new to Android Studio. I encountered a problem when testing my application. After signing in using Google Sign-In it would crash saying "Unfortunately, Aisier has stopped." I am trying to direct the user after signing in to a Navigation Drawer which also has their information such as profile picture, name and email. Am I missing some code here?
My Navigation.java:
package com.example.android.aisier;
import android.content.Intent;
import android.graphics.Typeface;
import android.support.annotation.NonNull;
import android.support.constraint.solver.SolverVariable;
import android.support.design.widget.NavigationView;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.MenuItem;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.TextView;
import com.bumptech.glide.Glide;
import com.google.android.gms.auth.api.Auth;
import com.google.android.gms.auth.api.signin.GoogleSignInAccount;
import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
import com.google.android.gms.auth.api.signin.GoogleSignInResult;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.OptionalPendingResult;
import com.google.android.gms.common.api.ResultCallback;
public class Navigation extends AppCompatActivity implements GoogleApiClient.OnConnectionFailedListener {
private DrawerLayout mDrawerLayout;
private ActionBarDrawerToggle mToggle;
private ImageView photoImageView;
private TextView nameTextView;
private TextView emailTextView;
private GoogleApiClient googleApiClient;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_navigation);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer);
mToggle = new ActionBarDrawerToggle(this,mDrawerLayout,R.string.open,R.string.close);
mDrawerLayout.addDrawerListener(mToggle);
NavigationView nvDrawer = (NavigationView) findViewById(R.id.nv);
mToggle.syncState();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
setupDrawerContent(nvDrawer);
photoImageView = (ImageView) findViewById(R.id.photoImageView);
nameTextView = (TextView) findViewById(R.id.nameTextView);
emailTextView = (TextView) findViewById(R.id.nameTextView);
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestEmail()
.build();
googleApiClient = new GoogleApiClient.Builder(this)
.enableAutoManage(this, this)
.addApi(Auth.GOOGLE_SIGN_IN_API, gso)
.build();
}
@Override
protected void onStart() {
super.onStart();
OptionalPendingResult<GoogleSignInResult> opr = Auth.GoogleSignInApi.silentSignIn(googleApiClient);
if (opr.isDone()) {
GoogleSignInResult result = opr.get();
handleSignInResult(result);
} else {
opr.setResultCallback(new ResultCallback<GoogleSignInResult>() {
@Override
public void onResult(@NonNull GoogleSignInResult googleSignInResult) {
handleSignInResult(googleSignInResult);
}
});
}
}
private void handleSignInResult(GoogleSignInResult result) {
if (result.isSuccess()) {
GoogleSignInAccount account = result.getSignInAccount();
nameTextView.setText(account.getDisplayName());
emailTextView.setText(account.getEmail());
Glide.with(this).load(account.getPhotoUrl()).into(photoImageView);
} else {
Intent intent = new Intent(this, SignIn.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
public void selectItemDrawer(MenuItem menuItem) {
Fragment myFragment = null;
Class fragmentClass;
switch (menuItem.getItemId()) {
case R.id.db:
fragmentClass = Dashboard.class;
break;
case R.id.converter:
fragmentClass = Converter.class;
break;
case R.id.location:
fragmentClass = Location.class;
break;
case R.id.translator:
fragmentClass = Translate.class;
break;
case R.id.memo:
fragmentClass = Memo.class;
break;
default:
fragmentClass = Dashboard.class;
}
try {
myFragment = (Fragment) fragmentClass.newInstance();
}
catch (Exception e) {
e.printStackTrace();
}
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.flcontent,myFragment).commit();
menuItem.setChecked(true);
setTitle(menuItem.getTitle());
mDrawerLayout.closeDrawers();
}
private void setupDrawerContent(NavigationView navigationView) {
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
selectItemDrawer(item);
return true;
}
});
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
}
}
My activity_navigation.xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.android.aisier.Navigation">
<FrameLayout
android:id="@+id/flcontent"
android:background="@drawable/background"
android:layout_width="match_parent"
android:layout_height="match_parent">
</FrameLayout>
<android.support.design.widget.NavigationView
android:id="@+id/nv"
app:headerLayout="@layout/header"
android:layout_width="264dp"
android:layout_height="match_parent"
android:background="@color/white"
app:itemTextColor="@color/darkgrey"
app:itemIconTint="@color/darkgrey"
app:menu="@menu/navigationmenu"
android:layout_gravity="start">
</android.support.design.widget.NavigationView>
</android.support.v4.widget.DrawerLayout>
My header.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="160dp"
android:background="@drawable/header"
android:padding="20dp">
<ImageView
android:id="@+id/photoImageView"
android:layout_width="75dp"
android:layout_height="75dp" />
<TextView
android:id="@+id/nameTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@color/white"
android:textStyle="bold"
android:layout_marginTop="5dp"/>
<TextView
android:id="@+id/emailTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@color/white"
android:textSize="16dp"
/>
</LinearLayout>
My LogCat:
10-29 09:04:42.606 4859-4859/com.example.android.aisier E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.android.aisier, PID: 4859 java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference at com.example.android.aisier.Navigation.handleSignInResult(Navigation.java:85) at com.example.android.aisier.Navigation.access$000(Navigation.java:30) at com.example.android.aisier.Navigation$1.onResult(Navigation.java:75) at com.example.android.aisier.Navigation$1.onResult(Navigation.java:72) at com.google.android.gms.internal.zzqq$zza.zzb(Unknown Source) at com.google.android.gms.internal.zzqq$zza.handleMessage(Unknown Source) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Any help would be appreciated!
