我的情况:
- 首先,我在应用中实现了 Google Plus 身份验证。我关注了quick start instructions并添加了 quick start sample app code到我的应用程序。
- 然后我想获取用户最后的已知位置。 Fused Location Provider 似乎是获取它的最现代的方式,所以我查看了 LocationUpdates.zip和 kpbird's demo code .
我的担忧:
com.google.android.gms.common.api.GoogleApiClient
和com.google.android.gms.common.GooglePlayServicesClient
命名空间引入了一些重叠事实上,如果您想使用GoogleApiClient
和LocationClient
,那么您的类(即Activity
)必须实现以下内容:GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, GooglePlayServicesClient.ConnectionCallbacks, GooglePlayServicesClient.OnConnectionFailedListener
来自两个命名空间的代码将覆盖以下内容:
@Override
public void onConnected(Bundle connectionHint) {
/* pseudo-code
if (GoogleApiClient) {
// Implementation
} else {
// Must be LocationClient
}
*/
}
@Override
public void onConnectionFailed(ConnectionResult result) {
/* pseudo-code
if (GoogleApiClient) {
// Implementation
} else {
// Must be LocationClient
}
*/
}
这样您将被迫编写代码来辨别是 GoogleApiClient
还是 LocationClient
触发了 onConnected
和 onConnectionFailed
事件处理程序。
我的问题:
- 我想保留 separation of concerns 。有更好的方法来解决这个问题吗?
最佳答案
您可以在 Activity 类中创建单独的对象成员,而不是在 Activity 类本身中实现这些接口(interface)。
public YourActivity extends Activity {
...
private GoogleApiClient.ConnectionCallbacks apiClient1 = new GoogleApiClient.ConnectionCallbacks() {
@Override
public void onConnectionSuspended(int cause) {
}
@Override
public void onConnected(Bundle connectionHint) {
}
};
private GoogleApiClient.OnConnectionFailedListener apiClient2 = new GoogleApiClient.OnConnectionFailedListener() {
@Override
public void onConnectionFailed(ConnectionResult result) {
}
};
private GooglePlayServicesClient.ConnectionCallbacks servicesClient1 = new GooglePlayServicesClient.ConnectionCallbacks() {
@Override
public void onDisconnected() {
}
@Override
public void onConnected(Bundle connectionHint) {
}
};
private GooglePlayServicesClient.OnConnectionFailedListener servicesClient2 = new GooglePlayServicesClient.OnConnectionFailedListener() {
@Override
public void onConnectionFailed(ConnectionResult result) {
}
};
...
}
然后,创建您的 GoogleApiClient
GoogleApiClient.Builder builder = new GoogleApiClient.Builder(yourContext, apiClient1, apiClient2);
builder.addApi(...).addScope(...);
GoogleApiClient apiClient = builder.build();
使用以下命令创建您的 LocationClient
LocationClient locClient = new LocationClient(yourContent, servicesClient1, servicesClient2);
关于android - GoogleApiClient 和 GooglePlayServicesClient : Can you preserve a separation of concerns?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/22733661/