setContentView(R.layout.activity_main) 上的异常；

Question

所以我的 Android 应用程序出现异常，我不知道从哪里来。 是的，我的代码现在由于试图修复它而一团糟。

不知何故，我的 setcontentview 指向某个地方，但我真的不知道在哪里以及为什么。

主活动.java

package com.example.nan.spymap;

import android.app.ActionBar;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
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.LoginManager;
import com.facebook.login.LoginResult;
import com.facebook.login.widget.LoginButton;
import com.parse.LogInCallback;
import com.parse.Parse;
import com.parse.ParseFacebookUtils;
import com.parse.ParseUser;
import com.parse.SaveCallback;
import com.parse.SignUpCallback;

import java.text.ParseException;

public class MainActivity extends FragmentActivity {

    private CallbackManager callbackManager;

    private TextView info;
    private LoginButton loginButton;
    Button mActionButton;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        Parse.initialize(this, "KEY", "KEY");
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        //final ParseUser user = new ParseUser();
        //user.setUsername("my name");
       //user.setPassword("my pass");
        //user.setEmail("email@example.com");

// other fields can be set just like with ParseObject
       // user.put("phone", "650-555-0000");
/**
 *

        user.signUpInBackground(new SignUpCallback() {
            @Override
            public void done(com.parse.ParseException e) {
                if (e == null) {
                    // Hooray! Let them use the app now.
                } else {
                    // Sign up didn't succeed. Look at the ParseException
                    // to figure out what went wrong
                }
            }
        });
 */


        ParseFacebookUtils.initialize(this);
        FacebookSdk.sdkInitialize(getApplicationContext());
        callbackManager = CallbackManager.Factory.create();


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

        loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {

            @Override
            public void onSuccess(LoginResult loginResult) {
                startActivity(new Intent(MainActivity.this, MapActivity.class));
                Profile profile = Profile.getCurrentProfile();
                Log.d("facebook id",profile.getId());
                Log.d("facebook name", profile.getFirstName());

            }

            @Override
            public void onCancel() {
                info.setText("Login attempt cancelled.");
            }

            @Override
            public void onError(FacebookException e) {
                info.setText("Login attempt failed.");
            }

        });

        mActionButton = (Button) findViewById(R.id.Sbutton);
        mActionButton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                startActivity(new Intent(MainActivity.this, SignupActivity.class));

            }
        });
        View decorView = getWindow().getDecorView();
// Hide the status bar.
        int uiOptions = View.SYSTEM_UI_FLAG_FULLSCREEN;
        decorView.setSystemUiVisibility(uiOptions);
// Remember that you should never show the action bar if the
// status bar is hidden, so hide that too if necessary.

        ActionBar actionBar = getActionBar();
        actionBar.hide();

    }

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

}

我的主要活动xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent"
    android:padding="16dp"
    android:id="@+id/spymap"
    android:background="#79dbff">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/info"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:textSize="18sp"
        />

    <com.facebook.login.widget.LoginButton
        android:id="@+id/login_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        />

    <Button
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Sign Up"
        android:id="@+id/Sbutton"
        android:layout_marginTop="40dp"
        android:layout_below="@+id/login_button"
        android:layout_centerHorizontal="true" />
    >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Get stalked"
        android:id="@+id/textView"
        android:layout_above="@+id/login_button"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="68dp" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceSmall"
        android:text="Don't worry, totally not gonna steal your data"
        android:id="@+id/textView2"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="47dp" />

</RelativeLayout>

和错误；

09-23 12:18:11.289  13106-13106/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.example.nan.spymap, PID: 13106
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.nan.spymap/com.example.nan.spymap.MainActivity}: android.view.InflateException: Binary XML file line #17: Error inflating class com.facebook.login.widget.LoginButton
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
            at android.app.ActivityThread.access$800(ActivityThread.java:151)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5254)
            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:903)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
     Caused by: android.view.InflateException: Binary XML file line #17: Error inflating class com.facebook.login.widget.LoginButton
            at android.view.LayoutInflater.createView(LayoutInflater.java:633)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
            at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:378)
            at android.app.Activity.setContentView(Activity.java:2145)
            at com.example.nan.spymap.MainActivity.onCreate(MainActivity.java:45)
            at android.app.Activity.performCreate(Activity.java:5990)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
            at android.app.ActivityThread.access$800(ActivityThread.java:151)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5254)
            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:903)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
     Caused by: java.lang.reflect.InvocationTargetException
            at java.lang.reflect.Constructor.newInstance(Native Method)
            at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
            at android.view.LayoutInflater.createView(LayoutInflater.java:607)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
            at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:378)
            at android.app.Activity.setContentView(Activity.java:2145)
            at com.example.nan.spymap.MainActivity.onCreate(MainActivity.java:45)
            at android.app.Activity.performCreate(Activity.java:5990)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
            at android.app.ActivityThread.access$800(ActivityThread.java:151)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5254)
            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:903)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
     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.newInstance(Native Method)
            at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
            at android.view.LayoutInflater.createView(LayoutInflater.java:607)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
            at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:378)
            at android.app.Activity.setContentView(Activity.java:2145)
            at com.example.nan.spymap.MainActivity.onCreate(MainActivity.java:45)
            at android.app.Activity.performCreate(Activity.java:5990)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
            at android.app.ActivityThread.access$800(ActivityThread.java:151)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5254)
            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:903)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

Answer 1

放置以下行：

FacebookSdk.sdkInitialize(getApplicationContext()); 

这在 setContentView() 之前

Answer 2

我将 oncreate 编辑为此；

@Override
    protected void onCreate(Bundle savedInstanceState) {

        FacebookSdk.sdkInitialize(this);
        Parse.initialize(this, "KEY", "KEY");
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ParseFacebookUtils.initialize(this);

它现在有效..

Answer 3

堆栈跟踪非常清楚：

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

你需要打电话

FacebookSdk.sdkInitialize(getApplicationContext());

前

setContentView(R.layout.activity_main);

Answer 4

您的堆栈跟踪状态

The SDK has not been initialized, make sure to call FacebookSdk.sdkInitialize() first.

请参阅FacebookSdk的文档：

该函数初始化 Facebook SDK，如果不调用该函数，则 Facebook SDK 函数的行为是不确定的。 应该尽早调用它。

所以只需将相关的初始化上移

@Override
protected void onCreate(Bundle savedInstanceState) {
    Parse.initialize(this, "KEY", "KEY");
    ParseFacebookUtils.initialize(this);
    FacebookSdk.sdkInitialize(getApplicationContext());
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    [...]
 }

Answer 5

您的 printstacktrace 清楚地指出Error inflating class com.facebook.login.widget.LoginButton

您正在使用自定义小部件com.facebook.login.widget.LoginButton查看其文档并检查您的充气

检查这个问题