要测试Android的RemoteCallbackList,您可以按照以下步骤操作:
public class MyService extends Service {
private final RemoteCallbackList<IMyCallback> mCallbacks = new RemoteCallbackList<>();
public interface IMyCallback {
void onDataReceived(String data);
}
public void addCallback(IMyCallback callback) {
mCallbacks.register(callback);
}
public void removeCallback(IMyCallback callback) {
mCallbacks.unregister(callback);
}
public void sendDataToClient(String data) {
final int N = mCallbacks.beginBroadcast();
for (int i = 0; i < N; i++) {
IMyCallback callback = mCallbacks.getBroadcastItem(i);
if (callback != null) {
callback.onDataReceived(data);
}
}
mCallbacks.finishBroadcast();
}
}
<service android:name=".MyService" />
public class MyClientActivity extends AppCompatActivity {
private MyService mService;
private boolean mBound = false;
private ServiceConnection mConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName className, IBinder service) {
MyService.LocalBinder binder = (MyService.LocalBinder) service;
mService = binder.getService();
mBound = true;
}
@Override
public void onServiceDisconnected(ComponentName arg0) {
mBound = false;
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my_client);
Intent intent = new Intent(this, MyService.class);
bindService(intent, mConnection, Context.BIND_AUTO_CREATE);
}
@Override
protected void onDestroy() {
super.onDestroy();
if (mBound) {
unbindService(mConnection);
mBound = false;
}
}
private void sendDataToService() {
if (mBound) {
mService.sendDataToClient("Hello from client!");
}
}
}
Button sendButton = findViewById(R.id.send_button);
sendButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendDataToService();
}
});
为了测试这个功能,您可以使用Android的Logcat来查看日志,或者使用调试器来跟踪回调的执行。此外,您还可以编写单元测试来验证RemoteCallbackList的功能。