Android 全局异常捕获
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<String,String> 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<String, String> 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<Activity> 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<Activity>(); } 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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