我正在开发一款使用Google Play游戏服务的应用。我目前正在进行主屏幕活动，我希望登录流程的工作方式和flappy bird一样。
在flappy bird中（这只是一个例子，我确信很多其他应用程序也是这样的）...
我希望我的代码能够实现这一点，但我遇到了一些困难。首先，我的应用程序KEEPS要求我在每次开始活动时登录，它不记得我之前已经登录过。我将非常感谢以下代码的帮助。
到目前为止，这是我的代码：
public class HomeScreenActivity extends Activity implements ConnectionCallbacks, OnConnectionFailedListener {
private Button playButton, leaderboardButton;
private Context appContext;
private static final int GAME_INTENT = 1000;
private GoogleApiClient mGoogleApiClient;
// Request code to use when launching the resolution activity
private static final int REQUEST_RESOLVE_ERROR = 1001;
private static final int REQUEST_LEADERBOARD = 1002;
// Unique tag for the error dialog fragment
private static final String DIALOG_ERROR = "dialog_error";
// Bool to track whether the app is already resolving an error
private boolean mResolvingError = false;
private static final String STATE_RESOLVING_ERROR = "resolving_error";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home_screen_layout);
mResolvingError = savedInstanceState != null
&& savedInstanceState.getBoolean(STATE_RESOLVING_ERROR, false);
appContext = getApplicationContext();
findViews();
attachListeners();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(Games.API)
.addApi(Plus.API)
.addScope(Games.SCOPE_GAMES)
.addScope(Plus.SCOPE_PLUS_LOGIN)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
}
@Override
protected void onResume() {
super.onResume();
}
@Override
protected void onPause() {
super.onPause();
}
@Override
protected void onStart() {
super.onStart();
if (!mResolvingError) {
mGoogleApiClient.connect();
}
}
@Override
protected void onStop() {
mGoogleApiClient.disconnect();
super.onStop();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putBoolean(STATE_RESOLVING_ERROR, mResolvingError);
}
private void findViews() {
playButton = (Button) findViewById(R.id.play_button);
leaderboardButton = (Button) findViewById(R.id.leaderboard_button);
}
private void attachListeners() {
playButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(appContext, InGameActivity.class);
startActivityForResult(i, GAME_INTENT);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case GAME_INTENT:
// upload data to leaderboards
break;
case REQUEST_RESOLVE_ERROR:
mResolvingError = false;
if (resultCode == RESULT_OK) {
// Make sure the app is not already connected or attempting to
// connect
if (!mGoogleApiClient.isConnecting()
&& !mGoogleApiClient.isConnected()) {
mGoogleApiClient.connect();
}
}
break;
}
}
@Override
public void onConnectionFailed(ConnectionResult result) {
if (mResolvingError) {
// Already attempting to resolve an error.
return;
} else if (result.hasResolution()) {
try {
mResolvingError = true;
result.startResolutionForResult(this, REQUEST_RESOLVE_ERROR);
} catch (SendIntentException e) {
// There was an error with the resolution intent. Try again.
mGoogleApiClient.connect();
}
} else {
// Show dialog using GooglePlayServicesUtil.getErrorDialog()
showErrorDialog(result.getErrorCode());
mResolvingError = true;
}
}
@Override
public void onConnected(Bundle arg0) {
Log.d("LOG", "+++++ onConnected +++++");
leaderboardButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
startActivityForResult(Games.Leaderboards.getLeaderboardIntent(
mGoogleApiClient, getString(R.string.leaderboard_highest_score)), REQUEST_LEADERBOARD);
}
});
}
@Override
public void onConnectionSuspended(int arg0) {
Log.d("LOG", "+++++ onConnectionSuspended +++++");
leaderboardButton.setOnClickListener(null);
}
/* Creates a dialog for an error message */
private void showErrorDialog(int errorCode) {
// Create a fragment for the error dialog
ErrorDialogFragment dialogFragment = new ErrorDialogFragment();
// Pass the error that should be displayed
Bundle args = new Bundle();
args.putInt(DIALOG_ERROR, errorCode);
dialogFragment.setArguments(args);
dialogFragment.show(getFragmentManager(), "errordialog");
}
/* Called from ErrorDialogFragment when the dialog is dismissed. */
public void onDialogDismissed() {
mResolvingError = false;
}
/* A fragment to display an error dialog */
public static class ErrorDialogFragment extends DialogFragment {
public ErrorDialogFragment() { }
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Get the error code and retrieve the appropriate dialog
int errorCode = this.getArguments().getInt(DIALOG_ERROR);
return GooglePlayServicesUtil.getErrorDialog(errorCode,
this.getActivity(), REQUEST_RESOLVE_ERROR);
}
@Override
public void onDismiss(DialogInterface dialog) {
((HomeScreenActivity)getActivity()).onDialogDismissed();
}
}
}
答案 0 :(得分：1)
如果您没有使用BaseGameUtils执行登录和其他Play游戏相关任务，则需要自行维护和检查状态。这非常混乱，但您可以查看此程序包中的GameHelper类，了解Google是如何做到的。
我建议您使用BaseGameUtils包，而不是扩展BaseGameActivity，只需使用GameHelper directly。这使得使用Play游戏服务带来了很多痛苦。