justwyy的专栏

1、     List<String> list  删除操作：remove（value）；方法报错： java.lang.UnsupportedOperationException      解决办法：List<String>改成 ArrayList<String> ...

调用紧急电话，解决紧急电话界面 按home键，回到锁屏界面的 Button bt1 = (Button) findViewById(R.id.bt1); bt1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { ...

得到栈顶的activity： private String getTopActivity(){ ActivityManager manager = (ActivityManager) this.getSystemService(ACTIVITY_SERVICE); List<RunningTaskInfo> runningTaskInfos = manager....

转载： 深入理解android 卷II样章发布 http://blog.youkuaiyun.com/innost/article/details/7711882<!--StartFragment -->http://blog.youkuaiyun.com/innost/article/details/7648869

转载：http://blog.youkuaiyun.com/weich_java/article/details/7002829  public static Intent openFile(String filePath){ File file = new File(filePath); if(!file.exists()) return null; /* 取得扩展名 */...

http://www.cnblogs.com/error404/archive/2011/09/08/2170998.html  IntentFilter intentFilter = new IntentFilter();// intentFilter.addAction(Intent.ACTION_MEDIA_SCANNER_STARTED); // int...

转载：android sd卡状态、路径、可用空间，内存  sd卡状态、路径、可用空间byte，参考http://ai4work.blog.163.com/blog/static/189873306201182310304586/内存，参考http://blog.youkuaiyun.com/hudashi/article/details/7050897 manifest权限...

SAX,本地解析： try { SAX(getAssets().open("data.xml")); } catch (Exception e) { e.printStackTrace(); }  public void SAX(InputStream input) throws Exception { SAXP...

Drawable close = getResources().getDrawable(R.drawable.protect_icon); close.setBounds(0, 0, close.getIntrinsicWidth(), close.getIntrinsicHeight()); proTextView.setCompoundDrawables(close, ...

读取： http://blog.youkuaiyun.com/Android_Tutor/article/details/6238325 

判断当前数据库表中的字段是否存在： public boolean isEexit(){ try { String sql = "select url from app_table limit 0, 1"; Cursor c = db.rawQuery(sql, null); c.close(); return true ; } catch ...

一、判断apk是否安装的sd卡，还是手机内存  PackageInfo = ctx.getPackageManager().getPackageInfo(packageName, PackageManager.GET_UNINSTALLED_PACKAGES)boolean isSdcard = (packageInfo.applicationInfo.flags & ...

一、判断当前SD卡是否存在： public static boolean isSdcardAvaliable(){ boolean isAvaliable = false ; try { if(android.os.Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){ ...

public class Preferences { private String CONFIG_NAME = "pref"; private SharedPreferences spf; private Editor editor; private Context mContext; public Preferences(Context context) { th...

遍历SD卡实例。

public String getLocaleLanguage() { Locale l = Locale.getDefault(); return String.format("%s-%s", l.getLanguage(), l.getCountry());}   本地语言：中文返回：zh-CN 返回en-US(也可能是en-XX)表示英语,...

Android中获取应用程序(包)的信息-----PackageManager的使用 转载：http://www.cnblogs.com/Ryandroid/archive/2011/11/25/2263226.html 获取Android系统中应用程序的信息，主要包括packagename、label、icon、占用大小等。具体分为两个 部分，计划如下：       ...

瀑布流

根据包名获得APP的ICON 1、Drawable drawable3 = getPackageManager().getApplicationIcon(packName); 2、ApplicationInfo aInfo = getPackageManager().getApplicationInfo(info.packName,PackageManager.GET_ME...

 http://blog.youkuaiyun.com/feilong1105/article/details/6590759 1、写文件到SD卡  private void log(String log) { File file = new File(android.os.Environment .getExternalStorageDirectory().getPath() + "...

转载： http://www.cnblogs.com/jiezzy/archive/2012/04/21/2462191.html 注： 在Activity中有 getFileDir() 和 getCacheDir(); 方法可以获得当前的手机自带的存储空间中的当前包文件的路径 getFileDir() ----- /data/data/cn.xxx.xxx(当前包)/file...

转载： http://www.cnblogs.com/luxh/archive/2012/05/19/2509314.html http://developer.51cto.com/art/201205/339130.htm list转换成Iterator http://topic.youkuaiyun.com/u/20090605/16/8459f033-142d-4144-a5...

动画：http://www.apkbus.com/android-729-1-1.html http://www.htcplayer.com/thread-2852-1-1.html  大众点评：一、闪屏界面：    Intent intent = new Intent();intent.setClass(SplashActivity.this, MainA...

serviceToactivity 在Service中发送广播，Activity中接受。