从android手机上的android studio运行后，应用只会打开和关闭 [英] App just opens and closes after running from android studio on android phone

问题描述

从android studio上的android studio运行后，应用只会打开和关闭.

App just opens and closes after running from android studio on android studio.

还会显示以下警告:

应用gradle文件必须依赖com.google.firebase:firebase-core，Firebase服务才能正常运行.

The app gradle file must have a dependency on com.google.firebase:firebase-core for Firebase services to work as intended.

我尝试通过教程制作该应用程序，该应用程序已成功编译，但是在Android手机上运行时只能打开和关闭.

I tried making making the app from a tutorial, the app is compiled successfully but just opens and closes when it is run on android phone.

build.gradle

build.gradle

 apply plugin: 'com.android.application'

android {

compileSdkVersion 27
defaultConfig {
    applicationId "com.example.hp.chatapp"
    minSdkVersion 16
    targetSdkVersion 27
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
}

dependencies {

implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'com.android.support.constraint:constraint-layout:1.1.2'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

//add library
implementation 'com.android.support:design:27.1.1'
implementation 'com.firebaseui:firebase-ui-database:3.2.2'
implementation 'com.google.firebase:firebase-auth:10.2.1'
implementation 'com.firebaseui:firebase-ui-auth:3.2.2'

implementation "com.google.android.gms:play-services-gcm:10.2.1"

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

build.gradle

build.gradle

buildscript {

repositories {
    google()
    jcenter()
}
dependencies {
    classpath 'com.android.tools.build:gradle:3.1.3'
    classpath 'com.google.gms:google-services:4.0.2'


    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
}

}

主要活动是

public class MainActivity extends AppCompatActivity {

private static int SIGN_IN_REQUEST_CODE= 1;
private FirebaseListAdapter<ChatMessage> adapter;
RelativeLayout activity_main;
FloatingActionButton fab;

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    if(item.getItemId()==R.id.menu_sign_out){
        AuthUI.getInstance().signOut(this).addOnCompleteListener(new 
 OnCompleteListener<Void>() {
            @Override
            public void onComplete(@NonNull Task<Void> task) {
              Snackbar.make(activity_main,"You have been signed 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==RESULT_OK){
        Snackbar.make(activity_main,"Successfully signed in.Welcome !",Snackbar.LENGTH_SHORT).show();
        displayChatMessage();
    }
    else {
        Snackbar.make(activity_main,"We couldn't sign you in.Please 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);
    fab=(FloatingActionButton)findViewById(R.id.fab);
    fab.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("");
        }
    });

//check if not sign in then navigate signin page
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();
   }

//load content
    displayChatMessage();
}

private void displayChatMessage() {
    ListView listOfMessage=(ListView)findViewById(R.id.list_of_message);
    //Suppose you want to retrieve "chats" in your Firebase DB:
    Query query = 
 FirebaseDatabase.getInstance().getReference().child("chats");
//The error said the constructor expected FirebaseListOptions - here you create them:
    FirebaseListOptions<ChatMessage> options = new FirebaseListOptions.Builder<ChatMessage>()
            .setQuery(query, ChatMessage.class)
            .setLayout(android.R.layout.simple_list_item_1)
            .build();
    //Finally you pass them to the constructor here:
    adapter = new FirebaseListAdapter<ChatMessage>(options){
        @Override
        protected void populateView(View v, ChatMessage model, int position) {
            // Get references to the views of message.xml
            TextView messageText = (TextView)v.findViewById(R.id.message_text);
            TextView messageTime = (TextView)v.findViewById(R.id.message_time);
            TextView messageUser=(TextView)findViewById(R.id.message_user);
            messageText.setText(model.getMessageText());
            messageUser.setText(model.getMessageUser());
            messageTime.setText(DateFormat.format("dd-MM-yyyy (HH:mm:ss)",model.getMessageTime()));
        }
    };
listOfMessage.setAdapter(adapter);
}

}

已编辑

logcat的日志错误

log error from logcat

08-03 02:00:47.736 3199-3199/com.example.hp.chatapp E/HAL: PATH3 /odm/lib64/hw/gralloc.qcom.so
PATH2 /vendor/lib64/hw/gralloc.qcom.so
PATH1 /system/lib64/hw/gralloc.qcom.so
PATH3 /odm/lib64/hw/gralloc.msm8953.so
08-03 02:00:47.737 3199-3199/com.example.hp.chatapp E/HAL: PATH2 /vendor/lib64/hw/gralloc.msm8953.so
PATH1 /system/lib64/hw/gralloc.msm8953.so

推荐答案

尝试在Android Studio中使用Firebase工具.选择要集成的服务，然后按照分步说明进行操作.

Try using the Firebase tool within Android Studio. Select the service you want to integrate, and follow the step-by-step instructions.

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