Question

I have the MainActvity class which contains a Tab (indicator as Tab)

Here is my code:-

public class MainActivity extends TabActivity {
TabHost tabHost;
Context context = MainActivity.this;
TabSpec spec;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    TabHost tabHost = getTabHost();

    tabHost.addTab(tabHost
            .newTabSpec("Tab")
            .setIndicator("Tab")
            .setContent(
                    new Intent(this, MyActivityGroup.class)
                            .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)));

    tabHost.setCurrentTab(0);

}

}

this internally calling MyActvityGroup which extends the ActvityGroup class as.

public class MyActivityGroup extends ActivityGroup {
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // you van get the local activitymanager to start the new activity

    View view = getLocalActivityManager().startActivity(
            "ReferenceName",
            new Intent(this, NewActivity.class)
                    .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))
            .getDecorView();
    this.setContentView(view);

}
}

in NewActvity,java file i have done something like

public class NewActivity extends Activity {

Button btnGo;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.new_activity);

    btnGo = (Button) findViewById(R.id.btnStartActivity);
    btnGo.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {

            Toast.makeText(NewActivity.this, "Clicked", Toast.LENGTH_SHORT)
                    .show();

            Intent intent = new Intent();
            intent.setClass(getParent(), ButtonActivity.class);
            startActivity(intent);

        }
    });

}
}

• now here this activity contains a button.
• I want to start the new activity in the same tab area on the click event of this button, but it start in the full screen mode. I am not able to see my tab any more.
• How can I start the activity in the current tab container.
• I there something wrong with my ActvityGroup class or I am not starting the activity in the proper manner..?

Answer 1

Use below code instead of your code, it will solve your problem.

MyActivityGroup.java

public class MyActivityGroup extends ActivityGroup {

    private Stack<String> stack;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (stack == null) {
            stack = new Stack<String>();
        }

        push("HomeStackActivity", new Intent(this, NewActivity.class));
    }

    @Override
    public void finishFromChild(Activity child) {
        pop();
    }

    @Override
    public void onBackPressed() {
        pop();
    }

    public void push(String id, Intent intent) {
        Window window = getLocalActivityManager().startActivity(id,
                intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
        if (window != null) {
            stack.push(id);
            setContentView(window.getDecorView());
        }
    }

    public void pop() {
        if (stack.size() == 1) {
            finish();
        }
        LocalActivityManager manager = getLocalActivityManager();
        manager.destroyActivity(stack.pop(), true);
        if (stack.size() > 0) {
            Intent lastIntent = manager.getActivity(stack.peek()).getIntent()
                    .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            Window newWindow = manager.startActivity(stack.peek(), lastIntent);
            setContentView(newWindow.getDecorView());
        }
    }
}

NewActivity.java

public class NewActivity extends Activity {

    Button btnGo;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.new_activity);

        btnGo = (Button) findViewById(R.id.btnStartActivity);
        btnGo.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                Toast.makeText(NewActivity.this, "Clicked", Toast.LENGTH_SHORT).show();

                Intent intent = new Intent();
                intent.setClass(getParent(), ButtonActivity.class);
                MyActivityGroup activityStack = (MyActivityGroup) getParent();
                activityStack.push("Button Activity", intent);                    
            }
        });
    }
}

And Please see below link for more information.

Multiple Android Activities in a TabActivity