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I have the following MainActivity.java file currently running on Eclipse.

My intention is to get the user input and the spinner value and form a url like www.ex.com?title=(user_inpu)&title_type=(spinner_input).

As of now I am hung on this part. How do I get the text value from EditText and Spinner?

I have tried writing this code:

package com.example.myfirstapp;

import org.apache.commons.logging.Log;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;

public class MainActivity extends Activity {

Button btn;
EditText edit;

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

    btn = (Button) findViewById(R.id.button);
    edit = (EditText) findViewById(R.id.edit_message);

    btn.setOnClickListener(
            new View.OnClickListener()
            {
                public void onClick(View view)
                {
                    Log.v("EditText", edit.getText().toString());
                }
            });


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

spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
    public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
        Object item = parent.getItemAtPosition(pos);
    }
    public void onNothingSelected(AdapterView<?> parent) {
    }
});

}


}

I am getting a small error:

The method v(string, String) is undefined for MainActivity.java.

I have tried replacing the Log.v("EditText", edit.getText().toString()); to Log.v("EditText", MainActivity.this.edit.getText().toString());, but the error still persists.

How do I get rid of that? And in general, will this code work?

4

1 回答 1

3

您没有导入正确的Log类。

只需更换

import org.apache.commons.logging.Log;

经过

import android.util.Log;

而且您可能希望使您spinner成为活动的成员（就像按钮和文本字段一样），以便您可以从任何侦听器访问它。

我是说：

public class MainActivity extends Activity {

    private Button btn;
    private EditText edit;
    private Spinner spinner;

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

        btn = (Button) findViewById(R.id.button);
        edit = (EditText) findViewById(R.id.edit_message);
        spinner = (Spinner) findViewById(R.id.spinner);

        btn.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                Log.v("EditText", edit.getText().toString());
                Log.v("Spinner", spinner.getSelectedItem().toString());
            }
        });

        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource( this, R.array.title_type, android.R.layout.simple_spinner_item);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(adapter);
    }
}
于 2012-11-27T13:54:49.787 回答