Question

我创建了一个允许用户登录的应用，但每次我尝试运行我的应用时，它都会自动显示Activity_main.xml（如果您已成功登录，则为该页面）。

我想运行我的应用但它必须首先显示activity_main.xml（这是登录页面）而不是现在是第一页的activity_main.xml

这是我的代码：

的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.mertino11.ourapplication">

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

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

        <activity
            android:name=".MainActivity"
            android:theme="@style/AppTheme">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>

        <activity
            android:name=".AccountActivity"
            android:theme="@style/AppTheme" />
    </application>

    </manifest>

activity_account.xml（用户登录成功的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:id="@+id/activity_account"
    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.mertino11.ourapplication.AccountActivity">

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="textPersonName"
        android:text="Account Page"
        android:ems="10"
        android:id="@+id/editText"
        android:textSize="22sp"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true"
        android:textStyle="normal|bold"
        android:textAlignment="center" />
</RelativeLayout>

activity_main.xml（登录页面）

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:baselineAligned="false">

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="textEmailAddress"
        android:ems="10"
        android:id="@+id/emailField"
        android:hint="Email"
        android:paddingTop="20dp" />

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="textPassword"
        android:ems="10"
        android:id="@+id/passwordField"
        android:hint="Password"
        android:fontFamily="sans-serif"
        android:paddingTop="20dp" />

    <Button
        android:text="Login"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/loginBtn"
        android:paddingTop="20dp" />
</LinearLayout>

Java - ＆gt;类：AccountActivity（用户成功登录时的页面）

package com.example.mertino11.ourapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class AccountActivity extends AppCompatActivity {

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

Java - ＆gt;类：FireApp（我认为是Firebase设置）

package com.example.mertino11.ourapplication;

import android.app.Application;

import com.firebase.client.Firebase;

/**
 * Created by Mertino11 on 10-Dec-16.
 */

public class FireApp extends Application {

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

        Firebase.setAndroidContext(this);
    }
}

Java - ＆gt;类：主要活动（带帐户的后端日志记录）

package com.example.mertino11.ourapplication;


import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;

public class MainActivity extends AppCompatActivity {

    private EditText mEmailField;
    private EditText mPasswordField;

    private Button mLoginBtn;

    private FirebaseAuth mAuth;

    private FirebaseAuth.AuthStateListener mAuthListener;

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

        mAuth = FirebaseAuth.getInstance();

        mEmailField = (EditText) findViewById(R.id.emailField);
        mPasswordField = (EditText) findViewById(R.id.passwordField);

        mLoginBtn = (Button) findViewById(R.id.loginBtn);

        mAuthListener = new FirebaseAuth.AuthStateListener() {
            @Override
            public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {

                if(firebaseAuth.getCurrentUser() != null) {

                    startActivity(new Intent(MainActivity.this, AccountActivity.class));

                }
            }
        };

        mLoginBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                startSignIn();

            }
        });
    }

    @Override
    protected void onStart() {
        super.onStart();

        mAuth.addAuthStateListener(mAuthListener);
    }

    private void startSignIn() {

        String email = mEmailField.getText().toString();
        String password = mPasswordField.getText().toString();

        if(TextUtils.isEmpty(email) || TextUtils.isEmpty(password)) {

            Toast.makeText(MainActivity.this, "Fields are empty!", Toast.LENGTH_LONG).show();

        } else {
            mAuth.signInWithEmailAndPassword(email, password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
                @Override
                public void onComplete(@NonNull Task<AuthResult> task) {

                    if(!task.isSuccessful()){

                        Toast.makeText(MainActivity.this, "Sign In Problem!", Toast.LENGTH_LONG).show();
                    }
                }
            });
        }



    }
}

登录运行

12/10 16:35:26: Launching app
$ adb push C:\Users\Mertino11\Downloads\OurApplication\app\build\outputs\apk\app-debug.apk /data/local/tmp/com.example.mertino11.ourapplication
$ adb shell pm install -r "/data/local/tmp/com.example.mertino11.ourapplication"
Success


$ adb shell am start -n "com.example.mertino11.ourapplication/com.example.mertino11.ourapplication.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Client not ready yet..Waiting for process to come online
Connected to process 2403 on device emulator-5554
W/System: ClassLoader referenced unknown path: /data/app/com.example.mertino11.ourapplication-1/lib/x86
I/InstantRun: Instant Run Runtime started. Android package is com.example.mertino11.ourapplication, real application class is com.example.mertino11.ourapplication.FireApp.

              [ 12-10 16:35:30.033  1550: 1571 D/         ]
              HostConnection::get() New Host Connection established 0x89bee200, tid 1571
W/System: ClassLoader referenced unknown path: /data/app/com.example.mertino11.ourapplication-1/lib/x86
W/DynamiteModule: Local module descriptor class for com.google.firebase.auth not found.
W/DynamiteModule: Local module descriptor class for com.google.firebase.auth not found.
W/System: ClassLoader referenced unknown path: /system/priv-app/PrebuiltGmsCore/lib/x86
D/FirebaseApp: com.google.firebase.crash.FirebaseCrash is not linked. Skipping initialization.
W/System: ClassLoader referenced unknown path: 
W/System: ClassLoader referenced unknown path: /system/priv-app/PrebuiltGmsCore/lib/x86
I/FA: App measurement is starting up, version: 10084
I/FA: To enable debug logging run: adb shell setprop log.tag.FA VERBOSE
D/FA: Debug-level message logging enabled
D/FA: AppMeasurement singleton hash: 174613062
I/art: Background sticky concurrent mark sweep GC freed 21982(2MB) AllocSpace objects, 55(1056KB) LOS objects, 34% free, 7MB/11MB, paused 7.752ms total 131.168ms
V/FA: Collection enabled
V/FA: App package, google app id: com.example.mertino11.ourapplication, 1:113712880364:android:c60a6cfc3967db90
I/FA: To enable faster debug mode event logging run:
        adb shell setprop debug.firebase.analytics.app com.example.mertino11.ourapplication
V/FA: Registered activity lifecycle callback
I/FirebaseInitProvider: FirebaseApp initialization successful
V/FA: Using measurement service
V/FA: Connecting to remote service
W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
V/FA: onActivityCreated
V/FA: Using measurement service
V/FA: Connection attempt already in progress
V/FA: Activity resumed, time: 29161
I/OpenGLRenderer: Initialized EGL, version 1.4
D/OpenGLRenderer: Swap behavior 1
E/EGL_emulation: tid 2587: eglSurfaceAttrib(1146): error 0x3009 (EGL_BAD_MATCH)
W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0xa71b42c0, error=EGL_BAD_MATCH
V/FA: Screen exposed for less than 1000 ms. Event not sent. time: 497
V/FA: Using measurement service
V/FA: Connection attempt already in progress
V/FA: Activity paused, time: 29657
I/Choreographer: Skipped 33 frames!  The application may be doing too much work on its main thread.
D/FA: Connected to remote service
V/FA: Processing queued up service tasks: 3
V/FA: onActivityCreated
V/FA: Activity resumed, time: 30137
E/EGL_emulation: tid 2587: eglSurfaceAttrib(1146): error 0x3009 (EGL_BAD_MATCH)
W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0xa71b42c0, error=EGL_BAD_MATCH
V/FA: Inactivity, disconnecting from the service
W/DynamiteModule: Local module descriptor class for com.google.firebase.auth not found.
V/FA: Session started, time: 39646
I/FA: Tag Manager is not found and thus will not be used
D/FA: Logging event (FE): _s, Bundle[{_o=auto, _sc=AccountActivity, _si=-1992202464745463440}]
V/FA: Using measurement service
V/FA: Connecting to remote service
D/FA: Connected to remote service
V/FA: Processing queued up service tasks: 1
V/FA: Inactivity, disconnecting from the service

项目本身层次的屏幕截图：

http://i66.tinypic.com/vor192.png

应用的方案：

创建帐户firebase Google（手动）
打开应用 - ＆gt;看到登录页面（我被困在哪里）
使用Firebase帐户详细信息登录
转到AccountActivity页面

注意：我是AndroidStudio的业余/初学者。

Answer 1

我没有正确回答问题。在manifest.xml中，

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.mertino11.ourapplication">

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

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

    <activity
        android:name=".MainActivity"
        android:theme="@style/AppTheme">
        <intent-filter>
            <action android:name="android.intent.action.MAIN"/>
            <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>
    </activity>

    <activity
        android:name=".AccountActivity"
        android:theme="@style/AppTheme" />
</application>

</manifest>

MainActivity内的意图过滤意味着MainActivity是启动器Activity

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

因此，如果您想首先启动AccountActivity，请转到

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.mertino11.ourapplication">
    <uses-permission android:name="android.permission.INTERNET" />

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

    <activity
        android:name=".MainActivity"
        android:theme="@style/AppTheme"/>

    <activity
        android:name=".AccountActivity"
        android:theme="@style/AppTheme" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN"/>
            <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>
    </activity>
</application>

</manifest>

Answer 2

1）您已经使用电子邮件和密码登录，这导致应用程序进入帐户活动

2）你可以阻止使用

FirebaseAuth.getInstance().signOut();

3）底部的更多细节FireBase

4）谢谢你

Answer 3

Button logout=(Button) findViewById(R.id.logout)
    logout.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            FirebaseAuth.getInstance().signOut();
            startActivity(new Intent(AccountActivity.this,MainActivity.class));
            finish();
        }
    });

XML

 <Button
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="logout"
  android:id="@+id/logout"/>

在AccountActivity.xml中

Android Studio：2个XML文件，但App正在启动第二个XML文件，而不是第一个

3 个答案: