小编Rav*_*tel的帖子

关于这个话题有很多问题,但没有明确的答案.虽然android的内存管理非常扎实,但很多人认为我们不应该杀掉android应用程序.我的情况不同.我想要一个关闭应用程序的选项.我找到了关闭应用程序的以下代码,但有时它不起作用.当我点击我的应用程序上的退出按钮时,似乎应用程序只是刷新自己.

MainActivity.java

@Override
    public void onDestroy()
    {
        super.onDestroy();
        /*
         * Notify the system to finalize and collect all objects of the
         * application on exit so that the process running the application can
         * be killed by the system without causing issues. NOTE: If this is set
         * to true then the process will not be killed until all of its threads
         * have closed.
         */
        System.runFinalizersOnExit(true);

        /*
        * Force the system to close the application down completely instead of …

我发现此代码可以获得整体cpu使用率.这是否可以将其转换为通过进程告诉cpu使用情况？是否有任何API可以让我们获得android的CPU或内存使用？

private float readUsage() {
    try {
        RandomAccessFile reader = new RandomAccessFile("/proc/stat", "r");
        String load = reader.readLine();

        String[] toks = load.split(" ");

        long idle1 = Long.parseLong(toks[5]);
        long cpu1 = Long.parseLong(toks[2]) + Long.parseLong(toks[3]) + Long.parseLong(toks[4])
              + Long.parseLong(toks[6]) + Long.parseLong(toks[7]) + Long.parseLong(toks[8]);

        try {
            Thread.sleep(360);
        } catch (Exception e) {}

        reader.seek(0);
        load = reader.readLine();
        reader.close();

        toks = load.split(" ");

        long idle2 = Long.parseLong(toks[5]);
        long cpu2 = Long.parseLong(toks[2]) + Long.parseLong(toks[3]) + Long.parseLong(toks[4])
            + Long.parseLong(toks[6]) + Long.parseLong(toks[7]) + Long.parseLong(toks[8]);

        return (float)(cpu2 - cpu1) / …

我尝试过Smart Assembly并对它非常满意.它的错误报告功能很棒.依赖集成也是非常酷的功能.我的问题是有免费的替代品可以像智能装配一样工作吗？

我试过Eazfuscator.NET,这是一个很好的混淆器,但缺少两个我最喜欢的Smart Assembly.是否有任何免费工具可用于.Net框架的错误报告和依赖项集成.

初学者 android 程序员，我想在用户单击列表项时从字符串列表中添加和删除项目，但在尝试执行此操作时出现操作不支持错误。请参阅以下代码以了解我想要做什么。

@Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
        super.onListItemClick(l, v, position, id);
        if(myList != null)
        {
            StringBuilder stringBuilder = new StringBuilder();
            if(myList.contains(mylist1.get(position).getPackageName()))
            {
                for(int i = 0; i < myList.size(); i++)
                {
                    if(myList.get(i).equals(mylist1.get(position).getPackageName()))
                        continue;
                    if((myList.size() - 1) != i)
                        stringBuilder.append(myList.get(i)).append(separator);
                    else
                        stringBuilder.append(myList.get(i));
                }
                editor.putString("mypreference", stringBuilder.toString());
                mylistt1.get(position).setDisabled(false);
       //error happens in following
                myList.remove(mylist1.get(position).getPackageName());
            }
      }
}

这是日志猫

04-08 11:33:00.030: ERROR/AndroidRuntime(533): FATAL EXCEPTION: main
        java.lang.UnsupportedOperationException
        at java.util.AbstractList.remove(AbstractList.java:638)
        at java.util.AbstractList$SimpleListIterator.remove(AbstractList.java:75)
        at java.util.AbstractCollection.remove(AbstractCollection.java:229)
        at com.mypackage.myActivity.onListItemClick(myActivity.java:82)
        at android.app.ListActivity$2.onItemClick(ListActivity.java:319)
        at …

如何在C#中清除ListView？

以下是我填充ListView的方法:

int listViewCounter = 0;
for (int i = 0; i < dtXLS.Rows.Count; i++)
{
    listViewCounter++;

    ListViewItem item = new ListViewItem();
    item.Text = "First item" + listViewCounter;
    item.SubItems.Add("sadad" + listViewCounter);
    item.SubItems.Add("sadad" + listViewCounter);
    item.SubItems.Add("sadad" + listViewCounter);
    item.SubItems.Add("sadad" + listViewCounter);
    LV.Items.Add(item);

    LV.Items[listViewCounter - 1].SubItems[0].Text = listViewCounter.ToString();
    LV.Items[listViewCounter - 1].SubItems[1].Text = "sample1";
    LV.Items[listViewCounter - 1].SubItems[2].Text = "sample2";
    LV.Items[listViewCounter - 1].SubItems[3].Text = "sample3";
    LV.Items[listViewCounter - 1].SubItems[4].Text = "sample4";
}

结果将是:

1st Column    2nd Column    3rd Column    4th Column    5th Column
1             sample1 …