为什么我只能在 Android 4 中得到 java.lang.Object[] cannot be cast to java.lang.String[][] 错误？

Question

I mean, I understand the error, but I don't see the error on Android Lollipop nor Marshmallow, only on KitKat.

I am sending a bidimensional array from an activity to another through an intent, like this:

String[][] bidimensionalArray = new String[3][3];

public void switchActivity(MenuItem item) {
    Intent intent = new Intent(this, myActivity.class);
    intent.putExtra("bidimensionalArray", bidimensionalArray);
    startActivity(intent);
}

And, on the receiving activity, I am doing this:

bidimensionalArray = (String[][]) getIntent().getSerializableExtra("bidimensionalArray");

Again, this works perfectly on Android 5 and 6, but is erroring out on Android 4.

What changed with regards to serialization from Lollipop onward?

Answer 1

So apparently this is a bug in Android 4 that has not been fixed yet. For the record, I was trying this on Android 4.3.1.

I solved this by getting the array as an Object[] array and copying it to a String[][] array like this in the receiving activity:

private Object[] arrayDataObject;
private String[][] arrayData;

arrayDataObject = (Object[]) getIntent().getSerializableExtra("myArray");
arrayData = Arrays.copyOf(arrayDataObject,arrayDataObject.length,String[][].class);