[英]How to fix Android app crashing that uses Firebase?
我的問題很麻煩,我在 Android Studio 上做了一個應用程序,它有一個 TextView,它在啟動時顯示 Firebase 注冊令牌(我還是 Firebase 和 Android Studio 的新手,我正在試驗),我一直在構建我的應用程序的 APK 文件以在我的手機上測試它,因為當 Android Studio 由於某種原因連接到我的筆記本電腦時,它沒有檢測到我的手機,而且我無法使用仿真,因為我的筆記本電腦很舊(我認為它不支持虛擬化),所以每當我嘗試在我的手機上啟動我的應用程序時,我都會得到相當於 MyApp 的法語停止工作,我不知道如何查看崩潰日志文件。
tl;dr 我想知道是什么導致我的應用程序崩潰
主活動.java
package com.gci.gestioncapteursincendie;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.widget.TextView;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.iid.FirebaseInstanceId;
import com.google.firebase.iid.InstanceIdResult;
public class MainActivity extends AppCompatActivity {
private TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView= findViewById(R.id.textViewToken);
FirebaseInstanceId.getInstance().getInstanceId()
.addOnCompleteListener(new OnCompleteListener<InstanceIdResult>() {
@Override
public void onComplete(@NonNull Task<InstanceIdResult> task) {
if(task.isSuccessful()){
String token = task.getResult().getToken();
textView.setText("Token : " + token);
}
else
{
textView.setText("Token Not Generated");
}
}
});
}
}
編輯:通過下載正確的驅動程序,我設法通過 Android Studio 在我的手機上運行我的應用程序,我在運行它時檢查了 logcat,我得到了這個:
03-31 18:55:45.069 8855-8855/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.gci.gestioncapteursincendie, PID: 8855
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.gci.gestioncapteursincendie/com.gci.gestioncapteursincendie.MainActivity}: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process com.gci.gestioncapteursincendie. Make sure to call FirebaseApp.initializeApp(Context) first.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3319)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3415)
at android.app.ActivityThread.access$1100(ActivityThread.java:229)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1821)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:7406)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Caused by: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process com.gci.gestioncapteursincendie. Make sure to call FirebaseApp.initializeApp(Context) first.
at com.google.firebase.FirebaseApp.getInstance(com.google.firebase:firebase-common@@16.0.1:219)
at com.google.firebase.iid.FirebaseInstanceId.getInstance(Unknown Source)
at com.gci.gestioncapteursincendie.MainActivity.onCreate(MainActivity.java:38)
at android.app.Activity.performCreate(Activity.java:6904)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1136)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3266)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3415)
at android.app.ActivityThread.access$1100(ActivityThread.java:229)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1821)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:7406)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
編輯 2:我添加了用戶Riley Manda引用的以下代碼行:
FirebaseApp.initializeApp(this);
在onCreate()
方法中,我現在收到此錯誤:
日志跟蹤:
03-31 19:10:19.203 11562-11562/com.gci.gestioncapteursincendie E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.gci.gestioncapteursincendie, PID: 11562
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.gci.gestioncapteursincendie/com.gci.gestioncapteursincendie.MainActivity}: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process com.gci.gestioncapteursincendie. Make sure to call FirebaseApp.initializeApp(Context) first.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3319)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3415)
at android.app.ActivityThread.access$1100(ActivityThread.java:229)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1821)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:7406)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Caused by: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process com.gci.gestioncapteursincendie. Make sure to call FirebaseApp.initializeApp(Context) first.
at com.google.firebase.FirebaseApp.getInstance(com.google.firebase:firebase-common@@16.0.1:219)
at com.google.firebase.iid.FirebaseInstanceId.getInstance(Unknown Source)
at com.gci.gestioncapteursincendie.MainActivity.onCreate(MainActivity.java:41)
at android.app.Activity.performCreate(Activity.java:6904)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1136)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3266)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3415)
at android.app.ActivityThread.access$1100(ActivityThread.java:229)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1821)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:7406)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
編輯 3:我正在針對這個問題制作另一個線程,因為該線程似乎已經偏離了其最初的目的,感謝大家的回答。
將您的應用程序連接到 Crashlytics,這樣您將收到崩潰電子郵件,這將引導您解決導致您的應用程序崩潰的確切問題。
按照 firebase 上的說明在 Android Studio 中為您的應用設置 crashlytics。每次您的應用崩潰時,您都會收到來自 Crashlytics 的電子郵件:
這樣,每次您的應用因物理設備崩潰時,來自 Crashlytics 的通知電子郵件都會自動發送到您的電子郵件,指明導致您的應用崩潰的確切代碼/問題行。
根據您的 crashLog:
您必須在您的活動中初始化 firebase:將其添加到您的活動中:
FirebaseApp.initializeApp(this);
在您的 onCreate 中:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.yourlayout);
FirebaseApp.initializeApp(this);
添加這個FirebaseApp.initializeApp(this);
就在setContentView(R.layout.yourlayout);
或在您與 Firebase 建立任何連接之前
也適用於您的設備未在 android studio 中顯示
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