如何使用按钮逐步迭代二维数组？

Question

在 android 中按下按钮后，我必须逐步迭代 2D 循环，比如说

3 4 3 4 5 4 2 3 4

输出应该是：

After Button pressed:3 After Button pressed:4 After Button pressed:3 ....... ....... After Button pressed:4

我应该如何在循环中使用 clicklistener？

Answer 1

试试这样：

public class Main extends AppCompatActivity {
int[][] array = new int[][]{
        {1, 2, 3},
        {4, 5, 6},
        {7, 8, 9}
};

int rows = 0;
int columns = 0;
TextView textView;


@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    textView = (TextView) findViewById(R.id.text);


    findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            if (columns < array[rows].length) {
                textView.setText("After Button pressed: " + array[rows][columns]);
                columns++;
            } else {
                rows++;
                if (rows != array.length) {
                    columns = 0;
                    textView.setText("After Button pressed: " + array[rows][columns]);
                    columns++;
                } else {
                    rows = 0;
                    columns = 0;
                }
            }
        }
    });
}