Question

我有一个空的ListView，它必须包含另外两个不同的ListViews，这取决于当我点击屏幕上的一个群集时GoogleMaps活动中群集中存在多少个标记，但是当我添加一个群集时我得到nullPointerException这个内部ListViews的主要部分。这两个日志显示正确的数据。这是代码：

java代码

public class myClusterInfoWindow implements GoogleMap.InfoWindowAdapter {

    private View clusterView;

public myClusterInfoWindow () {
    clusterView = getLayoutInflater().inflate(R.layout.cluster_info_window, null);
}

    @Override
    public View getInfoWindow(Marker marker) {
        LinearLayout ll = (LinearLayout) findViewById(R.id.clusterll);

        for (myClusterItem item : clickedCluster.getItems()) {
            View portalView = getLayoutInflater().inflate(R.layout.portal_info_window, ll, true);
            TextView title = (TextView) portalView.findViewById(R.id.name);
            TextView hacks = (TextView) portalView.findViewById(R.id.hacks);

            title.setText(item.getName());
            hacks.setText(item.getHacks());
            Log.d("CLUSTER", (String) title.getText());
            Log.d("CLUSTER", (String) hacks.getText());
            ll.addView(portalView);     // TODO nullPointerException
        }
        return clusterView;
    }

    @Override
    public View getInfoContents(Marker marker) {

        return null;
    }
}

cluster_info_window.xml

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

</LinearLayout>

portal_info_window.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content">

<LinearLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:background="@color/wallet_bright_foreground_holo_light"
    android:layout_marginBottom="5dp"
    android:id="@+id/linearLayout">

    <TextView
        android:id="@+id/name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="5dp" />

    <TextView
        android:id="@+id/hacks"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="5dp"/>

</LinearLayout>

<ToggleButton
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="New ToggleButton"
    android:id="@+id/toggleButton"
    android:layout_gravity="left|center_vertical"
    android:layout_toRightOf="@+id/linearLayout"
    android:background="@color/wallet_bright_foreground_holo_light"
    android:layout_toEndOf="@+id/linearLayout"
    android:layout_alignBottom="@+id/linearLayout"
    android:layout_alignParentTop="true" />

</RelativeLayout>

用另一个ListView动态地扩展ListView

0 个答案: