Android Back Button Doesn't Return to Previous Activity

android, android-activity, back, java, preferenceactivity

Solution

Inside your `SettingsActivity` you need to override `onOptionsItemSelected`to enable the back button on top left corner of Action Bar for going back. It does not know by itself that what it needs to do on click. Inside the case `android.R.id.home` you can just call `finish()`. This will finish your current activity and you will go back to `MainActivity` which started it. Eg:

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

Just for completeness, to enable the home button, you may add the following in your `onCreate()` of `SettingsActivity`:

getActionBar().setDisplayHomeAsUpEnabled(true);

As per docs of setDisplayHomeAsUpEnabled()

`It is to show the user that selecting home will return one level up rather than to the top level of the app.`

Hope this helps.

Problem

I have an app that has two activities: MainActivity and SettingsActivity. The MainActivity has a menu with a single Settings menu item. When this menu item is clicked, it launches the SettingsActivity with an intent. After the activity starts up, I click the back button in the top left corner and nothing happens. I assumed since I started the activity using an intent, the activity stack would be managed automatically. I want to return to the MainActivity. Am I wrong in this assumption? MainActivity.onMenuItemSelected ``` public boolean onMenuItemSelected(int featureId, MenuItem item) { int itemID = item.getItemId(); if(itemID == R.id.settings) { Intent intent = new Intent(this, SettingsActivity.class); startActivity(intent); } return true; } ``` SettingsActivity ``` public class SettingsActivity extends PreferenceActivity { public static final String TEST = "test"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); addPreferencesFromResource(R.xml.preferences); } } ```

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