSPanelif (mQSPanel != null) {

     //初始化 QSTileHostfinal QSTileHost qsh = new QSTileHost(mContext, this,mBluetoothController, mLocationController, mRotationLockController,mNetworkController, mZenModeController, mHotspotController,mCastController, mFlashlightController,mUserSwitcherController, mKeyguardMonitor,mSecurityController,/// M: add HotKnot in quicksettingmHotKnotController,/// M: add AudioProfile in quicksettingmAudioProfileController);mQSPanel.setHost(qsh);

     //通过QSTileHost获得的各个快捷开关（qsh.getTiles()）加入到QSPanel中。mQSPanel.setTiles(qsh.getTiles());

     //初始化调节屏幕亮度控制器mBrightnessMirrorController = new BrightnessMirrorController(mStatusBarWindow);mQSPanel.setBrightnessMirror(mBrightnessMirrorController);mHeader.setQSPanel(mQSPanel);qsh.setCallback(new QSTileHost.Callback() {@Overridepublic void onTilesChanged() {mQSPanel.setTiles(qsh.getTiles());}});}

通过跟踪上面的代码，我们可以看到需要通过QSTileHost去获取快捷开关（qsh.getTiles()）。那么，qsh.getTiles()

是如何去获取到各个快捷开关的呢？我们一起去看看吧。打开QSTileHost.java类。找到getTiles()方法。

 @Overridepublic Collection<QSTile<?>> getTiles() {return mTiles.values();}

mTiles的类型：

LinkedHashMap<String, QSTile<?>> mTiles = new LinkedHashMap<>();

找到mTiles是在哪赋值的，通过查找可以找到是在下面的这个类中。

@Overridepublic void onTuningChanged(String key, String newValue) {if (!TILES_SETTING.equals(key)) {return;}if (DEBUG) Log.d(TAG, "Recreating tiles");final List<String> tileSpecs = loadTileSpecs(newValue);if (tileSpecs.equals(mTileSpecs)) return;for (Map.Entry<String, QSTile<?>> tile : mTiles.entrySet()) {if (!tileSpecs.contains(tile.getKey())) {if (DEBUG) Log.d(TAG, "Destroying tile: " + tile.getKey());tile.getValue().destroy();}}final LinkedHashMap<String, QSTile<?>> newTiles = new LinkedHashMap<>();for (String tileSpec : tileSpecs) {if (mTiles.containsKey(tileSpec)) {newTiles.put(tileSpec, mTiles.get(tileSpec));} else {if (DEBUG) Log.d(TAG, "Creating tile: " + tileSpec);try {newTiles.put(tileSpec, createTile(tileSpec));} catch (Throwable t) {Log.w(TAG, "Error creating tile for spec: " + tileSpec, t);}}}mTileSpecs.clear();mTileSpecs.addAll(tileSpecs);mTiles.clear();mTiles.putAll(newTiles);if (mCallback != null) {mCallback.onTilesChanged();}}

上面最主要的两个方法是loadTileSpecs() 方法和 createTile()方法。那我们看看loadTileSpecs方法的具体作用是什么。

//loadTileSpecs() 此方法主要是去之前配置好的config.xml文件中获取各个快捷开关的名称。然后拆分字符串。

 protected List<String> loadTileSpecs(String tileList) {final Resources res = mContext.getResources();//获取Config.xml中配置需要显示的快捷开关的名称。String defaultTileList = res.getString(R.string.quick_settings_tiles_default);// M: Add extra tiles @{defaultTileList += "," + res.getString(R.string.quick_settings_tiles_extra);//default// @}/// M: Customize the quick settings tile order for operator. @{IQuickSettingsPlugin quickSettingsPlugin = PluginFactory.getQuickSettingsPlugin(mContext);defaultTileList = quickSettingsPlugin.customizeQuickSettingsTileOrder(defaultTileList);/// M: Customize the quick settings tile order for operator. @}Log.d(TAG, "loadTileSpecs() default tile list: " + defaultTileList);if (tileList == null) {tileList = res.getString(R.string.quick_settings_tiles);if (DEBUG) Log.d(TAG, "Loaded tile specs from config: " + tileList);} else {if (DEBUG) Log.d(TAG, "Loaded tile specs from setting: " + tileList);}final ArrayList<String> tiles = new ArrayList<String>();boolean addedDefault = false;for (String tile : tileList.split(",")) {tile = tile.trim();if (tile.isEmpty()) continue;if (tile.equals("default")) {if (!addedDefault) {tiles.addAll(Arrays.asList(defaultTileList.split(",")));addedDefault = true;}} else {tiles.add(tile);}}return tiles;}

//createTile() 方法的作用是创建各个快捷开关的对象。

 private QSTile<?> createTile(String tileSpec) {if (tileSpec.equals("wifi") && !WCN_DISABLED) return new WifiTile(this);else if (tileSpec.equals("bt") && !WCN_DISABLED) return new BluetoothTile(this);else if (tileSpec.equals("inversion")) return new ColorInversionTile(this);else if (tileSpec.equals("cell")) return new CellularTile(this);else if (tileSpec.equals("data")) return new DataConnectionTile(this);else if (tileSpec.equals("airplane")) return new AirplaneModeTile(this);
//        else if (tileSpec.equals("lte") && TelephonyManagerSprd.isDeviceSupportLte()) return new LteServiceTile(this);
//        else if (tileSpec.equals("lte") && isDeviceSupportLte()) return new LteServiceTile(this);else if (tileSpec.equals("rotation")) return new RotationLockTile(this);else if (tileSpec.equals("flashlight")) return new FlashlightTile(this);else if (tileSpec.equals("location") && !WCN_DISABLED) return new LocationTile(this);else if (tileSpec.equals("cast")) return new CastTile(this);else if (tileSpec.equals("hotspot")) return new HotspotTile(this);else if (tileSpec.equals("diabolo")) return new DiaboloTile(this);else if (tileSpec.equals("dnd")) return new DndTile(this);else if (tileSpec.equals("audioprofile") ) //&& SIMHelper.isMtkAudioProfilesSupport()return new AudioProfileTile(this);
//        else if (tileSpec.equals("interruption")) return new InterruptionsTile(this);else if (tileSpec.equals("powersave")) return new PowerSaveTile(this);else if (tileSpec.equals("takescreenshot")) return new TakeScreenShotTile(this);else if (tileSpec.startsWith(IntentTile.PREFIX)) return IntentTile.create(this,tileSpec);else throw new IllegalArgumentException("Bad tile spec: " + tileSpec);}

好了，经过上面的分析，终于知道配置文件的作用。知道使如何创建的了之后，但是还没有完。下面来看看他是如何

刷新和更新快捷开关的图标和文本的。

我们还是需要从上面的 PhoneStateBar.java 中的代码中继续往下分析，要分析的代码如下：

//通过QSTileHost获得的各个快捷开关（qsh.getTiles()）加入到QSPanel中。mQSPanel.setTiles(qsh.getTiles());

关键的是QSPanel.java类中的setTiles()方法。

public void setTiles(Collection<QSTile<?>> tiles) {for (TileRecord record : mRecords) {removeView(record.tileView);}mRecords.clear();int row = tiles.size() / mColumns + 1;if (mDeviderViewGroup == null) {mDeviderViewGroup = new View[row];} else {for (int i = 0; i < mDeviderViewGroup.length; i++) {removeView(mDeviderViewGroup[i]);}mDeviderViewGroup = new View[row];}for (int i = 0; i < row; i++) {addDividerLine(i);}for (QSTile<?> tile : tiles) {addTile(tile);}if (isShowingDetail()) {mDetail.bringToFront();}}

上面setTiles()方法中，需要注意的是addTile()方法。如果打开QSPanel.java 类，我们会知道QSPanel类

继承于ViewGroup的。下面我们在来看看addTile()方法的做了写什么。

private void addTile(final QSTile<?> tile) {final TileRecord r = new TileRecord();r.tile = tile;r.tileView = tile.createTileView(mContext);r.tileView.setVisibility(View.GONE);final QSTile.Callback callback = new QSTile.Callback() {@Overridepublic void onStateChanged(QSTile.State state) {if (state.visible && !mGridContentVisible) {// We don't want to show it if the content is hidden,// then we just set it to invisible, to ensure that it gets// visible againvisibility = INVISIBLE;}setTileVisibility(r.tileView, visibility);r.tileView.onStateChanged(state);}@Overridepublic void onShowDetail(boolean show) {QSPanel.this.showDetail(show, r);}@Overridepublic void onToggleStateChanged(boolean state) {if (mDetailRecord == r) {fireToggleStateChanged(state);}}@Overridepublic void onScanStateChanged(boolean state) {r.scanState = state;if (mDetailRecord == r) {fireScanStateChanged(r.scanState);}}@Overridepublic void onAnnouncementRequested(CharSequence announcement) {announceForAccessibility(announcement);}};r.tile.setCallback(callback);final View.OnClickListener click = new View.OnClickListener() {@Overridepublic void onClick(View v) {r.tile.click();}};final View.OnClickListener clickSecondary = new View.OnClickListener() {@Overridepublic void onClick(View v) {r.tile.secondaryClick();}};final View.OnLongClickListener longClick = new View.OnLongClickListener() {@Overridepublic boolean onLongClick(View v) {r.tile.longClick();return true;}};r.tileView.init(click, clickSecondary, longClick);r.tile.setListening(mListening);callback.onStateChanged(r.tile.getState());r.tile.refreshState();mRecords.add(r);addView(r.tileView);}

我们可以看到addTile()方法的最后面是调用的addView方法。说明是将各个快捷开关添加到QSPanel的ViewGroup当中。

成为QSPanel的子控件。

下面我们在来看看子控件。这里以手电筒(FlashlightTile.java)为例来说明其实如何来刷新图标和文本的。

//FlashlightTile.java

public class FlashlightTile extends QSTile<QSTile.BooleanState> implements
FlashlightController.FlashlightListener {

 ......

 @Override  protected void handleClick() {  if (ActivityManager.isUserAMonkey()) {  return; }   MetricsLogger.action(mContext, getMetricsCategory(), !mState.value);    boolean newState = !mState.value;  refreshState(newState ? UserBoolean.USER_TRUE : UserBoolean.USER_FALSE);   mFlashlightController.setFlashlight(newState);  Settings.System.putInt(mContext.getContentResolver(), "open_flashlight_by_quicksetting_panel", newState ? 1 : 0); // 1 打开 0 关闭    }

 .......

FlashlightTile.java 中用来更新手电筒图标和文本的代码是refreshState() 去刷新。当调用refreshState的时候

会去调用QSTile.java类中的freshState(Object arg)方法。

 protected final void refreshState(Object arg) {mHandler.obtainMessage(H.REFRESH_STATE, arg).sendToTarget();}

protected final class H extends Handler {private static final int SET_CALLBACK = 1;private static final int CLICK = 2;private static final int SECONDARY_CLICK = 3;private static final int LONG_CLICK = 4;private static final int REFRESH_STATE = 5;private static final int SHOW_DETAIL = 6;private static final int USER_SWITCH = 7;private static final int TOGGLE_STATE_CHANGED = 8;private static final int SCAN_STATE_CHANGED = 9;private static final int DESTROY = 10;private H(Looper looper) {super(looper);}@Overridepublic void handleMessage(Message msg) {String name = null;try {if (msg.what == SET_CALLBACK) {name = "handleSetCallback";handleSetCallback((QSTile.Callback)msg.obj);} else if (msg.what == CLICK) {name = "handleClick";mAnnounceNextStateChange = true;handleClick();} else if (msg.what == SECONDARY_CLICK) {name = "handleSecondaryClick";handleSecondaryClick();} else if (msg.what == LONG_CLICK) {name = "handleLongClick";handleLongClick();} else if (msg.what == REFRESH_STATE) {name = "handleRefreshState";handleRefreshState(msg.obj);} else if (msg.what == SHOW_DETAIL) {name = "handleShowDetail";handleShowDetail(msg.arg1 != 0);} else if (msg.what == USER_SWITCH) {name = "handleUserSwitch";handleUserSwitch(msg.arg1);} else if (msg.what == TOGGLE_STATE_CHANGED) {name = "handleToggleStateChanged";handleToggleStateChanged(msg.arg1 != 0);} else if (msg.what == SCAN_STATE_CHANGED) {name = "handleScanStateChanged";handleScanStateChanged(msg.arg1 != 0);} else if (msg.what == DESTROY) {name = "handleDestroy";handleDestroy();} else {throw new IllegalArgumentException("Unknown msg: " + msg.what);}} catch (Throwable t) {final String error = "Error in " + name;Log.w(TAG, error, t);mHost.warn(error, t);}}}

 protected void handleRefreshState(Object arg) {handleUpdateState(mTmpState, arg);final boolean changed = mTmpState.copyTo(mState);if (changed) {handleStateChanged();}}

跟踪代码，最终发现调用FlashlightTile.java中的refreState()方法，最后会调用QSTile.java的handleRefreshState

方法。handleRefreshState方法又会调用handleUpdateState和handleStateChanged() 两个方法。handleUpdateState

方法会去调用QSPanel的子控件FlashlightTile.java中的handleUpdateState方法。去重新获得图标和文本。最后调用

handleStateChanged去回调QSpanel.java 中的代码。

private void handleStateChanged() {boolean delayAnnouncement = shouldAnnouncementBeDelayed();if (mCallback != null) {mCallback.onStateChanged(mState);if (mAnnounceNextStateChange && !delayAnnouncement) {String announcement = composeChangeAnnouncement();if (announcement != null) {mCallback.onAnnouncementRequested(announcement);}}}mAnnounceNextStateChange = mAnnounceNextStateChange && delayAnnouncement;}

上边标记的橘黄色文本的地方所示，回去调用QSPanel.java中橘黄色代码的地方（当上文中描述QSPanel代码的地方

查看）。最终会调用r.tileView.onStateChanged(state)

r.tileView.onStateChanged(state);

这段代码会去调用QSTileView.java 中的onStateChanged方法。自己去查看onStateChanged源码的话，发现

其实际上是会根据传进来的参数state去更新图标和文本的。

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