Android实现将应用崩溃信息发送给开发者并重启应用的方法

时间:2021-10-21 08:39:00

本文实例讲述了android实现将应用崩溃信息发送给开发者并重启应用的方法。分享给大家供大家参考,具体如下:

在开发过程中,虽然经过测试,但在发布后,在广大用户各种各样的运行环境和操作下,可能会发生一些异想不到的错误导致程序崩溃。将这些错误信息收集起来并反馈给开发者,对于开发者改进优化程序是相当重要的。好了,下面就来实现这种功能吧。

(更正时间:2012年2月9日18时42分07秒)

由于为历史帖原因,以下做法比较浪费,但抓取异常的效果是一样的。

1.对于ui线程(即android中的主线程)抛出的未捕获异常,将这些异常信息存储起来然后关闭到整个应用程序。并再次启动程序,则进入崩溃信息反馈界面让用户将出错信息以email的形式发送给开发者。

2.对于非ui线程抛出的异常,则立即唤醒崩溃信息反馈界面提示用户将出错信息发送email。

效果图如下:

Android实现将应用崩溃信息发送给开发者并重启应用的方法

过程了解了,则需要了解的几个知识点如下:

1.拦截uncaughtexception

application.oncreate()是整个android应用的入口方法。在该方法中执行如下代码即可拦截uncaughtexception:

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uehandler = new uehandler(this);
// 设置异常处理实例
thread.setdefaultuncaughtexceptionhandler(uehandler);

2.抓取导致程序崩溃的异常信息

uehandler是thread.uncaughtexceptionhandler的实现类,在其public void uncaughtexception(thread thread, throwable ex)的实现中可以获取崩溃信息,代码如下:

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// fetch excpetion info
string info = null;
bytearrayoutputstream baos = null;
printstream printstream = null;
try {
  baos = new bytearrayoutputstream();
  printstream = new printstream(baos);
  ex.printstacktrace(printstream);
  byte[] data = baos.tobytearray();
  info = new string(data);
  data = null;
} catch (exception e) {
  e.printstacktrace();
} finally {
  try {
    if (printstream != null) {
      printstream.close();
    }
    if (baos != null) {
      baos.close();
    }
  } catch (exception e) {
    e.printstacktrace();
  }
}

3.程序抛异常后,要关闭整个应用

悲催的程序员,唉,以下三种方式都无效了,咋办啊!!!

3.1 android.os.process.killprocess(android.os.process.mypid());

3.2 activitymanager am = (activitymanager) getsystemservice(activity_service);
am.restartpackage("lab.sodino.errorreport");

3.3 system.exit(0)

好吧,*告诉我们:自己动手丰衣足食。

softapplication中声明一个变量need2exit,其值为true标识当前的程序需要完整退出;为false时该干嘛干嘛去。该变量在应用的启动activity.oncreate()处赋值为false。

在捕获了崩溃信息后,调用softapplication.setneed2exit(true)标识程序需要退出,并finish()掉acterrorreport,这时acterrorreport退栈,抛错的actoccurerror占据手机屏幕,根据activity的生命周期其要调用onstart(),则我们在onstart()处读取need2exit的状态,若为true,则也关闭到当前的activity,则退出了整个应用了。此方法可以解决一次性退出已开启了多个activity的application。详细代码请阅读下面的示例源码。

好了,代码如下:

lab.sodino.errorreport.softapplication.java

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package lab.sodino.errorreport;
import java.io.file;
import android.app.application;
/**
 * @author sodino e-mail:sodinoopen@hotmail.com
 * @version time:2011-6-9 下午11:49:56
 */
public class softapplication extends application {
  /** "/data/data/<app_package>/files/error.log" */
  public static final string path_error_log = file.separator + "data" + file.separator + "data"
      + file.separator + "lab.sodino.errorreport" + file.separator + "files" + file.separator
      + "error.log";
  /** 标识是否需要退出。为true时表示当前的activity要执行finish()。 */
  private boolean need2exit;
  /** 异常处理类。 */
  private uehandler uehandler;
  public void oncreate() {
    need2exit = false;
    uehandler = new uehandler(this);
    // 设置异常处理实例
    thread.setdefaultuncaughtexceptionhandler(uehandler);
  }
  public void setneed2exit(boolean bool) {
    need2exit = bool;
  }
  public boolean need2exit() {
    return need2exit;
  }
}

lab.sodino.errorreport.actoccurerror.java

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package lab.sodino.errorreport;
import java.io.file;
import java.io.fileinputstream;
import android.app.activity;
import android.content.intent;
import android.os.bundle;
import android.util.log;
import android.view.view;
import android.widget.button;
public class actoccurerror extends activity {
  private softapplication softapplication;
  /** called when the activity is first created. */
  @override
  public void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.main);
    softapplication = (softapplication) getapplication();
    // 一开始进入程序恢复为"need2exit=false"。
    softapplication.setneed2exit(false);
    log.d("android_lab", "actoccurerror.oncreate()");
    button btnmain = (button) findviewbyid(r.id.btnthrowmain);
    btnmain.setonclicklistener(new button.onclicklistener() {
      public void onclick(view v) {
        log.d("android_lab", "thread.main.run()");
        int i = 0;
        i = 100 / i;
      }
    });
    button btnchild = (button) findviewbyid(r.id.btnthrowchild);
    btnchild.setonclicklistener(new button.onclicklistener() {
      public void onclick(view v) {
        new thread() {
          public void run() {
            log.d("android_lab", "thread.child.run()");
            int i = 0;
            i = 100 / i;
          }
        }.start();
      }
    });
    // 处理记录于error.log中的异常
    string errorcontent = geterrorlog();
    if (errorcontent != null) {
      intent intent = new intent(this, acterrorreport.class);
      intent.setflags(intent.flag_activity_new_task);
      intent.putextra("error", errorcontent);
      intent.putextra("by", "error.log");
      startactivity(intent);
    }
  }
  public void onstart() {
    super.onstart();
    if (softapplication.need2exit()) {
      log.d("android_lab", "actoccurerror.finish()");
      actoccurerror.this.finish();
    } else {
      // do normal things
    }
  }
  /**
   * 读取是否有未处理的报错信息。<br/>
   * 每次读取后都会将error.log清空。<br/>
   *
   * @return 返回未处理的报错信息或null。
   */
  private string geterrorlog() {
    file fileerrorlog = new file(softapplication.path_error_log);
    string content = null;
    fileinputstream fis = null;
    try {
      if (fileerrorlog.exists()) {
        byte[] data = new byte[(int) fileerrorlog.length()];
        fis = new fileinputstream(fileerrorlog);
        fis.read(data);
        content = new string(data);
        data = null;
      }
    } catch (exception e) {
      e.printstacktrace();
    } finally {
      try {
        if (fis != null) {
          fis.close();
        }
        if (fileerrorlog.exists()) {
          fileerrorlog.delete();
        }
      } catch (exception e) {
        e.printstacktrace();
      }
    }
    return content;
  }
}

lab.sodino.errorreport.acterrorreport.java

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package lab.sodino.errorreport;
import android.app.activity;
import android.content.intent;
import android.os.bundle;
import android.util.log;
import android.view.view;
import android.widget.button;
import android.widget.edittext;
import android.widget.textview;
/**
 * @author sodino e-mail:sodinoopen@hotmail.com
 * @version time:2011-6-12 下午01:34:17
 */
public class acterrorreport extends activity {
  private softapplication softapplication;
  private string info;
  /** 标识来处。 */
  private string by;
  private button btnreport;
  private button btncancel;
  private btnlistener btnlistener;
  public void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.report);
    softapplication = (softapplication) getapplication();
    by = getintent().getstringextra("by");
    info = getintent().getstringextra("error");
    textview txthint = (textview) findviewbyid(r.id.txterrorhint);
    txthint.settext(geterrorhint(by));
    edittext editerror = (edittext) findviewbyid(r.id.editerrorcontent);
    editerror.settext(info);
    btnlistener = new btnlistener();
    btnreport = (button) findviewbyid(r.id.btnreport);
    btncancel = (button) findviewbyid(r.id.btncancel);
    btnreport.setonclicklistener(btnlistener);
    btncancel.setonclicklistener(btnlistener);
  }
  private string geterrorhint(string by) {
    string hint = "";
    string append = "";
    if ("uehandler".equals(by)) {
      append = " when the app running";
    } else if ("error.log".equals(by)) {
      append = " when last time the app running";
    }
    hint = string.format(getresources().getstring(r.string.errorhint), append, 1);
    return hint;
  }
  public void onstart() {
    super.onstart();
    if (softapplication.need2exit()) {
      // 上一个退栈的activity有执行“退出”的操作。
      log.d("android_lab", "acterrorreport.finish()");
      acterrorreport.this.finish();
    } else {
      // go ahead normally
    }
  }
  class btnlistener implements button.onclicklistener {
    @override
    public void onclick(view v) {
      if (v == btnreport) {
        // 需要 android.permission.send权限
        intent mailintent = new intent(intent.action_send);
        mailintent.settype("plain/text");
        string[] arrreceiver = { "sodinoopen@hotmail.com" };
        string mailsubject = "app error info[" + getpackagename() + "]";
        string mailbody = info;
        mailintent.putextra(intent.extra_email, arrreceiver);
        mailintent.putextra(intent.extra_subject, mailsubject);
        mailintent.putextra(intent.extra_text, mailbody);
        startactivity(intent.createchooser(mailintent, "mail sending..."));
        acterrorreport.this.finish();
      } else if (v == btncancel) {
        acterrorreport.this.finish();
      }
    }
  }
  public void finish() {
    super.finish();
    if ("error.log".equals(by)) {
      // do nothing
    } else if ("uehandler".equals(by)) {
      // 1.
      // android.os.process.killprocess(android.os.process.mypid());
      // 2.
      // activitymanager am = (activitymanager)
      // getsystemservice(activity_service);
      // am.restartpackage("lab.sodino.errorreport");
      // 3.
      // system.exit(0);
      // 1.2.3.都失效了,google你让悲催的程序员情何以堪啊。
      softapplication.setneed2exit(true);
      // ////////////////////////////////////////////////////
      // // 另一个替换方案是直接返回“home”
      // intent i = new intent(intent.action_main);
      // // 如果是服务里调用,必须加入newtask标识
      // i.setflags(intent.flag_activity_new_task);
      // i.addcategory(intent.category_home);
      // startactivity(i);
      // ////////////////////////////////////////////////////
    }
  }
}

lab.sodino.errorreport.uehandler.java

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package lab.sodino.uncaughtexception;
import java.io.bytearrayoutputstream;
import java.io.file;
import java.io.fileoutputstream;
import java.io.printstream;
import android.content.intent;
import android.util.log;
/**
 * @author sodino e-mail:sodinoopen@hotmail.com
 * @version time:2011-6-9 下午11:50:43
 */
public class uehandler implements thread.uncaughtexceptionhandler {
  private softapplication softapp;
  private file fileerrorlog;
  public uehandler(softapplication app) {
    softapp = app;
    fileerrorlog = new file(softapplication.path_error_log);
  }
  @override
  public void uncaughtexception(thread thread, throwable ex) {
    // fetch excpetion info
    string info = null;
    bytearrayoutputstream baos = null;
    printstream printstream = null;
    try {
      baos = new bytearrayoutputstream();
      printstream = new printstream(baos);
      ex.printstacktrace(printstream);
      byte[] data = baos.tobytearray();
      info = new string(data);
      data = null;
    } catch (exception e) {
      e.printstacktrace();
    } finally {
      try {
        if (printstream != null) {
          printstream.close();
        }
        if (baos != null) {
          baos.close();
        }
      } catch (exception e) {
        e.printstacktrace();
      }
    }
    // print
    long threadid = thread.getid();
    log.d("android_lab", "thread.getname()=" + thread.getname() + " id=" + threadid + " state=" + thread.getstate());
    log.d("android_lab", "error[" + info + "]");
    if (threadid != 1) {
      // 此处示例跳转到汇报异常界面。
      intent intent = new intent(softapp, acterrorreport.class);
      intent.setflags(intent.flag_activity_new_task);
      intent.putextra("error", info);
      intent.putextra("by", "uehandler");
      softapp.startactivity(intent);
    } else {
      // 此处示例发生异常后,重新启动应用
      intent intent = new intent(softapp, actoccurerror.class);
      // 如果<span style="background-color: rgb(255, 255, 255); ">没有new_task标识且</span>是ui线程抛的异常则界面卡死直到anr
      intent.setflags(intent.flag_activity_new_task);
      softapp.startactivity(intent);
      // write 2 /data/data/<app_package>/files/error.log
      write2errorlog(fileerrorlog, info);
      // kill app progress
      android.os.process.killprocess(android.os.process.mypid());
    }
  }
  private void write2errorlog(file file, string content) {
    fileoutputstream fos = null;
    try {
      if (file.exists()) {
        // 清空之前的记录
        file.delete();
      } else {
        file.getparentfile().mkdirs();
      }
      file.createnewfile();
      fos = new fileoutputstream(file);
      fos.write(content.getbytes());
    } catch (exception e) {
      e.printstacktrace();
    } finally {
      try {
        if (fos != null) {
          fos.close();
        }
      } catch (exception e) {
        e.printstacktrace();
      }
    }
  }
}

/res/layout/main.xml

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<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  >
  <textview
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello"
    />
  <button android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="throws exception by main thread"
    android:id="@+id/btnthrowmain"
  ></button>
  <button android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="throws exception by child thread"
    android:id="@+id/btnthrowchild"
  ></button>
</linearlayout>

/res/layout/report.xml

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<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical" android:layout_width="fill_parent"
  android:layout_height="fill_parent">
  <textview android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/errorhint"
    android:id="@+id/txterrorhint" />
  <edittext android:layout_width="fill_parent"
    android:layout_height="wrap_content" android:id="@+id/editerrorcontent"
    android:editable="false" android:layout_weight="1"></edittext>
  <linearlayout android:layout_width="fill_parent"
    android:layout_height="wrap_content" android:background="#96cdcd"
    android:gravity="center" android:orientation="horizontal">
    <button android:layout_width="fill_parent"
      android:layout_height="wrap_content" android:text="report"
      android:id="@+id/btnreport" android:layout_weight="1"></button>
    <button android:layout_width="fill_parent"
      android:layout_height="wrap_content" android:text="cancel"
      android:id="@+id/btncancel" android:layout_weight="1"></button>
  </linearlayout>
</linearlayout>

用到的string.xml资源为:

 

复制代码 代码如下:
<string name="errorhint">a error has happened %1$s.please click <i><b>"report"</b></i> to send the error information to us by email, thanks!!!</string>

 

重要的一点是要在androidmanifest.xml中对<application>节点设置android:name=".softapplication"

希望本文所述对大家android程序设计有所帮助。