Question

我试图完全理解这个Android wheel widget是如何工作的，所以我可以适当地修改它。为了做到这一点，我逐行检查代码。在第一个文档的开头，清单中指定android.intent.category.LAUNCHER的活动，我找到了以下代码：

Intent intent = getIntent();
String path = intent.getStringExtra("com.example.android.apis.Path");

if (path == null) {
    path = "";
}

setListAdapter(new SimpleAdapter(
    this,
    getData(path), 
    android.R.layout.simple_list_item_1,
    new String[] { "title" },
    new int[] { android.R.id.text1 }));

getListView().setTextFilterEnabled(true);

我已经验证path将始终为null，因为调用intent（清单）不包含名为com.example.android.apis.Path的字符串。这意味着路径将始终设置为""。然而，getData(path)确实返回了适当的数据，即：

[{intent = Intent {cmp = kankan.wheel.demo / .CitiesActivity}，title = Cities}，{intent = Intent {cmp = tw.g35gtw.wheel.demo / tw.g35g.demo.CitiesActivity}， title = Cities}，{intent = Intent {cmp = kankan.wheel.demo / .DateActivity}，title = Date}，{intent = Intent {cmp = tw.g35gtw.wheel.demo / tw.g35g.demo.DateActivity} ，title = Date}，{intent = Intent {cmp = kankan.wheel.demo / .PasswActivity}，title = Password}，{intent = Intent {cmp = tw.g35gtw.wheel.demo / tw.g35g.demo.PasswActivity }，title = Password}，{intent = Intent {cmp = kankan.wheel.demo / .SlotMachineActivity}，title = Slot Machine}，{intent = Intent {cmp = tw.g35gtw.wheel.demo / tw.g35g.demo .SlotMachineActivity}，title = Slot Machine}，{intent = Intent {cmp = tw.g35gtw.wheel.demo / tw.g35g.demo.SwipeActivity}，title = Swipe}，{intent = Intent {cmp = kankan.wheel。 demo / .TimeActivity}，title = Time}，{intent = Intent {cmp = tw.g35gtw.wheel.demo / tw.g35g.demo.TimeActivity}，title = Time}，{intent = Intent {cmp = kankan.wheel .demo / .Time2Activity}，title = Time 2}，{intent = Intent {cmp = tw.g 35gtw.wheel.demo / tw.g35g.demo.Time2Activity}，title = Time 2}]

如果将空字符串以外的任何内容输入getData()，则不返回任何内容。我的问题是，空字符串如何获得正确的数据？原始编码器可能会给getData()一个默认值吗？如果是这样，我可以在哪里找到那些代码，以便我可以修改它？

另外，我无法在项目中找到名为kankan的包。 kankan.wheel.demo/.CitiesActivity可以成为在线资源吗？

使用Java的getData（）方法

0 个答案: