Android 除錯技巧:

1.手機內做log除錯:
new Thread() {
@Override
public void run() {
Log.d("Environment.getExternalStorageDirectory()", String
.valueOf(Environment.getExternalStorageDirectory()));

// Calendar cal = Calendar.getInstance();
// cal.set(Calendar.MILLISECOND, 0);
// long timestamp = cal.getTimeInMillis();
  //  直接格式化輸出現在時間的方法
SimpleDateFormat sdFormat = new SimpleDateFormat("yyyy_MM_dd_HH_mm_ss");
Date current = new Date();

String dirName = "Demo_upload";
String rootPath = Environment.getExternalStorageDirectory()
+ "/"+dirName+"/";

File file = new File(rootPath);
if (!file.exists()) {
file.mkdirs();
Log.d("upload1","create dirname:"+rootPath);
}

Log.d("upload1","create dirname2:");

File filename = new File(
Environment.getExternalStorageDirectory() + "/"+dirName+"/"
+ sdFormat.format(current) + "_logfile.txt");
try {
filename.createNewFile();
String cmd = "logcat -v time -f " + filename +" upload1:D  *:S";
                                         //讓upload1這個tag等極為debug的訊息列出

Log.d("cmd result:", cmd);
Runtime.getRuntime().exec(cmd);
Log.d("cmd final", "");
} catch (IOException e) {
e.printStackTrace();
}

}
}.start();