Firebase权限被拒绝错误

本文介绍了Firebase权限被拒绝错误的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

但是每次都会显示相同的错误。

  W / SyncTree：在/ child失败时收听：FirebaseError：Permission denied

我的firebase规则

  {
Condition：sunny，
child：5 
}

我的AndroidManifest.xml

 <？xml version =1.0encoding =utf-8？> 
< manifest xmlns：android =http://schemas.android.com/apk/res/android
 package =com.mohit.firebase> 
 
<使用权限android：name =android.permission.INTERNET/> 
 
应用程序$ b $ android：allowBackup =true
 android：icon =@ mipmap / ic_launcher
 android：label =@ string / app_name 
 android：supportsRtl =true
 android：theme =@ style / AppTheme
> 
< activity android：name =。MainActivity> 
< intent-filter> 
  
< category android：name =android.intent.category.LAUNCHER/> 
< / intent-filter> 
< / activity> 
< / application> 
 
< / manifest>

我的mainactivity.java
包com.mohit.firebase;

  import android.support.v7.app.AppCompatActivity; 
导入android.os.Bundle; 
导入android.util.Log; 
导入android.view.View; 
导入android.widget.Button; 
导入android.widget.TextView; 
 
导入com.firebase.client.DataSnapshot; 
 import com.firebase.client.Firebase; 
 import com.firebase.client.FirebaseError; 
 import com.firebase.client.ValueEventListener; 
 
公共类MainActivity扩展AppCompatActivity {
 
 TextView tv; 
按钮bt1; 
按钮bt2; 
 Firebase mRootRef; 
 
 @Override 
 protected void onCreate（Bundle savedInstanceState）{
 super.onCreate（savedInstanceState）; 
 setContentView（R.layout.activity_main）; 
 
 tv =（TextView）findViewById（R.id.button）; 
 bt1 =（Button）findViewById（R.id.button）; 
 bt2 =（Button）findViewById（R.id.button2）; 
 Firebase.setAndroidContext（this）; 
 mRootRef =新的Firebase（https://superb-flag-126719.firebaseio.com/）; 
 Log.d（fb，Firebase Object：+ String.valueOf（mRootRef））; 
 
 
 $ b @Override 
 protected void onStart（）{
 super.onStart（）; 
 
 Firebase mchild = mRootRef.child（child）; 
 mchild.addValueEventListener（new ValueEventListener（）{
 @Override 
 public void onDataChange（DataSnapshot dataSnapshot）{
 String condition =（String）dataSnapshot.getValue（）; 
 Log.d（fb，String get：+ condition）; 
 tv.setText（condition）; 
} 
 
 @Override 
 public void onCancelled（FirebaseError firebaseError）{
 
 
}）; 
 
 
 $ / code $ / pre 
 
我的BuildGraddle 
 
 
  apply plugin：'com.android.application'
 
 android {
 compileSdkVersion 23 
 buildToolsVersion23.0.2 
 
 defaultConfig {
 applicationIdcom.mohit.firebase
 minSdkVersion 16 
 targetSdkVersion 23 
 versionCode 1 
 versionName1.0
} 
 buildTypes {
 release {
 minifyEnabled false 
 proguardFiles getDefaultProguardFile（'proguard-android.txt'），'proguard-rules.pro'
} 
} 
 packagingOptions {
不包括'META-INF / LICENSE'
不包括'META-INF / LICENSE-FIREBASE.txt'
'META-INF / NOTICE '
} 
} 
 
 
依赖关系{
编译fileTree（dir：'libs'，include：['* .jar']）
 testCompile'junit：junit：4.12'
c ompile'com.android.support:appcompat-v7:23.1.1'
 compile'com.firebase：firebase-client-android：2.5.2+'
} 
  
我检查了我的firebase网址。这是完全正确的。
解决方案
这是因为您没有授权到数据库，检查实时数据库中的规则选项卡
 
 
 如果它是 
 
  {
rules：{
.read：auth！= null，
.write：auth！= null
} 
} 
  
 
 
 这意味着只有经过授权的用户才能写入和读取数据。
 
 
 更改为  {
rules：{
.read：true，
.write ：true 
 
 
 
 
 
 
 允许任何人编写数据库
 
 
  在进行制作时，请务必使用第一个  
I am Very beginner to firebase and trying to get value from my database.

but it showing me same error every time.
    W/SyncTree: Listen at /child failed: FirebaseError: Permission denied
My firebase rules
    {
  "Condition" : "sunny",
  "child" : 5
}
my Androidmanifest.xml
    <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.mohit.firebase" >

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

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

</manifest>
My mainactivity.javapackage com.mohit.firebase;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import com.firebase.client.DataSnapshot;
import com.firebase.client.Firebase;
import com.firebase.client.FirebaseError;
import com.firebase.client.ValueEventListener;

public class MainActivity extends AppCompatActivity {

    TextView tv;
    Button bt1;
    Button bt2;
    Firebase mRootRef;

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

        tv = (TextView) findViewById(R.id.button);
        bt1 = (Button) findViewById(R.id.button);
        bt2 = (Button) findViewById(R.id.button2);
        Firebase.setAndroidContext(this);
        mRootRef = new Firebase("https://superb-flag-126719.firebaseio.com/");
        Log.d("fb","Firebase Object: "  + String.valueOf(mRootRef));

    }

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

        Firebase mchild = mRootRef.child("child");
        mchild.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                String condition = (String) dataSnapshot.getValue();
                Log.d("fb","String get: " + condition);
                tv.setText(condition);
            }

            @Override
            public void onCancelled(FirebaseError firebaseError) {

            }
        });
    }
}
my BuildGraddle
    apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"

    defaultConfig {
        applicationId "com.mohit.firebase"
        minSdkVersion 16
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    packagingOptions {
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/LICENSE-FIREBASE.txt'
        exclude 'META-INF/NOTICE'
    }
}


dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.1.1'
    compile 'com.firebase:firebase-client-android:2.5.2+'
}
i checked my firebase url. It's Perfectly Correct.
 解决方案 
It's because you are not authorized to the Database, check the Rules Tab in the Realtime database
If it's 
{
  "rules": {
    ".read": "auth != null",
    ".write":"auth != null"
  }
}
This means only authorized user's can write and read the Data.
Changing to 
{
  "rules": {
    ".read": true,
    ".write":true
  }
}
Allows anyone to write the Database
When going for Production be sure to use the first one
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