Android全局异常捕获实例详解
Android 全局异常捕获
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今天就来说说作为程序猿的我们每天都会遇到的东西bug,出bug不可怕可怕的是没有出bug时的堆栈信息,那么对于bug的信息收集就显得尤为重要了,一般用第三方bugly或者友盟等等都能轻易收集,但是由于公司不让使用第三方,而安卓正好有原生的异常收集类UncaughtExceptionHandler,那么今天博客就从这个类开始.
UncaughtExceptionHandler见名知意,即他是处理我们未捕获的异常,具体使用分两步
1.实现我们自己的异常处理类
public class CrashHandler implements Thread.UncaughtExceptionHandler {
@Override
public void uncaughtException(Thread thread, Throwable ex) {
}
}
需要我们实现Thread.UncaughtExceptionHandler接口当有未捕获的异常的时候会回调uncaughtException(Thread thread, Throwable ex)方法
2.设置该CrashHandler为系统默认的
Thread.setDefaultUncaughtExceptionHandler(crashHandler);
以上只是使用步骤的介绍,具体项目中的使用我直接贴代码
在application中初始化
package com.zly.www.basedemo.base;
import android.app.Application;
import android.content.Context;
import com.zly.www.basedemo.exception.CrashHandler;
/**
* Created by zly on 2016/6/11.
*/
public class AppApplication extends Application {
private static Context mContext;
@Override
public void onCreate() {
super.onCreate();
this.mContext = this;
CrashHandler.getInstance().init(this);//初始化全局异常管理
}
public static Context getContext(){
return mContext;
}
}
CrashHandler 实现类如下
package com.zly.www.basedemo.exception;
import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Environment;
import android.os.Looper;
import android.util.Log;
import android.widget.Toast;
import com.zly.www.basedemo.utils.AppManager;
import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.reflect.Field;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
/**
* 全局异常捕获
* Created by zly on 2016/7/3.
*/
public class CrashHandler implements Thread.UncaughtExceptionHandler {
/**
* 系统默认UncaughtExceptionHandler
*/
private Thread.UncaughtExceptionHandler mDefaultHandler;
/**
* context
*/
private Context mContext;
/**
* 存储异常和参数信息
*/
private Map paramsMap = new HashMap<>();
/**
* 格式化时间
*/
private SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");
private String TAG = this.getClass().getSimpleName();
private static CrashHandler mInstance;
private CrashHandler() {
}
/**
* 获取CrashHandler实例
*/
public static synchronized CrashHandler getInstance(){
if(null == mInstance){
mInstance = new CrashHandler();
}
return mInstance;
}
public void init(Context context){
mContext = context;
mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
//设置该CrashHandler为系统默认的
Thread.setDefaultUncaughtExceptionHandler(this);
}
/**
* uncaughtException 回调函数
*/
@Override
public void uncaughtException(Thread thread, Throwable ex) {
if(!handleException(ex) && mDefaultHandler != null){//如果自己没处理交给系统处理
mDefaultHandler.uncaughtException(thread,ex);
}else{//自己处理
try {//延迟3秒杀进程
Thread.sleep(3000);
} catch (InterruptedException e) {
Log.e(TAG, "error : ", e);
}
//退出程序
AppManager.getAppManager().AppExit(mContext);
}
}
/**
* 收集错误信息.发送到服务器
* @return 处理了该异常返回true,否则false
*/
private boolean handleException(Throwable ex) {
if (ex == null) {
return false;
}
//收集设备参数信息
collectDeviceInfo(mContext);
//添加自定义信息
addCustomInfo();
//使用Toast来显示异常信息
new Thread() {
@Override
public void run() {
Looper.prepare();
Toast.makeText(mContext, "程序开小差了呢..", Toast.LENGTH_SHORT).show();
Looper.loop();
}
}.start();
//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) {
//获取versionName,versionCode
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 + "";
paramsMap.put("versionName", versionName);
paramsMap.put("versionCode", versionCode);
}
} catch (PackageManager.NameNotFoundException e) {
Log.e(TAG, "an error occured when collect package info", e);
}
//获取所有系统信息
Field[] fields = Build.class.getDeclaredFields();
for (Field field : fields) {
try {
field.setAccessible(true);
paramsMap.put(field.getName(), field.get(null).toString());
} catch (Exception e) {
Log.e(TAG, "an error occured when collect crash info", e);
}
}
}
/**
* 添加自定义参数
*/
private void addCustomInfo() {
}
/**
* 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 entry : paramsMap.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 = format.format(new Date());
String fileName = "crash-" + time + "-" + timestamp + ".log";
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
String path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/crash/";
File dir = new File(path);
if (!dir.exists()) {
dir.mkdirs();
}
FileOutputStream fos = new FileOutputStream(path + fileName);
fos.write(sb.toString().getBytes());
fos.close();
}
return fileName;
} catch (Exception e) {
Log.e(TAG, "an error occured while writing file...", e);
}
return null;
}
}
activity管理类
package com.zly.www.basedemo.utils;
import java.util.Stack;
import android.app.Activity;
import android.app.ActivityManager;
import android.content.Context;
/**
* Activity管理类：用于管理Activity和退出程序
* Created by zly on 2016/6/11.
*/
public class AppManager {
// Activity栈
private static Stack activityStack;
// 单例模式
private static AppManager instance;
private AppManager() {
}
/**
* 单一实例
*/
public static AppManager getAppManager() {
if (instance == null) {
instance = new AppManager();
}
return instance;
}
/**
* 添加Activity到堆栈
*/
public void addActivity(Activity activity) {
if (activityStack == null) {
activityStack = new Stack();
}
activityStack.add(activity);
}
/**
* 获取当前Activity（堆栈中最后一个压入的）
*/
public Activity currentActivity() {
Activity activity = activityStack.lastElement();
return activity;
}
/**
* 结束当前Activity（堆栈中最后一个压入的）
*/
public void finishActivity() {
Activity activity = activityStack.lastElement();
finishActivity(activity);
}
/**
* 结束指定的Activity
*/
public void finishActivity(Activity activity) {
if (activity != null) {
activityStack.remove(activity);
activity.finish();
activity = null;
}
}
/**
* 结束指定类名的Activity
*/
public void finishActivity(Class<?> cls) {
for (Activity activity : activityStack) {
if (activity.getClass().equals(cls)) {
finishActivity(activity);
break;
}
}
}
/**
* 结束所有Activity
*/
public void finishAllActivity() {
for (int i = 0; i < activityStack.size(); i++) {
if (null != activityStack.get(i)) {
activityStack.get(i).finish();
}
}
activityStack.clear();
}
/**
* 退出应用程序
*/
public void AppExit(Context context) {
try {
finishAllActivity();
//退出程序
android.os.Process.killProcess(android.os.Process.myPid());
System.exit(1);
} catch (Exception e) {
}
}
}
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