package jason.android.utils;
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.Environment;
import android.os.Looper;
import android.util.Log;
import android.widget.Toast;
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;
/**
* UncaughtException处理类,当程序发生Uncaught异常的时候,有该类来接管程序,并记录发送错误报告.
*
* @author user
*
*/
public class MyCrashHandler
implements UncaughtExceptionHandler {
public static final String TAG = "MyCrashHandler"
;
//系统默认的UncaughtException处理类
private Thread.UncaughtExceptionHandler mDefaultHandler;
//CrashHandler实例
private static MyCrashHandler INSTANCE =
new MyCrashHandler();
//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 DateFormat formatter =
new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss"
);
/** 保证只有一个CrashHandler实例 */
private MyCrashHandler() {
}
/** 获取CrashHandler实例 ,单例模式 */
public static MyCrashHandler 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);
} else {
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
);
}
}
/**
* 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());
Log.e("ytr"
,sb.toString());
fos.close();
}
return fileName;
} catch (Exception e) {
Log.e(TAG, "an error occured while writing file..."
, e);
}
return null;
}
}
转载于:https://www.cnblogs.com/jasonkent27/p/5093531.html
相关资源：Android CrashHandler编写自己的异常捕获的方法
