Question

如何在使用微调器对象时使用if else语句？

我完成了按钮和微调器的编码，我使用了一个数组来存储微调器中的值。

我的问题：当我在两个微调器中选择一些值并点击“SHOW FARE”按钮时，不会生成票价？

public class HelloSpinner extends Activity implements OnClickListener {

    /** Called when the activity is first created. 
     * @return */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Spinner spinner = (Spinner) findViewById(R.id.spinner);
        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
                this, R.array.source_array, android.R.layout.simple_spinner_item);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(adapter);

        Spinner spinner1 = (Spinner) findViewById(R.id.spinner1);
        ArrayAdapter<CharSequence> adapter2 = ArrayAdapter.createFromResource(
                this, R.array.destination_array, android.R.layout.simple_spinner_item);
        adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner1.setAdapter(adapter);

        View v= findViewById(R.id.button);
        v.setOnClickListener(this);
        if(spinner.getSelectedItem().toString()=="Adarsh Nagar"
           && spinner1.getSelectedItem().toString()=="Rajiv Chowk")
           {
                TextView t= (TextView) findViewById(R.id.text);
                t.setText("Fare:Rs. 16");
           }           
    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        switch (v.getId()) {
        case R.id.button:

        Intent i = new Intent(this,Fare.class);
        startActivity(i);
        break;  
        }
        }
   }

如果有人能在代码中发现错误，我将非常感谢您的反馈！

Answer 1

为spinner和inside创建setOnItemSelectedListener，将所选值存储在字符串变量中..

然后在按钮中点击检查您是否条件..

spinner.setOnItemSelectedListener(new OnItemSelectedListener(){
            @Override
            public void onItemSelected(AdapterView<?> arg0, View arg1,
                    int arg2, long arg3) {
                // TODO Auto-generated method stub
                 selectedspinnervalue =s1.getSelectedItem().toString();
            }
            @Override
            public void onNothingSelected(AdapterView<?> arg0) {
                // TODO Auto-generated method stub
            }
        });

其中字符串变量selectedspinnervalue包含由微调器选择的值..

现在在Button Click中检查如下条件：

yourbuttonobject.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
             if(selectedvalueinspinner.equalsIgnoreCase("Adarsh Nagar")&& selectedvalueinspinner1.equalsIgnoreCase("Rajiv Chowk")){
                // Your desired Code..
            } 
        }
    });

Spinner对象引用问题？

1 个答案: