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我试图打印从数据库列表视图检索的数据打印数据。有一段时间我的应用程序打印数据库中的每个数据，列表视图上的一行。因此，如果数据库中有10个数据，则应用程序将打印10行，对应于数据库的每一行。这里是它如何被打印的视图。
它现在的样子的新形象：
但是，它不打印的数据，因为我想要的。我想在特定的文本视图中打印该行的一列，但它不显示任何内容。
因此，活动RatedCalss调用方法selectTopCalls()并使List接收此方法返回的列表。然后我将这个列表传递给listAdapter。
嗯，我有一个名为RatedCalls.java本次活动：
public class RatedCalls extends Activity {
private static final String LOG_TAG = "RatedCalls";
private CallDataHelper cdh;
private ListView listview;
private ArrayList<String> ratedCallsList;
private MyListAdapter listAdapter;
private View view;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Log.i(LOG_TAG, "calling from onCreate()");
cdh = new CallDataHelper(this);
startService(new Intent(this, RatedCallsService.class));
setBasicContent();
}
public void setBasicContent() {
listview = (ListView) findViewById(R.id.list_view);
ratedCallsList = this.cdh.selectTopCalls();
Log.i(LOG_TAG, "ratedCallsList size: " + ratedCallsList.size());
listAdapter = new MyListAdapter(this, this, R.id.list_view, ratedCallsList);
listview.setAdapter(listAdapter);
}
}
我有这个类，一类ListAdapter名为MyListAdapter.java：
public class MyListAdapter extends ArrayAdapter { //--CloneChangeRequired
private ArrayList mList;
private Context mContext;
private Activity mActivity;
private int selectedPos = -1; // init value for not-selected
private ArrayList<String> ratedCallsList;
private CallDataHelper cdh;
public void setSelectedPosition(int pos){
selectedPos = pos;
notifyDataSetChanged();
}
public int getSelectedPosition(){
return selectedPos;
}
public MyListAdapter(Context context, Activity activity, int textViewResourceId, ArrayList list) {
super(context, textViewResourceId, list);
this.mList = list;
this.mContext = context;
this.mActivity = activity;
}
public View getView(int position, View convertView, ViewGroup parent){
View view = convertView;
try{
if (view == null) {
LayoutInflater vi = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = vi.inflate(R.layout.list_item, null); // --CloneChangeRequired(list_item)
}
// setting STRIP BG
if(position == selectedPos){
view.findViewById(R.id.rlt_main).setBackgroundColor(Color.rgb(062, 076, 120));
}else if(position%2==0){
view.findViewById(R.id.rlt_main).setBackgroundColor(Color.rgb(226, 231, 239));
}else{
view.findViewById(R.id.rlt_main).setBackgroundColor(Color.rgb(200, 210, 223));
}
setViews(position, view);
}catch(Exception e){
//Log.i(MyListAdapter.class.toString(), e.getMessage());
}
return view;
}
public void setViews(int position, View view) {
cdh = new CallDataHelper(mContext);
if(mContext.getClass().equals((RatedCalls.class))){
ratedCallsList = this.cdh.selectTopCalls();
Log.i("MYLISTADAPTER", "size " + ratedCallsList.size());
if (ratedCallsList != null) {
((TextView) view.findViewById(R.id.contact_name)).setText(ratedCallsList.get(0));
((TextView) view.findViewById(R.id.phone_number)).setText(ratedCallsList.get(1));
((TextView) view.findViewById(R.id.duration)).setText(ratedCallsList.get(2));
((TextView) view.findViewById(R.id.date)).setText(ratedCallsList.get(3));
}
}else if(mContext.getClass().equals(RatedContacts.class)){
final PublishersBO listPublisher = (PublishersBO) mList.get(position);
if (listPublisher != null) {
//--setting list_item views
((TextView) view.findViewById(R.id.contact_name)).setText(listPublisher.getName());
((TextView) view.findViewById(R.id.phone_number)).setText(listPublisher.getEmail());
//--onClickListener
view.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
Intent myIntent = new Intent(mContext,RatedContacts.class);
myIntent.putExtra("NAME", listPublisher.getName());
myIntent.putExtra("ACTIVITY_NAME", mContext.getClass().toString());
mContext.startActivity(myIntent);
mActivity.finish();
}
});
}
}
}
}
该检索方法来自数据库的数据处于一个处理SQLite函数的分离类中。这是方法：
public ArrayList<String> selectTopCalls() {
ArrayList<String> list1 = new ArrayList<String>();
Cursor cursor = this.db.query(TABLE_NAME, null, null, null, null, null,
"duration desc");
if (cursor.moveToFirst()) {
do {
//if (cursor.getString(2) != "") {
cdObj = new CallData();
list1.add(cursor.getString(2));
list1.add(cursor.getString(4));
list1.add(cursor.getString(5));
list1.add(cursor.getString(6));
} while (cursor.moveToNext());
}
if (cursor != null && !cursor.isClosed()) {
cursor.close();
}
return list1;
}
这里是名为视图的XML文件list_item.xml：
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="67px"
android:id="@+id/rlt_main"
android:layout_toRightOf="@+id/iv_forward">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:id="@+id/iv_forward"
android:src="@drawable/icon"
android:layout_alignParentLeft="true">
</ImageView>
<TextView
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:id="@+id/phone_number"
android:layout_alignParentBottom="true"
android:layout_toRightOf="@+id/iv_forward"
android:layout_alignBottom="@+id/iv_forward">
</TextView>
<TextView
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:id="@+id/duration"
android:layout_alignBottom="@+id/phone_number"
android:layout_alignRight="@+id/phone_number"
>
</TextView>
<TextView
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:id="@+id/date"
android:layout_alignBottom="@+id/contact_name"
android:layout_alignRight="@+id/contact_name"
>
</TextView>
<TextView
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:id="@+id/contact_name"
android:textSize="20px"
android:layout_toRightOf="@+id/iv_forward"
android:layout_alignParentTop="true">
</TextView>
所以我想在活动的文本视图中打印数据，但我不知道在哪里设置文本，在什么类中，如果在MyListAdapter类中o如果在活动中。
感谢。
我做了一件类似的，但让我“MyAdapter延伸ResourceCursorAdapter“，然后使用”bindView“查找并设置每个列表项的文本元素。 （如果您愿意，我可以分享该方法） – 2011-01-23 16:09:58