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Writing crash reports into device sd card

您不需要添加外部库.

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);

}

}

和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