Question

我在Internet上找到了以下代码，我想知道如何删除onSubmit方法，该方法是单击按钮，并且代码仍然有效。当我简单地删除该方法时，代码就被破坏了。

public class CellSignalStrength extends Activity{
    TextView tv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tv=(TextView)findViewById(R.id.info);
    }
    public void onSubmit(View v) {
        TelephonyManager tm=(TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
        int phoneType=tm.getPhoneType();
        String ptype="";
        switch(phoneType) {
            case TelephonyManager.PHONE_TYPE_CDMA:
                ptype="\nPhone Type: CDMA\n";
                break;
            case TelephonyManager.PHONE_TYPE_GSM:
                ptype="\nPhone Type: GSM\n";
                break;
            case TelephonyManager.PHONE_TYPE_SIP:
                ptype="\nPhone Type: SIP\n";
                break;
            case TelephonyManager.PHONE_TYPE_NONE:
                ptype="\nPhone Type: NONE\n";
                break;
        }
        tv.setText(ptype);
    }
}

Answer 1

如果您想执行onClick不需要的操作，只需将代码移入

onCreate

像这样

public class CellSignalStrength extends Activity{
    TextView tv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tv=(TextView)findViewById(R.id.info);
           TelephonyManager tm=(TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
        int phoneType=tm.getPhoneType();
        String ptype="";
        switch(phoneType) {
            case TelephonyManager.PHONE_TYPE_CDMA:
                ptype="\nPhone Type: CDMA\n";
                break;
            case TelephonyManager.PHONE_TYPE_GSM:
                ptype="\nPhone Type: GSM\n";
                break;
            case TelephonyManager.PHONE_TYPE_SIP:
                ptype="\nPhone Type: SIP\n";
                break;
            case TelephonyManager.PHONE_TYPE_NONE:
                ptype="\nPhone Type: NONE\n";
                break;
        }
        tv.setText(ptype);
    }
}

删除onSubmit（）方法

1 个答案: