Do two Activitys running in separate processes have shared memory space? Here in the Android documentation it says they have separate memory spaces.
But assume we have to Activitys: FirstActivity and SecondActivity. In the manifest, the android:process attribute is assigned to SecondActivity to make it run on a separate process. And assume FirstActivity has a public static field named A.
I start SecondActivity from FirstActivity using the startActivity() method, and I can access FirstActivity.A field and read its value which shows they shared the memory space. (but they're running in separate processes)
EDIT Here's the code:
AndroidManifest.xml
<application>
<activity android:name=".FirstActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".SecondActivity"
android:process="another_process">
</activity>
</application>
FirstActivity
public class FirstActivity extends Activity {
public static int A = 11111;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_first);
Intent intent = new Intent(this, SecondActivity.class);
startActivity(intent);
}
}
SecondActivity
public class SecondActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_gateway);
Log.i("SecondActivity", "A = " + FirstActivity.A); // here
}
}
What's happening? Is having separate memory spaces only for when two Activitys are in running from separate apps? Why the A variable is accessible from SecondActivity?