如何在android studio中点击全屏显示图像

Question

我试图在新活动中显示加载的图像，其名称为fullscreenActivity，但它不能。有谁能帮我找出这个解决办法吗?

<ImageView
android:id="@+id/imageView"
android:layout_width="match_parent"
android:layout_height="200dp"
android:src="@drawable/img"
android:padding="0dp"/>

public class MainActivity extends AppCompatActivity {
private ImageView imageView, fullimage;
private Context context;
private Uri uri;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imageView = findViewById(R.id.imageView);
fullimage = findViewById(R.id.fulscreenimage);
imageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(MainActivity.this, FullscreenimageActivity.class));
Picasso.with(context).load(uri).into(fullimage);
}
});
}
}

Answer 1

打开PutIntent的另一个活动。全屏活动设置一个imageview设置它匹配父元素并设置缩放类型