我真的需要帮助,我在我的应用程序中使用的Listview在滚动时非常慢,我该如何解决?我减少了图像,使用了视图,但没有任何改变..
我是android的初学者:)
也得到这样的信息:I / Choreographer:跳过32帧!应用程序可能在其主线程上做了太多工作。
这是我的代码
public class asker extends Activity {
ListView list;
String[] askerbaslik;
int[] images =
{R.drawable.barbar_icon, R.drawable.okcu_icon,
R.drawable.dev_icon,
R.drawable.goblin_icon,
R.drawable.duvar_kirici_icon, R.drawable.balon_icon,
R.drawable.buyucu_icon, R.drawable.sifaci_icon,
R.drawable.ejderha_icon,
R.drawable.pekka_icon, R.drawable.yavruejder_icon, R.drawable.madenci_icon};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.listview);
Resources res = getResources();
askerbaslik = res.getStringArray(R.array.asker_adlari);
list = (ListView) findViewById(R.id.listview);
ilyasadapter adapter = new ilyasadapter(this, askerbaslik, images);
list.setAdapter(adapter);
}
class ilyasadapter extends ArrayAdapter<String> {
Context context;
int[] images;
String[] titlearray;
ilyasadapter(Context c, String[] titles, int imgs[]) {
super(c, R.layout.liste_tasarim, R.id.asker_baslik, titles);
this.context = c;
this.images = imgs;
this.titlearray = titles;
}
class MyViewHolder {
TextView mytitle;
ImageView myimage;
MyViewHolder(View v) {
mytitle = (TextView) v.findViewById(R.id.asker_baslik);
myimage = (ImageView) v.findViewById(R.id.asker_icon);
}
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
MyViewHolder holder = null;
if (row == null) {
LayoutInflater inflater = (LayoutInflater)
context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.liste_tasarim, parent, false);
holder = new MyViewHolder(row);
row.setTag(holder);
Log.d("test", "creating a new row");
} else {
holder = (MyViewHolder) row.getTag();
Log.d("test", "Recycling stuff");
}
holder.myimage.setImageResource(images[position]);
holder.mytitle.setText(titlearray[position]);
return row;
}
}
}
单行文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_marginTop="5dp"
android:id="@+id/asker_icon"
android:layout_width="100dp"
android:layout_height="100dp"
android:src="@drawable/barbar_icon"
android:background="@drawable/rounded_corner"
></ImageView>
<TextView
android:id="@+id/asker_baslik"
android:layout_marginTop="40dp"
android:layout_marginLeft="30dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Asker ismi"
android:textColor="#ffffff"
android:textSize="15dp"
android:fontFamily="sans-serif"
/>
</LinearLayout>
我的列表视图
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#455A64" >
<ListView
android:id="@+id/listview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:divider="#263238"
android:dividerHeight="2px"
/>
</RelativeLayout>
答案 0 :(得分:0)
请尝试从列表视图中删除图标,看看是否可以提高性能。您可能正在使用分辨率太高的图像。在使用高分辨率图像时,我也注意到performance anomalies。
如果有帮助,请告诉我。如果没有,我们可以尝试其他一些事情。