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數據我已經閱讀並試圖從這個論壇十幾個解決方案，但沒有人似乎工作 - 我不能在我的列表中顯示的數據 - view.findViewById（RESOURCEID）在bindView空每次返回 - 例如，當使用TextView t =（TextView）view.findViewById（R.id.leftCell）時。這是奇怪的行爲，考慮到我在Logcat中沒有錯誤，並且視圖本身不爲空。我究竟做錯了什麼？ 2個LinearLayouts每個纏繞一個ListView：定製SimpleCursorAdapter不顯示在屏幕上
如下我將我的佈局。我已經爲這兩個列表定義了一個自定義行結構，可以在database_item.xml和list_item.xml中找到。
這是我的代碼。
main.xml中：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<LinearLayout android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:id="@+id/topFrame">
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Devices loaded from Database: "></TextView>
<TableLayout android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:stretchColumns="1">
<TableRow>
<TextView android:text="Name"
android:padding="3dip"
android:gravity="center"/>
<TextView android:text="Remote Address"
android:padding="3dip"
android:gravity="center"/>
<TextView android:text="Type"
android:padding="3dip"
android:gravity="center"/>
</TableRow>
</TableLayout>
<ListView android:id="@+id/databaseList"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1">
</ListView>
</LinearLayout>
<LinearLayout android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1.2"
android:id="@+id/bottomFrame">
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Detected Xbee nodes via 'introduce' command:"></TextView>
<TableLayout android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:stretchColumns="1">
<TableRow>
<TextView android:text="Address"
android:padding="3dip"
android:gravity="center"/>
<TextView android:text="Type"
android:padding="3dip"
android:gravity="center"/>
</TableRow>
</TableLayout>
<ListView android:id="@+id/detectedNodesList"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1">
</ListView>
</LinearLayout>
database_item.xml：
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:stretchColumns="1">
<TableRow>
<CheckBox android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="visible"
android:id="@+id/checkBox"></CheckBox>
<TextView android:id="@+id/topLeftCell"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="3dip"
android:gravity="center"></TextView>
<TextView android:id="@+id/topCenterCell"
android:padding="3dip"
android:gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content"></TextView>
<TextView android:id="@+id/topRightCell"
android:gravity="center"
android:padding="3dip"
android:layout_width="wrap_content"
android:layout_height="wrap_content"></TextView>
</TableRow>
</TableLayout>
list_item.xml：
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:stretchColumns="1">
<TableRow>
<TextView android:id="@+id/leftCell"
android:padding="3dip"
android:layout_width="wrap_content"
android:layout_height="wrap_content"></TextView>
<TextView android:id="@+id/rightCell"
android:gravity="left"
android:padding="3dip"
android:text="TESTING"
android:layout_width="wrap_content"
android:layout_height="wrap_content"></TextView>
</TableRow>
從的onCreate相關代碼：
ListView topList = (ListView) findViewById(R.id.databaseList);
ListView bottomList = (ListView) findViewById(R.id.detectedNodesList);
String[] topColumns = new String[] {"name", "my", "type"};
String[] bottomColumns = new String[] {"my","type"};
int[] toTop = new int[] { R.id.topLeftCell, R.id.topCenterCell, R.id.topRightCell};
int[] toBottom = new int[] { R.id.leftCell, R.id.rightCell};
DbCursorAdapter e = new DbCursorAdapter(this, R.layout.database_item, cursor, topColumns, toTop);
DbCursorAdapter d = new DbCursorAdapter(this, R.layout.list_item, cursor, bottomColumns, toBottom);
topList.setAdapter(e);
bottomList.setAdapter(d);
和DbCursorAdapter.java：
public class DbCursorAdapter extends SimpleCursorAdapter {
private Context context;
private int layout;
private final String TAG = "DbCursorAdapter";
LayoutInflater inflater;
public DbCursorAdapter (Context context, int layout, Cursor c, String[] from, int[] to) {
super(context,layout,c,from,to);
this.context = context;
this.layout = layout;
inflater = LayoutInflater.from(context);
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
View v = inflater.inflate(layout, parent, false);
return v;
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
Cursor c = cursor;
if (layout == R.layout.list_item) {
int addressCol = c.getColumnIndex("my");
int typeCol = c.getColumnIndex("type");
int address = c.getInt(addressCol);
int type = c.getInt(typeCol);
TextView t = (TextView) view.findViewById(R.id.leftCell);
TextView t2 = (TextView) view.findViewById(R.id.rightCell);
if (t != null) {
t.setText(Integer.toString(address));
}
if (t2 != null) {
t2.setText(Integer.toString(type));
}
}
if (layout == R.layout.database_item) {
int nameCol = c.getColumnIndex("name");
int addressCol = c.getColumnIndex("my");
int typeCol = c.getColumnIndex("type");
String name = c.getString(nameCol);
int my = c.getInt(addressCol);
int type = c.getInt(typeCol);
CheckBox checkBox = (CheckBox) view.findViewById(R.id.checkBox);
checkBox.setVisibility(CheckBox.VISIBLE);
TextView t = (TextView) view.findViewById(R.id.topLeftCell);
TextView t2 = (TextView) view.findViewById(R.id.topCenterCell);
TextView t3 = (TextView) view.findViewById(R.id.topRightCell);
if (t != null) {
t.setText(name);
}
if (t2 != null) {
t2.setText(Integer.toString(my));
}
if (t3 != null) {
t3.setText(Integer.toString(type));
}
}
}
這可能會幫助： http://stackoverflow.com/questions/1832290/android-id-naming-convention-lower-case-with-underscore-vs-camel-case – lyschoening