帶添加按鈕的Gridview

Question

我打算用按鈕創建gridview作爲gridview的最後一項，我想將它用作添加按鈕。

例如： 當你點擊按鈕（第1項）添加到GridView和（添加按鈕）進入第二項

---

項目1按鈕

項目1項目2 項目3項目4 按鈕

---

類似頂級款式

Answer 1

一種可能性是，您可以按照您的要求設計多個網格項目佈局。然後在Adapter類的「getView」方法中，您可以檢查哪個xml充當視圖。

希望這會幫助你挖掘它。

Answer 2

在這裏，你得到了我做到這一點。 MainActivity類別：

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> 

現在做的適配器的GridView

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; 
} 

} 

而且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> 

這是主要的想法你會得到最後一個項目，最後添加一個按鈕。您可以優化這段代碼，也可以使用recyclerView。現在，當你添加一個項目列表然後調用notifyDataSetChanged（）; 希望它能幫助你。