Android ListView onItemClickListener being blocked by ProgressBar

问题

I had my onItemClickListener working for my ListView inside of my DrawerLayout working fine. But I added a ProgressBar that is displayed before anything else then it is set to View.GONE. However, I can't select and items from my list view any more.

list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:descendantFocusability="blocksDescendants" >

<TextView
    android:id="@+id/label"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#000000"
    android:focusable="false"
    android:paddingBottom="25dp"
    android:textColor="#ffffff"
    android:textSize="20sp" >
</TextView>

</RelativeLayout>

main_activity.xml:

<android.support.v4.widget.DrawerLayout       xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >

<FrameLayout
    android:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
</FrameLayout>

<ListView
    android:id="@+id/drawer"
    android:layout_width="240dp"
    android:layout_height="match_parent"
    android:layout_gravity="left"
    android:background="#000"
    android:choiceMode="singleChoice" />

<ProgressBar
    android:id="@+id/device_progress"
    style="?android:attr/progressBarStyleSmall"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true"
    android:indeterminateDrawable="@drawable/progress"
    android:visibility="gone" />

</android.support.v4.widget.DrawerLayout>

Java Code:

    @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Log.d(TAG, "Executing onCreate().");
    setContentView(R.layout.activity_devices);
    progress = (ProgressBar) findViewById(R.id.device_progress);
    progress.setVisibility(View.VISIBLE);
    manager = MainScreenActivity.getDeviceManager();
    manager = MainScreenActivity.getDeviceManager();
    drawerInfo = manager.getDrawerInfo();
    mDrawerList = (ListView) findViewById(R.id.drawer);
    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    adapter = new ArrayAdapter<String>(this,
            R.layout.drawer_list_item, R.id.label, drawerInfo);
    mDrawerList.setAdapter(adapter);
    mDrawerLayout
            .setDrawerListener(new DrawerLayout.SimpleDrawerListener() {
                @Override
                public void onDrawerClosed(View drawerView) {
                    super.onDrawerClosed(drawerView);
                    Log.d(TAG, "onDrawerClosed() executed!");
                }

                @Override
                public void onDrawerOpened(View view) {
                    super.onDrawerOpened(view);
                    Log.d(TAG, "onDrawerOpened() executed!");
                    refreshDrawer();
                }
            });
    mDrawerList.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                final int pos, long id) {
            Log.d(TAG, "CLICKED " + pos);
            selectDevice(pos);
        }
    });
}

回答1:

Found the solution, instead of adding a new element inside of the Root DrawerLayout, put it inside of the FrameLayout where your main content should go. This was a dumb mistake by me, but if anyone else is having the same problem. Here it is:

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >

<FrameLayout
    android:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <ProgressBar
        android:id="@+id/device_progress"
        style="?android:attr/progressBarStyleLarge"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:indeterminateDrawable="@drawable/progress"
        android:visibility="gone" />
</FrameLayout>

<ListView
    android:id="@+id/drawer"
    android:layout_width="240dp"
    android:layout_height="match_parent"
    android:layout_gravity="left"
    android:background="#000"
    android:choiceMode="singleChoice" />

</android.support.v4.widget.DrawerLayout>

回答2:

There are multiple View inside your DrawerLayout. The doc suggest you only have two!

To add a navigation drawer, declare your user interface with a DrawerLayout object as the root view of your layout. Inside the DrawerLayout, add one view that contains the main content for the screen (your primary layout when the drawer is hidden) and another view that contains the contents of the navigation drawer.

I would suggest to group the ListvView and the ProgressBar in one container

来源：https://stackoverflow.com/questions/18237218/android-listview-onitemclicklistener-being-blocked-by-progressbar