我们知道，在android开发中，未捕获的异常，会导致app奔溃，这里测试，让程序报一个空指针异常,并且不捕获，这时如图app奔溃，
，这时我们可以定义一个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. 在这里我是将异常发送到服务器，并且发送到我的邮箱，这时，我的邮箱就会收到一份异常信息，如图：
,,并且你也可以自定义异常崩溃界面，例如我自定义了一个toast，如图：
，具体实现如下：
1. 定义UncaughtException异常处理类
package com.jianhai.health.util.uncaughtexception;
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;
import com.jianhai.health.activiy.BuildConfig;
import com.jianhai.health.activiy.R;
import com.jianhai.health.db.uncaught.UnCaughtDBManager;
import com.jianhai.health.entity.uncaught.UncaughtExceptionItem;
import com.jianhai.health.util.MyActivityManager;
import com.jianhai.health.util.toast.ToastUtils;
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;
/**
* 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 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 infos = new HashMap();
//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 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);
} else {
try {
Thread.sleep(4500);
MyActivityManager.getIns().exit();
//退出程序
android.os.Process.killProcess(android.os.Process.myPid());
System.exit(1);
} catch (Exception e) {
Log.e(TAG, "error : ", e);
}
}
}
/**
* 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) {
try {
if (ex == null) {
return false;
}
//使用Toast来显示异常信息
new Thread() {
@Override
public void run() {
try {
Looper.prepare();
String des = "非常抱歉, 程序出现了不可预知的错误,即将退出, 小牛们将尽快为您修复。";
ToastUtils.makeErrorText( mContext, des).show();
Looper.loop();
} catch (Exception e) {
e.printStackTrace();
}
}
}.start();
//收集设备参数信息
collectDeviceInfo(mContext);
//上传异常
saveCrashInfo(ex);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 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 void saveCrashInfo(Throwable ex) {
try {
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);
if(BuildConfig.DEBUG){
Log.i("uncash", sb.toString());
}
long timestamp = System.currentTimeMillis();
String time = formatter.format(new Date());
String fileName = "crash-" + time + "-" + timestamp ;
// 上传到服务器
UncaughtExceptionItem item = new UncaughtExceptionItem(fileName, "",sb.toString());
UnCaughtDBManager.saveUncaughtExceptionItem(item); // 本地保存异常
UnCaughtDBManager.upLoatUnCaughts(); // 上传异常
} catch (Exception e) {
Log.e(TAG, "an error occured while writing file...", e);
}
}
}
然后在 Application中初始化：
package com.jianhai.health.application;
import org.litepal.LitePalApplication;
import android.content.Intent;
import android.content.IntentFilter;
import com.jianhai.health.entity.ClientUser;
import com.jianhai.health.receive.DrugAlarmRemaindReceiver;
import com.jianhai.health.util.AppManager;
import com.jianhai.health.util.uncaughtexception.CrashHandler;
/**
* 记录一些全局变量
* @author znn
*
*/
public class HGApplication extends LitePalApplication {
private static HGApplication instance;
/**
* 单例，返回一个实例
* @return
*/
public static HGApplication getInstance() {
return instance;
}
@Override
public void onCreate() {
super.onCreate();
instance = this;
AppManager.setContext(instance);
// 奔溃处理器
CrashHandler crashHandler = CrashHandler.getInstance();
crashHandler.init(getApplicationContext());
}
// 消息总记录数
public long messageTotalNum;
}
import java.io.Serializable;
import com.jianhai.health.entity.BaseDBEntity;
/**
* 未捕获异常对象信息
* @author znn
*
*/
public class UncaughtExceptionItem extends BaseDBEntity implements Serializable{
private static final long serialVersionUID = 1L;
private long id;
private String fileName; // 异常标题
private String context; //异常内容
private String sendEmail="n"; //是否发送了邮件,n=没有,y=发送了
public UncaughtExceptionItem(String fileName, String path,String context) {
super();
this.fileName = fileName;
this.context = context;
this.sendEmail="n";
}
public String getFileName() {
return fileName;
}
public void setFileName(String fileName) {
this.fileName = fileName;
}
public String getContext() {
return context;
}
public void setContext(String context) {
this.context = context;
}
public String getSendEmail() {
return sendEmail;
}
public void setSendEmail(String sendEmail) {
this.sendEmail = sendEmail;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
}
package com.jianhai.health.db.uncaught;
import java.util.List;
import org.apache.http.Header;
import org.json.JSONArray;
import org.json.JSONObject;
import org.litepal.crud.DataSupport;
import android.content.ContentValues;
import com.jianhai.health.entity.uncaught.UncaughtExceptionItem;
import com.jianhai.health.util.AppManager;
import com.jianhai.health.util.ProtocolType;
import com.jianhai.health.util.config.ConfigUtil;
import com.jianhai.health.util.emaill.EmailUtils;
import com.jianhai.health.util.http.AsyncHttpsClientUtils;
import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.AsyncHttpResponseHandler;
import com.loopj.android.http.PersistentCookieStore;
import com.loopj.android.http.RequestParams;
public class UnCaughtDBManager {
/**
* 在产生异常、网络变化-有网络、应用初始化
*
* 上传未读的异常
*
* 原因在于：有可能用户在没有网络的情况下点击出现了异常,所以需要将异常保存起来,在发送
*
*/
public static void upLoatUnCaughts(){
doBackground(findUncaughtExceptionItems());
}
public static void doBackground(final List list) {
try {
if(list == null || list.size() <=0){
return;
}
AsyncHttpClient client = AsyncHttpsClientUtils
.getAsyncHttpClient(AppManager.getContext());
PersistentCookieStore myCookieStore = new PersistentCookieStore(
AppManager.getContext());
client.setCookieStore(myCookieStore);
RequestParams params = new RequestParams();
params.put("protocol", ProtocolType.UNCAUGHT_EXCEPTION);
JSONArray arry = new JSONArray();
for(UncaughtExceptionItem item:list){
JSONObject obj = new JSONObject();
obj.put("ex", item.getContext()); // 异常内容
obj.put("fileName", item.getFileName()); // 异常标题
arry.put(obj);
if("n".equals(item.getSendEmail())){ // 如果没有发送过邮件,者发送
EmailUtils.sendEmail(item);
}
}
params.put("exs", arry);
client.post(ConfigUtil.getInstanse().getServerHost(), params,
new AsyncHttpResponseHandler() {
@Override
public void onFailure(int arg0, Header[] arg1,
byte[] arg2, Throwable error) {
// httpExceptionShow(error);
error.printStackTrace();
}
@Override
public void onSuccess(int arg0, Header[] arg1,
byte[] arg2) {
doPostExecute(arg2,list);
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
public static void updateSendEmail(UncaughtExceptionItem item){
ContentValues values = new ContentValues();
values.put("sendEmail","y");
DataSupport.update(UncaughtExceptionItem.class, values, item.getId());
}
private static void doPostExecute(byte[] arg2,List list) {
try {
String rs = new String(arg2, "utf-8");
JSONObject js = new JSONObject(rs);
if (js.getInt("res") == 0) {
deleteUncaughtExceptionItems(list);
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 找出异常
* @return
*/
public static List findUncaughtExceptionItems() {
List list = DataSupport.findAll(
UncaughtExceptionItem.class);
return list;
}
// 删除 已经发送
public static void deleteUncaughtExceptionItems(List list) {
for(UncaughtExceptionItem item:list){
DataSupport.deleteAll(UncaughtExceptionItem.class, "fileName=?",item.getFileName());
}
}
/**
* @param member
*/
public static void saveUncaughtExceptionItem(UncaughtExceptionItem item){
item.save();
}
}