Question

我正在开发一个Android应用程序。我注意到一个非常罕见的错误，导致我的应用程序崩溃。不幸的是，我的智能手机在发生时从未连接到我的电脑。那么，有没有办法在我的应用程序启动时自动将所有日志（尤其是抛出的runtimeexceptions）保存到文件中，以便我可以将此文件复制到我的电脑并分析错误？应用程序的每次启动都应该覆盖该文件，以便它只包含上次运行的日志...我该如何实现？

问候

Answer 1

您可以通过以下链接Writing crash reports into device sd card

找到帮助

您无需添加外部库。

import com.wordpress.doandroid.Training.R;

import android.app.Activity;
import android.os.Bundle;

public class CaptureExceptionActivity extends Activity {
 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);

 // Sets the default uncaught exception handler. This handler is invoked
 // in case any Thread dies due to an unhandled exception.
 Thread.setDefaultUncaughtExceptionHandler(new CustomizedExceptionHandler(
 "/mnt/sdcard/"));

 String nullString = null;
 System.out.println(nullString.toString());
 setContentView(R.layout.main);
 }
}

Handler实现

import java.io.File;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;
import java.text.SimpleDateFormat;
import java.util.Date;

import android.os.Environment;
import android.util.Log;

public class CustomizedExceptionHandler implements UncaughtExceptionHandler {

private UncaughtExceptionHandler defaultUEH;
 private String localPath;
 public CustomizedExceptionHandler(String localPath) {
 this.localPath = localPath;
 //Getting the the default exception handler
 //that's executed when uncaught exception terminates a thread
 this.defaultUEH = Thread.getDefaultUncaughtExceptionHandler();
 }

public void uncaughtException(Thread t, Throwable e) {

 //Write a printable representation of this Throwable
 //The StringWriter gives the lock used to synchronize access to this writer.
 final Writer stringBuffSync = new StringWriter();
 final PrintWriter printWriter = new PrintWriter(stringBuffSync);
 e.printStackTrace(printWriter);
 String stacktrace = stringBuffSync.toString();
 printWriter.close();

 if (localPath != null) {
 writeToFile(stacktrace);
 }

//Used only to prevent from any code getting executed.
 // Not needed in this example
 defaultUEH.uncaughtException(t, e);
 }

private void writeToFile(String currentStacktrace) {
 try {

 //Gets the Android external storage directory & Create new folder Crash_Reports
 File dir = new File(Environment.getExternalStorageDirectory(),
 "Crash_Reports");
 if (!dir.exists()) {
 dir.mkdirs();
 }

 SimpleDateFormat dateFormat = new SimpleDateFormat(
 "yyyy_MM_dd_HH_mm_ss");
 Date date = new Date();
 String filename = dateFormat.format(date) + ".STACKTRACE";

 // Write the file into the folder
 File reportFile = new File(dir, filename);
 FileWriter fileWriter = new FileWriter(reportFile);
 fileWriter.append(currentStacktrace);
 fileWriter.flush();
 fileWriter.close();
 } catch (Exception e) {
 Log.e("ExceptionHandler", e.getMessage());
 }
 }

}

不要忘记在清单WRITE_EXTERNAL_STORAGE

中添加此权限

Answer 2

尝试关注此问题。 Creating and Storing Log File on device in Android

最后一个答案非常有用。

Answer 3

我将在这里发布第二个答案的解决方案（由rrainn）： How do I obtain crash-data from my Android application?

Answer 4

您可以尝试ACRA (Application Crash Report for Android)库：

ACRA is a library enabling Android Application to automatically post their crash reports to a GoogleDoc form. It is targetted to android applications developers to help them get data from their applications when they crash or behave erroneously.

它很容易在您的应用中安装，高度可配置，不需要您在任何地方托管服务器脚本...报告将发送到Google Doc电子表格！

由于

Android保存每次运行崩溃报告的日志

4 个答案: