[英]How to setImageResource List<Item>
I have a GridView. 我有一个GridView。 When I click GridView Item, Page go to FullScreenActivity with GridView Position.In this Activity, I use "id" from GridView Activity Intent. 当我单击GridView项时,Page转到带有GridView Position的FullScreenActivity。在此Activity中,我使用GridView Activity Intent中的“id”。 And then setImageResource with position. 然后用位置setImageResource。 I can't setImageResource in List Item Object. 我无法在List Item Object中设置setImageResource。 How can I solve this? 我怎么解决这个问题?
public class MyAdapter extends BaseAdapter {
List<Item> mItems = new ArrayList<Item>();
LayoutInflater mInflater;
public MyAdapter(Context context) {
mInflater = LayoutInflater.from(context);
mItems.add(new Item("Red", R.drawable.red));
mItems.add(new Item("Magenta", R.drawable.magenta));
mItems.add(new Item("Dark Gray", R.drawable.dark_gray));
mItems.add(new Item("Gray", R.drawable.gray));
mItems.add(new Item("Green", R.drawable.green));
mItems.add(new Item("Cyan", R.drawable.cyan));
}
.........
}
GridViewActivity.java GridViewActivity.java
GridView gridView = (GridView) findViewById(R.id.gridview);
gridView.setAdapter(new MyAdapter(this));
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent i = new Intent(getApplicationContext(), FullImageActivity.class);
i.putExtra("id", position);
startActivity(i);
}
});
FullScreenActivity.java FullScreenActivity.java
Intent i = getIntent();
int position = i.getExtras().getInt("id");
MyAdapter imageAdapter = new MyAdapter(this);
ImageView imageView = (ImageView) findViewById(R.id.full_image_view);
imageView.setImageResource(imageAdapter.mThumbIds[position]); // error
Because imageAdapter is new. 因为imageAdapter是新的。 it not include data. 它不包括数据。
you should send image resource. 你应该发送图像资源。
GridViewActivity.java GridViewActivity.java
GridView gridView = (GridView) findViewById(R.id.gridview);
gridView.setAdapter(new MyAdapter(this));
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Item item = parent.getAdapter().getItem(position);
Intent i = new Intent(getApplicationContext(), FullImageActivity.class);
i.putExtra("imageResource", item.getImageResource);
startActivity(i);
}
});
FullScreenActivity.java FullScreenActivity.java
Intent i = getIntent();
int imageResource= i.getExtras().getInt("imageResource");
ImageView imageView = (ImageView) findViewById(R.id.full_image_view);
imageView.setImageResource(imageResource);
hope to help you. 希望能帮到你。
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