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私は自分のアプリケーションとFacebookの統合を試みています。 アクティビティ内にあるフラグメント内にログインボタンがあります。SharedPreference、facebook integration、NullPointerException
私は私の主な活動に戻り、私のフェイスブックの活動に戻ってきます。 nullポインタ例外が発生します。 共有の設定を使用して、ユーザーのデータを保持し、特定のtextViewsに設定します。上記フラグメントとFacebookのログインと
断片（私は質問のために輸入を削除）
public class Profilee extends Fragment {
static String email1, birthday1, gender1;
ImageView imageView;
static int itis = 1;
TextView texty;
LoginButton button;
LinearLayout userinput;
private CallbackManager callbackManager;
private TextView textView;
SharedPreferences pref;
private TextView email, birthday, gende;
private AccessTokenTracker accessTokenTracker;
private ProfileTracker profileTracker;
static String mail,gender,name;
private FacebookCallback<LoginResult> callback = new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
AccessToken accessToken = loginResult.getAccessToken();
Profile profile = Profile.getCurrentProfile();
GraphRequest graphrequest = GraphRequest.newMeRequest(loginResult.getAccessToken(),
new GraphRequest.GraphJSONObjectCallback() {
@Override
public void onCompleted(JSONObject object, GraphResponse response) {
JSONObject jsonObject = response.getJSONObject();
if (jsonObject != null) {
try {
email1 = jsonObject.getString("email");
gender1 = jsonObject.getString("gender");
birthday1 = jsonObject.getString("birthday");
} catch (JSONException e) {
e.printStackTrace();
}
}
}
});
Bundle parameters = new Bundle();
parameters.putString("fields", "email, gender, birthday");
graphrequest.setParameters(parameters);
graphrequest.executeAsync();
AppEventsLogger.activateApp(getContext());
}
@Override
public void onCancel() {
}
@Override
public void onError(FacebookException e) {
}
};
public Profilee() {
// Required empty public constructor
}
public boolean m;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FacebookSdk.sdkInitialize(getActivity().getApplicationContext());
callbackManager = CallbackManager.Factory.create();
Toast.makeText(getContext(), "Create", Toast.LENGTH_SHORT).show();
pref = getContext().getSharedPreferences("hello", getContext().MODE_PRIVATE);
pref.getString("name", "asdfgh");
pref.getString("email", "qwerty");
pref.getString("gender", "zxcvb");
accessTokenTracker = new AccessTokenTracker() {
@Override
protected void onCurrentAccessTokenChanged(AccessToken oldToken, AccessToken newToken) {
}
};
profileTracker = new ProfileTracker() {
@Override
protected void onCurrentProfileChanged(Profile oldProfile, Profile newProfile) {
}
};
accessTokenTracker.startTracking();
profileTracker.startTracking();
onResume();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_profilee, container, false);
button = (LoginButton) v.findViewById(R.id.login_button);
TextView button12 = (TextView) v.findViewById(R.id.edit);
button12.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(getContext(), PrifileEdit.class);
i.putExtra("st", email1);
startActivity(i);
}
});
texty = (TextView) v.findViewById(R.id.emo);
imageView = (ImageView) v.findViewById(R.id.asd);
userinput = (LinearLayout) v.findViewById(R.id.userdetail);
int unicode = 0x1F60E;
String emoji = getEmijoByUnicode(unicode);
String text = "We will never post on your wall without permission ";
texty.setText(text + emoji);
Toast.makeText(getContext(), "CreateView", Toast.LENGTH_SHORT).show();
return v;
}
public String getEmijoByUnicode(int unicode) {
return new String(Character.toChars(unicode));
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
LoginButton loginButton = (LoginButton) view.findViewById(R.id.login_button);
textView = (TextView) view.findViewById(R.id.textView);
email = (TextView) view.findViewById(R.id.emailid);
gende = (TextView) view.findViewById(R.id.gender);
birthday = (TextView) view.findViewById(R.id.birth);
loginButton.setReadPermissions("email");
loginButton.setFragment(this);
loginButton.registerCallback(callbackManager, callback);
Toast.makeText(getContext(), "ViewCreate", Toast.LENGTH_SHORT).show();
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
callbackManager.onActivityResult(requestCode, resultCode, data);
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
onResume();
}
}, 2000);
}
public void displayMessage(final Profile profile) {
pref = getContext().getSharedPreferences("hello", getContext().MODE_PRIVATE);
SharedPreferences.Editor editor = pref.edit();
m=pref.getBoolean("key",true);
if(m==true) {
if (profile != null) {
textView.setText(profile.getName());
email.setText(email1);
gende.setText(gender1);
birthday.setText(birthday1);
button.setVisibility(View.GONE);
texty.setVisibility(View.GONE);
userinput.setVisibility(View.VISIBLE);
pref = getContext().getSharedPreferences("hello", getContext().MODE_PRIVATE);
editor.putString("email",email1);
editor.putString("name",profile.getName());
editor.putString("gender",gender1);
editor.putBoolean("key",false);
editor.commit();
}
} else if(m==false){
mail=pref.getString("email","lol1");
gender=pref.getString("gender","lol2");
name=pref.getString("name","lol3");
textView.setText(name);
email.setText(mail);
gende.setText(gender);
}
}
@Override
public void onStart() {
super.onStart();
Toast.makeText(getContext(), "Start", Toast.LENGTH_SHORT).show();
}
@Override
public void onStop() {
super.onStop();
accessTokenTracker.stopTracking();
profileTracker.stopTracking();
}
@Override
public void onResume() {
super.onResume();
Profile profile = Profile.getCurrentProfile();
displayMessage(profile);
AppEventsLogger.activateApp(getContext());
}
}
Acitivty
public class Profile extends AppCompatActivity {
private ViewPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;
TextView textView, textView2;
SharedPreferences sp;
private static String totalurl = "random.com/l.php";
public static final String MyPREFERENCES = "User" ;
public static final String UserID = "UserIDKey";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
ActionBar actionBar = getSupportActionBar();
if (actionBar != null) {
actionBar.setHomeButtonEnabled(true);
actionBar.setDisplayHomeAsUpEnabled(true);
}
mSectionsPagerAdapter = new ViewPagerAdapter(getSupportFragmentManager());
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
setupViewPager(mViewPager);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
textView = (TextView) findViewById(R.id.redeem);
SharedPreferences sp = getSharedPreferences("User", Context.MODE_PRIVATE);
totalearn();
textView.setText("₹ " + sp.getString("A_EARN", ""));
textView2.setText("₹ "+sp.getString("T_EARN",""));
}
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new Profilee(), "PROFILE");
adapter.addFragment(new Redeem(), "REDEEM");
//adapter.addFragment(new History(), "HISTORY");
viewPager.setAdapter(adapter);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
switch (item.getItemId()) {
case android.R.id.home:
finish();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
public class ViewPagerAdapter extends FragmentPagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
public void addFragment(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
@Override
public int getCount() {
return mFragmentList.size();
}
@Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
public void redeem(View v){
Intent internet = new Intent();
internet.setAction(Intent.ACTION_VIEW);
internet.addCategory(Intent.CATEGORY_BROWSABLE);
internet.setData("my"));
startActivity(internet);
}
}
LogCAT
FATAL EXCEPTION: mainProcess: earn.free.cashback.snapcash, PID: 3959
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference
at earn.free.cashback.snapcash.fragments.Profilee.displayMessage(Profilee.java:241)
at earn.free.cashback.snapcash.fragments.Profilee.onResume(Profilee.java:268)
at earn.free.cashback.snapcash.fragments.Profilee.onCreate(Profilee.java:149)
at android.support.v4.app.Fragment.performCreate(Fragment.java:1951)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1029)
at android.support.v4.app.FragmentManagerImpl.performPendingDeferredStart(FragmentManager.java:926)
at android.support.v4.app.Fragment.setUserVisibleHint(Fragment.java:876)
at android.support.v4.app.FragmentPagerAdapter.setPrimaryItem(FragmentPagerAdapter.java:130)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1175)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1025)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1545)
at android.view.View.measure(View.java:17430)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.support.design.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:664)
at android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:731)
at android.view.View.measure(View.java:17430)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135)
at android.view.View.measure(View.java:17430)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17430)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
at android.view.View.measure(View.java:17430)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17430)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2560)
at android.view.View.measure(View.java:17430)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2001)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1166)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1372)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1054)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5779)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Choreographer.java:580)
at android.view.Choreographer.doFrame(Choreographer.java:550)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
投稿スタックトレースを完全 –
は、TextViewの参照がnullであるか、あなたが渡している値がnull – Eenvincible
ええ、そのヌルが、なぜ、しようとしています表示されますsharedPreferencesの変数に値を保存するには... – Bawa