Question

我有一些片段以编程方式添加不同的标签。每个按钮都有一个带有xml onClick的按钮，它被传递给一个视图。如何识别从该视图中单击的片段？代码如下。

NewFragment.java

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.new_fragment, container, false);

    TextView tv = (TextView) view.findViewById(R.id.name);
    Bundle bundle = this.getArguments();
    int index = bundle.getInt("index");
    tv.setText(Integer.toString(index));

    return view;
}

Activity.java

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity);

    FragmentManager fm = getSupportFragmentManager();
    FragmentTransaction ft = fm.beginTransaction();

    for (int loop = 0; loop < 4; loop++) {
        NewFragment fragment = new NewFragment();
        Bundle args = new Bundle();
        args.putInt("index", loop);
        fragment.setArguments(args);
    //tag set to value of loop here
        ft.add(R.id.new_fragment, fragment, Integer.toString(loop));
    }
    ft.commit();
}

public void toggleEdit(View view) {
  //How do I find clicked fragment?
  }

new_fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:id="@+id/test">
    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Name"
            android:layout_marginLeft="5dp"
            android:padding="5dp"
            />
        <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:id="@+id/name"
            android:text="Test"
        />
    </LinearLayout>
    <!-- Button in question is below -->
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="right"
        android:text="@string/edit"
        android:onClick="toggleEdit"
        android:id="@+id/edit_button"
    />

</LinearLayout>

Answer 1

让Fragment定义您的活动实现的接口。为该接口提供一个带有字符串参数的方法，并在onClick上传入当前Fragment的标记。

有关详细信息http://developer.android.com/training/basics/fragments/communicating.html

，请参阅有关片段通信的本指南

如何从它的按钮的xml onClick视图中识别片段？

1 个答案: