The following code shows how to ListView with custom Row.
Layout xml
<?xml version="1.0" encoding="utf-8"?> <!-- Copyright (c) 2012 Manning See the file license.txt for copying permission. --> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <EditText android:id="@+id/main_edittext" android:layout_width="0dp" android:layout_height="fill_parent" android:layout_weight="1" android:hint="Write a number" android:inputType="number" android:singleLine="true"/> <Button android:id="@+id/main_add" android:layout_width="wrap_content" android:layout_height="fill_parent" android:text="Add" android:onClick="addNumber"/> </LinearLayout> <ListView android:id="@+id/main_listview" android:layout_width="fill_parent" android:layout_height="fill_parent"/> </LinearLayout>
res/layout/number_row.xml
<?xml version="1.0" encoding="utf-8"?> <!-- Copyright (c) 2012 Manning See the file license.txt for copying permission. --> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content"> <TextView android:id="@+id/numbers_row_text" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:singleLine="true"/> <Button android:id="@+id/numbers_row_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Remove"/> </LinearLayout>
Java code
/******************************************************************************* * Copyright (c) 2012 Manning/* www. j a va 2 s. co m*/ * See the file license.txt for copying permission. ******************************************************************************/ import java.util.ArrayList; import java.util.List; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.TextView; import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.EditText; import android.widget.ListView; import android.widget.Toast; public class MainActivity extends Activity implements NumbersAdapterDelegate { private static final String TAG = MainActivity.class .getCanonicalName(); private ListView mListView; private ArrayList<Integer> mNumbers; private NumbersAdapter mAdapter; private EditText mEditText; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mEditText = (EditText) findViewById(R.id.main_edittext); mListView = (ListView) findViewById(R.id.main_listview); mNumbers = new ArrayList<Integer>(); mAdapter = new NumbersAdapter(this, mNumbers); mListView.setAdapter(mAdapter); } @Override protected void onResume() { super.onResume(); mAdapter.setDelegate(this); } @Override protected void onPause() { super.onPause(); mAdapter.setDelegate(null); } @Override public void removeItem(Integer value) { mNumbers.remove(value); Toast .makeText(this, "Removed object: " + value, Toast.LENGTH_SHORT) .show(); mAdapter.notifyDataSetChanged(); } public void addNumber(View v) { String value = mEditText.getText().toString().trim(); try { mNumbers.add(Integer.valueOf(value)); mEditText.setText(""); mAdapter.notifyDataSetChanged(); } catch (NumberFormatException e) { Log.e(TAG, "Couldn't convert to integer the string: " + value); } } } interface NumbersAdapterDelegate { void removeItem(Integer value); } class NumbersAdapter extends ArrayAdapter<Integer> { private LayoutInflater mInflator; private NumbersAdapterDelegate mDelegate; public NumbersAdapter(Context context, List<Integer> objects) { super(context, 0, objects); mInflator = LayoutInflater.from(context); } @Override public View getView(int position, View cv, ViewGroup parent) { if (null == cv) { cv = mInflator.inflate(R.layout.number_row, parent, false); } final Integer value = getItem(position); TextView tv = (TextView) cv.findViewById(R.id.numbers_row_text); tv.setText(value.toString()); View button = cv.findViewById(R.id.numbers_row_button); button.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if (null != mDelegate) { mDelegate.removeItem(value); } } }); return cv; } public void setDelegate(NumbersAdapterDelegate delegate) { mDelegate = delegate; } }