如果在微调器中使用

Question

我想获取微调器中的值，然后用户按下确定按钮，然后从微调器的值开始新的活动。字符串数组就是这样。我使用两个微调器值 get 并针对微调器启动新活动

Spinner s, s1;
    Button ok;
    Object _globalString, _globalString2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_menu);

        s = (Spinner) findViewById(R.id.spinner);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_spinner_dropdown_item, array_spinner);
        s.setAdapter(adapter);

        s1 = (Spinner) findViewById(R.id.spinner01);
        ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_spinner_dropdown_item, array_spinner01);
        s1.setAdapter(adapter1);
//
//    s2=(Spinner)findViewById(R.id.spinner02);
//    ArrayAdapter<String> adapter2=new ArrayAdapter<String>(getApplicationContext(),android.R.layout.simple_spinner_dropdown_item,array_spinner02);
//    s2.setAdapter(adapter2);

        ok = (Button) findViewById(R.id.btn_ok);
        ok.setOnClickListener(this);

        s.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                                    int position, long id) {
                _globalString = parent.getItemAtPosition(position);
            }

            //@Override
            public void onNothingSelected(AdapterView<?> parent) {
                // TODO Auto-generated method stub

            }
        });

        s1.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                                    int position, long id) {
                _globalString2 = parent.getItemAtPosition(position);
            }

            // @Override
            public void onNothingSelected(AdapterView<?> parent) {
                // TODO Auto-generated method stub

            }
        });

    }

    @Override
    public void onClick(View v) {
        if (v.getId() == R.id.btn_ok) {
            if (_globalString.equals("Honda") || _globalString2.equals("Civic")) {
                startActivity(new Intent(getApplicationContext(), Civic.class));
            } else if (_globalString.equals("Toyota") || _globalString2.equals("Gli")) {
                startActivity(new Intent(getApplicationContext(), Toyota.class));
            }

        }
    }
}

这是可能产生错误的代码。抱歉申请已停止 所以我坚持这个代码。

Answer 1

使用 setOnItemSelectedListener 代替 setOnItemClickListener：

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    Spinner s, s1;
    Button ok;
    Object _globalString, _globalString2;
    String[] array_spinner = {"Honda", "Toyota"};
    String[] array_spinner01 = {"Civic", "Gli"};

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        s = (Spinner) findViewById(R.id.spinner);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_spinner_dropdown_item, array_spinner);
        s.setAdapter(adapter);

        s1 = (Spinner) findViewById(R.id.spinner01);
        ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_spinner_dropdown_item, array_spinner01);
        s1.setAdapter(adapter1);
//
//    s2=(Spinner)findViewById(R.id.spinner02);
//    ArrayAdapter<String> adapter2=new ArrayAdapter<String>(getApplicationContext(),android.R.layout.simple_spinner_dropdown_item,array_spinner02);
//    s2.setAdapter(adapter2);

        ok = (Button) findViewById(R.id.btn_ok);
        ok.setOnClickListener(this);

        s.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                _globalString = parent.getItemAtPosition(position);

            }

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

            }
        });

        s1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                _globalString2 = parent.getItemAtPosition(position);
            }

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

            }
        });

    }

    @Override
    public void onClick(View v) {
        if (v.getId() == R.id.btn_ok) {
            if (_globalString.equals("Honda") || _globalString2.equals("Civic")) {
                startActivity(new Intent(getApplicationContext(), Civic.class));
            } else if (_globalString.equals("Toyota") || _globalString2.equals("Gli")) {
                startActivity(new Intent(getApplicationContext(), Toyota.class));
            }

        }
    }
}