我研究了谷歌加登录从https://developers.google.com/ /mobile/android/getting-started
当我启动我的应用程序时,会有一条祝酒词“用户已连接!”然后我按下G登录按钮,我的应用程序强制关闭。
这是消息表单logcat
04-08 18:31:21.680 24231-24231/app.umitems.test.testgoogleplus1.app D/﹕ onClick()
04-08 18:31:21.680 24231-24231/app.umitems.test.testgoogleplus1.app D/AndroidRuntime﹕ Shutting down VM
04-08 18:31:21.680 24231-24231/app.umitems.test.testgoogleplus1.app W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x41f99ce0)
04-08 18:31:21.685 24231-24231/app.umitems.test.testgoogleplus1.app E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: app.umitems.test.testgoogleplus1.app, PID: 24231
java.lang.NullPointerException
at app.umitems.test.testgoogleplus1.app.ExampleActivity.resolveSignInError(ExampleActivity.java:68)
at app.umitems.test.testgoogleplus1.app.ExampleActivity.onClick(ExampleActivity.java:166)
at com.google.android.gms.common.SignInButton.onClick(Unknown Source)
at android.view.View.performClick(View.java:4445)
at android.view.View$PerformClick.run(View.java:18446)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5081)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:607)
at dalvik.system.NativeStart.main(Native Method)
这是我的密码
package app.umitems.test.testgoogleplus1.app;
import android.app.Activity;
import android.content.Intent;
import android.content.IntentSender;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Toast;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesClient.ConnectionCallbacks;
import com.google.android.gms.common.GooglePlayServicesClient.OnConnectionFailedListener;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.plus.Plus;
public class ExampleActivity extends Activity implements
ConnectionCallbacks,
OnConnectionFailedListener,
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
View.OnClickListener {
/* Request code used to invoke sign in user interactions. */
private static final int RC_SIGN_IN = 0;
/* Client used to interact with Google APIs. */
private GoogleApiClient mGoogleApiClient;
/* A flag indicating that a PendingIntent is in progress and prevents
* us from starting further intents.
*/
private boolean mIntentInProgress;
/* Track whether the sign-in button has been clicked so that we know to resolve
* all issues preventing sign-in without waiting.
*/
private boolean mSignInClicked;
/* Store the connection result from onConnectionFailed callbacks so that we can
* resolve them when the user clicks sign-in.
*/
private ConnectionResult mConnectionResult;
View btn;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_example);
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(Plus.API, null)
//.addScope(Plus.SCOPE_PLUS_LOGIN)
.build();
btn = findViewById(R.id.sign_in_button);
btn.setOnClickListener(this);
}
protected void onStart() {
super.onStart();
mGoogleApiClient.connect();
}
/* A helper method to resolve the current ConnectionResult error. */
public void resolveSignInError() {
Log.d("","resolveSignInError()");
if (mConnectionResult.hasResolution()) {
Log.d("","resolveSignInError() mConnectionResult.hasResolution()");
try {
mIntentInProgress = true;
/*startIntentSenderForResult(mConnectionResult.getIntentSender(),
RC_SIGN_IN, null, 0, 0, 0);*/
mConnectionResult.startResolutionForResult(this, // your activity
RC_SIGN_IN);
} catch (IntentSender.SendIntentException e) {
// The intent was canceled before it was sent. Return to the default
// state and attempt to connect to get an updated ConnectionResult.
Log.d("","resolveSignInError() mConnectionResult.hasResolution() catch");
mIntentInProgress = false;
mGoogleApiClient.connect();
}
}
}
protected void onStop() {
super.onStop();
if (mGoogleApiClient.isConnected()) {
mGoogleApiClient.disconnect();
}
}
@Override public void onConnected(Bundle bundle){
// We've resolved any connection errors. mGoogleApiClient can be used to
// access Google APIs on behalf of the user.
mSignInClicked = false;
Toast.makeText(this, "User is connected!", Toast.LENGTH_LONG).show();
}
@Override public void onConnectionSuspended(int i){
mGoogleApiClient.connect();
}
@Override public void onDisconnected(){
}
@Override
public void onConnectionFailed(ConnectionResult result) {
if (!mIntentInProgress) {
// Store the ConnectionResult so that we can use it later when the user clicks
// 'sign-in'.
mConnectionResult = result;
if (mSignInClicked) {
// The user has already clicked 'sign-in' so we attempt to resolve all
// errors until the user is signed in, or they cancel.
resolveSignInError();
}
}
}
/*@Override
public void onConnectionFailed(ConnectionResult result){
if (!mIntentInProgress && result.hasResolution()) {
try {
mIntentInProgress = true;*//*
startIntentSenderForResult(result.getIntentSender(),
RC_SIGN_IN, null, 0, 0, 0);*//*
result.startResolutionForResult(this, // your activity
RC_SIGN_IN);
} catch (IntentSender.SendIntentException e) {
// The intent was canceled before it was sent. Return to the default
// state and attempt to connect to get an updated ConnectionResult.
mIntentInProgress = false;
mGoogleApiClient.connect();
}
}
}*/
protected void onActivityResult(int requestCode, int responseCode, Intent intent) {
if (requestCode == RC_SIGN_IN) {
if (responseCode != RESULT_OK) {
mSignInClicked = false;
}
mIntentInProgress = false;
if (!mGoogleApiClient.isConnecting()) {
mGoogleApiClient.connect();
}
}
}
@Override public void onClick(View view){
Log.d("","onClick()");
if (view.getId() == R.id.sign_in_button
&& !mGoogleApiClient.isConnecting()) {
mSignInClicked = true;
resolveSignInError();
}
}
}
我刚刚发现,该应用程序将自动连接到谷歌,而无需任何许可。我不需要按登录按钮,但我可以通过我的帐户发布。这是关于隐私的错误吗?
好啊这是因为您已经登录,并且当您单击时,您正在尝试再次登录:因为您没有要解决错误的连接结果,所以您得到了NPE。
这就是它的工作原理:
因此,如果您已连接,您应该隐藏登录按钮-用户已登录!
现在,无论出于什么原因,您都希望用户必须单击按钮才能开始。那也很好。在onClick中,您只需要测试mpluclient是否已连接。如果是的话,在登录后直接去你想做的任何事情。如果不是,则解决连接结果。
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