我的应用程序一直崩溃，因为我添加了facebook登录按钮，请帮助，我已经尝试了我在这里看到的提示，但到目前为止没有解决问题，这是我的类文件
package glmdnigltd.globaldigitalmagazine;
/**
* Created by Theophilus on 10/15/2015.
*/
// Add this to the header of your file:
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import com.facebook.FacebookSdk;
import butterknife.ButterKnife;
import butterknife.InjectView;
public class Login extends AppCompatActivity {
private static final String TAG = "Login";
private static final int REQUEST_SIGNUP = 0;
@InjectView(R.id.input_email) EditText _emailText;
@InjectView(R.id.input_password) EditText _passwordText;
@InjectView(R.id.btn_login) Button _loginButton;
@InjectView(R.id.link_signup) TextView _signupLink;
@Override
public void onCreate(Bundle savedInstanceState) {
// Updated your class body:
super.onCreate(savedInstanceState);
FacebookSdk.sdkInitialize(getApplicationContext());
// Initialize the SDK before executing any other operations,
// especially, if you're using Facebook UI elements.
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
ButterKnife.inject(this);
_loginButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
login();
}
});
_signupLink.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Start the Signup activity
Intent intent = new Intent(getApplicationContext(), SignUp.class);
startActivityForResult(intent, REQUEST_SIGNUP);
}
});
}
public void login() {
Log.d(TAG, "Login");
if (!validate()) {
onLoginFailed();
return;
}
_loginButton.setEnabled(false);
final ProgressDialog progressDialog = new ProgressDialog(Login.this,
R.style.AppTheme);
progressDialog.setIndeterminate(true);
progressDialog.setMessage("Authenticating...");
progressDialog.show();
String email = _emailText.getText().toString();
String password = _passwordText.getText().toString();
// TODO: Implement your own authentication logic here.
new android.os.Handler().postDelayed(
new Runnable() {
public void run() {
// On complete call either onLoginSuccess or onLoginFailed
onLoginSuccess();
// onLoginFailed();
progressDialog.dismiss();
}
}, 3000);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_SIGNUP) {
if (resultCode == RESULT_OK) {
// TODO: Implement successful signup logic here
// By default we just finish the Activity and log them in automatically
this.finish();
}
}
}
@Override
public void onBackPressed() {
// Disable going back to the MainActivity
moveTaskToBack(true);
}
public void onLoginSuccess() {
_loginButton.setEnabled(true);
finish();
}
public void onLoginFailed() {
Toast.makeText(getBaseContext(), "Login failed", Toast.LENGTH_LONG).show();
_loginButton.setEnabled(true);
}
public boolean validate() {
boolean valid = true;
String email = _emailText.getText().toString();
String password = _passwordText.getText().toString();
if (email.isEmpty() || !android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches()) {
_emailText.setError("enter a valid email address");
valid = false;
} else {
_emailText.setError(null);
}
if (password.isEmpty() || password.length() < 4 || password.length() > 10) {
_passwordText.setError("between 4 and 10 alphanumeric characters");
valid = false;
} else {
_passwordText.setError(null);
}
return valid;
}
}
这是我的清单文件
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="glmdnigltd.globaldigitalmagazine" >
<uses-permission android:name="android.permission.INTERNET" />
<!-- To auto-complete the email text field in the login form with the user's emails -->
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.READ_PROFILE" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme" >
<activity android:name=".Splash" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".WelcomeActivity" >
</activity>
<activity android:name=".SignUp" />
<activity android:name=".Login"/>
<meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/facebook_app_id"/>
</application>
<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" />
<provider android:authorities="com.facebook.app.FacebookContentProvider544049405742837"
android:name="com.facebook.FacebookContentProvider"
android:exported="true" />
<activity android:name="com.facebook.LoginActivity" ></activity>
<activity
android:name=".MainActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</manifest>
这是xml文件
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:fitsSystemWindows="true">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="56dp"
android:paddingLeft="24dp"
android:paddingRight="24dp">
<ImageView android:src="@drawable/logo"
android:layout_width="wrap_content"
android:layout_height="72dp"
android:layout_marginBottom="24dp"
android:layout_gravity="center_horizontal" />
<!-- Email Label -->
<android.support.design.widget.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp">
<EditText android:id="@+id/input_email"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textEmailAddress"
android:hint="Email" />
</android.support.design.widget.TextInputLayout>
<!-- Password Label -->
<android.support.design.widget.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp">
<EditText android:id="@+id/input_password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:hint="Password"/>
</android.support.design.widget.TextInputLayout>
<android.support.v7.widget.AppCompatButton
android:id="@+id/btn_login"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="24dp"
android:layout_marginBottom="24dp"
android:padding="12dp"
android:text="Login"/>
<TextView android:id="@+id/link_signup"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="24dp"
android:text="No account yet? Create one"
android:gravity="center"
android:textSize="16dip"/>
<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_marginTop="30dp"
android:layout_marginBottom="30dp" />
</LinearLayout>
</ScrollView>
logcat的
10-16 09:05:15.618 19462-19462/? I/art: Late-enabling -Xcheck:jni
10-16 09:05:15.737 19462-19462/glmdnigltd.globaldigitalmagazine W/com.facebook.internal.Validate: FacebookActivity is not declared in the AndroidManifest.xml, please add com.facebook.FacebookActivity to your AndroidManifest.xml file. See https://developers.facebook.com/docs/android/getting-started for more info.
10-16 09:05:15.797 19462-19462/glmdnigltd.globaldigitalmagazine I/AppCompatDelegate: The Activity's LayoutInflater already has a Factory installed so we can not install AppCompat's
10-16 09:05:15.798 19462-19462/glmdnigltd.globaldigitalmagazine D/AndroidRuntime: Shutting down VM
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: FATAL EXCEPTION: main
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: Process: glmdnigltd.globaldigitalmagazine, PID: 19462
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{glmdnigltd.globaldigitalmagazine/glmdnigltd.globaldigitalmagazine.Login}: java.lang.IllegalStateException: Already attached
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at android.app.ActivityThread.access$800(ActivityThread.java:151)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at android.os.Looper.loop(Looper.java:135)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5254)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at java.lang.reflect.Method.invoke(Method.java:372)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: Caused by: java.lang.IllegalStateException: Already attached
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at android.support.v4.app.FragmentManagerImpl.attachController(FragmentManager.java:2036)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at android.support.v4.app.FragmentController.attachHost(FragmentController.java:95)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at android.support.v4.app.FragmentActivity.onCreate(FragmentActivity.java:276)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:61)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at glmdnigltd.globaldigitalmagazine.Login.onCreate(Login.java:52)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at android.app.Activity.performCreate(Activity.java:5990)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at android.app.ActivityThread.access$800(ActivityThread.java:151)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at android.os.Looper.loop(Looper.java:135)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5254)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at java.lang.reflect.Method.invoke(Method.java:372)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
10-16 09:05:15.835 19462-19462/glmdnigltd.globaldigitalmagazine E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
10-16 09:05:54.867 19462-19462/? I/Process: Sending signal. PID: 19462 SIG: 9
谢谢
答案 0 :(得分：0)
如果错误出现在Facebook登录按钮中，则重新启动eclipse或Android studio 。然后运行..