无法在Android Studio中为微调器设置onItemSelectedListener

Question

这是我的主要活动

put (Integer,capture<? extends com.cae_analysis.model.data.nx.NXPersistentDataInt>) in HashMap cannot be applied to (Integer,capture<? extends com.cae_analysis.model.data.nx.NXPersistentDataInt>)

这里我想为spinner设置onItemClickListener。我试过创建一个Inner类并创建一个匿名类，我甚至尝试过实现AdapterView.onItemSelectedListener并传递

public class MainActivity extends AppCompatActivity implements MaterialSearchBar.OnSearchActionListener {

    Spinner spinner;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        spinner = (Spinner) findViewById(R.id.sort_spinner);
        ArrayAdapter<CharSequence> spinnerAadapter = ArrayAdapter.createFromResource(this,
                R.array.sort_array, android.R.layout.simple_spinner_item);
        spinnerAadapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(spinnerAadapter);

    }

    @Override
    public void onSearchStateChanged(boolean enabled) {

    }

    @Override
    public void onSearchConfirmed(CharSequence text) {

    }

    @Override
    public void onButtonClicked(int buttonCode) {

    }
}

但是android studio的每一种方式都给了我编译时的错误。 什么是可能和正确的方法来setOnItemSelected旋转器和如何？

错误： enter image description here

代码：

spinner.setOnItemSelectedListener(this);

使用匿名类：

public class MainActivity extends AppCompatActivity implements MaterialSearchBar.OnSearchActionListener, AdapterView.OnItemSelectedListener{

    Spinner spinner;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        spinner = (Spinner) findViewById(R.id.sort_spinner);
        ArrayAdapter<CharSequence> spinnerAadapter = ArrayAdapter.createFromResource(this,
                R.array.sort_array, android.R.layout.simple_spinner_item);
        spinnerAadapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(spinnerAadapter);
        spinner.setOnItemClickListener(this);
    }

    @Override
    public void onSearchStateChanged(boolean enabled) {

    }

    @Override
    public void onSearchConfirmed(CharSequence text) {

    }

    @Override
    public void onButtonClicked(int buttonCode) {

    }

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

    }

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

    }
}

使用内部类：

public class MainActivity extends AppCompatActivity implements MaterialSearchBar.OnSearchActionListener {

    Spinner spinner;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        spinner = (Spinner) findViewById(R.id.sort_spinner);
        ArrayAdapter<CharSequence> spinnerAadapter = ArrayAdapter.createFromResource(this,
                R.array.sort_array, android.R.layout.simple_spinner_item);
        spinnerAadapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(spinnerAadapter);
        spinner.setOnItemClickListener(new AdapterView.OnItemSelectedListener(){

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

            }

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

            }
        });
    }

    @Override
    public void onSearchStateChanged(boolean enabled) {

    }

    @Override
    public void onSearchConfirmed(CharSequence text) {

    }

    @Override
    public void onButtonClicked(int buttonCode) {

    }
}

这种方式没有错误，但是它是正确的：

public class MainActivity extends AppCompatActivity implements MaterialSearchBar.OnSearchActionListener{

    Spinner spinner;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        spinner = (Spinner) findViewById(R.id.sort_spinner);
        ArrayAdapter<CharSequence> spinnerAadapter = ArrayAdapter.createFromResource(this,
                R.array.sort_array, android.R.layout.simple_spinner_item);
        spinnerAadapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(spinnerAadapter);
        spinner.setOnItemClickListener(new spinner_class());
     }

    @Override
    public void onSearchStateChanged(boolean enabled) {

    }

    @Override
    public void onSearchConfirmed(CharSequence text) {

    }

    @Override
    public void onButtonClicked(int buttonCode) {

    }

    public class spinner_class implements AdapterView.OnItemSelectedListener{

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

        }

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

        }
    }
}

Answer 1

在oncreate方法中添加setOnItemClickListener

public class MainActivity extends AppCompatActivity implements MaterialSearchBar.OnSearchActionListener {

    Spinner spinner;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        spinner = (Spinner) findViewById(R.id.sort_spinner);
        ArrayAdapter<CharSequence> spinnerAadapter = ArrayAdapter.createFromResource(this,
                R.array.sort_array, android.R.layout.simple_spinner_item);
        spinnerAadapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(spinnerAadapter);

       spinner.setOnItemClickListener(new AdapterView.OnItemSelectedListener(){

            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                 Log.d(TAG,"@@@setOnItemClickListener position:"+position);
            }

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

            }
        });

    }

    @Override
    public void onSearchStateChanged(boolean enabled) {

    }

    @Override
    public void onSearchConfirmed(CharSequence text) {

    }

    @Override
    public void onButtonClicked(int buttonCode) {

    }
}

Answer 2

我敢打赌（因为我们不知道代码中的错误消息和确切方法setOnItemSelectedListener调用位置），您必须实现OnItemSelectedListener，不 AdapterView.OnItemSelectedListener接口在MainActivity。描述here。