onBackPressed() method not triggered in AppCompatActivity

Question

AppCompatActivity onBackPressed() method fails to trigger in my activity.

I see the back arrow button and get the animation when pressing it, but nothing else happens. also overriding onKeyDown() has the same effect. it's not called.

I've spent many hours researching this with no luck. Nothing seems to work. Anyone has had a similar issue? Maybe this is a known bug?

My Activity.xml:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context="com.litenote.android.BackTestingActivity2Activity">
<include
    android:id="@+id/appBar"
    layout="@layout/app_bar" />
<TextView android:text="@string/hello_world" android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

app_bar.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/appBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/primary"
android:titleTextAppearance="@color/textWhite"
android:elevation="4dp"
android:theme="@style/ThemeOverlay.AppCompat.Dark"
android:popupTheme="@style/CustomPopupMenuTheme">

The activity Java file

package com.litenote.android;

import android.support.v7.app.ActionBar;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;

import com.superpad.android.R;

public class BackTestingActivity2Activity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_back_testing_activity2);
    Toolbar actionBar = ((Toolbar) findViewById(R.id.appBar));
    setSupportActionBar(actionBar);
    getSupportActionBar().setDisplayOptions(ActionBar.DISPLAY_HOME_AS_UP);
    getSupportActionBar().setDisplayShowHomeEnabled(true);

}

@Override
public void onBackPressed() {
    Log.d("BACK_BUTTON_DOESNT_WORK", "I will never execute and you will never see me :(");
    super.onBackPressed();
    this.finish();
}
}

Answer 1

onBackPressed() is not present in AppCompactActivity, You have to implement an InterFace KeyEvent.Callback and override onKeyUp method and check if the key is BackButton or you can extend ActionBarActivity which is child class of AppCompactActivity

Answer 2

I believe onBackPressed() is only called when the physical back button is pressed. If you're attempting to catch the toolbar back button press (the navigation icon), try using the following snippet:

@Override
public boolean onOptionsItemSelected(MenuItem menuItem) {
    switch (menuItem.getItemId()) {
        case android.R.id.home: {
            // Your code here
        }
    }
    return (super.onOptionsItemSelected(menuItem));
}

Answer 3

In your manifest file define the following inside your activity tag:

<meta-data
            android:name="android.support.PARENT_ACTIVITY"
            android:value="com.example.ParentActivity" />

After that in your activity:

@Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case android.R.id.home:
            NavUtils.navigateUpFromSameTask(this);
            return true;
        default:
            return super.onOptionsItemSelected(item);
        }
    }

Answer 4

back_button on the actionbar

this will wok

Toolbar toolbar=(Toolbar) findViewById(R.id.appBar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayOptions(ActionBar.DISPLAY_HOME_AS_UP);
getSupportActionBar().setDisplayShowHomeEnabled(true);

@Override
public void onBackPressed() {
super.onBackPressed();
this.finish();

}

or set which activity load when click back

<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.ParentActivity" />