'com.example.radiobutton.MainActivity' 不是封闭类
import androidx.appcompat.app.AppCompatActivity;
public class gallery extends AppCompatActivity
{
private ImageSwitcher imageSwitcher;
Gallery gallery;
private int[] imgs ={
R.drawable.a,
R.drawable.b,
R.drawable.c,
R.drawable.d,
R.drawable.e,
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_gallery);
imageSwitcher = findViewById(R.id.imageSwithcer01);
imageSwitcher.setFactory(new viewFactory());
imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,android.R.anim.fade_in));
imageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,android.R.anim.fade_out));
imageSwitcher.setImageResource(R.drawable.a);
gallery = findViewById(R.id.Gallery01);
gallery.setOnItemSelectedListener(new onItemSelectedListener());
gallery.setSpacing(10);
gallery.setAdapter(new baseAdapter());
}
class viewFactory implements ViewSwitcher.ViewFactory {
@Override
public View makeView()
{
ImageView imageView = new ImageView(**MainActivity.this**);
imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
return imageView;
}
}
class onItemSelectedListener implements AdapterView.OnItemSelectedListener{
@Override
public void onItemSelected(AdapterView<?> parent,View view,int position,long id){
imageSwitcher.setImageResource((int) gallery.getItemIdAtPosition(position));
}
@Override
public void onNothingSelected(AdapterView<?> arg0){}
}
class baseAdapter extends BaseAdapter
{
public int getCount()
{
return imgs.length;
}
public Object getItem(int position)
{
return null;
}
public long getItemId(int position)
{
return imgs[position];
}
public View getView(int position, View converView, ViewGroup parent){
ImageView imageView = new ImageView(**MainActivity.this**);
imageView.setImageResource(imgs[position]);
imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
imageView.setLayoutParams(new Gallery.LayoutParams(60,60));
return imageView;
}
}
}
加粗代码处就是问题出现位置，我的java基础不是很牢，求救助
问题出在第33，62行
该回答引用GPTᴼᴾᴱᴺᴬᴵ
问题出在代码中使用了错误的类名来引用MainActivity.this。因为你的Activity名称是“gallery”，而不是“MainActivity”，所以在第33和62行中应该使用“gallery.this”来引用当前Activity的实例，而不是“MainActivity.this”。
因此，你应该将第33行和第62行中的代码从：
ImageView imageView = new ImageView(MainActivity.this);
修改为：
ImageView imageView = new ImageView(gallery.this);
这样就可以正确地引用当前Activity的实例，解决该问题。
ImageView imageView = new ImageView(MainActivity.this);
试一下更改为
ImageView imageView = new ImageView(getApplicationContext());