在項(xiàng)目中，我們的應(yīng)用經(jīng)常會(huì)遇到崩潰的情況，如果你的項(xiàng)目已經(jīng)發(fā)送到了應(yīng)用市場(chǎng)上，那么應(yīng)用發(fā)生的崩潰開(kāi)發(fā)人員是開(kāi)不到的，所以我們要想辦法將異常信息傳到服務(wù)器上，便于開(kāi)發(fā)人員查看并作出修改。Google考慮到這一點(diǎn)，也提供了Thread.UncaughtExceptionHandler接口來(lái)實(shí)現(xiàn)這一問(wèn)題。
創(chuàng)新互聯(lián)長(zhǎng)期為近1000家客戶提供的網(wǎng)站建設(shè)服務(wù)，團(tuán)隊(duì)從業(yè)經(jīng)驗(yàn)10年，關(guān)注不同地域、不同群體，并針對(duì)不同對(duì)象提供差異化的產(chǎn)品和服務(wù)；打造開(kāi)放共贏平臺(tái)，與合作伙伴共同營(yíng)造健康的互聯(lián)網(wǎng)生態(tài)環(huán)境。為寬城企業(yè)提供專業(yè)的成都網(wǎng)站制作、做網(wǎng)站、外貿(mào)營(yíng)銷網(wǎng)站建設(shè)，寬城網(wǎng)站改版等技術(shù)服務(wù)。擁有十多年豐富建站經(jīng)驗(yàn)和眾多成功案例,為您定制開(kāi)發(fā)。
創(chuàng)建Crash異常捕獲很簡(jiǎn)單，主要的步驟有：
1.創(chuàng)建BaseApplication繼承Application并實(shí)現(xiàn)Thread.UncaughtExceptionHandler
2.通過(guò)Thread.setDefaultUncaughtExceptionHandler(this)設(shè)置默認(rèn)的異常捕獲
3.最后在manifests中注冊(cè)創(chuàng)建的BaseApplication
一、異常捕捉的簡(jiǎn)單實(shí)用
重慶分公司
重慶分公司
public class BaseApplication extends Application implements Thread.UncaughtExceptionHandler {
@Override
public void onCreate() {
super.onCreate();
//設(shè)置異常捕獲
CrashHandler catchHandler = CrashHandler.getInstance();
catchHandler.init(this);
}
}
二、CrashHandler（主要是實(shí)現(xiàn)uncaughtException方法）
public class CrashHandler implements UncaughtExceptionHandler {
public static final String TAG = "CrashHandler";
// 系統(tǒng)默認(rèn)的UncaughtException處理類
private Thread.UncaughtExceptionHandler mDefaultHandler;
// CrashHandler實(shí)例
private static CrashHandler instance;
// 程序的Context對(duì)象
private Context mContext;
// 用來(lái)存儲(chǔ)設(shè)備信息和異常信息
private Map infos = new HashMap();
// 用于格式化日期,作為日志文件名的一部分
private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");
MyActivityLifecycleCallbacks mMyActivityLifecycleCallbacks = new MyActivityLifecycleCallbacks();
/** 保證只有一個(gè)CrashHandler實(shí)例 */
private CrashHandler() {
}
/** 獲取CrashHandler實(shí)例 ,單例模式 */
public static CrashHandler getInstance() {
if (instance == null)
instance = new CrashHandler();
return instance;
}
/**
* 初始化
*/
public void init(SspApplication context) {
mContext = context;
context.registerActivityLifecycleCallbacks(mMyActivityLifecycleCallbacks);
// 獲取系統(tǒng)默認(rèn)的UncaughtException處理器
mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
// 設(shè)置該CrashHandler為程序的默認(rèn)處理器
Thread.setDefaultUncaughtExceptionHandler(this);
}
/**
* 當(dāng)UncaughtException發(fā)生時(shí)會(huì)轉(zhuǎn)入該函數(shù)來(lái)處理
*/
@Override
public void uncaughtException(Thread thread, Throwable ex) {
if (!handleException(ex) && mDefaultHandler != null) {
// 如果用戶沒(méi)有處理則讓系統(tǒng)默認(rèn)的異常處理器來(lái)處理
mDefaultHandler.uncaughtException(thread, ex);
} else {
// try {
// Thread.sleep(3000);
// } catch (InterruptedException e) {
// Log.e(TAG, "error : ", e);
// }
// 注意Thread.sleep(3000)和 SystemClock.sleep(3000)的區(qū)別
SystemClock.sleep(3000);
// 退出程序
Log.i("=====killProcess======","=====killProcess======");
mMyActivityLifecycleCallbacks.removeAllActivities();
android.os.Process.killProcess(android.os.Process.myPid());
System.exit(0);
}
}
/**
* 自定義錯(cuò)誤處理,收集錯(cuò)誤信息 發(fā)送錯(cuò)誤報(bào)告等操作均在此完成.
*
* @param ex
* @return true:如果處理了該異常信息;否則返回false.
*/
private boolean handleException(Throwable ex) {
Log.i("=====handleException======","=====handleException======");
if (ex == null) {
return false;
}
// 收集設(shè)備參數(shù)信息
collectDeviceInfo(mContext);
// 使用Toast來(lái)顯示異常信息
new Thread() {
@Override
public void run() {
Looper.prepare();
Toast.makeText(mContext, "哎呀，出問(wèn)題了，我要暫時(shí)離開(kāi)了", Toast.LENGTH_SHORT).show();
Looper.loop();
}
}.start();
// 保存日志文件
saveCatchInfo2File(ex);
return true;
}
/**
* 收集設(shè)備參數(shù)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);
}
}
}
/**
* 保存錯(cuò)誤信息到文件中
*
* @param ex
* @return 返回文件名稱,便于將文件傳送到服務(wù)器
*/
private String saveCatchInfo2File(Throwable ex) {
StringBuffer sb = new StringBuffer();
for (Map.Entry 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());
SharedPreferences userInfo = mContext.getSharedPreferences(
Constants.USER_SETTING_INFOS, 0);
String loginName = userInfo.getString(Constants.USERNAME, "");
String fileName = "crash-" + time +"-"+loginName+ ".log";
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
String path = "/mnt/sdcard/crash/";
File dir = new File(path);
if (!dir.exists()) {
dir.mkdirs();
}
FileOutputStream fos = new FileOutputStream(path + fileName);
fos.write(sb.toString().getBytes());
// 發(fā)送給開(kāi)發(fā)人員
sendCrashLog2PM(path + fileName);
fos.close();
}
return fileName;
} catch (Exception e) {
Log.e(TAG, "an error occured while writing file...", e);
}
return null;
}
/**
* 將捕獲的導(dǎo)致崩潰的錯(cuò)誤信息發(fā)送給開(kāi)發(fā)人員
*
* 目前只將log日志保存在sdcard 和輸出到LogCat中，并未發(fā)送給后臺(tái)。
*/
private void sendCrashLog2PM(final String fileName) {
if (!new File(fileName).exists()) {
Toast.makeText(mContext, "日志文件不存在！", Toast.LENGTH_SHORT).show();
return;
} else {
new Thread(new Runnable() {
@Override
public void run() {
Looper.prepare();
ArrayList picList = new ArrayList();
picList.add(fileName);
SendEventPic sFile = new SendEventPic(mContext);
UUIDGenerator generator = new UUIDGenerator();
String linkId = generator.generate().toString();
SharedPreferences userInfo = mContext.getSharedPreferences(
Constants.USER_SETTING_INFOS, 0);
String loginName = userInfo.getString(Constants.USERNAME, "");
String userId = userInfo.getString(Constants.USER_USERID_INFOS, "");
boolean isproblempic = sFile.isSendSuccess(picList, linkId,
"crash_tng", "crash_tng", loginName, userId);
Looper.loop();
}
}).start();
}
FileInputStream fis = null;
BufferedReader reader = null;
String s = null;
try {
fis = new FileInputStream(fileName);
reader = new BufferedReader(new InputStreamReader(fis, "GBK"));
while (true) {
s = reader.readLine();
if (s == null)
break;
// 由于目前尚未確定以何種方式發(fā)送，所以先打出log日志。
Log.i("info", s.toString());
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally { // 關(guān)閉流
try {
reader.close();
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
三、開(kāi)發(fā)過(guò)程中遇到的坑
如果在activity創(chuàng)建的時(shí)候崩潰的話，系統(tǒng)有時(shí)候（目前不確定什么情況下會(huì)重啟）會(huì)重啟當(dāng)前的activity，造成第二次的崩潰，如此循環(huán)……
所以，在應(yīng)用崩潰時(shí)要完全退出應(yīng)用。
public class MyActivityLifecycleCallbacks implements ActivityLifecycleCallbacks {
private List activities = new LinkedList<>();
public static int sAnimationId = 0;
@Override
public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
addActivity(activity);
}
@Override
public void onActivityStarted(Activity activity) {
}
@Override
public void onActivityResumed(Activity activity) {
}
@Override
public void onActivityPaused(Activity activity) {
}
@Override
public void onActivityStopped(Activity activity) {
}
@Override
public void onActivitySaveInstanceState(Activity activity, Bundle outState) {
}
@Override
public void onActivityDestroyed(Activity activity) {
removeActivity(activity);
}
/**
* 添加Activity
*/
public void addActivity(Activity activity) {
if (activities == null) {
activities = new LinkedList<>();
}
if (!activities.contains(activity)) {
activities.add(activity);// 把當(dāng)前Activity添加到集合中
}
}
/**
* 移除Activity
*/
public void removeActivity(Activity activity) {
if (activities.contains(activity)) {
activities.remove(activity);
}
if (activities.size() == 0) {
activities = null;
}
}
/**
* 銷毀所有activity
*/
public void removeAllActivities() {
for (Activity activity : activities) {
if (null != activity) {
activity.finish();
activity.overridePendingTransition(0, sAnimationId);
}
}
}
}
以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持創(chuàng)新互聯(lián)。
