创建类
public class CrashHandler implements Thread.UncaughtExceptionHandler {
private static final String TAG = "CrashHandler";
private Context mContext;
private static CrashHandler mInstance;
private Thread.UncaughtExceptionHandler mDefaultHandler;
// 用来存储设备信息和异常信息
private Map<String, String> mInfo = new HashMap<>();
private DateFormat mDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
private CrashHandler() {}
public static CrashHandler getInstance() {
if (mInstance == null) {
synchronized (CrashHandler.class) {
if (mInstance == null) {
mInstance = new CrashHandler();
}
}
}
return mInstance;
}
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);
}
@Override
public void uncaughtException(Thread t, Throwable e) {
// 如果用户没有处理则让系统默认的异常处理器来处理
if (!handleException(e) && mDefaultHandler != null) {
mDefaultHandler.uncaughtException(t, e);
} else {
try {
Thread.sleep(3000);
} catch (InterruptedException e1) {
Log.e(TAG, "error", e);
}
// 退出程序
Process.killProcess(Process.myPid());
System.exit(1);
}
}
// 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.
private boolean handleException(Throwable e) {
if (e == 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_SHORT).show();
Looper.loop();
}
}.start();
//收集设备参数信息
collectErrorInfo();
//保存日志文件
saveErrorInfo(e);
return true;
}
// 收集设备参数信息
private void collectErrorInfo() {
PackageManager pm = mContext.getPackageManager();
try {
PackageInfo pi = pm.getPackageInfo(mContext.getPackageName(), PackageManager.GET_ACTIVITIES);
if (pi != null) {
String versionName = TextUtils.isEmpty(pi.versionName) ? "未设置版本号" : pi.versionName;
String versionCode = pi.versionCode + "";
mInfo.put("versionName", versionName);
mInfo.put("versionCode", versionCode);
}
Field[] fields = Build.class.getFields();
if (fields != null && fields.length > 0) {
for (Field field : fields) {
field.setAccessible(true);
try {
mInfo.put(field.getName(), field.get(null).toString());
} catch (IllegalAccessException e) {
Log.e(TAG, "an error occured when collect crash info", e);
}
}
}
} catch (PackageManager.NameNotFoundException e) {
Log.e(TAG, "an error occured when collect package info", e);
}
}
// 保存错误信息到文件中
private void saveErrorInfo(Throwable e) {
StringBuffer stringBuffer = new StringBuffer();
for (Map.Entry<String, String> entry : mInfo.entrySet()) {
String keyName = entry.getKey();
String value = entry.getKey();
stringBuffer.append(keyName+"="+value+"\n");
}
Writer writer = new StringWriter();
PrintWriter printWriter = new PrintWriter(writer);
e.printStackTrace(printWriter);
Throwable cause = e.getCause();
while (cause != null) {
cause.printStackTrace(printWriter);
cause = cause.getCause();
}
printWriter.close();
String result = writer.toString();
stringBuffer.append(result);
long currentTime = System.currentTimeMillis();
String time = mDateFormat.format(new Date());
String fileName = "crash-" + time + "-" + currentTime + ".log";
// 判断有没有SD卡
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
File dir = new File(Environment.getExternalStorageDirectory().getAbsolutePath()+"/shanghaicrash");
if (!dir.exists()) {
dir.mkdirs();
}
FileOutputStream fos = null;
try {
fos = new FileOutputStream(dir + "/" + fileName);
fos.write(stringBuffer.toString().getBytes());
} catch (FileNotFoundException e1) {
Log.e(TAG, "an error occured due to file not found", e);
} catch (IOException e2) {
Log.e(TAG, "an error occured while writing file...", e);
} finally {
try {
fos.close();
} catch (IOException e1) {
Log.e(TAG, "an error occured when close file", e);
}
}
}
}
}