[我正在使用Java语言在android中构建视频通话应用程序，其中依赖项出错。在Java代码，xml文件和所有依赖项下面都编写了。我不知道为什么会出错。我已经定义了全部。用谷歌搜索很多
MainActivity.java
package com.example.dekho;
import androidx.appcompat.app.AppCompatActivity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RelativeLayout;
import android.widget.Toast;
import com.google.firebase.FirebaseApp;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.PhoneAuthProvider;
import com.hbb20.CountryCodePicker;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeUnit;
public class MainActivity extends AppCompatActivity {
private CountryCodePicker ccp;
private EditText phoneText;
private EditText codeText;
private Button continueAndNextBtn;
private String checker="",phoneNumber="";
private RelativeLayout relativeLayout;
private PhoneAuthProvider.OnVerificationStateChangedCallbacks mCallbacks;
private FirebaseAuth mAuth;
private String mVerificationId;
private PhoneAuthProvider.ForceResendingToken mSendToken;
private ProgressDialog loadingBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ccp=findViewById(R.id.ccp);
phoneText=findViewById(R.id.phoneText);
codeText=findViewById(R.id.codeText);
continueAndNextBtn=findViewById(R.id.continueNextButton);
relativeLayout=findViewById(R.id.phoneAuth);
FirebaseApp.initializeApp(this);
continueAndNextBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
PhoneAuthProvider.getInstance().verifyPhoneNumber(
phoneNumber, // Phone number to verify
60, // Timeout duration
TimeUnit.SECONDS, // Unit of timeout
MainActivity.this, // Uses the <ActivityName>.this instead of just "this" Activity (for callback binding)
mCallbacks); // OnVerificationStateChangedCallbacks
}
});
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/register"
tools:context=".MainActivity">
<TextView
android:id="@+id/textview1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="260dp">
</TextView>
<RelativeLayout
android:id="@+id/phoneAuth"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/textview1"
android:layout_marginLeft="25dp"
android:layout_marginRight="25dp"
android:padding="8dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Phone Number:"
android:textStyle="bold"
android:textColor="@android:color/white"
android:textSize="18sp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical">
<com.hbb20.CountryCodePicker
android:id="@+id/ccp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@android:color/white"
app:ccp_defaultNameCode="IN" />
<EditText
android:id="@+id/phoneText"
android:layout_width="match_parent"
android:layout_height="60dp"
android:textColor="@android:color/white"
android:textColorHint="@android:color/darker_gray"
android:inputType="phone"
android:singleLine="true"
android:backgroundTint="@android:color/white"/>
</LinearLayout>
</LinearLayout>
</RelativeLayout>
<EditText
android:id="@+id/codeText"
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_margin="25dp"
android:hint="Write you code here..."
android:textColor="@android:color/white"
android:textColorHint="@android:color/white"
android:inputType="phone"
android:singleLine="true"
android:layout_below="@+id/phoneAuth"
android:drawableLeft="@drawable/password"
android:drawableTint="@android:color/white"
android:backgroundTint="@android:color/white"
android:visibility="gone"/>
<Button
android:id="@+id/continueNextButton"
android:layout_width="120dp"
android:layout_height="40dp"
android:layout_below="@+id/codeText"
android:layout_centerHorizontal="true"
android:text="Continue"
android:textAllCaps="false"
android:layout_marginTop="6dp"
android:textSize="15dp"
android:background="@color/colorPrimary"
android:textColor="@android:color/white"/>
</RelativeLayout>
项目级依赖项
// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.6.2'
classpath 'com.google.gms:google-services:4.2.0'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
google()
jcenter()
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}
应用程序级别依赖项
apply plugin: 'com.android.application'
android {
compileSdkVersion 29
buildToolsVersion "29.0.3"
defaultConfig {
applicationId "com.example.dekho"
minSdkVersion 16
targetSdkVersion 29
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.google.firebase:firebase-core:17.3.0'
implementation 'com.google.firebase:firebase-database:19.2.1'
implementation 'com.google.firebase:firebase-storage:19.1.1'
implementation "com.firebaseui:firebase-ui-database:0.4.0"
implementation "com.firebaseui:firebase-ui-auth:0.4.0"
implementation 'com.hbb20:ccp:2.1.9'
implementation 'pub.devrel:easypermissions:0.4.0'
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
implementation 'com.google.firebase:firebase-core:11.4.0'
implementation 'com.google.firebase:firebase-messaging:11.4.0'
implementation 'com.google.firebase:firebase-auth:11.4.0'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}
错误日志
--------- beginning of crash
2020-04-17 13:41:41.741 9995-9995/com.example.dekho E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.dekho, PID: 9995
java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process com.example.dekho. Make sure to call FirebaseApp.initializeApp(Context) first.
at com.google.firebase.FirebaseApp.getInstance(com.google.firebase:firebase-common@@19.3.0:184)
at com.google.firebase.auth.PhoneAuthProvider.getInstance(Unknown Source:2)
at com.example.dekho.MainActivity$1.onClick(MainActivity.java:51)
at android.view.View.performClick(View.java:6647)
at android.view.View.performClickInternal(View.java:6620)
at android.view.View.access$3100(View.java:791)
at android.view.View$PerformClick.run(View.java:26346)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:224)
at android.app.ActivityThread.main(ActivityThread.java:7081)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:536)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:928)
2020-04-17 13:41:41.782 9995-9995/com.example.dekho I/Process: Sending signal. PID: 9995 SIG: 9
在应用Gradle的末尾添加应用插件：“ com.google.gms.google-services”：