本文实例讲述了Android实现捕获未知异常并提交给服务器的方法。分享给大家供大家参考，具体如下：
在Android应用中，即便应用已经投放市场，但有时也会遇到一些未知的异常，此时如果能够获得用户的反馈信息，那么对于我们应用的开发是一个很好的帮助
为了实现这样的效果，我们需要做如下工作
写一个类实现UncaughtExceptionHandler接口，重写uncaughtException方法
功能描述：当应用出现了未知异常，应用强制退出，应用再次启动时，提示用户是否将错误信息反馈给开发者
public class MyUncaughtExceptionHandler implements UncaughtExceptionHandler { private static final String TAG = "MyUncaughtExceptionHandler"; // 将错误信息保存到sharepreference中 private static SharedPreferences bugPreferences; private static SharedPreferences.Editor bugEditor; private static Context mContext; private static PackageInfo packageInfo; private UncaughtExceptionHandler defaultUncaughtExceptionHandler; private static HandleProgressDialog progressDialog; // 保存错误原因的字段 private static String bugExistStr = ""; private static Handler handler = new Handler() { @Override public void handleMessage(Message msg) { progressDialog.dismiss(); } }; public MyUncaughtExceptionHandler(Context context) { try { mContext = context; packageInfo = context.getPackageManager().getPackageInfo( context.getPackageName(), 0); bugPreferences = context.getSharedPreferences("bug", 0); bugEditor = bugPreferences.edit(); defaultUncaughtExceptionHandler = Thread .getDefaultUncaughtExceptionHandler(); } catch (NameNotFoundException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } // 当异常发生时，会调用这个方法 public void uncaughtException(Thread th, Throwable t) { try { // 保存bug saveBugText(t); defaultUncaughtExceptionHandler.uncaughtException(th, t); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } private void saveBugText(Throwable ex) throws FileNotFoundException { Writer writer = new StringWriter(); PrintWriter printWriter = new PrintWriter(writer); ex.printStackTrace(printWriter); Throwable cause = ex.getCause(); while (cause != null) { cause.printStackTrace(printWriter); cause = cause.getCause(); } printWriter.close(); bugEditor.putString("bugText", writer.toString()); bugEditor.commit(); } // 下次开启应用的时候，如果上次产生了未知异常则显示对话框应用与用户反馈 public static void showBugReportDialog(final Context context) { bugExistStr = context.getSharedPreferences("bug", 0).getString( "bugText", ""); if (bugExistStr != null && !bugExistStr.equals("")) { AlertDialog.Builder builder = new AlertDialog.Builder(context); builder.setTitle(R.string.bug_report); builder.setMessage(R.string.whether_report_to_developer); builder.setNegativeButton(R.string.cancel, new OnClickListener() { public void onClick(DialogInterface dialog, int which) { finish(dialog); } }); builder.setPositiveButton(R.string.send, new OnClickListener() { public void onClick(DialogInterface dialog, int which) { // 提交bug到服务器 postBugReportInBackground(context); dialog.dismiss(); } }); AlertDialog dialog = builder.create(); dialog.show(); } } private static void postBugReportInBackground(final Context context) { progressDialog = new HandleProgressDialog(context); progressDialog.show(); new Thread(new Runnable() { public void run() { postBugReport(); // 将之前的bug信息清除掉 if (bugExistStr != null) { bugEditor.putString("bugText", ""); bugEditor.commit(); } handler.sendEmptyMessage(0); } }).start(); } /** * Send Bug Report. */ private static void postBugReport() { List<NameValuePair> nvps = new ArrayList<NameValuePair>(); nvps.add(new BasicNameValuePair("device", Build.DEVICE)); nvps.add(new BasicNameValuePair("model", Build.MODEL)); nvps.add(new BasicNameValuePair("sdk-version", Build.VERSION.SDK)); nvps.add(new BasicNameValuePair("apk-version", packageInfo.versionName)); nvps.add(new BasicNameValuePair("bug", bugExistStr)); try { HttpPost httpPost = new HttpPost(Constants.BaseUrl + "c=main&a=androidCrash"); httpPost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8)); DefaultHttpClient httpClient = new DefaultHttpClient(); HttpParams params = httpClient.getParams(); HttpConnectionParams.setConnectionTimeout(params, 5000); HttpConnectionParams.setSoTimeout(params, 5000); httpClient.execute(httpPost); } catch (IOException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } private static void finish(DialogInterface dialog) { if (bugExistStr != null) { bugEditor.putString("bugText", ""); bugEditor.commit(); } dialog.dismiss(); }}
在需要捕捉异常的地方调用
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); appApplication = (APPApplication) getApplication(); appApplication.activites.add(this); initViews(); Thread.setDefaultUncaughtExceptionHandler(new MyUncaughtExceptionHandler( MainActivity.this)); MyUncaughtExceptionHandler.showBugReportDialog(this); }
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希望本文所述对大家Android程序设计有所帮助。
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