在为 Android Wear 创建表盘时，我想要一个简单的配置（拨动开关？）来设置用户希望表盘看起来像哪种模式（例如，白色或黑色表盘）。
我希望拨动开关位于手表本身，不希望与手机进行如此简单的通信，并希望避免手表和手机之间的所有 GoogleApiClient 通信。有没有办法轻松做到这一点，类似于在 Android 上进行 Settings 或 SharedPreferences？
我尝试使用广播接收器。我可以在广播接收器中获取更改，但如何让 CanvasWatchFaceService.Engine 更新？
【问题讨论】：
是的，这是可能的。 你必须关注this documentation。
首先创建一个Activity，显示您希望用户更改的设置。
然后在您的 Manifest 文件中，将此元数据添加到您的 Watchface 服务：
<meta-data
android:name=
"com.google.android.wearable.watchface.wearableConfigurationAction"
android:value=
"com.example.android.wearable.watchface.CONFIG_DIGITAL" />
还有这个IntentFilter 给你的Activity：
<intent-filter>
<action android:name=
"com.example.android.wearable.watchface.CONFIG_DIGITAL" />
<category android:name=
"com.google.android.wearable.watchface.category.WEARABLE_CONFIGURATION" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
当然，您必须将“com.example.android”替换为您的包名。
然后，在表盘选择器屏幕的表盘预览下方会出现一个小的设置图标。
不要忘记同步 Activity 和 Watchface 之间的设置，以使其立即显示（例如 BroadcastReceiver）
【讨论】：
我通过注册 3 个意图的 LocalBroadcastManager 解决了这个问题
所有东西都封装在一个类中，该类公开了两个交互接口（一个用于 Watch Service，另一个用于 Config Activity。可能不是最简单的解决方案，但经过 3 天的挖掘，我能想出最好的解决方案 :(
作为记录，这里是共享 2 个变量（bezelMode 和 time24）的类。
您将需要从您的监视服务（实现 WatchConfig.Service）和配置活动（实现 WatchConfig.Editor）中实例化它
通信基于LocalBroadcastManager
public class WatchConfig {
// private static final String TAG = "Config";
// Used when data has changed
public static final String CONFIG_DATA_CHANGED = "/config/changed";
// Used to provide initial data
public static final String CONFIG_INITIAL_DATA = "/config/inital-data";
// Used to query initial data
public static final String CONFIG_INITIAL_QUERY = "/config/initial-query";
private int m_BezelMode;
private boolean m_Time24;
private LocalBroadcastManager localBroadcastManager;
BroadcastReceiver broadcastReceiverDataChanged;
BroadcastReceiver broadcastReceiverInitialDataRequest;
BroadcastReceiver broadcastReceiverInitialData;
private Service service;
private Editor editor;
WatchConfig(Context context, Service service) {
initialize( context, service, null);
}
WatchConfig(Context context, Editor editor) {
initialize( context, null, editor);
}
void initialize( Context context, Service service, Editor editor) {
this.localBroadcastManager = LocalBroadcastManager.getInstance( context);
this.service = service;
this.editor = editor;
}
interface Service {
void onConfigDataUpdated(boolean time24, int bezelMode);
void onConfigInitialRequest();
}
interface Editor {
void onConfigInitialize(boolean time24, int bezelMode);
}
/**
* Registers all proper receivers
*/
public void connect() {
if( this.service != null) {
IntentFilter intentFilterDataChanged = new IntentFilter(CONFIG_DATA_CHANGED);
this.broadcastReceiverDataChanged = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// Log.d(TAG,"Data Changed Notification");
service.onConfigDataUpdated(intent.getBooleanExtra("time24", true), intent.getIntExtra("bezel", 24));
}
};
this.localBroadcastManager.registerReceiver(broadcastReceiverDataChanged, intentFilterDataChanged);
IntentFilter intentFilterInitialDataRequesy = new IntentFilter(CONFIG_INITIAL_QUERY);
this.broadcastReceiverInitialDataRequest = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// Log.d(TAG,"Initial Query Notification");
service.onConfigInitialRequest();
}
};
this.localBroadcastManager.registerReceiver(broadcastReceiverInitialDataRequest, intentFilterInitialDataRequesy);
} else {
this.broadcastReceiverDataChanged = null;
this.broadcastReceiverInitialDataRequest = null;
}
if( this.editor != null) {
IntentFilter intentFilterInitalData = new IntentFilter(CONFIG_INITIAL_DATA);
this.broadcastReceiverInitialData = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// Log.d(TAG,"Initial Data notification");
editor.onConfigInitialize(intent.getBooleanExtra("time24", true), intent.getIntExtra("bezel", 24));
}
};
this.localBroadcastManager.registerReceiver(broadcastReceiverInitialData, intentFilterInitalData);
// Editors need intial data
Intent intentInitialDataRequest = new Intent( CONFIG_INITIAL_QUERY);
this.localBroadcastManager.sendBroadcast( intentInitialDataRequest);
} else {
this.broadcastReceiverInitialData = null;
}
}
public void disconnect() {
if( this.broadcastReceiverDataChanged != null) {
this.localBroadcastManager.unregisterReceiver(this.broadcastReceiverDataChanged);
}
if( this.broadcastReceiverInitialDataRequest != null) {
this.localBroadcastManager.unregisterReceiver(this.broadcastReceiverInitialDataRequest);
}
if( this.broadcastReceiverInitialData != null) {
this.localBroadcastManager.unregisterReceiver(this.broadcastReceiverInitialData);
}
}
/**
* Used to publish changes in configuration
*/
protected void publishInitialData(boolean time24, int bezel) {
this.m_Time24 = time24;
this.m_BezelMode = bezel;
Intent intent = new Intent( CONFIG_INITIAL_DATA);
intent.putExtra("time24", this.m_Time24);
intent.putExtra("bezel", this.m_BezelMode);
this.localBroadcastManager.sendBroadcast(intent);
}
/**
* Used to publish changes in configuration
*/
protected void publishUpdate() {
Intent intent = new Intent( CONFIG_DATA_CHANGED);
intent.putExtra("time24", this.m_Time24);
intent.putExtra("bezel", this.m_BezelMode);
this.localBroadcastManager.sendBroadcast(intent);
}
public void setTime24(boolean time24) {
this.m_Time24 = time24;
}
public void setBezelMode(int bezelMode) {
this.m_BezelMode = bezelMode;
}
}
【讨论】：