android 的几个黄色警告解决办法

转自:http://my.eoe.cn/864234/archive/5162.html

1：Handler

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// This Handler class should be static or leaks might occur: IncomingHandler @SuppressLint("HandlerLeak") private Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { }; };

解决方法：

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private Handler mHandler = new Handler(new Handler.Callback() { @Override public boolean handleMessage(Message msg) { return false; } });

警告原因：

2：SimpleDateFormat

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// To get local formatting use getDateInstance(), getDateTimeInstance(), or // getTimeInstance(), or use new SimpleDateFormat(String template, Locale // locale) with for example Locale.US for ASCII dates. @SuppressLint("SimpleDateFormat") SimpleDateFormat simpleDateFormat = new SimpleDateFormat( "yyyy-MM-ddHH:mm:ss");

解决方法：

1 2	SimpleDateFormat newSimpleDateFormat = new SimpleDateFormat( "yyyy年MM月dd日HH时mm分", Locale.getDefault());

警告原因：

**3：new HashMap() **

1 2	@SuppressLint("UseSparseArrays") public static Map<Integer, String> CMD_MAP = new HashMap<Integer, String>();

解决方法：

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//TODO

警告原因：Use new SparseArray(...) instead for better performance

4："String".toUpperCase(); "String".toLowerCase();

1 2	@SuppressLint("DefaultLocale") boolean b = "String".toUpperCase().equals("STRING");

解决方法：

1	boolean b = "String".equalsIgnoreCase("STRING");

警告原因：Implicitly using the default locale is a common source of bugs: Use toUpperCase(Locale) instead