【Android实战】Android中处理崩溃错误

public class MainActivity extends ActionBarActivity {	public CrashApplication application;	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);		application = (CrashApplication) getApplication();		application.addAct(this);		Button button = null;		button.setOnClickListener(new OnClickListener() {			@Override			public void onClick(View v) {				// TODO Auto-generated method stub			}		});	}	@Override	public boolean onCreateOptionsMenu(Menu menu) {		// Inflate the menu; this adds items to the action bar if it is present.		getMenuInflater().inflate(R.menu.main, menu);		return true;	}	@Override	public boolean onOptionsItemSelected(MenuItem item) {		// Handle action bar item clicks here. The action bar will		// automatically handle clicks on the Home/Up button, so long		// as you specify a parent activity in AndroidManifest.xml.		int id = item.getItemId();		if (id == R.id.action_settings) {			return true;		}		return super.onOptionsItemSelected(item);	}}

public class CrashApplication extends Application {	List<Activity> activityList = new ArrayList<Activity>();	@Override	public void onCreate() {		super.onCreate();		CrashHandler crashHandler = CrashHandler.getInstance();		crashHandler.init(getApplicationContext());	}	public void addAct(Activity a) {		activityList.add(a);	}	public void delAct(Activity a) {		activityList.remove(a);	}	public void finishActs() {		for (Activity a : activityList) {			if (null != a) {				a.finish();			}		}		android.os.Process.killProcess(android.os.Process.myPid());	}}

public class CrashHandler implements UncaughtExceptionHandler {	public static final String TAG = "CrashHandler";	// 系统默认的UncaughtException处理类	private Thread.UncaughtExceptionHandler mDefaultHandler;	// CrashHandler实例	private static CrashHandler INSTANCE = new CrashHandler();	// 程序的Context对象	private Context mContext;	// 用来存储设备信息和异常信息	private Map<String, String> infos = new HashMap<String, String>();	// 用于格式化日期,作为日志文件名的一部分	private SimpleDateFormat formatter = new SimpleDateFormat(			"yyyy-MM-dd-HH-mm-ss");	/** 保证只有一个CrashHandler实例 */	private CrashHandler() {	}	/** 获取CrashHandler实例 ,单例模式 */	public static CrashHandler getInstance() {		return INSTANCE;	}	/**	 * 初始化	 * 	 * @param context	 */	public void init(Context context) {		mContext = context;		// 获取系统默认的UncaughtException处理器		mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();		// 设置该CrashHandler为程序的默认处理器		Thread.setDefaultUncaughtExceptionHandler(this);	}	/**	 * 当UncaughtException发生时会转入该函数来处理	 */	@Override	public void uncaughtException(Thread thread, Throwable ex) {		if (!handleException(ex) && mDefaultHandler != null) {			// 如果用户没有处理则让系统默认的异常处理器来处理			mDefaultHandler.uncaughtException(thread, ex);			try {				Thread.sleep(3000);			} catch (InterruptedException e) {				Log.e(TAG, "error : ", e);			}			// 退出程序			android.os.Process.killProcess(android.os.Process.myPid());			System.exit(1);		} else {			try {				Thread.sleep(3000);			} catch (InterruptedException e) {				Log.e(TAG, "error : ", e);			}			// 退出程序						((CrashApplication) mContext).finishActs();		}		;	}	/**	 * 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成.	 * 	 * @param ex	 * @return true:如果处理了该异常信息;否则返回false.	 */	private boolean handleException(Throwable ex) {		if (ex == null) {			return false;		}		// 使用Toast来显示异常信息		new Thread() {			@Override			public void run() {				Looper.prepare();				Toast.makeText(mContext, "很抱歉,程序出现异常,即将退出.", Toast.LENGTH_LONG)						.show();				Looper.loop();			}		}.start();		// 收集设备参数信息		collectDeviceInfo(mContext);		// 保存日志文件		saveCrashInfo2File(ex);		return true;	}	/**	 * 收集设备参数信息	 * 	 * @param ctx	 */	public void collectDeviceInfo(Context ctx) {		try {			PackageManager pm = ctx.getPackageManager();			PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(),					PackageManager.GET_ACTIVITIES);			if (pi != null) {				String versionName = pi.versionName == null ? "null"						: pi.versionName;				String versionCode = pi.versionCode + "";				infos.put("versionName", versionName);				infos.put("versionCode", versionCode);			}		} catch (NameNotFoundException e) {			Log.e(TAG, "an error occured when collect package info", e);		}		Field[] fields = Build.class.getDeclaredFields();		for (Field field : fields) {			try {				field.setAccessible(true);				infos.put(field.getName(), field.get(null).toString());				Log.d(TAG, field.getName() + " : " + field.get(null));			} catch (Exception e) {				Log.e(TAG, "an error occured when collect crash info", e);			}		}	}	/**	 * 保存错误信息到文件中	 * 	 * @param ex	 * @return 返回文件名称,便于将文件传送到服务器	 */	private String saveCrashInfo2File(Throwable ex) {		StringBuffer sb = new StringBuffer();		for (Map.Entry<String, String> entry : infos.entrySet()) {			String key = entry.getKey();			String value = entry.getValue();			sb.append(key + "=" + value + "\n");		}		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();		String result = writer.toString();		sb.append(result);		try {			long timestamp = System.currentTimeMillis();			String time = formatter.format(new Date());			String fileName = "crash-" + time + "-" + timestamp + ".log";			if (Environment.getExternalStorageState().equals(					Environment.MEDIA_MOUNTED)) {				String path = "/sdcard/crash/";				File dir = new File(path);				if (!dir.exists()) {					dir.mkdirs();				}				FileOutputStream fos = new FileOutputStream(path + fileName);				fos.write(sb.toString().getBytes());				fos.close();			}			return fileName;		} catch (Exception e) {			Log.e(TAG, "an error occured while writing file...", e);		}		return null;	}}