從動作框菜單項打開新活動，然后關閉實際活動

Question

我怎么只能打開一個活動？ 如果我在菜單中的同一項目上單擊更多次，則會打開更多次。 打開新活動時，是否可以關閉實際查看的活動？

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main_menu, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {

    int id = item.getItemId();

    //menu item clickd
    if (id == R.id.share) {
            startActivity(new Intent(MainActivity.this, HowToUse.class));
        return true;
    }

    if (id == R.id.terms) {
        Intent intent = new Intent(this,InfoAbout.class);
        this.startActivity(intent);
        return true;
    }

    if (id == R.id.howuse) {
        Intent intent = new Intent(this,HowToUse.class);
        this.startActivity(intent);
        return true;
    }

    return  super.onOptionsItemSelected(item);

}

Answer 1

好吧，我找到了靈魂樂團add.Flags清除頂部

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main_menu, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {

    int id = item.getItemId();

    //menu item clickd
    if (id == R.id.share) {
            startActivity(new Intent(MainActivity.this, HowToUse.class));
        return true;
    }

    if (id == R.id.terms) {
        Intent intent = new Intent(this,InfoAbout.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(intent);
    }

    if (id == R.id.howuse) {
        Intent intent = new Intent(this,HowToUse.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(intent);
    }

    return  super.onOptionsItemSelected(item);

}