单击选项菜单上显示的空白屏幕

Question

I have option menu on my activity. I am displaying another activity on click of options menu using below method:

@Override
public boolean onOptionsItemSelected(MenuItem item) {

    Intent intent = new Intent();

    switch (item.getItemId()) {

    case R.id.some_menu:
        intent.setComponent(new ComponentName(MyActivity.this,SomeActivity.class));
        startActivity(intent);
        return true;

    case R.id.someother_menu:
        intent.setComponent(new ComponentName(MyActivity.this, SomeOtherActivity.class));
        startActivity(intent);
        return true;

    default:
        return super.onOptionsItemSelected(item);
    }
}

First menu, some_menu , is working fine. It displays mentioned Activity. However, when I click second menu, someother_menu , it displays blank black screen. No idea what is happening.

XML for SomeOtherActivity:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<TextView
    android:id="@+id/follow"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textSize="25sp" 
    />

<ListView 
    android:id="@+id/follow_list"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"> 
</ListView>
</LinearLayout>

Answer 1

I'm not sure if this is the solution, but try:

@Override
public boolean onOptionsItemSelected(MenuItem item) {

    Intent intent = new Intent();

    switch (item.getItemId()) {

    case R.id.some_menu:
        intent.setComponent(new ComponentName(MyActivity.this,SomeActivity.class));
        startActivity(intent);
        return true;

    case R.id.someother_menu:
        intent.setComponent(new ComponentName(MyActivity.this, SomeOtherActivity.class));
        startActivity(intent);
        return true;
    }
    return super.onOptionsItemSelected(item);
}

Answer 2

Your layout is empty, so you will not see anything -> blank black screen.

Add the text attribute to your TextView to show some dummy text:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
     android:layout_width="match_parent" android:layout_height="match_parent"   
     android:orientation="vertical" >

<TextView
    android:id="@+id/follow"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textSize="25sp" 
    android:text="DUMMYTEXT"
    />

<ListView 
    android:id="@+id/follow_list"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
</ListView>
</LinearLayout>