android - 将编辑文本中的用户输入添加到 ListView 中

Question

我正在尝试从编辑文本中获取用户输入到 ListView 中，我已经看到了 this 的答案类似的问题，但我无法弄清楚

我试过了，没有收到来自 IDE 的错误，但是它不起作用

public class ListtestActivity extends Activity {
/** Called when the activity is first created. */

Button bt;
EditText et;
TextView tv;
ListView lv;
ArrayAdapter<String> adapter;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    bt = (Button) findViewById(R.id.button1);
    et = (EditText) findViewById(R.id.editText1);
    tv = (TextView) findViewById(R.id.textView1);
    lv = (ListView) findViewById(R.id.listView1);
    String input = et.getText().toString();
    String[] values = new String[] {"", input};

    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
            android.R.layout.simple_list_item_1, values);
    lv.setAdapter(adapter);

还尝试了以下内容

public class ListtestActivity extends Activity {
ArrayAdapter<String> m_adapter;
ArrayList<String> m_listItems = new ArrayList<String>();
/** Called when the activity is first created. */

Button bt;
EditText et;
TextView tv;
ListView lv;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    bt = (Button) findViewById(R.id.button1);
    et = (EditText) findViewById(R.id.editText1);
    tv = (TextView) findViewById(R.id.textView1);
    lv = (ListView) findViewById(R.id.listView1);
    m_adapter = new ArrayAdapter<String>(this, R.layout.main, m_listItems);
    lv.setAdapter(m_adapter);
    final String input = et.getText().toString();

    bt.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub

            m_listItems.add(new String(input));
            m_adapter.notifyDataSetChanged();
        }
    });

任何帮助将不胜感激

谢谢

*Android/Java/SO 非常新

Answer 1

在第二个代码 fragment 中，更改 m_adapter 的行

  m_adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, m_listItems);

然后在m_listItems中加入String

bt.setOnClickListener(new View.OnClickListener() {

    public void onClick(View v) {

        String input = et.getText().toString();
        if(null!=input&&input.length()>0){     

        m_listItems.add(input);

        m_adapter.notifyDataSetChanged();

      }
    }
});