创建动态旋转器

Question

我有一个编辑文本，其中我输入了一个数字。我希望根据编辑文本中输入的编号来创建旋转器。例如，如果我在编辑文本中输入2个，则如果4 ==＆gt，则有2个旋转器；4个旋转器。

任何人都可以发布任何示例，请建议哪种技术更好地定义Java或XML中的旋转器数据？

Answer 1

使用以下代码...

public class MainActivity extends AppCompatActivity {
private EditText editText;
private Button mbtn;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    initView();
    //   toRun();
}
private void initView() {
    editText = findViewById(R.id.amEtNumber);
    mbtn = findViewById(R.id.amBtnSave);
    LinearLayout main_layer = (LinearLayout) findViewById(R.id.main);
    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
    LinearLayout layout = new LinearLayout(getApplicationContext());
    LinearLayout.LayoutParams params1 = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
    layout.setOrientation(LinearLayout.VERTICAL);
    layout.setLayoutParams(params);
    mbtn.setOnClickListener(view -> {
        int times = Integer.parseInt(editText.getText().toString().trim());
        for (int i = 0; i < times; i++) {
            List<String> spinnerArray = new ArrayList<>();
            spinnerArray.add("Select Item");
            spinnerArray.add("Item1");
            Spinner spinner = new Spinner(this);
            ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>
                    (this, android.R.layout.simple_spinner_item,
                            spinnerArray); //selected item will look like a spinner set from XML
            spinnerArrayAdapter.setDropDownViewResource(android.R.layout
                    .simple_spinner_dropdown_item);
            spinner.setAdapter(spinnerArrayAdapter);
            layout.addView(spinner);
        }
        main_layer.addView(layout);
    });
}

}

Answer 2

LinearLayout main_layer= (LinearLayout) findViewById(id.main_layer);
for (int i = 0; i < 2; i++) {
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,LinearLayout.LayoutParams.WRAP_CONTENT);
LinearLayout layout = new LinearLayout(getApplicationContext());
LinearLayout.LayoutParams params1 = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,LinearLayout.LayoutParams.WRAP_CONTENT);
layout.setOrientation(LinearLayout.VERTICAL);
layout.setLayoutParams(params);
// Creating Spinner
Spinner spinner = new Spinner(this);
    ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>
                (this, android.R.layout.simple_spinner_item,
               spinnerArray); //selected item will look like a spinner set from XML
    spinnerArrayAdapter.setDropDownViewResource(android.R.layout
                                                         .simple_spinner_dropdown_item);
    spinner.setAdapter(spinnerArrayAdapter);
layout.addView(button1);
main_layer.addView(layout);
}