解决Android中Handler警告、SimpleDateFormat警告、"String".toUpperCase()警告
2015-06-26 16:51
274 查看
1:Handler
// 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:
private Handler mHandler = new Handler(new Handler.Callback() {
@Override
public boolean handleMessage(Message msg) {
return false;
}
});
警告原因:
2:SimpleDateFormat
// 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:
SimpleDateFormat newSimpleDateFormat = new SimpleDateFormat(
"yyyy年MM月dd日HH时mm分", Locale.getDefault());
3:new HashMap()
@SuppressLint("UseSparseArrays")
public static Map CMD_MAP = new HashMap();
警告原因:Use new SparseArray(...) instead for better performance
4:"String".toUpperCase(); "String".toLowerCase();
String.toUpperCase();
改为:
String.toUpperCase(Locale.US);
4000
//Locale.US 指定为英文
@SuppressLint("DefaultLocale")
boolean b = "String".toUpperCase().equals("STRING");
解决方法:
boolean b = "String".equalsIgnoreCase("STRING");
警告原因:Implicitly using the default locale is a common source of bugs: Use toUpperCase(Locale) instead
// 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:
private Handler mHandler = new Handler(new Handler.Callback() {
@Override
public boolean handleMessage(Message msg) {
return false;
}
});
警告原因:
2:SimpleDateFormat
// 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:
SimpleDateFormat newSimpleDateFormat = new SimpleDateFormat(
"yyyy年MM月dd日HH时mm分", Locale.getDefault());
3:new HashMap()
@SuppressLint("UseSparseArrays")
public static Map CMD_MAP = new HashMap();
警告原因:Use new SparseArray(...) instead for better performance
4:"String".toUpperCase(); "String".toLowerCase();
String.toUpperCase();
改为:
String.toUpperCase(Locale.US);
4000
//Locale.US 指定为英文
@SuppressLint("DefaultLocale")
boolean b = "String".toUpperCase().equals("STRING");
解决方法:
boolean b = "String".equalsIgnoreCase("STRING");
警告原因:Implicitly using the default locale is a common source of bugs: Use toUpperCase(Locale) instead
相关文章推荐
- 使用C++实现JNI接口需要注意的事项
- Android IPC进程间通讯机制
- Android Manifest 用法
- [转载]Activity中ConfigChanges属性的用法
- Android之获取手机上的图片和视频缩略图thumbnails
- Android之使用Http协议实现文件上传功能
- Android学习笔记(二九):嵌入浏览器
- android string.xml文件中的整型和string型代替
- i-jetty环境搭配与编译
- android之定时器AlarmManager
- android wifi 无线调试
- Android Native 绘图方法
- Android java 与 javascript互访(相互调用)的方法例子
- android 代码实现控件之间的间距
- android FragmentPagerAdapter的“标准”配置
- Android"解决"onTouch和onClick的冲突问题
- android:installLocation简析
- android searchView的关闭事件
- SourceProvider.getJniDirectories