我试图从我的数组列表中显示我imageView中的数据。但是,我越来越如何从数组列表中检索数据到ImageView?
了java.lang.RuntimeException:无法实例活动ComponentInfo {com.example.gorila.sqlite_grid_view/com.example.gorila.AvatarShop.imageView}:显示java.lang.NullPointerException
我试图做一个简单的功能,其中当用户从我的自定义列表中购买图像时,图像存储的索引将被添加到我的数组列表中,然后将其传递到我的imageView活动类,然后用户将能够按下用户可以切换到他们新购买的图像的按钮。
因此,它将从MainActivity - > DetailActivity - > imageView去。
主要活动:
int[] avatarImage = {R.mipmap.blademaster,R.mipmap.gunslinger,R.mipmap.pyro,R.mipmap.darthvader};
listView = (ListView) findViewById(R.id.avatarlv);
MyAdapter myAdapter = new MyAdapter(MainActivity.this,titles,harga,avatarImage);
listView.setAdapter(myAdapter);
listView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
Intent mIntent = new Intent(MainActivity.this,DetailActivity.class);
mIntent.putExtra("title",titles[position]);
mIntent.putExtra("avatarImages",avatarImage[position]);
mIntent.putExtra("harga",harga[position]);
startActivity(mIntent);
}
});
我的详细活动:
final ArrayList<Integer> list = new ArrayList<Integer>();
btnYes.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
if (mymoney > harga) { // when my money is > price of the item
list.add(mBundle.getInt("avatarImages"));
Toast.makeText(DetailActivity.this, "Successfully Bought the avatar", Toast.LENGTH_LONG).show();
Intent intent = new Intent(DetailActivity.this, imageView.class);
intent.putExtra("list1", list);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
}
else {
Toast.makeText(DetailActivity.this, "Your money is not enough", Toast.LENGTH_LONG).show();
Intent intent = new Intent(DetailActivity.this, MainActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
}
}
});
我的ImageView:
private int current_image_index;
ArrayList<Integer> imageBought = (ArrayList<Integer>)getIntent().getSerializableExtra("list1");
private void buttonClick()
{
imgView = (ImageView) findViewById(R.id.imageView);
buttonSw = (Button) findViewById(R.id.buttonSw);
buttonSw.setOnClickListener(
new View.OnClickListener(){
@Override
public void onClick(View v) {
current_image_index++;
current_image_index = current_image_index % imageBought.size();
imgView.setImageResource(imageBought.get(current_image_index));
}
}
);
}
请帮助。
抱歉,但这不是一项活动?我意图调用它,它的工作,我得到的唯一问题是无法调用存储的数组并将其显示到图像视图。 @MacLean Sochor –