Question

Dialog dialog;

private void opendialog() {
    dialog = new Dialog(MainActivity.this);
    dialog.setContentView(R.layout.popup);
    dialog.setTitle(R.string.msettings);
    RelativeLayout reply_layout = (RelativeLayout) dialog
            .findViewById(R.id.reply_layout);
    final RelativeLayout ringtone_layout = (RelativeLayout) dialog
            .findViewById(R.id.ringtone_layout);
    registerForContextMenu(ringtone_layout);

    ringtone_layout.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            openContextMenu(ringtone_layout);
        }
    });
}

@Override
public void onCreateContextMenu(ContextMenu menu, View v,
        ContextMenuInfo menuInfo) {
    super.onCreateContextMenu(menu, v, menuInfo);
    menu.setHeaderTitle("Select The Action");
    menu.add(0, v.getId(), 0, "Edit");
    menu.add(0, v.getId(), 1, "Delete");
}

@Override
public boolean onContextItemSelected(MenuItem item) {
    System.out.println("Inside onContextItemSelected");
    return super.onContextItemSelected(item);
}

在对话框中使用上下文菜单时，永远不会调用

onContextItemSelected。我的代码有什么问题吗？提前谢谢..

Answer 1

注意：由于这个答案似乎得到了一些关注（upvotes），我正在编辑代码片段以反映更简洁的问题答案。

您正尝试在对话框中注册视图项的上下文菜单，但是要从活动中注册。这种方法是错误的。您实际上需要子类化Dialog，然后在那里创建和扩展您的视图，然后覆盖onCreateContextMenu（）以执行您的工作并注册上下文菜单的视图。然后，您应该在此处创建该对话框的实例。所以它会是这样的：

public class Mydialog extends Dialog {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.popup);
        dialog.setTitle(R.string.msettings);
        RelativeLayout reply_layout = (RelativeLayout) findViewById(R.id.reply_layout);
        final RelativeLayout ringtone_layout = (RelativeLayout) findViewById(R.id.ringtone_layout);
        registerForContextMenu(ringtone_layout);
        ringtone_layout.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                openContextMenu(ringtone_layout);
            }
        });
    }

    @Override
    public void onCreateContextMenu(ContextMenu menu, View v,
        ContextMenuInfo menuInfo) {
        super.onCreateContextMenu(menu, v, menuInfo);
        menu.setHeaderTitle("Select The Action");
        menu.add(0, v.getId(), 0, "Edit");
        menu.add(0, v.getId(), 1, "Delete");
    }

    // You should do the processing for the selected context item here. The
    // selected context item gets passed in the MenuItem parameter in 
    // the following method. In my answer I am force calling the onContextItemSelected()
    // method but you are free to do the actual processing here itself
    @Override 
    public boolean onMenuItemSelected(int aFeatureId, MenuItem aMenuItem) {
        if (aFeatureId==Window.FEATURE_CONTEXT_MENU)
            return onContextItemSelected(aMenuItem);
        else 
            return super.onMenuItemSelected(aFeatureId, aMenuItem);
    } 

    @Override
    public boolean onContextItemSelected(MenuItem item) {
        // Avoid using System.out.println() - instead use Android Logging
        return super.onContextItemSelected(item);
    }
}

现在，您可以创建此对话框的实例，您的视图将成功注册上下文项。所以你的openDialogMethod（）现在看起来像：

private void opendialog() {
    dialog = new MyDialog(MainActivity.this);
    // the context menu will now be registered
    dialog.show();
}

虽然您最初将活动的上下文传递给您正在创建的Dialog，但您无法传递这样的上下文菜单创建侦听器。要做到这一点，你必须按照我上面的说明继承你的对话框。

编辑：在查看Zsolt的答案之后，我发现我忽略了你没有的这行代码。你需要：

ringtone_layout.setOnCreateContextMenuListener(this);

你对强行调用上下文菜单的说法实际上是正确的。您只是调用常规菜单，然后将该ID传递给上下文菜单回调。 if子句通过，因为id来自上下文菜单功能。

经过一些进一步的阅读后，看起来你应该在onMenuItemSelected（）而不是onContextItemSelected（）上进行菜单处理。所以你现在拥有的是正确的，你不需要强行调用其他方法。只需在onMenuItemSelected（）中进行处理。

Answer 2

此问题已在以下SO线程中解决： onContextItemSelected doesn't get called和onContextItemSelected never called using a Dialog with a ListView。

如果答案都没有帮助你，试试这个：您在活动及其片段中的return false方法中onContextItemSelected。

Answer 3

public class MusicsetDialog extends Dialog implements OnClickListener {
    private RelativeLayout ringtone_layout;

    public MusicsetDialog(Context context) {
        super(context);
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.music_popup);
        setTitle(R.string.msettings);

        ringtone_layout = (RelativeLayout) findViewById(R.id.ringtone_layout);

        ringtone_layout.setOnClickListener(MusicsetDialog.this);

        registerForContextMenu(ringtone_layout);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
        case R.id.ringtone_layout:
            openContextMenu(ringtone_layout);
            break;          
        default:
            break;
        }
    }

    @Override
    public void onCreateContextMenu(ContextMenu menu, View v,
            ContextMenuInfo menuInfo) {
        menu.setHeaderTitle("Select The Action");
        // groupId, itemId, order,title
        menu.add(0, v.getId(), 0, "Edit");
        menu.add(0, v.getId(), 1, "Delete");
        super.onCreateContextMenu(menu, v, menuInfo);
    }

    @Override 
    public boolean onMenuItemSelected(int aFeatureId, MenuItem aMenuItem) {
        if (aFeatureId==Window.FEATURE_CONTEXT_MENU)
            return onContextItemSelected(aMenuItem);
        else 
            return super.onMenuItemSelected(aFeatureId, aMenuItem);
    } 

    @Override
    public boolean onContextItemSelected(MenuItem item) {
        // System.out.println("onContextItemSelected");
        Log.d("MusicsetDialog", "onContextItemSelected");
        return super.onContextItemSelected(item);
    }
}

我为mydialog和扩展Dialog创建了一个子类，并遵循Sunil的过程。但仍未调用onContextItemSelected。所以在做了一些研究后，我覆盖onMenuItemSelected并将选定的MenuItem传递给onContextItemSelected，它运行正常。可能是我强行打电话给onContextItemSelected。我不知道。我是android的新手，任何解释为什么onContextItemSelected仍未被自动调用将被赞赏..谢谢..

Answer 4

试试这个

new AlertDialog.Builder(this) 
        .setSingleChoiceItems(items, 0, null) 
        .setPositiveButton(R.string.ok_button_label, new DialogInterface.OnClickListener() { 
            public void onClick(DialogInterface dialog, int whichButton) {
                dialog.dismiss();
                int selectedPosition = ((AlertDialog)dialog).getListView().getCheckedItemPosition();
                // Do something useful withe the position of the selected radio button 
            } 
        }) 
        .show();

从Dialog窗口调用onContextItemSelected时不会触发它

4 个答案: