作者:cfncjl_130 | 来源:互联网 | 2023-05-25 11:02
我无法将高分数提交给Android排行榜.现在排行榜是空的,没有提交任何内容.我有一个需要提交的int"oldScore".现在我正在尝试一段代码来提交它,但活动在被调用时崩溃了.我的代码:
public class GameOver extends BaseGameActivity implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {
private GoogleApiClient mGoogleApiClient;
public static int score;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_game_over);
mGoogleApiClient.connect();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(Drive.API)
.addScope(Drive.SCOPE_FILE)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
int newScore = GameOver.score;
SharedPreferences prefs = this.getSharedPreferences("myPrefsKey", Context.MODE_PRIVATE);
int oldScore = prefs.getInt("key", 0);
if (newScore > oldScore) {
SharedPreferences.Editor edit = prefs.edit();
edit.putInt("key", newScore);
edit.commit();
EditText HighScore = (EditText) findViewById(R.id.HighScoreT);
HighScore.setText("" + newScore);
} else {
EditText HighScore = (EditText) findViewById(R.id.HighScoreT);
HighScore.setText("" + oldScore);
Games.Leaderboards.submitScoreImmediate(getApiClient(),String.valueOf(R.string.number_guesses_leaderboard), oldScore);
}
}
logcat的:
引发者:java.lang.NullPointerException:尝试在空对象引用上调用接口方法'void com.google.android.gms.common.api.GoogleApiClient.connect()'
Reimeus..
11
该声明
mGoogleApiClient.connect();
应该在mGoogleApiClient
实例化之后出现
1> Reimeus..:
该声明
mGoogleApiClient.connect();
应该在mGoogleApiClient
实例化之后出现
2> Sanjeet A..:
您正在调用该方法
connect()
在对象上
mGoogleApiClient
没有实例化它
你需要先写这个,
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(Drive.API)
.addScope(Drive.SCOPE_FILE)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
那么这个,
mGoogleApiClient.connect();