Question

我有一个listview，但不知何故它无法检测点击监听器，虽然我已经检查了代码，我找不到问题所以...所以如果你能帮助我

这是我下载的xml布局：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/background"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/imageView2"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:contentDescription="@string/app_name"
        android:scaleType="fitXY"
        android:src="@drawable/topbar" />

    <ImageView
        android:id="@+id/downloaded_back_img"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@id/imageView2"
        android:layout_alignParentLeft="true"
        android:layout_marginBottom="14dp"
        android:layout_marginLeft="22dp"
        android:contentDescription="@string/app_name"
        android:src="@drawable/back" />

    <TextView
        android:id="@+id/downloaded_layout_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignTop="@id/downloaded_back_img"
        android:layout_centerHorizontal="true"
        android:paddingTop="5dp"
        android:text="@string/downloaded_my_title"
        android:textColor="@android:color/white"
        android:textSize="18sp"
        android:textStyle="bold" />

    <ListView
        android:id="@+id/downloaded_list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/imageView2"
        android:layout_centerHorizontal="true" >
    </ListView>

</RelativeLayout>

这是我填充的listitem xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/list_item_sel"
    android:orientation="horizontal"
    android:weightSum="100" >

    <ImageView
        android:id="@+id/downloaded_album_itempic"
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:layout_gravity="center_vertical"
        android:layout_margin="5dp"
        android:layout_weight="10"
        android:background="@android:color/white"
        android:contentDescription="@string/app_name"
        android:padding="1dip" />

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:layout_weight="70"
        android:gravity="center_vertical"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/downloaded_album_itemtitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="@android:color/white"
            android:textSize="15sp"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/downloaded_album_itemsinger"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="@android:color/white" />

        <TextView
            android:id="@+id/downloaded_album_itemgenre"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="@android:color/white" />
    </LinearLayout>

    <Button
        android:id="@+id/downloaded_album_item_delete"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:layout_weight="10"
        android:textColor="@color/red"
        android:background="@android:color/transparent"
        android:contentDescription="@string/app_name"
        android:drawableTop="@android:drawable/ic_delete"
        android:text="@string/delete" />

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:layout_weight="10"
        android:contentDescription="@string/app_name"
        android:background="@drawable/item_arrow"/>

</LinearLayout>

我的活动代码的一部分可能与列表视图有关：

public class Downloaded extends Activity {
    private DatabaseHelper helper;
    private DownloadedAlbumLazyAdapter adapter;
    private ArrayList<Albums> temp;
    private ListView list;
    private ImageView back;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.downloaded);
        init();
    }

    private void init() {
        list = (ListView) findViewById(R.id.downloaded_list);
        back = (ImageView) findViewById(R.id.downloaded_back_img);
        back.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                finish();
            }
        });
        temp = new ArrayList<Albums>();
        helper = new DatabaseHelper(this);
        helper.openDB();
        temp = helper.getAllDownloadedAlbums();

        adapter = new DownloadedAlbumLazyAdapter(this, temp);
        list.setAdapter(adapter);
        list.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> arg0, View v, int position,
                    long arg3) {
                Intent i = new Intent();
                i.putExtra("songs", temp.get(position).getSongs());
                i.setClass(Downloaded.this, DownloadedDetails.class);
                // startActivity(i);
                Toast.makeText(
                        Downloaded.this,
                        getString(R.string.downloaded_my_title) + " "
                                + temp.get(position).getSongs().size()
                                + " items", Toast.LENGTH_SHORT).show();
            }
        });

        helper.closeDB();
    }

我无法弄清楚造成这个问题的原因。此活动位于tabhost中，其他活动具有列表视图，但都可以正常工作。

Answer 1

首先，您应该从ListActivity而不是Activity延伸：

public class Downloaded extends ListActivity

然后在onCreate()方法中进行任何初始化。您可以使用getListView()来引用您的列表：

@Override
public void onCreate() {
    ...
    getListView().setOnItemClickListener(...);
    ...
}

如果您的ListView中有一个按钮，则应在适配器的focusable方法中将其getView()属性设置为false：

deleteButton.setFocusable(false);
deleteButton.setFocusableInTouchMode(false);

这样您的列表项就会收到该事件。

干杯！

Answer 2

使用此

public class Downloaded extends Activity implements OnItemClickListener {
}


@Override
public void onItemClick(View v){
}

... OR

list.setOnItemClickListener(new View.OnItemClickListener() {

Listview无法检测onitemclick事件

2 个答案: