我一直在試圖從我的文件夾繪製顯示位圖,調整它們的大小(這部分工作得很好),並把它們放在一個列表視圖,但是當我運行出現在我的代碼沒有什麼...ListView的位圖
這裏它是:
public class MainActivity extends AppCompatActivity {
ImageView image;
Bitmap[] data;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
image = (ImageView) findViewById(R.id.image);
ListView list=(ListView)findViewById(R.id.list);
data=new Bitmap[4];
calculateInSampleSize size=new calculateInSampleSize();
data[0]=(size.decodeSampledBitmapFromResource(getResources(),R.drawable.ic_image1,100,100));
data[1]=(size.decodeSampledBitmapFromResource(getResources(),R.drawable.ic_image2,100,100));
data[2]=(size.decodeSampledBitmapFromResource(getResources(),R.drawable.ic_image3,100,100));
data[3]=(size.decodeSampledBitmapFromResource(getResources(),R.drawable.ic_image4,100,100));
Adapter adapter=new Adapter(this,R.layout.pager_item,data);
list.setAdapter(adapter);
我的適配器:
public class Adapter extends BaseAdapter{
Bitmap[] dataSource;
LayoutInflater minflater;
Activity parentActivity;
int itemLayout;
// constructor for adapter
public Adapter (Activity activity, int layout, Bitmap[] ds){
parentActivity = activity;
itemLayout = layout;
dataSource = ds;
}
@Override
public int getCount() {
return 0;
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView view;
if(convertView!=null){
view=(ImageView)convertView;
}
else{
view=(ImageView)minflater.inflate(itemLayout,parent,false);
view.setImageBitmap(dataSource[position]);
}
return view;
}
我當然有它一個ListView,另一個與ImageView的佈局(pager_item.XML)
謝謝您的幫助
有什麼異常? – Zoe