我有一个自定义游标适配器，除了bindView方法之外，它似乎大部分都在工作。我在bindView中有Log调用，它们永远不会出现在我的logCat中。我创建的listView正在显示正确的行数，但行是空白的。 onCLickListener也正常工作，logcat显示它已从数据库中读取行。
代码如下 - 在我的活动中：
// build a listView adapter
Log.i(LOGTAG,"About to create listView...");
tripList = (ListView) findViewById(android.R.id.list);
//tripList = getListView();
Log.i(LOGTAG,"ListView created...");
Log.i(LOGTAG,"About to create adapter...");
tripAdapter = new tripListAdapter(this, tripCur);
//setListAdapter(tripAdapter);
tripList.setAdapter(tripAdapter);
tripList.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
// Do something in response to the click
// Enable other buttons
togBtns(true);
// set global variable to show which ID was clicked on
listTripPosClicked = position;
// Get details from display, of clicked item
TextView tmpDate = (TextView) tripList.findViewById(R.id.dateFld);
TextView tmpDist = (TextView) tripList.findViewById(R.id.distFld);
TextView tmpMPG = (TextView) tripList.findViewById(R.id.mpgFld);
// store these for sending to doTripActivity
clickedDist = tmpDist.getText().toString();
clickedDate = tmpDate.getText().toString();
clickedMPG = tmpMPG.getText().toString();
Log.i(LOGTAG, "Dist = " + clickedDist);
Log.i(LOGTAG, "Date = " + clickedDate);
Log.i(LOGTAG, "mpg = " + clickedMPG);
}
});
适配器代码是：
// custom list adaptor class
private class tripListAdapter extends CursorAdapter {
//private final Cursor dataC;
private final LayoutInflater vi;
public View theView;
public tripListAdapter(Context con, Cursor c) {
// super constructor thingy
super(con, c);
//dataC = c;
vi = LayoutInflater.from(con);
}
@Override
public View getView (int position, View v, ViewGroup parent){
Log.i(LOGTAG,"In getView...");
// Create a message handling object as an anonymous class.
//mTripClickHandler = new OnItemClickListener() {
v = vi.inflate(R.layout.trip_row, parent, false);
Log.i(LOGTAG,"Leaving getView...");
return v;
}
@Override
public void bindView(View v, Context arg1, Cursor dataC) {
Log.i(LOGTAG,"In bindView...");
// get data from cursor
TextView dateTV = (TextView) v.findViewById(R.id.dateFld);
TextView distTV = (TextView) v.findViewById(R.id.distFld);
TextView mpgTV = (TextView) v.findViewById(R.id.mpgFld);
String tmpMPG = dataC.getString(dataC.getColumnIndexOrThrow(dbHistory.TRIP_MPG));
Double tmpNum = Double.valueOf(tmpMPG);
tmpMPG = String.format("%.2f", tmpNum);
dateTV.setText(dataC.getString(dataC.getColumnIndexOrThrow(dbHistory.TRIP_DATE)));
distTV.setText(dataC.getString(dataC.getColumnIndexOrThrow(dbHistory.TRIP_MILES)));
mpgTV.setText(tmpMPG);
Log.i(LOGTAG,"Leaving bindView...");
}
@Override
public View newView(Context arg0, Cursor arg1, ViewGroup arg2) {
// TODO Auto-generated method stub
Log.i(LOGTAG,"In newView...");
//theView = vi.inflate(R.layout.trip_row, arg2, false);
Log.i(LOGTAG,"Leaving newView...");
return theView;
}
}
logCat的输出显示了各种日志消息，但没有来自bindView，我想这就是我的listView为空的原因。
06-17 06:40:31.827: I/WIBBLE(866): About to create listView...
06-17 06:40:31.827: I/WIBBLE(866): ListView created...
06-17 06:40:31.838: I/WIBBLE(866): About to create adapter...
06-17 06:40:31.838: I/WIBBLE(866): OnResume with this many rows returned by cursor: 3
06-17 06:40:31.838: I/WIBBLE(866): In the loop, so cursor is not null....
06-17 06:40:31.897: I/WIBBLE(866): In getView...
06-17 06:40:31.917: I/WIBBLE(866): Leaving getView...
06-17 06:40:31.917: I/WIBBLE(866): In getView...
06-17 06:40:31.937: I/WIBBLE(866): Leaving getView...
06-17 06:40:31.957: I/WIBBLE(866): In getView...
06-17 06:40:31.967: I/WIBBLE(866): Leaving getView...
06-17 06:40:32.137: I/WIBBLE(866): In getView...
06-17 06:40:32.217: I/WIBBLE(866): Leaving getView...
06-17 06:40:32.279: I/WIBBLE(866): In getView...
06-17 06:40:32.347: I/WIBBLE(866): Leaving getView...
06-17 06:40:32.417: I/WIBBLE(866): In getView...
06-17 06:40:32.427: I/WIBBLE(866): Leaving getView...
06-17 06:40:32.959: I/Choreographer(866): Skipped 116 frames! The application may be doing too much work on its main thread.
06-17 06:40:34.056: I/WIBBLE(866): In getView...
06-17 06:40:34.147: I/WIBBLE(866): Leaving getView...
06-17 06:40:34.197: I/WIBBLE(866): In getView...
06-17 06:40:34.267: I/WIBBLE(866): Leaving getView...
06-17 06:40:34.289: I/WIBBLE(866): In getView...
06-17 06:40:34.308: I/WIBBLE(866): Leaving getView...
06-17 06:40:39.486: I/WIBBLE(866): Dist =
06-17 06:40:39.486: I/WIBBLE(866): Date =
06-17 06:40:39.496: I/WIBBLE(866): mpg =
任何想法为什么？
答案 0 :(得分：0)
这是一个适合我的样本：
private class CurAdapter extends CursorAdapter{
boolean imageExists;
public CurAdapter(Context context, Cursor c, int flags) {
super(context, c, flags);
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
TextView tv = (TextView) view.findViewById(R.id.textView1);
TextView tv1 = (TextView) view.findViewById(R.id.textView2);
ImageView iv = (ImageView) view.findViewById(R.id.imageView1);
// String isAdhoc = (cursor.getString(cursor.getColumnIndexOrThrow("isAdhoc")));
String name = (cursor.getString(cursor.getColumnIndexOrThrow("Name")));
String image = cursor.getString(cursor.getColumnIndexOrThrow("imageUri"));
String manuplate = dateConvert(cursor.getString(cursor.getColumnIndexOrThrow("BirthDate")));
// if(isAdhoc.equals("1")){
tv.setText(name);
if(manuplate.contains("0001")){
manuplate = manuplate.replace("0001", "");
}
tv1.setText((manuplate));
tv.setTypeface(tf, Typeface.BOLD);
tv1.setTypeface(tf1);
// System.out.println("Image Uri is:"+image);
if(image.contains("jpg") || image.contains("png")){
File f = new File(image);
Bitmap bmp = BitmapFactory.decodeFile(f.getAbsolutePath());
iv.setImageBitmap(bmp);
}else{
Uri IMAGE_URI = null;
IMAGE_URI = Uri.parse(image);
IMAGE_URI= Uri.withAppendedPath(IMAGE_URI, Contacts.Photo.CONTENT_DIRECTORY);
try{
iv.setImageURI(IMAGE_URI);
iv.setScaleType(ScaleType.CENTER_CROP);
}catch (Exception e){
imageExists = false;
}
}
if (!imageExists){
iv.setBackgroundResource(R.drawable.default_img);
iv.setScaleType(ScaleType.CENTER_CROP);
// }
}
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
View view = LayoutInflater.from(context).inflate(R.layout.contacts_list, null);
/* view.setTag(R.id.textView1, tv);
view.setTag(R.id.textView2, tv1);
view.setTag(R.id.imageView1, iv); */
return view;
}
}
答案 1 :(得分：0)
对于基于Cursor的适配器，实施getView()方法以调用newView()和bindView()方法。如果你像你一样覆盖它，而不调用super()那些方法就不会被调用。因此，请删除已覆盖的getView()方法，并在newView()方法中对行布局进行充气。
此外，对于基于Cursor的适配器，您通常不会覆盖getView()方法，而是使用需要覆盖的两个委托方法。