java - 如何在另一个 Activity 的 TextView 中调用方法的输出？

Question

我正在编写一个应用程序来对数字进行排序并显示排序过程输入排序后，将显示一个新按钮，用于在新 Activity 中显示选择排序步骤

[SelectionSort Activity 1

我希望 SelectionSort 类中函数 SelectionSortMethod 的输出显示在新 Activity activity_Ssteps

SelectionSort.java:

public class SelectionSort extends AppCompatActivity {

    EditText input;
    EditText output;
    Button Ssteps ;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_selection_sort);
        input=findViewById(R.id.input);
        output=findViewById(R.id.output);
         Ssteps = findViewById(R.id.steps);

        Ssteps.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v) {

                Intent s = new Intent(SelectionSort.this, com.example.sorted.Ssteps.class);

                startActivityForResult(s, 1);
            }
        });}

    public void sortButtonPressed(View view){
            String[] numberList = input.getText().toString().split(","); 

            Integer[] numbers = new Integer[numberList.length];
            for (int i = 0; i < numberList.length; i++) {

                numbers[i] = Integer.parseInt(numberList[i]);
            }

            SelectionSortmethod(numbers); 
            output.setText(Arrays.toString(numbers));

// if button "sort " is pressed , the button "view steps "will be displayed
            Ssteps.setVisibility(View.VISIBLE);
        }
    }

    public static void SelectionSortmethod (Integer[]  arr)
    {
        // some code for sorting and showing the steps
}

Ssteps.java:

public class Ssteps extends AppCompatActivity {
    TextView steps_text ;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ssteps);
        setTitle("selection sort steps ");
        steps_text =findViewById(R.id.Stepstextview);
    }
}

Answer 1

您可以像这样使用intent.extras:

   Intent s = new Intent(SelectionSort.this, com.example.sorted.Ssteps.class);
   s.putExtra("AnyID",YOURDATA);
   startActivity(s);

然后在您的 Ssteps.class 中您可以使用以下方式获取数据id 像这样:

String ss = getIntent.getExtra("AnyID"); //the id is the same as the other one above
steps_text.settext(ss);