Question

我使用了工具栏，所以现在我想在徽标图标上应用点击事件，我怎么能得到这个事件？

这是我做过的一些编码

Toolbar toolbar = null;
toolbar = (Toolbar) findViewById(R.id.actionToolbar);
setSupportActionBar(toolbar);
setTitle(null);
toolbar.setNavigationIcon(R.drawable.back);
toolbar.setNavigationContentDescription("BACK");
toolbar.setLogo(R.drawable.ic_launcher);
toolbar.setLogoDescription("LOGO");

toolbar.setNavigationOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Toast.makeText(MainActivity.this, "Nav", Toast.LENGTH_SHORT).show();
    }
});

这里我设置了导航图标和徽标图标，所以现在我想要logo图标的点击事件，怎么可能？

Answer 1

您需要首先参考它

View logoView = getToolbarLogoView(toolbar);
logoView.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        //logo clicked
    }
});

使用内容说明我们可以获得View参考。请参阅内联评论。

public static View getToolbarLogoIcon(Toolbar toolbar){
        //check if contentDescription previously was set
        boolean hadContentDescription = android.text.TextUtils.isEmpty(toolbar.getLogoDescription());
        String contentDescription = String.valueOf(!hadContentDescription ? toolbar.getLogoDescription() : "logoContentDescription");
        toolbar.setLogoDescription(contentDescription);
        ArrayList<View> potentialViews = new ArrayList<View>();
        //find the view based on it's content description, set programatically or with android:contentDescription
        toolbar.findViewsWithText(potentialViews,contentDescription, View.FIND_VIEWS_WITH_CONTENT_DESCRIPTION);
        //Nav icon is always instantiated at this point because calling setLogoDescription ensures its existence 
        View logoIcon = null;
        if(potentialViews.size() > 0){
            logoIcon = potentialViews.get(0);
        }
        //Clear content description if not previously present
        if(hadContentDescription)
            toolbar.setLogoDescription(null);
        return logoIcon;
    }

Answer 2

我问自己同样的问题并且遇到了这个问题。我对Nikola Despotoski采取了类似的方法，但采用了不同的实现方式。

而不是方法，我做的是：

// Set drawable
toolbar.setLogo(ContextCompat.getDrawable(context, R.drawable.logo));

// Find logo
View view = toolbar.getChildAt(1);
view.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
      // Perform actions
    }
  });

稍微有些黑客攻击，但稍后会再回来查看。分享用于讨论目的。

Answer 3

appcompat的长按事件行为：V7 ActionBar的徽标视图（ImageView）

    ActionBar actionBar = getSupportActionBar();
    actionBar.setLogo(R.drawable.logo_vjet);
    actionBar.setDisplayShowTitleEnabled(false);
    actionBar.setDisplayShowHomeEnabled(true);
    actionBar.setDisplayUseLogoEnabled(true);
    //find ActionBar View(ToolBar)
    View view = getWindow().getDecorView().findViewById(android.support.v7.appcompat.R.id.action_bar);
    if(view != null && view instanceof Toolbar){
        try {
            //find ImageView mLogoView; in Toolbar using reflect
            Field logoView = view.getClass().getDeclaredField("mLogoView");
            logoView.setAccessible(true);
            ImageView logoImageVIew = (ImageView) logoView.get(view);
            if(logoImageVIew != null){
                logoImageVIew.setOnLongClickListener(new View.OnLongClickListener() {
                    @Override
                    public boolean onLongClick(View v) {
                        //do something
                        return false;
                    }
                });
            }
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
    }

仅测试了android 7.0

工具栏的徽标图标是否可点击？

3 个答案: