package io.hefuyi.zhihudaily;
import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Build;
import android.os.Debug;
import android.os.Environment;
import android.util.Log;
import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
/**
* 处理程序中未捕获的异常,将异常写入日志文件
*/
public class CrashHandler implements UncaughtExceptionHandler {
private static final String TAG = CrashHandler.class.getSimpleName();
private static CrashHandler instance = null;
private Context mContext;
private UncaughtExceptionHandler mDefaultHandler;
private final Map<String, String> infos = new HashMap<>();
private CrashHandler(Context context) {
mContext = context;
mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
Thread.setDefaultUncaughtExceptionHandler(this);
}
public static CrashHandler getInstance(Context context) {
if (instance == null) {
synchronized (CrashHandler.class) {
if (instance == null) {
instance = new CrashHandler(context);
}
}
}
return instance;
}
@Override
public void uncaughtException(Thread thread, Throwable ex) {
ex.printStackTrace();
if (!handleException(ex) && mDefaultHandler != null) {
mDefaultHandler.uncaughtException(thread, ex);
} else {
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
Log.e("error : ", e.getMessage());
}
System.exit(0);
}
}
private boolean handleException(final Throwable ex) {
// 如果是调试状态则不生成异常文件,让系统默认的异常处理器来处理
if (Debug.isDebuggerConnected())
return false;
if (ex == null)
return false;
// 收集设备参数信息
collectDeviceInfo(mContext);
// 保存日志文件
saveCrashInfo2File(ex);
return true;
}
private 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 occurred 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());
} catch (Exception e) {
Log.e(TAG, "an error occurred when collect crash info", e);
}
}
}
private void 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);
DateFormat df = new SimpleDateFormat("yyyyMMddHHmmssSSS");
try {
String fileName = String.format("crash-%s.log", df.format(new Date(System.currentTimeMillis())));
if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) {
String path = "/sdcard/daily/log/";
File dir = new File(path);
if (!dir.exists())
dir.mkdirs();
FileOutputStream fos = new FileOutputStream(path + fileName);
fos.write(sb.toString().getBytes());
fos.close();
}
} catch (Exception e) {
Log.e(TAG, "an error occured while writing file...", e);
}
}
}