通过CrashHandler来获取Android应用的崩溃信息

CrashHandler.java

public class CrashHandler implements UncaughtExceptionHandler {
    private static final String TAG = "CrashHandler";
    private static final boolean DEBUG = true;

    private static final String FILE_PATH = Environment.getExternalStorageDirectory().getPath() + "/CrashLog/";
    private static final String FILE_NAME = "crash";
    private static final String FILE_SUFFIX = ".log";

    private static CrashHandler sInstance = new CrashHandler();
    private Thread.UncaughtExceptionHandler mDefaultCrashHandler;
    private Context mContext;

    private CrashHandler() {
    }

    public static CrashHandler getInstance() {
        return sInstance;
    }

    public void init(Context context) {
        mDefaultCrashHandler = Thread.getDefaultUncaughtExceptionHandler();
        Thread.setDefaultUncaughtExceptionHandler(this);
        mContext = context.getApplicationContext();
    }

    /**
     * 这个是最关键的函数，当程序中有未被捕获的异常，系统将会自动调用#uncaughtException方法
     * thread为出现未捕获异常的线程，ex为未捕获的异常，有了这个ex，我们就可以得到异常信息
     */
    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        try {
            // 导出异常信息到SD卡中
            dumpExceptionToSDCard(ex);
            // 上传异常信息到服务器
            uploadExceptionToServer();
        } catch (IOException e) {
            e.printStackTrace();
        }

        ex.printStackTrace();
        // 如果系统提供了默认的异常处理器，则交给系统去结束程序，否则就由自己结束自己
        if (mDefaultCrashHandler != null) {
            mDefaultCrashHandler.uncaughtException(thread, ex);
        } else {
            Process.killProcess(Process.myPid());
        }
    }

    private void dumpExceptionToSDCard(Throwable ex) throws IOException {
        // 如果SD卡不存在或无法使用，则无法把异常信息写入SD卡
        if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
            if (DEBUG) {
                Log.w(TAG, "sdcard unmounted, skip dump exception");
                return;
            }
        }

        File dir = new File(FILE_PATH);
        if (!dir.exists()) {
            dir.mkdirs();
        }
        long current = System.currentTimeMillis();
        String time = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date(current));
        File file = new File(FILE_PATH + FILE_NAME + time + FILE_SUFFIX);

        try {
            PrintWriter pw = new PrintWriter(new BufferedWriter(new FileWriter(file)));
            pw.println(time);
            dumpPhoneInfo(pw);
            pw.println();
            ex.printStackTrace(pw);
            pw.close();
        } catch (Exception e) {
            Log.e(TAG, "dump crash info failed");
        }
    }

    private void dumpPhoneInfo(PrintWriter pw) throws PackageManager.NameNotFoundException {
        PackageManager pm = mContext.getPackageManager();
        PackageInfo pi = pm.getPackageInfo(mContext.getPackageName(), PackageManager.GET_ACTIVITIES);
        pw.print("App Version: ");
        pw.print(pi.versionName);
        pw.print('_');
        pw.println(pi.versionCode);

        // Android版本号
        pw.print("OS Version: ");
        pw.print(Build.VERSION.RELEASE);
        pw.print('_');
        pw.println(Build.VERSION.SDK_INT);

        // 设备制造商
        pw.print("Vendor: ");
        pw.println(Build.MANUFACTURER);

        // 设备型号
        pw.print("Model: ");
        pw.println(Build.MODEL);

        // CPU架构
        pw.print("CPU ABI: ");
        pw.println(Build.CPU_ABI);
    }

    private void uploadExceptionToServer() {
        // TODO Upload Exception Message To Your Web Server
    }

}

App.java

public class App extends Application {

    private static App sInstance;

    @Override
    public void onCreate() {
        super.onCreate();
        sInstance = this;
        // 在这里为应用设置异常处理，然后程序才能获取未处理的异常
        CrashHandler crashHandler = CrashHandler.getInstance();
        crashHandler.init(this);

    }

    public static App getInstance() {
        return sInstance;
    }
    
}