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我的佈局中有一個畫廊,還有一個ImageView和一些TextView小部件。不幸的是,我在慢速手機上獲得低滾動性能。當我從包含ImageView和TextView的LinearLayout中移除背景圖像時,問題消失。 我對整個視圖進行了ondraw()操作,並檢查了剪輯矩形 - 它始終是整個屏幕。它看起來像我每次滾動畫廊(並且無效)整個屏幕無效。 當我只滾動圖庫小部件時,有什麼辦法可以避免全屏重繪嗎?畫廊滾動使整個視圖無效
感謝
private class GalleryAdapter extends ArrayAdapter<WeatherDisplayInfo> {
LayoutInflater mInflater;
Context mContext;
public GalleryAdapter(Context context) {
super(context, R.layout.gallery_item_view, mForecastData);
mContext = context;
mInflater = LayoutInflater.from(context);
}
public int getCount() {
return mForecastData.size();
}
public WeatherDisplayInfo getItem(int position) {
return mForecastData.get(position);
}
public long getItemId(int position) {
return position;
}
private class ViewHolder {
public TextView text_date;
public TextView text_forecast;
public TextView text_temperature;
public TextView text_pressure;
public TextView text_humidity;
public TextView text_windspeed;
public ImageView weather_image;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if(convertView == null) {
if(position == getCount() - 1) {
convertView = mInflater.inflate(R.layout.logo_view, null);
holder = new ViewHolder();
// store view holder
convertView.setTag(holder);
} else {
convertView = mInflater.inflate(R.layout.gallery_item_view, null);
holder = new ViewHolder();
holder.text_date = (TextView) convertView.findViewById(R.id.text_date);
holder.text_forecast = (TextView) convertView.findViewById(R.id.text_desc);
holder.text_temperature = (TextView) convertView.findViewById(R.id.text_temp);
holder.text_pressure = (TextView) convertView.findViewById(R.id.text_pressure);
holder.text_humidity = (TextView) convertView.findViewById(R.id.text_humidity);
holder.text_windspeed = (TextView) convertView.findViewById(R.id.text_wind);
holder.weather_image = (ImageView) convertView.findViewById(R.id.image_weather_view);;
// store view holder
convertView.setTag(holder);
convertView.setDrawingCacheEnabled(true);
convertView.buildDrawingCache();
}
} else {
holder = (ViewHolder) convertView.getTag();
}
// set view data
return convertView;
}
發佈您在代碼庫適配器中使用的代碼。您可能不會重新正確地使用具有類似問題的正確視圖 – pankajagarwal 2011-05-30 09:45:28
,但由於某些原因庫存在滾動視圖(或textview可滾動)時無法釋放內存,因此該表面會出現外存錯誤。 Gallery組件中存在一個已知的bug,它根本不允許適配器視圖重用(convertView始終爲空) – dparnas 2012-01-17 18:42:28