LOG日志的抓取详解编程语言

开发过程中，经常不能将手机连接电脑，通过adb来抓取log，所以就把抓log的代码放到程序中，程序启动的时候调用抓取log的代码，这样就可以在本地查看log日志

/**** 
 * 保存ErrorLog日志到本地 
 * @author Dong 
 * 做成单利 
 */ 
public class SaveErrorLogToSDCard { 
	 
	public static SaveErrorLogToSDCard instance = new SaveErrorLogToSDCard(); 
	private SaveErrorLogToSDCard(){} 
	public static SaveErrorLogToSDCard getInstance() { 
		return instance; 
	} 
	 
	public void dumpLog2File(String fileName) { 
	        ArrayList<String> cmdLine = new ArrayList<String>(); 
	        cmdLine.add("logcat"); 
	        cmdLine.add("-v"); 
	        cmdLine.add("threadtime"); 
	        cmdLine.add("-f"); 
	        cmdLine.add(Environment.getExternalStorageDirectory() + "/" + fileName); 
	        File f = new File(Environment.getExternalStorageDirectory() + "/" + fileName); 
	        if (!f.getParentFile().exists()) 
	            f.getParentFile().mkdirs(); 
	        try { //捕获log 
	            Runtime.getRuntime().exec(cmdLine.toArray(new String[cmdLine.size()])); 
	        } catch (IOException e) { 
	            e.printStackTrace(); 
	        } 
	    } 
}