Android自定义捕获Application全局异常优化版

参考：

http://bigcat.easymorse.com/?p=1152

package qianlong.qlmobile.ui;import java.io.File;import java.io.FileOutputStream;import java.io.FilenameFilter;import java.io.PrintWriter;import java.io.StringWriter;import java.io.Writer;import java.lang.Thread.UncaughtExceptionHandler;import java.lang.reflect.Field;import java.util.Arrays;import java.util.Properties;import java.util.TreeSet;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.Looper;import android.text.format.Time;import android.util.Log;import android.view.Gravity;import android.widget.Toast;public class CrashHandler implements UncaughtExceptionHandler {/** Debug Log tag*/ public static final String TAG = "CrashHandler"; /** 是否开启日志输出,在Debug状态下开启, * 在Release状态下关闭以提示程序性能 * */ public static final boolean DEBUG = false; /** 系统默认的UncaughtException处理类 */ private Thread.UncaughtExceptionHandler mDefaultHandler; /** CrashHandler实例 */ private static CrashHandler INSTANCE; /** 程序的Context对象 */ private Context mContext; /** 使用Properties来保存设备的信息和错误堆栈信息*/ private Properties mDeviceCrashInfo = new Properties(); private static final String VERSION_NAME = "versionName"; private static final String VERSION_CODE = "versionCode"; private static final String STACK_TRACE = "STACK_TRACE"; /** 错误报告文件的扩展名 */ private static final String CRASH_REPORTER_EXTENSION = ".cr"; /** 保证只有一个CrashHandler实例 */ private CrashHandler() {} /** 获取CrashHandler实例 ,单例模式*/ public static CrashHandler getInstance() { if (INSTANCE == null) { INSTANCE = new CrashHandler(); } return INSTANCE; } /** * 初始化,注册Context对象, * 获取系统默认的UncaughtException处理器, * 设置该CrashHandler为程序的默认处理器 * @param ctx */ public void init(Context ctx) { mContext = ctx; mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler(); 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 { //Sleep一会后结束程序 try { Thread.sleep(5000); } catch (InterruptedException e) { Log.e(TAG, "Error : ", e); } android.os.Process.killProcess(android.os.Process.myPid()); System.exit(10); } } /** * 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. * 开发者可以根据自己的情况来自定义异常处理逻辑 * @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) { Log.w(TAG, "handleException --- ex==null"); return true; } final String msg = ex.getLocalizedMessage(); if(msg == null) {return false;}//使用Toast来显示异常信息 new Thread() { @Override public void run() { Looper.prepare(); Toast toast = Toast.makeText(mContext, "程序出错，即将退出:\r\n" + msg,Toast.LENGTH_LONG);toast.setGravity(Gravity.CENTER, 0, 0);toast.show();//MsgPrompt.showMsg(mContext, "程序出错啦", msg+"\n点确认退出");Looper.loop(); } }.start(); //收集设备信息 collectCrashDeviceInfo(mContext); //保存错误报告文件 saveCrashInfoToFile(ex); //发送错误报告到服务器 //sendCrashReportsToServer(mContext); return true; } /** * 在程序启动时候, 可以调用该函数来发送以前没有发送的报告 */ public void sendPreviousReportsToServer() { sendCrashReportsToServer(mContext); } /** * 把错误报告发送给服务器,包含新产生的和以前没发送的. * @param ctx */ private void sendCrashReportsToServer(Context ctx) { String[] crFiles = getCrashReportFiles(ctx); if (crFiles != null && crFiles.length > 0) { TreeSet<String> sortedFiles = new TreeSet<String>(); sortedFiles.addAll(Arrays.asList(crFiles)); for (String fileName : sortedFiles) { File cr = new File(ctx.getFilesDir(), fileName); postReport(cr); cr.delete();// 删除已发送的报告 } } } private void postReport(File file) { // TODO 发送错误报告到服务器 } /** * 获取错误报告文件名 * @param ctx * @return */ private String[] getCrashReportFiles(Context ctx) { File filesDir = ctx.getFilesDir(); FilenameFilter filter = new FilenameFilter() { public boolean accept(File dir, String name) { return name.endsWith(CRASH_REPORTER_EXTENSION); } }; return filesDir.list(filter); } /** * 保存错误信息到文件中 * @param ex * @return */ private String saveCrashInfoToFile(Throwable ex) { Writer info = new StringWriter(); PrintWriter printWriter = new PrintWriter(info); ex.printStackTrace(printWriter); Throwable cause = ex.getCause(); while (cause != null) { cause.printStackTrace(printWriter); cause = cause.getCause(); } String result = info.toString(); printWriter.close(); mDeviceCrashInfo.put("EXEPTION", ex.getLocalizedMessage());mDeviceCrashInfo.put(STACK_TRACE, result); try { //long timestamp = System.currentTimeMillis(); Time t = new Time("GMT+8"); t.setToNow(); // 取得系统时间int date = t.year * 10000 + t.month * 100 + t.monthDay;int time = t.hour * 10000 + t.minute * 100 + t.second;String fileName = "crash-" + date + "-" + time + CRASH_REPORTER_EXTENSION; FileOutputStream trace = mContext.openFileOutput(fileName, Context.MODE_PRIVATE); mDeviceCrashInfo.store(trace, ""); trace.flush(); trace.close(); return fileName; } catch (Exception e) { Log.e(TAG, "an error occured while writing report file...", e); } return null; } /** * 收集程序崩溃的设备信息 * * @param ctx */ public void collectCrashDeviceInfo(Context ctx) { try { PackageManager pm = ctx.getPackageManager(); PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(), PackageManager.GET_ACTIVITIES); if (pi != null) { mDeviceCrashInfo.put(VERSION_NAME, pi.versionName == null ? "not set" : pi.versionName); mDeviceCrashInfo.put(VERSION_CODE, ""+pi.versionCode); } } catch (NameNotFoundException e) { Log.e(TAG, "Error while collect package info", e); } //使用反射来收集设备信息.在Build类中包含各种设备信息, //例如: 系统版本号,设备生产商 等帮助调试程序的有用信息 //具体信息请参考后面的截图 Field[] fields = Build.class.getDeclaredFields(); for (Field field : fields) { try { field.setAccessible(true); mDeviceCrashInfo.put(field.getName(), ""+field.get(null)); if (DEBUG) { Log.d(TAG, field.getName() + " : " + field.get(null)); } } catch (Exception e) { Log.e(TAG, "Error while collect crash info", e); } } } }

用法：//全局数据存储public class App extends Application {private final static float HEAP_UTILIZATION = 0.75f;private final static int MIN_HEAP_SIZE = 6* 1024* 1024 ;   @Override   public void onCreate() {super.onCreate();// 异常处理，不需要处理时注释掉这两句即可！CrashHandler crashHandler = CrashHandler.getInstance(); // 注册crashHandler crashHandler.init(getApplicationContext()); // 优化内存,以下非必须！VMRuntime.getRuntime().setTargetHeapUtilization(HEAP_UTILIZATION);VMRuntime.getRuntime().setMinimumHeapSize(MIN_HEAP_SIZE);         //changeMetrics(this);//修改屏幕Density        ......   }｝

异常时写入文件，下面是data/data中生成的文件：

//private static final boolean DebugFlag = false;//修改屏幕Densitypublic static void changeMetrics(Context context) {        DisplayMetrics curMetrics = context.getResources().getDisplayMetrics();        if(!DebugFlag) {        if (curMetrics.densityDpi == DisplayMetrics.DENSITY_HIGH) {        DisplayMetrics metrics = new DisplayMetrics();        metrics.scaledDensity = 1.0f;        metrics.density = 1.0f;        metrics.densityDpi = DisplayMetrics.DENSITY_MEDIUM;        metrics.xdpi = DisplayMetrics.DENSITY_MEDIUM;        metrics.ydpi = DisplayMetrics.DENSITY_MEDIUM;        metrics.heightPixels = curMetrics.heightPixels;        metrics.widthPixels = curMetrics.widthPixels;        context.getResources().getDisplayMetrics().setTo(metrics);        }        } else {        DisplayMetrics metrics = new DisplayMetrics();        metrics.scaledDensity = (float)(130/160.0);        metrics.density = (float)(130/160.0);        metrics.densityDpi = 130;        metrics.xdpi = 130;        metrics.ydpi = 130;        metrics.heightPixels = curMetrics.heightPixels;        metrics.widthPixels = curMetrics.widthPixels;        context.getResources().getDisplayMetrics().setTo(metrics);        }}