Question

我正在尝试构建一个应用，该应用从2个微调器中获取2个输入的氧化还原对，以显示有关由这些化学物质制成的电池的信息，例如用作阳极/阴极的物质，每种物质的还原电位半反应和细胞等。

我的问题是，我无法找到任何方式来获取两个微调器的输入以进行计算，只是让两个微调器执行相同的操作。

我当前的代码是这样：

public class MainActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener{

Spinner spinner1, spinner2;
ArrayAdapter adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    adapter = ArrayAdapter.createFromResource(this, R.array.pairs, android.R.layout.simple_spinner_item);

    spinner1 = (Spinner) findViewById(R.id.spinner1);
    spinner1.setAdapter(adapter);
    spinner1.setOnItemSelectedListener(MainActivity.this);

    spinner2 = (Spinner) findViewById(R.id.spinner2);
    spinner2.setAdapter(adapter);
    spinner2.setOnItemSelectedListener(MainActivity.this);
}



@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
    String choice1 = parent.getItemAtPosition(position).toString();
    double first = 0;
    double second = 0;
    double anode;
    double cathode;
    if (choice1 == getResources().getString(R.string.MnO4)){
        first = 0.60;
        Toast.makeText(parent.getContext(), choice1, Toast.LENGTH_SHORT).show();
    } else if (choice1 == getResources().getString(R.string.Cl)) {
        first = 1.36;
        Toast.makeText(parent.getContext(), choice1, Toast.LENGTH_SHORT).show();
    }
    if (first > second) {
        cathode = first;
        anode = second;
    } else {
        cathode = second;
        anode = first;
    }
    double cellValue = anode - cathode;


}

@Override
public void onNothingSelected(AdapterView<?> parent) {

    }
}

我是android studio的新手，因此非常感谢您的帮助。谢谢

Answer 1

我建议您使用匿名类来处理onItemSelected。这样，您可以独立处理每个Spinner的选择。

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    adapter = ArrayAdapter.createFromResource(this, R.array.pairs, android.R.layout.simple_spinner_item);

    spinner1 = (Spinner) findViewById(R.id.spinner1);
    spinner1.setAdapter(adapter);
    spinner1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                // Do what you need to do with spinner1 info
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        });



    spinner2 = (Spinner) findViewById(R.id.spinner2);
    spinner2.setAdapter(adapter);
        spinner2.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                // Do what you need to do with spinner2 info
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        });
}

现在，您可以删除Override方法： @Override

public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

，您可以删除工具：

implements AdapterView.OnItemSelectedListener

如何使用2个独立微调器的输入

1 个答案: