Question

我从用户那里得到输入，然后将它们放在ListView中，但是当我点击按钮时，它没有任何错误，打开布局并立即关闭它。当我尝试使用arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, m_list);时，它会很完美。

public class HomeChat extends AppCompatActivity {

    ListView listView;
    EditText writeSms;

    ArrayAdapter<String> arrayAdapter;
    ArrayList<String>  m_list = new ArrayList<String>();
    String emriUser;

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

        writeSms = (EditText) findViewById(R.id.shkrunSms);
        listView = (ListView) findViewById(R.id.listView);


        emriUser = getIntent().getExtras().getString("emri");

        arrayAdapter = new ArrayAdapter<String>(this,R.layout.list_chat,m_list);
        listView.setAdapter(arrayAdapter);

    }


    public void sentSmsButton(View view) {

      String  mesazhet = emriUser + ": " + writeSms.getText().toString();

        if (writeSms != null && writeSms.length() > 0) {

            m_list.add(mesazhet);
            arrayAdapter.notifyDataSetChanged();
            writeSms.setText("");

        }else
        {
            Toast.makeText(getApplicationContext(),"Something Wrong",Toast.LENGTH_LONG).show();
        }
    }
}

以下是聊天布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/test123"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="#000"
        android:background="#cccccc"
        android:paddingTop="5dp"
        android:paddingBottom="5dp"
        android:paddingLeft="5dp"
        android:paddingRight="5dp"
        />

</LinearLayout>

Answer 1

问题在于ArrayAdapter期望其中只有一个TextView的布局。因此，包含LinearLayout的{{1}}的布局无法使用。尝试将TextView更改为：

R.layout.list_chat

我的适配器有效吗？

1 个答案: