Hier haben Sie, was ich getan habe, um dies zu erreichen. MainActivity Klasse:
public class MainActivity extends AppCompatActivity {
GridView gridView;
GridAdapter adapter;
List<String> list;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
list = new ArrayList<>();
for (int i = 0; i < 5; i++) {
list.add("Test " + i);
}
gridView = (GridView) findViewById(R.id.gridView);
adapter = new GridAdapter(this, list);
gridView.setAdapter(adapter);
}
}
main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.stackoverflow.MainActivity">
<GridView
android:id="@+id/gridView"
android:layout_width="match_parent"
android:layout_height="match_parent">
</GridView>
</RelativeLayout>
nun einen Adapter für Gridview machen
public class GridAdapter extends BaseAdapter {
List<String> list;
Context context;
public GridAdapter(Context context, List<String> list) {
this.list = list;
this.context = context;
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
if (view == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.griditem, parent, false);
}
TextView textView = (TextView) view.findViewById(R.id.textView);
LinearLayout linearLayout = (LinearLayout) view.findViewById(R.id.linearLayout);
textView.setText(list.get(position));
if (list.size() - 1 == position) {
linearLayout.addView(addButton());
}
return view;
}
private Button addButton() {
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
Button button = new Button(context);
button.setLayoutParams(params);
button.setText("Testing");
return button;
}
}
Und gridItem.xml ist
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linearLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="Testing"
android:textAppearance="@style/TextAppearance.AppCompat.Headline"
android:textStyle="bold" />
</LinearLayout>
Es ist das wichtigste Idee t Hast du den letzten Gegenstand und füge endlich einen Knopf hinzu. Sie können diesen Code verfeinern und auch recyclerView verwenden. Wenn Sie nun ein Element zur Liste hinzufügen, rufen Sie notifyDataSetChanged() auf; Hoffe, es wird dir helfen.
prüfen dieses [Tutorial] (http://chintanrathod.com/recyclerview-android-studio-part-1/) –