详解Android全局异常的捕获处理

package hi.xiaoyu.crashhandler;import java.io.File;import java.io.FileWriter;import java.io.IOException;import java.lang.Thread.UncaughtExceptionHandler;import java.util.Date;import android.content.Context;import android.os.Environment;import android.util.Log;public class CrashHandler implements UncaughtExceptionHandler {  private static CrashHandler instance;  public static CrashHandler getInstance() {    if (instance == null) {      instance = new CrashHandler();    }    return instance;  }  public void init(Context ctx) {    Thread.setDefaultUncaughtExceptionHandler(this);  }  /**   * 核心方法，当程序crash 会回调此方法， Throwable中存放这错误日志   */  @Override  public void uncaughtException(Thread arg0, Throwable arg1) {    String logPath;    if (Environment.getExternalStorageState().equals(        Environment.MEDIA_MOUNTED)) {      logPath = Environment.getExternalStorageDirectory()          .getAbsolutePath()          + File.separator          + File.separator          + "log";      File file = new File(logPath);      if (!file.exists()) {        file.mkdirs();      }      try {        FileWriter fw = new FileWriter(logPath + File.separator            + "errorlog.log", true);        fw.write(new Date() + "/n");        // 错误信息        // 这里还可以加上当前的系统版本，机型型号 等等信息        StackTraceElement[] stackTrace = arg1.getStackTrace();        fw.write(arg1.getMessage() + "/n");        for (int i = 0; i < stackTrace.length; i++) {          fw.write("file:" + stackTrace[i].getFileName() + " class:"              + stackTrace[i].getClassName() + " method:"              + stackTrace[i].getMethodName() + " line:"              + stackTrace[i].getLineNumber() + "/n");        }        fw.write("/n");        fw.close();        // 上传错误信息到服务器        // uploadToServer();      } catch (IOException e) {        Log.e("crash handler", "load file failed...", e.getCause());      }    }    arg1.printStackTrace();    android.os.Process.killProcess(android.os.Process.myPid());  }}

CrashHandler crashHandler = CrashHandler.getInstance();crashHandler.init(getApplicationContext());