因此，我尝试将google的快速启动应用作为其登录API的示例应用。我选择谷歌帐户后，该应用程序确实运行但崩溃。
这就是我的logcat所说的：
09-19 11:04:27.821 21328-21328/com.google.samples.quickstart.signin E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.google.samples.quickstart.signin, PID: 21328
java.util.UnknownFormatConversionException: Conversion: i
at java.util.Formatter$FormatToken.unknownFormatConversionException(Formatter.java:1399)
at java.util.Formatter$FormatToken.checkFlags(Formatter.java:1336)
at java.util.Formatter.transform(Formatter.java:1442)
at java.util.Formatter.doFormat(Formatter.java:1081)
at java.util.Formatter.format(Formatter.java:1042)
at java.util.Formatter.format(Formatter.java:1011)
at java.lang.String.format(String.java:1999)
at android.content.res.Resources.getString(Resources.java:1542)
at android.content.Context.getString(Context.java:376)
at com.google.samples.quickstart.signin.MainActivity.showErrorDialog(MainActivity.java:237)
at com.google.samples.quickstart.signin.MainActivity.onConnectionFailed(MainActivity.java:212)
at com.google.android.gms.common.internal.zzk.zzj(Unknown Source)
at com.google.android.gms.common.api.zzg.zzf(Unknown Source)
at com.google.android.gms.common.api.zzg.zzc(Unknown Source)
at com.google.android.gms.common.api.zzg.zzc(Unknown Source)
at com.google.android.gms.common.api.zzg$zza$1.zznn(Unknown Source)
at com.google.android.gms.common.api.zzi$zzb.zzf(Unknown Source)
at com.google.android.gms.common.api.zzi$zza.handleMessage(Unknown Source)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5602)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
这是我的MainActivity.java
package com.google.samples.quickstart.signin;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentSender;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.common.Scopes;
import com.google.android.gms.common.SignInButton;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.Scope;
import com.google.android.gms.plus.Plus;
import com.google.android.gms.plus.model.people.Person;
/**
* Minimal activity demonstrating basic Google Sign-In.
*/
public class MainActivity extends AppCompatActivity implements
View.OnClickListener,
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener {
private static final String TAG = "MainActivity";
/* RequestCode for resolutions involving sign-in */
private static final int RC_SIGN_IN = 9001;
/* Keys for persisting instance variables in savedInstanceState */
private static final String KEY_IS_RESOLVING = "is_resolving";
private static final String KEY_SHOULD_RESOLVE = "should_resolve";
/* Client for accessing Google APIs */
private GoogleApiClient mGoogleApiClient;
/* View to display current status (signed-in, signed-out, disconnected, etc) */
private TextView mStatus;
/* Is there a ConnectionResult resolution in progress? */
private boolean mIsResolving = false;
/* Should we automatically resolve ConnectionResults when possible? */
private boolean mShouldResolve = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Restore from saved instance state
// [START restore_saved_instance_state]
if (savedInstanceState != null) {
mIsResolving = savedInstanceState.getBoolean(KEY_IS_RESOLVING);
mShouldResolve = savedInstanceState.getBoolean(KEY_SHOULD_RESOLVE);
}
// [END restore_saved_instance_state]
// Set up button click listeners
findViewById(R.id.sign_in_button).setOnClickListener(this);
findViewById(R.id.sign_out_button).setOnClickListener(this);
findViewById(R.id.disconnect_button).setOnClickListener(this);
// Large sign-in
((SignInButton) findViewById(R.id.sign_in_button)).setSize(SignInButton.SIZE_WIDE);
// Start with sign-in button disabled until sign-in either succeeds or fails
findViewById(R.id.sign_in_button).setEnabled(false);
// Set up view instances
mStatus = (TextView) findViewById(R.id.status);
// [START create_google_api_client]
// Build GoogleApiClient with access to basic profile
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(Plus.API)
.addScope(new Scope(Scopes.PROFILE))
.build();
// [END create_google_api_client]
}
private void updateUI(boolean isSignedIn) {
if (isSignedIn) {
// Show signed-in user's name
Person currentPerson = Plus.PeopleApi.getCurrentPerson(mGoogleApiClient);
if (currentPerson != null) {
String name = currentPerson.getDisplayName();
mStatus.setText(getString(R.string.signed_in_fmt, name));
} else {
Log.w(TAG, getString(R.string.error_null_person));
mStatus.setText(getString(R.string.signed_in_err));
}
// Set button visibility
findViewById(R.id.sign_in_button).setVisibility(View.GONE);
findViewById(R.id.sign_out_and_disconnect).setVisibility(View.VISIBLE);
} else {
// Show signed-out message
mStatus.setText(R.string.signed_out);
// Set button visibility
findViewById(R.id.sign_in_button).setEnabled(true);
findViewById(R.id.sign_in_button).setVisibility(View.VISIBLE);
findViewById(R.id.sign_out_and_disconnect).setVisibility(View.GONE);
}
}
// [START on_start_on_stop]
@Override
protected void onStart() {
super.onStart();
mGoogleApiClient.connect();
}
@Override
protected void onStop() {
super.onStop();
mGoogleApiClient.disconnect();
}
// [END on_start_on_stop]
// [START on_save_instance_state]
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putBoolean(KEY_IS_RESOLVING, mIsResolving);
outState.putBoolean(KEY_SHOULD_RESOLVE, mShouldResolve);
}
// [END on_save_instance_state]
// [START on_activity_result]
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Log.d(TAG, "onActivityResult:" + requestCode + ":" + resultCode + ":" + data);
if (requestCode == RC_SIGN_IN) {
// If the error resolution was not successful we should not resolve further errors.
if (resultCode != RESULT_OK) {
mShouldResolve = false;
}
mIsResolving = false;
mGoogleApiClient.connect();
}
}
// [END on_activity_result]
@Override
public void onConnected(Bundle bundle) {
// onConnected indicates that an account was selected on the device, that the selected
// account has granted any requested permissions to our app and that we were able to
// establish a service connection to Google Play services.
Log.d(TAG, "onConnected:" + bundle);
// Show the signed-in UI
updateUI(true);
}
@Override
public void onConnectionSuspended(int i) {
// The connection to Google Play services was lost. The GoogleApiClient will automatically
// attempt to re-connect. Any UI elements that depend on connection to Google APIs should
// be hidden or disabled until onConnected is called again.
Log.w(TAG, "onConnectionSuspended:" + i);
}
// [START on_connection_failed]
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
// Could not connect to Google Play Services. The user needs to select an account,
// grant permissions or resolve an error in order to sign in. Refer to the javadoc for
// ConnectionResult to see possible error codes.
Log.d(TAG, "onConnectionFailed:" + connectionResult);
if (!mIsResolving && mShouldResolve) {
if (connectionResult.hasResolution()) {
try {
connectionResult.startResolutionForResult(this, RC_SIGN_IN);
mIsResolving = true;
} catch (IntentSender.SendIntentException e) {
Log.e(TAG, "Could not resolve ConnectionResult.", e);
mIsResolving = false;
mGoogleApiClient.connect();
}
} else {
// Could not resolve the connection result, show the user an
// error dialog.
showErrorDialog(connectionResult);
}
} else {
// Show the signed-out UI
updateUI(false);
}
}
// [END on_connection_failed]
private void showErrorDialog(ConnectionResult connectionResult) {
int errorCode = connectionResult.getErrorCode();
if (GooglePlayServicesUtil.isUserRecoverableError(errorCode)) {
// Show the default Google Play services error dialog which may still start an intent
// on our behalf if the user can resolve the issue.
GooglePlayServicesUtil.getErrorDialog(errorCode, this, RC_SIGN_IN,
new DialogInterface.OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
mShouldResolve = false;
updateUI(false);
}
}).show();
} else {
// No default Google Play Services error, display a message to the user.
String errorString = getString(R.string.play_services_error_fmt, errorCode);
Toast.makeText(this, errorString, Toast.LENGTH_SHORT).show();
mShouldResolve = false;
updateUI(false);
}
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.sign_in_button:
// User clicked the sign-in button, so begin the sign-in process and automatically
// attempt to resolve any errors that occur.
mStatus.setText(R.string.signing_in);
// [START sign_in_clicked]
mShouldResolve = true;
mGoogleApiClient.connect();
// [END sign_in_clicked]
break;
case R.id.sign_out_button:
// Clear the default account so that GoogleApiClient will not automatically
// connect in the future.
// [START sign_out_clicked]
if (mGoogleApiClient.isConnected()) {
Plus.AccountApi.clearDefaultAccount(mGoogleApiClient);
mGoogleApiClient.disconnect();
}
// [END sign_out_clicked]
updateUI(false);
break;
case R.id.disconnect_button:
// Revoke all granted permissions and clear the default account. The user will have
// to pass the consent screen to sign in again.
// [START disconnect_clicked]
if (mGoogleApiClient.isConnected()) {
Plus.AccountApi.clearDefaultAccount(mGoogleApiClient);
Plus.AccountApi.revokeAccessAndDisconnect(mGoogleApiClient);
mGoogleApiClient.disconnect();
}
// [END disconnect_clicked]
updateUI(false);
break;
}
}
}
有人知道如何解决这个问题????
更新：这是我的strings.xml文件
<resources>
<string name="app_name">Sign-In Quickstart</string>
<string name="title_text">Google Sign-In\nQuickstart</string>
<!-- Sign-in status messages -->
<string name="signed_in_fmt">Signed in as: %s</string>
<string name="signing_in">Signing in…</string>
<string name="signed_out">Signed out</string>
<string name="signed_in_err">"Error: please check logs."</string>
<string name="error_null_person">
Error: Plus.PeopleApi.getCurrentPerson returned null. Ensure that the Google+ API is
enabled for your project, you have a properly configured google-services.json file
and that your device has an internet connection.
</string>
<!-- Google Play Services error for Toast -->
<string name="play_services_error_fmt">Google Play Services Error: %i</string>
<!-- Button labels -->
<string name="sign_out">Sign Out</string>
<string name="disconnect">Disconnect</string>
<!-- Content Description for images -->
<string name="desc_google_icon">Google Logo</string>
</resources>