Android如何防止异常奔溃以及拿到crash日志，处理线上问题定位

Android中防止程序崩溃，以及拿到crash日志分析定位

1.添加该工具类方法

public class CrashProtectManager {    private static CrashProtectManager mInstance;    private static Context mContext;    private CrashProtectManager() {    }    public static CrashProtectManager getInstance(Context context) {        if (mInstance == null) {            mContext = context.getApplicationContext();            mInstance = new CrashProtectManager();        }        return mInstance;    }    public void init() {        //crach 防护        Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {            @Override            public void uncaughtException(Thread t, Throwable e) {                handleFileException(e);                if (t == Looper.getMainLooper().getThread()) {                    handleMainThread(e);                }            }        });    }    //日志文件系统    private void handleFileException(Throwable e) {        //通过Throwable 生成字符串        Writer writer = new StringWriter();        PrintWriter printWriter = new PrintWriter(writer);        e.printStackTrace(printWriter);        printWriter.close();        String result = writer.toString();        //定义文件名        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");        String time = dateFormat.format(new Date());        String fileName = "crash-" + time + ".txt";        try {            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {                File cacheDir = mContext.getCacheDir();                if (!cacheDir.exists()) {                    cacheDir.mkdirs();                }                File cacheFile = new File(cacheDir.getAbsolutePath(), fileName);                if (!cacheDir.exists()) {                    cacheFile.createNewFile();                }                //把字符串写入到文件                FileOutputStream outputStream = new FileOutputStream(cacheFile);                outputStream.write(result.getBytes());                outputStream.close();            }        } catch (Exception e1) {            e1.printStackTrace();        }    }    private void handleMainThread(Throwable e) {        while (true) {            try {                Looper.loop();            } catch (Throwable e1) {                handleFileException(e1);            }        }    }}

2.在application中的onCreate()初始化

CrashProtectManager.getInstance(this).init();

3.日志生成的文件在

data/data/packagename/cahe 目录下

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