Gridview带有添加按钮

时间:2017-03-24 05:25:16

标签: android xml gridview android-gridview

我将使用按钮创建gridview作为gridview的最后一项,我想将其用作添加按钮。

例如: 当您单击按钮(项目1)时,添加到gridview和(添加按钮)转到第二项

第1项按钮

Item1 Item2 Item3 Item4 按钮

像顶级风格的东西

2 个答案:

答案 0 :(得分:0)

一种可能性是,您可以根据自己的要求设计多个网格项布局。然后在Adapter类的“getView”方法中,您可以检查哪个xml作为视图膨胀。

希望这会帮助你挖掘它。

答案 1 :(得分:0)

在这里你得到了我为实现这一点所做的一切。 MainActivity类:

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中

<?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>

现在为gridView

创建一个适配器
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;
}

}

gridItem.xml是

<?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>

最主要的想法是获得最后一项并最后添加一个按钮。您可以优化此代码,也可以使用recyclerView。现在,当您向list添加项目时,请调用notifyDataSetChanged(); 希望它会对你有所帮助。

enter image description here