Question

更新了答案 我有一个listview，它使用SimpleCursorAdapter从Sqlite数据库获取数据。为此，我创建了一个自定义的TodoCursorAdapter类。

我使用游标从数据库中获取3个字段值，并使用此适配器将这些值放入3个textviews中，我想从数据库中获取另一个字段callType，并根据此字段的值，我想在imageview中显示特定图像。

如果callType值为outgoing，我想显示图片;如果callType值为incoming，则显示另一张图片。我尝试在bindView中使用if else但是没有工作。你能指出我在这里缺少的东西吗？

TodoCursorAdapter.java：

public class TodoCursorAdapter extends SimpleCursorAdapter {
private Context mContext;
private Context appContext;
private int layout;
private Cursor cr;
private final LayoutInflater inflater;

public TodoCursorAdapter(Context context, int layout, Cursor c, String[] from, int[] to) {
    super(context, layout, c, from, to);
    this.layout=layout;
    this.mContext = context;
    this.inflater=LayoutInflater.from(context);
    this.cr=c;
}

@Override
public View newView(Context context, Cursor cursor, ViewGroup viewGroup) {
    return inflater.inflate(layout, viewGroup, false);
}

@Override
public void bindView(View view, Context context, Cursor cursor) {
    super.bindView(view, context, cursor);

    view=inflater.inflate(layout, null, false);
    TextView tvNumber = (TextView) view.findViewById(R.id.tvNumber);
    TextView tvDuration = (TextView) view.findViewById(R.id.tvDuration);
    TextView tvDateTime = (TextView) view.findViewById(R.id.tvDateTime);
    ImageView img2 = (ImageView) view.findViewById(R.id.img2);

    String number = cursor.getString(cursor.getColumnIndexOrThrow("displayname"));
    String duration = String.valueOf(cursor.getInt(cursor.getColumnIndexOrThrow("fileduration")));
    String dateTime = cursor.getString(cursor.getColumnIndexOrThrow("filedatetime"));
    String type = cursor.getString(cursor.getColumnIndexOrThrow("calltype"));

    tvNumber.setText(number);
    tvDuration.setText(duration);
    tvDateTime.setText(dateTime);

    if (type.equals("incoming")){
        img2.setImageResource(R.drawable.incomingcall);
    }else {
        img2.setImageResource(R.drawable.outgoing);
    }

}

MainActivity.java

    lv = (ListView) findViewById(R.id.lv);
    db = new DBSQL(getApplicationContext());
    populateListview();

public void populateListview(){
    db = new DBSQL(MainActivity.this);
    cursor = db.getAllData();
    String[] from = new String[]{"displayname", "fileduration", "filedatetime"};
    int[] to = new int[]{R.id.tvNumber, R.id.tvDuration, R.id.tvDateTime};
    if (adapter == null){
        adapter = new TodoCursorAdapter(MainActivity.this, R.layout.custom_listview, cursor, from, to);
        lv.setAdapter(adapter);

    }else {
        adapter.changeCursor(cursor);
    }


}

@Override
public void onResume() {
    populateListview();
    super.onResume();
}


}

Answer 1

最后我开始工作了。 Thanx到pskink。我重写了setViewImage方法，并根据值设置条件来检查值并设置图像。

Paragraph p = new Paragraph("This too shall pass");
p.Alignment = Element.ALIGN_CENTER;

根据SimpleCursorAdapter的bindView中的数据库字段中的值更改图像？

1 个答案: