如何将我的日志输出从 logcat 重定向到 Android 设备上的 SD 卡？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/3359692/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to redirect my log output from logcat to the SD-Card on an android device?
提问by Santhosh Shettigar
I'm trying to redirect the log of my app to the sdcard file. But i failed to do so. I'm trying something like this.
我正在尝试将我的应用程序日志重定向到 sdcard 文件。但我没有这样做。我正在尝试这样的事情。
String cmd= "logcat -v time ActivityManager:W myapp:D *:* >\""+file.getAbsolutePath()+"\"";
Runtime.getRuntime().exec(cmd);
I tried the -f option also but it is not working either.
我也尝试了 -f 选项，但它也不起作用。
回答by broderix
This is my worked version:
这是我的工作版本：
try {
File filename = new File(Environment.getExternalStorageDirectory()+"/logfile.log");
filename.createNewFile();
String cmd = "logcat -d -f "+filename.getAbsolutePath();
Runtime.getRuntime().exec(cmd);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
find your logfile /sdcard/logfile.log
找到您的日志文件 /sdcard/logfile.log
回答by adamk
use logcat -f <filename>in order to dump it to a file in the filesystem.
Make sure the filename you're using is in the sdcard, i.e. starts with /sdcard/....
用于logcat -f <filename>将其转储到文件系统中的文件中。
确保您使用的文件名在 SD 卡中，即以/sdcard/....
Also, in order to pass arguments to the logcatprogram, you should pass the execmethod an array of strings (and not one string):
此外，为了向logcat程序传递参数，您应该向exec方法传递一个字符串数组（而不是一个字符串）：
String[] cmd = new String[] { "logcat", "-f", "/sdcard/myfilename", "-v", "time", "ActivityManager:W", "myapp:D" };
Finally, if all else fails, use the full path for logcat: /system/bin/logcatinstead of just logcat.
最后，如果所有其他方法都失败了，请使用 logcat: 的完整路径，/system/bin/logcat而不仅仅是logcat.
回答by bear
/**
* Launches a logcat process.
* To stop the logcat preserve the use:
* process.destroy();
* in the onBackPressed()
*
* @param filename destination of logcat output
* @return Process logcaat is running on
*/
public Process launchLogcat(String filename) {
Process process = null;
String cmd = "logcat -f " + filename + "\n";
try {
process = Runtime.getRuntime().exec(cmd);
} catch (IOException e) {
process = null;
}
return process;
}
回答by Green goblin
If you are getting an empty log file, try change the extension of file from .logto .txt.
如果您收到一个空的日志文件，尝试文件的扩展名从改变.log到.txt。
回答by Krishna
public static void saveLogInSDCard(Context context){
String filename = Environment.getExternalStorageDirectory() + File.separator + "project_app.log";
String command = "logcat -d *:V";
try{
Process process = Runtime.getRuntime().exec(command);
BufferedReader in = new BufferedReader(new InputStreamReader(process.getInputStream()));
String line = null;
try{
File file = new File(filename);
file.createNewFile();
FileWriter writer = new FileWriter(file);
while((line = in.readLine()) != null){
writer.write(line + "\n");
}
writer.flush();
writer.close();
}
catch(IOException e){
e.printStackTrace();
}
}
catch(IOException e){
e.printStackTrace();
}
}
回答by sai
Try using a space after every element in the string. Otherwise, it will consider as a single line command without spaces and do nothing.
尝试在字符串中的每个元素后使用空格。否则，它将被视为没有空格的单行命令并且什么也不做。
