アンドロイドスタジオのFirebaseチャットアプリ

Question

アンドロイドスタジオFireベースを使ってメッセージングアプリを作成していますが、アプリを起動したときにmain_activityを1秒間表示してからログインページを表示すると、アプリがクラッシュしました私はここで

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

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

     <application 
      android:allowBackup="true" 
      android:icon="@mipmap/ic_launcher_icon" 
      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> 

は...ここ

がMANIFEST CODE ..です私のコードは、私はこの問題を解決するために私を助けてください、私のマニフェストに黒い何かがあると思い完璧だった私に何を助けてくださいん必要があります私の才能（プロジェクト）

// Top-level build file where you can add configuration options common to all sub-projects/modules. 

buildscript { 
    repositories { 
     jcenter() 
    } 
    dependencies { 
     classpath 'com.android.tools.build:gradle:2.1.2' 
     classpath 'com.google.gms:google-services:3.1.0' 
     // NOTE: Do not place your application dependencies here; they belong 
     // in the individual module build.gradle files 
    } 
} 

allprojects { 
    repositories { 
     jcenter() 
    } 
} 

task clean(type: Delete) { 
    delete rootProject.buildDir 
} 

ここにここに私のGradle（アプリ）

apply plugin: 'com.android.application' 

android { 
    compileSdkVersion 25 
    buildToolsVersion "25.0.3" 

    defaultConfig { 
     applicationId "com.example.syedqadri.message" 
     minSdkVersion 23 
     targetSdkVersion 25 
     versionCode 1 
     versionName "1.0" 
     multiDexEnabled true 
    } 
    buildTypes { 
     release { 
      minifyEnabled true 
      proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 
     } 
    } 
} 

dependencies { 
    compile fileTree(include: ['*.jar'], dir: 'libs') 
    testCompile 'junit:junit:4.12' 
    compile 'com.android.support:appcompat-v7:25.3.1' 
    compile 'com.android.support:design:25.3.1' 
    compile 'com.firebaseui:firebase-ui:0.6.2' 



    // compile 'com.google.android.gms:play-services-location:9.2.0' 
    //compile 'com.google.firebase:firebase-core:9.2.0' 
    //compile 'com.google.firebase:firebase-auth:9.2.0' 
    //compile 'com.google.firebase:firebase-messaging:9.2.0' 
    // compile 'com.android.support:multidex:1.0.1' 

} 

apply plugin: 'com.google.gms.google-services' 

は私のjava MainActivity.javaである。ここで

package com.example.syedqadri.message; 

import android.content.Intent; 
import android.os.Bundle; 
import android.support.annotation.NonNull; 
import android.support.design.widget.FloatingActionButton; 
import android.support.design.widget.Snackbar; 
import android.support.v7.app.AppCompatActivity; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.EditText; 
import android.widget.ListView; 
import android.widget.RelativeLayout; 
import android.widget.TextView; 
import android.text.format.DateFormat; 

import com.firebase.ui.auth.AuthUI; 
import com.firebase.ui.database.FirebaseListAdapter; 
import com.google.android.gms.tasks.OnCompleteListener; 
import com.google.android.gms.tasks.Task; 
import com.google.firebase.auth.FirebaseAuth; 
import com.google.firebase.database.FirebaseDatabase; 

public class MainActivity extends AppCompatActivity { 

    private static int SIGN_IN_REQUEST_CODE = 1; 
    private FirebaseListAdapter<chatmessage> adapter; 
    RelativeLayout activity_main; 
    FloatingActionButton sent; 


    @Override 
    public boolean onOptionsItemSelected(MenuItem item){ 

     if(item.getItemId() == R.id.menu_signout){ 
      AuthUI.getInstance().signOut(this).addOnCompleteListener(new OnCompleteListener<Void>(){ 

       @Override 
       public void onComplete(@NonNull Task<Void> task){ 

        Snackbar.make(activity_main, "You Have Been Sign Out", Snackbar.LENGTH_SHORT).show(); 
        finish(); 
       } 
      }); 
     } 
     return true; 
    } 


    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     getMenuInflater().inflate(R.menu.main_menu,menu); 
     return true; 
    } 

    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data){ 
     super.onActivityResult(requestCode, resultCode, data); 
     if(requestCode == SIGN_IN_REQUEST_CODE){ 

      if(resultCode == RESULT_OK){ 
       Snackbar.make(activity_main, "Signing in SucessFully.Welcome ...",Snackbar.LENGTH_SHORT).show(); 
       displaychatmessage(); 

      } 
      else{ 
       Snackbar.make(activity_main, "Try Again Later ...",Snackbar.LENGTH_SHORT).show(); 
       finish(); 

      } 
     } 

    } 

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

     activity_main = (RelativeLayout)findViewById(R.id.activity_main); 
     sent = (FloatingActionButton)findViewById(R.id.sent); 
     sent.setOnClickListener(new View.OnClickListener(){ 


      @Override 
      public void onClick(View view) { 
       EditText input = (EditText)findViewById(R.id.input); 
       FirebaseDatabase.getInstance().getReference().push().setValue(new chatmessage(input.getText().toString(),FirebaseAuth.getInstance().getCurrentUser().getEmail())); 
       input.setText(""); 
       input.requestFocus(); 
       // displaychatmessage(); 
      } 
     }); 

     if(FirebaseAuth.getInstance().getCurrentUser() == null){ 
      startActivityForResult(AuthUI.getInstance().createSignInIntentBuilder().build(),SIGN_IN_REQUEST_CODE); 
     } 
     else{ 

      Snackbar.make(activity_main, "Welcome" +FirebaseAuth.getInstance().getCurrentUser().getEmail(),Snackbar.LENGTH_SHORT).show(); 
      displaychatmessage(); 
     } 
     //load content 
     displaychatmessage(); 
    } 

    private void displaychatmessage() { 

     ListView listOfMessage = (ListView)findViewById(R.id.lst_message); 
     adapter = new FirebaseListAdapter<chatmessage>(this,chatmessage.class,R.layout.list,FirebaseDatabase.getInstance().getReference()) { 


      @Override 
      protected void populateView(View v, chatmessage model, int position) { 
       //get reference to the list view items.xml 
       TextView messageText,messageUser,messageTime; 
       messageText = (TextView) v.findViewById(R.id.message_text); 
       messageUser = (TextView) v.findViewById(R.id.message_user); 
       messageTime = (TextView) v.findViewById(R.id.message_time); 

       messageText.setText(model.getMessaegeText()); 
       messageUser.setText(model.getMessageUser()); 
       messageTime.setText(DateFormat.format("dd-MM-yyyy (HH:mm:ss)",model.getMessageTime())); 

      } 
     }; 

     listOfMessage.setAdapter(adapter); 
    } 
} 

は私Chatmessage.java

package com.example.syedqadri.message; 

import java.util.Date; 

/** 
* Created by Syed Qadri on 09-Jun-17. 
*/ 
public class chatmessage { 

    private String messaegeText; 
    private String messageUser; 
    private long messageTime; 

    public chatmessage(String messaegeText, String messageUser) { 
     this.messaegeText = messaegeText; 
     this.messageUser = messageUser; 

     messageTime = new Date().getTime(); 
    } 
    public chatmessage() { 
    } 
    public String getMessaegeText() { 
     return messaegeText; 
    } 

    public void setMessaegeText(String messaegeText) { 
     this.messaegeText = messaegeText; 
    } 

    public String getMessageUser() { 
     return messageUser; 
    } 

    public void setMessageUser(String messageUser) { 
     this.messageUser = messageUser; 
    } 

    public long getMessageTime() { 
     return messageTime; 
    } 

    public void setMessageTime(long messageTime) { 
     this.messageTime = messageTime; 
    } 
} 

Answer 1

あるまあ..私はあなたを考えますインターネット権限をマニフェストファイルに追加するのを忘れました この行をurアプリケーションタグの上に置きます：

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