Android - Activity persist as destroyed after call startActivity

Question

This is the problem´s cenary:

The Activity "A" have a button than call startActivity B.

The Activity "B" have a button then call finish(). So the app show Activity "A" again.

Now, If i call activity "B" the property mDestroyed = true

The problem: When i access B a second time B is destroyed

Why B continue destroyed after i call startActivity?

Someone can help me?

ManifestFile:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="br.com.xxxxxx">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="xxx"
        android:supportsRtl="false"
        android:theme="@style/MyMaterialTheme">

        <activity
            android:name=".BaseActivity"
            android:screenOrientation="portrait" />

        <activity
            android:name=".A"
            android:screenOrientation="portrait" />
        <activity
            android:name=".B"
            android:screenOrientation="portrait" />

    </application>

</manifest>

Activity B method:

 @Override
                        public void onClick(DialogInterface dialog, int which) {
                            finish();
                        }

Activity A method:

   @Override
                    public void onClick(View view) {
                        startActivity(new Intent(MainActivity.this, B.class));
                    }

When i acess B a second time:

Answer 1

finish() method calls onDestroy() of activity . Replace finish() with

startActivity(new Intenet(CurrentActivity.this, NewActivity.class));

Your current activity will be in background.