我在尝试将图片放入gridview时收到两个错误
ImageItem item = data.get(position);
得到我的错误:
Error:(42, 34) error: incompatible types
required: ImageItem
found: Object
和
TypedArray imgs = getResources().obtainTypedArray(R.array.image_ids);
得到我的错误:
Error:(29, 60) error: cannot find symbol variable array
完整代码:
MainActivity.java
import java.util.ArrayList;
import android.app.Activity;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.widget.GridView;
public class MainActivity extends Activity {
private GridView gridView;
private GridViewAdapter customGridAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
gridView = (GridView) findViewById(R.id.gridView);
customGridAdapter = new GridViewAdapter(this, R.layout.row_grid, getData());
gridView.setAdapter(customGridAdapter);
}
private ArrayList getData() {
final ArrayList imageItems = new ArrayList();
// retrieve String drawable array
TypedArray imgs = getResources().obtainTypedArray(R.array.image_ids);
for (int i = 0; i < imgs.length(); i++) {
Bitmap bitmap = BitmapFactory.decodeResource(this.getResources(),
imgs.getResourceId(i, -1));
imageItems.add(new ImageItem(bitmap, "Image#" + i));
}
return imageItems;
}
}
GridViewAdapter.Java
import java.util.ArrayList;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class GridViewAdapter extends ArrayAdapter {
private Context context;
private int layoutResourceId;
private ArrayList data = new ArrayList();
public GridViewAdapter(Context context, int layoutResourceId,
ArrayList data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
ViewHolder holder = null;
if (row == null) {
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new ViewHolder();
//holder.imageTitle = (TextView) row.findViewById(R.id.text);
holder.image = (ImageView) row.findViewById(R.id.image);
row.setTag(holder);
} else {
holder = (ViewHolder) row.getTag();
}
ImageItem item = data.get(position);
//holder.imageTitle.setText(item.getTitle());
holder.image.setImageBitmap(item.getImage());
return row;
}
static class ViewHolder {
//TextView imageTitle;
ImageView image;
}
}
ImageItem.java
import android.graphics.Bitmap;
public class ImageItem {
private Bitmap image;
private String title;
public ImageItem(Bitmap image, String title) {
super();
this.image = image;
this.title = title;
}
public Bitmap getImage() {
return image;
}
public void setImage(Bitmap image) {
this.image = image;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
}
答案 0 :(得分:1)
我知道这篇文章是从不久前开始的,但是为了防止其他人遇到同样的问题,我这就解决了这个问题。
我有同样的问题。我花了一些时间来解决这个问题,但有两个地方你需要更新你应该解决这个问题的代码。
在GridViewAdapter.Java中进行以下更改
之前...
private ArrayList data = new ArrayList();
在...
private ArrayList<ImageItem> data = new ArrayList();
之前...
public GridViewAdapter(Context context, int layoutResourceId,
ArrayList data) {
在...
public GridViewAdapter(Context context, int layoutResourceId,
ArrayList<ImageItem> data) {
我希望这有帮助!
答案 1 :(得分:0)
您可以创建字符串数组,以便:
<string-array name="image_ids">
<item>@drawable/ads</item>
<item>@drawable/dsa</item>
<item>@drawable/sda</item>
</string-array>