当我调用方法 mGoogleApiClient.connect() 时，应用程序崩溃。
以下代码复制自 www.developers.google.com
我想实现 Google 登录功能，但无法这样做。
我还编辑了 build.gradle 文件。在我的上一个应用程序中，由于这个问题，我无法添加排行榜，现在我的下一个应用程序再次需要排行榜，但这次我不能离开它。
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.drive.Drive;
import com.google.android.gms.games.Games;
import com.google.example.games.basegameutils.BaseGameUtils;
public class MenuActivity extends Activity implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, View.OnClickListener {
boolean mExplicitSignOut = false;
boolean mInSignInFlow = false; // set to true when you're in the middle of the
// sign in flow, to know you should not attempt
// to connect in onStart()
GoogleApiClient mGoogleApiClient; // initialized in onCreate
private static int RC_SIGN_IN = 9001;
private boolean mResolvingConnectionFailure = false;
private boolean mAutoStartSignInFlow = true;
private boolean mSignInClicked = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_menu);
findViewById(R.id.sign_in_button).setOnClickListener(this);
findViewById(R.id.sign_out_button).setOnClickListener(this);
// Create the Google Api Client with access to the Play Game and Drive services.
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(Games.API).addScope(Games.SCOPE_GAMES)
.addApi(Drive.API).addScope(Drive.SCOPE_APPFOLDER) // Drive API
.build();
}
@Override
protected void onStart() {
super.onStart();
if (!mInSignInFlow && !mExplicitSignOut) {
// auto sign in
//mGoogleApiClient.connect();
}
//checkButtonVisibility();
}
private void checkButtonVisibility() {
if (mGoogleApiClient != null && mGoogleApiClient.isConnected()) {
findViewById(R.id.sign_out_button).setVisibility(View.VISIBLE);
// signed in. Show the "sign out" button and explanation.
// ...
} else {
findViewById(R.id.sign_in_button).setVisibility(View.VISIBLE);
// not signed in. Show the "sign in" button and explanation.
// ...
}
}
@Override
protected void onStop() {
super.onStop();
mGoogleApiClient.disconnect();
}
@Override
public void onConnected(Bundle connectionHint) {
// show sign-out button, hide the sign-in button
findViewById(R.id.sign_in_button).setVisibility(View.GONE);
findViewById(R.id.sign_out_button).setVisibility(View.VISIBLE);
// (your code here: update UI, enable functionality that depends on sign in, etc)
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
if (mResolvingConnectionFailure) {
// Already resolving
return;
}
// If the sign in button was clicked or if auto sign-in is enabled,
// launch the sign-in flow
if (mSignInClicked || mAutoStartSignInFlow) {
mAutoStartSignInFlow = false;
mSignInClicked = false;
mResolvingConnectionFailure = true;
// Attempt to resolve the connection failure using BaseGameUtils.
// The R.string.signin_other_error value should reference a generic
// error string in your strings.xml file, such as "There was
// an issue with sign in, please try again later."
if (!BaseGameUtils.resolveConnectionFailure(this, mGoogleApiClient, connectionResult,
RC_SIGN_IN, "signin_other_error")) //R.string.signin_other_error
{
mResolvingConnectionFailure = false;
}
}
// Put code here to display the sign-in button
}
@Override
public void onConnectionSuspended(int i) {
// Attempt to reconnect
mGoogleApiClient.connect();
}
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
if (requestCode == RC_SIGN_IN) {
mSignInClicked = false;
mResolvingConnectionFailure = false;
if (resultCode == RESULT_OK) {
mGoogleApiClient.connect();
} else {
// Bring up an error dialog to alert the user that sign-in
// failed. The R.string.signin_failure should reference an error
// string in your strings.xml file that tells the user they
// could not be signed in, such as "Unable to sign in."
BaseGameUtils.showActivityResultError(this, requestCode, resultCode, RC_SIGN_IN); //R.string.signin_failure
}
}
//checkButtonVisibility();
}
// Call when the sign-in button is clicked
private void signInClicked() {
mSignInClicked = true;
mGoogleApiClient.connect();
}
// Call when the sign-out button is clicked
private void signOutclicked() {
mSignInClicked = false;
Games.signOut(mGoogleApiClient);
}
@Override
public void onClick(View view) {
if (view.getId() == R.id.sign_out_button) {
// user explicitly signed out, so turn off auto sign in
mExplicitSignOut = true;
if (mGoogleApiClient != null && mGoogleApiClient.isConnected()) {
Games.signOut(mGoogleApiClient);
mGoogleApiClient.disconnect();
}
}
if (view.getId() == R.id.sign_in_button) {
// start the asynchronous sign in flow
mSignInClicked = true;
mGoogleApiClient.connect();
}
else if (view.getId() == R.id.sign_out_button) {
// sign out.
mSignInClicked = false;
Games.signOut(mGoogleApiClient);
// show sign-in button, hide the sign-out button
findViewById(R.id.sign_in_button).setVisibility(View.VISIBLE);
findViewById(R.id.sign_out_button).setVisibility(View.GONE);
}
checkButtonVisibility();
}
}
日志猫：
06-12 09:54:03.113 4364-4364/com.example.gSignIn I/System.out﹕ Calling Method: mGoogleApiClient.connect( )
06-12 09:54:03.238 4364-4368/com.example.gSignIn D/dalvikvm﹕ GC_CONCURRENT freed 1903K, 16% free 14093K/16647K, paused 21ms+6ms, total 63ms
06-12 09:54:03.598 4364-4364/com.example.gSignIn D/AndroidRuntime﹕ Shutting down VM
06-12 09:54:03.598 4364-4364/com.example.gSignIn W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x411762a0)
06-12 09:54:03.613 4364-4364/com.example.gSignIn E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.IllegalStateException: A fatal developer error has occurred. Check the logs for further information.
at com.google.android.gms.internal.jl$h.b(Unknown Source)
at com.google.android.gms.internal.jl$h.g(Unknown Source)
at com.google.android.gms.internal.jl$b.hy(Unknown Source)
at com.google.android.gms.internal.jl$a.handleMessage(Unknown Source)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4921)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
at dalvik.system.NativeStart.main(Native Method)
显现：
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.gSignIn">
<application android:allowBackup="true" android:label="@string/app_name"
android:icon="@drawable/ic_launcher" android:theme="@style/AppTheme">
<activity android:name="com.example.gSignIn.Splash" android:label="@string/app_name" android:screenOrientation="portrait">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<activity android:name="com.example.gSignIn.MenuActivity" android:label="@string/app_name" android:screenOrientation="portrait">
<intent-filter>
<action android:name="com.example.gSignIn.MenuActivity"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
</application>
</manifest>
左侧的图标）。