Question

android GridView ImageView 想实现点击图片 跳转后显示相应图片

package com.example.demo_stone_album;
public class GridActivity extends Activity {
GridView mGridView;
ImageView big_imageview;
private String TAG = "GridActivity";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gridview);

Log.d(TAG, "stone one");
mGridView = (GridView)this.findViewById(R.id.gridview01);
big_imageview = (ImageView) findViewById(R.id.bigimageview);
mGridView.setBackgroundColor(Color.BLUE);

final Integer[] mId =
{
R.drawable.v1,
R.drawable.v2,
R.drawable.v3,
R.drawable.v4,
R.drawable.v5,
R.drawable.v6,
R.drawable.v7,
R.drawable.v8,
R.drawable.v9,
R.drawable.v10,
R.drawable.v11,
R.drawable.v12,
R.drawable.v13,
R.drawable.v14,
R.drawable.v15,
R.drawable.v16,
R.drawable.v17,
R.drawable.v18
};

mGridView.setAdapter(new BaseAdapter() {

@Override
public View getView(int position, View arg1, ViewGroup arg2) {
// TODO Auto-generated method stub
ImageView imageview = new ImageView(GridActivity.this);
imageview.setLayoutParams(new GridView.LayoutParams(130, 130));
imageview.setScaleType(ImageView.ScaleType.FIT_CENTER);
imageview.setImageResource(mId[position]);
return imageview;
}

@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;

}

@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return null;
}

@Override
public int getCount() {
// TODO Auto-generated method stub
return mId.length;
}

});

mGridView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position,
long arg3) {
// TODO Auto-generated method stub
Log.v(TAG, ">>>>>>>>>stone<<<<<<<<");
int id = 0;
id = mId[position];
Intent intent = new Intent();
Bundle bundle = new Bundle();
bundle.putInt("address", id);
intent.putExtras(bundle);
intent.setClass(GridActivity.this, ImageViewActivity.class);
startActivity(intent);
}

});

test();
}

private void test(){

}
}
public class ImageViewActivity extends Activity{
private static final String TAG = "ImageViewActivity";
ImageView mBigImageView;

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.imageview);
final Integer[] mId =
{
R.drawable.v1,
......
R.drawable.v18
};

Intent intent = this.getIntent();
Bundle bundle = intent.getExtras();
int mItemId = bundle.getInt("address");
mBigImageView = (ImageView) findViewById(R.id.bigimageview);
mBigImageView = new ImageView(this);
mBigImageView.setImageResource(mId[mItemId]);
mBigImageView.setScaleType(ImageView.ScaleType.FIT_CENTER);

}
}

Answer 1

mBigImageView.setImageResource(mId[mItemId]);这行错了！你传过来的是图片资源的id，怎么当成数组下标了！？
mBigImageView.setImageResource(mItemId);按道理应该这么写，但是你在两个activity里都存取了图片数组，就会生成不同的图片资源id，所以第一个activity里传过去的id有可能永远都没法在第二个activity里找到需要的图片
正确做法是：
用一个公共资源类存储这个图片数组，在这两个activity里直接引用就行，如：
public class Picture{
public static final int pic[] = {
R.drawable.v1,
R.drawable.v2,
R.drawable.v3,
R.drawable.v4,
R.drawable.v5
......

};

}
而且通常正确的做法时，点击gridview某一item时，直接把这个item的position传递过去就行，根据position在数组里找到图片，很省事

追问

是的，参数传错了，刚已经觉悟到了，非常感谢你的回答，图片放在一个公共资源类非常方便

Answer 2

id都知道了，不能显示么？

追问

不能显示 新Activity中显示空白