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Android Error: Unable to start activity ComponentInfo..?

 原文  2016-01-11 19:03:45  5   1    java/ android/ android-studio/ facebook-sdk-4.0

Question

I'm new to android and trying to add Facebook login in android using facebook sdk using Android studio but i'm getting this error

here is the logcat,

01-11 13:38:36.244 5656-5656/com.example.arpit.facebooklogindemo E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.arpit.facebooklogindemo/com.example.arpit.facebooklogindemo.MainActivity}: android.view.InflateException: Binary XML file line #18: Error inflating class com.facebook.login.widget.LoginButton
   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
   at android.app.ActivityThread.access$600(ActivityThread.java:141)
   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
   at android.os.Handler.dispatchMessage(Handler.java:99)
   at android.os.Looper.loop(Looper.java:137)
   at android.app.ActivityThread.main(ActivityThread.java:5103)
   at java.lang.reflect.Method.invokeNative(Native Method)
   at java.lang.reflect.Method.invoke(Method.java:525)
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
   at dalvik.system.NativeStart.main(Native Method)
Caused by: android.view.InflateException: Binary XML file line #18: Error inflating class com.facebook.login.widget.LoginButton
   at android.view.LayoutInflater.createView(LayoutInflater.java:620)
   at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
   at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
   at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
   at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
   at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
   at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:256)
   at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109)
   at com.example.arpit.facebooklogindemo.MainActivity.onCreate(MainActivity.java:26)
   at android.app.Activity.performCreate(Activity.java:5133)
   at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) 
   at android.app.ActivityThread.access$600(ActivityThread.java:141) 
   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 
   at android.os.Handler.dispatchMessage(Handler.java:99) 
   at android.os.Looper.loop(Looper.java:137) 
   at android.app.ActivityThread.main(ActivityThread.java:5103) 
   at java.lang.reflect.Method.invokeNative(Native Method) 
   at java.lang.reflect.Method.invoke(Method.java:525) 
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
   at dalvik.system.NativeStart.main(Native Method) 
Caused by: java.lang.reflect.InvocationTargetException
   at java.lang.reflect.Constructor.constructNative(Native Method)
   at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
   at android.view.LayoutInflater.createView(LayoutInflater.java:594)
   at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696) 
   at android.view.LayoutInflater.rInflate(LayoutInflater.java:755) 
   at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
   at android.view.LayoutInflater.inflate(LayoutInflater.java:397) 
   at android.view.LayoutInflater.inflate(LayoutInflater.java:353) 
   at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:256) 
   at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109) 
   at com.example.arpit.facebooklogindemo.MainActivity.onCreate(MainActivity.java:26) 
   at android.app.Activity.performCreate(Activity.java:5133) 
   at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175) 
   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) 
   at android.app.ActivityThread.access$600(ActivityThread.java:141) 
   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 
   at android.os.Handler.dispatchMessage(Handler.java:99) 
   at android.os.Looper.loop(Looper.java:137) 
   at android.app.ActivityThread.main(ActivityThread.java:5103) 
   at java.lang.reflect.Method.invokeNative(Native Method) 
   at java.lang.reflect.Method.invoke(Method.java:525) 
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
   at dalvik.system.NativeStart.main(Native Method) 
Caused by: The SDK has not been initialized, make sure to call FacebookSdk.sdkInitialize() first.
   at com.facebook.internal.Validate.sdkInitialized(Validate.java:136)
   at com.facebook.AccessTokenTracker.<init>(AccessTokenTracker.java:55)
   at com.facebook.login.widget.LoginButton$2.<init>(LoginButton.java:561)
   at com.facebook.login.widget.LoginButton.configureButton(LoginButton.java:561)
   at com.facebook.FacebookButtonBase.<init>(FacebookButtonBase.java:66)
   at com.facebook.login.widget.LoginButton.<init>(LoginButton.java:200)
   at java.lang.reflect.Constructor.constructNative(Native Method) 
   at java.lang.reflect.Constructor.newInstance(Constructor.java:417) 
   at android.view.LayoutInflater.createView(LayoutInflater.java:594) 
   at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696) 
   at android.view.LayoutInflater.rInflate(LayoutInflater.java:755) 
   at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
   at android.view.LayoutInflater.inflate(LayoutInflater.java:397) 
   at android.view.LayoutInflater.inflate(LayoutInflater.java:353) 
   at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:256) 
   at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109) 
   at com.example.arpit.facebooklogindemo.MainActivity.onCreate(MainActivity.java:26) 
   at android.app.Activity.performCreate(Activity.java:5133) 
   at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175) 
   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) 
   at android.app.ActivityThread.access$600(ActivityThread.java:141) 
   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 
   at android.os.Handler.dispatchMessage(Handler.java:99) 
   at android.os.Looper.loop(Looper.java:137) 
   at android.app.ActivityThread.main(ActivityThread.java:5103) 
   at java.lang.reflect.Method.invokeNative(Native Method) 
   at java.lang.reflect.Method.invoke(Method.java:525) 
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
   at dalvik.system.NativeStart.main(Native Method) 
01-11 13:43:37.044 5656-5656/com.example.arpit.facebooklogindemo I/Process: Sending signal. PID: 5656 SIG: 9

Here is AndroidManifest.xml,

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.arpit.facebooklogindemo">

    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

         //from http://developers.facebook.com
        <meta-data android:name="com.facebook.sdk.ApplicationId"
            android:value="@string/app_id"/>

        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        //from http://developers.facebook.com
        <activity android:name="com.facebook.FacebookActivity"
            android:configChanges=
                "keyboard|keyboardHidden|screenLayout|screenSize|orientation"
            android:theme="@android:style/Theme.Translucent.NoTitleBar"
            android:label="@string/app_name" />

    </application>

</manifest>

Here is activity_main.xml,

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.arpit.facebooklogindemo.MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        android:id="@+id/textView2" />

     //from http://developers.facebook.com
    <com.facebook.login.widget.LoginButton
        android:id="@+id/login_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Large Text"
        android:id="@+id/textView"
        android:layout_above="@+id/login_button"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="90dp" />

</RelativeLayout>

Here is MainActivity.java,

package com.example.arpit.facebooklogindemo;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;

import com.facebook.CallbackManager;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.FacebookSdk;
import com.facebook.Profile;
import com.facebook.login.LoginResult;
import com.facebook.login.widget.LoginButton;

public class MainActivity extends AppCompatActivity {

    CallbackManager callbackManager;
    LoginButton loginButton;
    TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        FacebookSdk.sdkInitialize(getApplicationContext());

        callbackManager = CallbackManager.Factory.create();

        loginButton = (LoginButton)findViewById(R.id.login_button);

        loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
            @Override
            public void onSuccess(LoginResult loginResult) {
                Profile profile = Profile.getCurrentProfile();
                if(profile != null){
                    textView = (TextView)findViewById(R.id.textView);
                    textView.setText(profile.getName());
                }
            }

            @Override
            public void onCancel() {

            }

            @Override
            public void onError(FacebookException error) {

            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data){
        super.onActivityResult(requestCode, resultCode, data);
        callbackManager.onActivityResult(requestCode, resultCode, data);
    }
}

1 answers

solution1
 0  2016-01-11 19:16:24

You have not initialized the FacebookSDK

as per Caused by: The SDK has not been initialized, make sure to call FacebookSdk.sdkInitialize() first.

the recommended approach here is to create an application Class and initialize the SDK there:

public class MyApp extends Application {

    @Override
    public void onCreate() {
        super.onCreate();

        FacebookSdk.sdkInitialize(getApplicationContext());

}

and update your AndroidManifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.arpit.facebooklogindemo">

    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:name=".MyApp"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

         //from http://developers.facebook.com
        <meta-data android:name="com.facebook.sdk.ApplicationId"
            android:value="@string/app_id"/>

        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        //from http://developers.facebook.com
        <activity android:name="com.facebook.FacebookActivity"
            android:configChanges=
                "keyboard|keyboardHidden|screenLayout|screenSize|orientation"
            android:theme="@android:style/Theme.Translucent.NoTitleBar"
            android:label="@string/app_name" />

    </application>

</manifest>

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