I am trying to run an app using Android Studio 3.4.1, but the application crashes when I try to debug or run it.
I've encountered the Unable to start activity ComponentInfo error once already, but on a project that used Kotlin (this project is using Java), and with a different exception. I've tried editing the manifest, modifying activities and changing all of the images in the mipmap folders to the drawable folders, but none of that worked.
Here is my AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.example.testapp">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme"
tools:ignore="AllowBackup,GoogleAppIndexingWarning">
<activity
android:name=".Main2Activity"
android:label="@string/title_activity_main2" />
<activity
android:name=".NotificationsActivity"
android:label="@string/title_notifications" />
<activity
android:name=".DashboardActivity"
android:label="@string/title_dashboard" />
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.testapp.DashboardActivity" />
<activity
android:name=".BaseActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
My BaseActivity.java:
package com.example.testapp;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
public class BaseActivity extends AppCompatActivity implements BottomNavigationView.OnNavigationItemSelectedListener {
protected BottomNavigationView navigationView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(getContentViewId()); //References this line in the logs
navigationView = findViewById(R.id.nav_view);
navigationView.setOnNavigationItemSelectedListener(this);
}
@Override
protected void onStart() {
super.onStart();
updateNavigationBarState();
}
// Remove inter-activity transition to avoid screen tossing on tapping bottom navigation items
@Override
public void onPause() {
super.onPause();
overridePendingTransition(0, 0);
}
@Override
public boolean onNavigationItemSelected(@NonNull final MenuItem item) {
navigationView.postDelayed(new Runnable() {
@Override
public void run() {
int itemId = item.getItemId();
if (itemId == R.id.navigation_home) {
BaseActivity.this.startActivity(new Intent(BaseActivity.this, BaseActivity.class));
} else if (itemId == R.id.navigation_dashboard) {
BaseActivity.this.startActivity(new Intent(BaseActivity.this, DashboardActivity.class));
} else if (itemId == R.id.navigation_notifications) {
BaseActivity.this.startActivity(new Intent(BaseActivity.this, NotificationsActivity.class));
}
BaseActivity.this.finish();
}
}, 300);
return true;
}
private void updateNavigationBarState(){
int actionId = getNavigationMenuItemId();
selectBottomNavigationBarItem(actionId);
}
void selectBottomNavigationBarItem(int itemId) {
Menu menu = navigationView.getMenu();
for (int i = 0, size = menu.size(); i < size; i++) {
MenuItem item = menu.getItem(i);
boolean shouldBeChecked = item.getItemId() == itemId;
if (shouldBeChecked) {
item.setChecked(true);
break;
}
}
}
int getContentViewId() {
return 0;
}
int getNavigationMenuItemId() {
return 0;
}
}
And my debugging log:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.testapp, PID: 10261
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.testapp/com.example.testapp.BaseActivity}: android.content.res.Resources$NotFoundException: Resource ID #0x0
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2827)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2902)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1603)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:169)
at android.app.ActivityThread.main(ActivityThread.java:6578)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Caused by: android.content.res.Resources$NotFoundException: Resource ID #0x0
at android.content.res.ResourcesImpl.getValue(ResourcesImpl.java:204)
at android.content.res.Resources.loadXmlResourceParser(Resources.java:2133)
at android.content.res.Resources.getLayout(Resources.java:1142)
at android.view.LayoutInflater.inflate(LayoutInflater.java:421)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at android.support.v7.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at com.example.testapp.BaseActivity.onCreate(BaseActivity.java:18)
at android.app.Activity.performCreate(Activity.java:7016)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2780)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2902)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1603)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:169)
at android.app.ActivityThread.main(ActivityThread.java:6578)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
The app was supposed to work, but after modifying the .javas, it started giving this error no matter what I did. I've seen some questions that had similar results, but none of them actually helped me.
