Android CrashHandler编写自己的异常捕获的方法
平时写代码,我们可能会抛出各种异常,这些异常有些是我们测试过程中发现进行解决的,但是也有一些异常是我们未知的,不论是代码的逻辑问题还是Android本身底层的一些bug,我们都需要及时了解并进行解决。当用户在使用app出现崩溃现象时我们需要知道是什么原因,并将原因记录下来上到服务器,这样以后我们就可以知道具体是什么原因了
CrashHandler类
用于记录crash原因保存到sd卡中。
public class CrashHandler implements Thread.UncaughtExceptionHandler { private static final String TAG = "CrashHandler"; private static final boolean DEBUG = true; //文件路径 private static final String PATH = Environment.getExternalStorageDirectory().getPath() +File.separator+ "crash"; private static final String FILE_NAME = "crash"; private static final String FILE_NAME_SUFEIX = ".trace"; private static Thread.UncaughtExceptionHandler mDefaultCrashHandler; private static CrashHandler mCrashHandler = new CrashHandler(); private Context mContext; private CrashHandler() { } public static CrashHandler getInstance() { return mCrashHandler; } public void init(Context context) { mDefaultCrashHandler = Thread.getDefaultUncaughtExceptionHandler(); Thread.setDefaultUncaughtExceptionHandler(this); mContext = context.getApplicationContext(); } @Override public void uncaughtException(Thread thread, Throwable ex) { try { //将文件写入sd卡 writeToSDcard(ex); //写入后在这里可以进行上传操作 } catch (IOException e) { e.printStackTrace(); } catch (PackageManager.NameNotFoundException e) { e.printStackTrace(); } ex.printStackTrace(); //如果系统提供了默认异常处理就交给系统进行处理,否则自己进行处理。 if (mDefaultCrashHandler != null) { mDefaultCrashHandler.uncaughtException(thread, ex); } else { Process.killProcess(Process.myPid()); } } //将异常写入文件 private void writeToSDcard(Throwable ex) throws IOException, PackageManager.NameNotFoundException { //如果没有SD卡,直接返回 if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) { return; } File filedir = new File(PATH); if (!filedir.exists()) { filedir.mkdirs(); } long currenttime = System.currentTimeMillis(); String time = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date(currenttime)); File exfile = new File(PATH +File.separator+FILE_NAME+time + FILE_NAME_SUFEIX); PrintWriter pw = new PrintWriter(new BufferedWriter(new FileWriter(exfile))); Log.e("错误日志文件路径",""+exfile.getAbsolutePath()); pw.println(time); PackageManager pm = mContext.getPackageManager(); PackageInfo pi = pm.getPackageInfo(mContext.getPackageName(), PackageManager.GET_ACTIVITIES); //当前版本号 pw.println("App Version:" + pi.versionName + "_" + pi.versionCode); //当前系统 pw.println("OS version:" + Build.VERSION.RELEASE + "_" + Build.VERSION.SDK_INT); //制造商 pw.println("Vendor:" + Build.MANUFACTURER); //手机型号 pw.println("Model:" + Build.MODEL); //CPU架构 pw.println("CPU ABI:" + Build.CPU_ABI); ex.printStackTrace(pw); pw.close(); } }
调用
public class BaseApplication extends Application { @Override public void onCreate() { super.onCreate(); CrashHandler crashHandler=CrashHandler.getInstance(); crashHandler.init(this); } }
测试
mButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { throw new RuntimeException("抛出一个异常"); } });
最后记得添加文件权限,并调用BaseApplication
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