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安卓app运行中的crash崩溃异常日志收集

来源 https://blog.csdn.net/qq_17387361/article/details/52688998

在Android开发中,一个app在推广后。我们怎么才能知道这个app运行的如何,有没有出现崩溃等问题。这也就是app数据监控的一部分。下面的这个就是介绍关于crash日志的收集。这个就是核心代码:

import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import com.example.lianshou_test.MainActivity;
import com.example.lianshou_test.base.BaseActivity;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Build;
import android.os.Environment;
import android.os.Looper;
import android.util.Log;
import android.widget.Toast;


public class CrashHandler implements UncaughtExceptionHandler {
    public static final String TAG = "CrashHandler";

    // 系统默认的UncaughtException处理类
    private Thread.UncaughtExceptionHandler mDefaultHandler;
    // CrashHandler实例
    private static CrashHandler INSTANCE = new CrashHandler();
    // 程序的Context对象
    private Context mContext;
    // 用来存储设备信息和异常信息
    private Map<String, String> infos = new HashMap<String, String>();

    // 用于格式化日期,作为日志文件名的一部分
    private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");

    /** 保证只有一个CrashHandler实例 */
    private CrashHandler() {
    }

    /** 获取CrashHandler实例 ,单例模式 */
    public static CrashHandler getInstance() {
        return INSTANCE;
    }

    /**
     * 初始化
     * 
     * @param context
     */
    public void init(Context context) {
        mContext = context;
        // 获取系统默认的UncaughtException处理器
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
        // 设置该CrashHandler为程序的默认处理器
        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 (ex != null && ex.getCause() != null
                && ex.getCause().getMessage() != null
                && ex.getCause().getMessage().contains("PDF file is corrupted")) {
            Log.e(TAG, "error : " + ex.getCause().getMessage());
            Looper.prepare();
            Toast.makeText(mContext, "该文件已经损坏,请检查!",
                    Toast.LENGTH_SHORT).show();
            Looper.loop();
            // 收集设备参数信息
            collectDeviceInfo(mContext);
            // 保存日志文件
            saveCrashInfo2File(ex);
        } else {
            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 {
                try {
                    Thread.sleep(3000);
                } catch (InterruptedException e) {
                    Log.e(TAG, "error : ", e);
                }
                Intent intent = new Intent(mContext.getApplicationContext(),
                        MainActivity.class);
                PendingIntent restartIntent = PendingIntent.getActivity(
                        mContext.getApplicationContext(), 0, intent,
                        Intent.FLAG_ACTIVITY_NEW_TASK);
                // 退出程序
                AlarmManager mgr = (AlarmManager) mContext
                        .getSystemService(Context.ALARM_SERVICE);
                mgr.set(AlarmManager.RTC, System.currentTimeMillis() + 1000,
                        restartIntent); // 1秒钟后重启应用
                BaseActivity.getInstance().closeAll();
                // 退出程序
                android.os.Process.killProcess(android.os.Process.myPid());
                System.exit(1);
            }
        }
    }

    /**
     * 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.
     * 
     * @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) {
            return false;
        }
        // 使用Toast来显示异常信息
        new Thread() {
            @Override
            public void run() {
                Looper.prepare();
                Toast.makeText(mContext, "很抱歉,程序出现异常,即将退出.",
                        Toast.LENGTH_SHORT).show();
                Looper.loop();
            }
        }.start();
        // 收集设备参数信息
        collectDeviceInfo(mContext);
        // 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) {
        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 + "";
                infos.put("versionName", versionName);
                infos.put("versionCode", versionCode);
            }
        } catch (NameNotFoundException e) {
            Log.e(TAG, "an error occured when collect package info", e);
        }
        Field[] fields = Build.class.getDeclaredFields();
        for (Field field : fields) {
            try {
                field.setAccessible(true);
                infos.put(field.getName(), field.get(null).toString());
                Log.d(TAG, field.getName() + " : " + field.get(null));
            } catch (Exception e) {
                Log.e(TAG, "an error occured when collect crash info", e);
            }
        }
    }

    /**
     * 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 : infos.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 = formatter.format(new Date());
            String fileName = "crash-" + time + "-" + timestamp + ".log";
            if (Environment.getExternalStorageState().equals(
                    Environment.MEDIA_MOUNTED)) {
                String path = Environment
                        .getExternalStorageDirectory().getPath() + "/henry/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;
    }
}

由于这个是在很多activity中会用到的。因此建议在appliction中进行初始化操作

import java.util.ArrayList;
import java.util.List;

import com.yisa.qiqilogin.Handler.CrashHandler;

import android.app.Activity;
import android.app.Application;

/**
 * @ClassName: MyApplication
 * @Description: 获取context,在androidmanifest.xml文件中application标签<android:name="com.yisa.qiqilogin.util.MyApplication"
 * @author 
 * @date 2014-4-9 
 *
 */
public class MyApplication extends Application {
    private static MyApplication instance;

    public static MyApplication getInstance() {
         if (instance == null) {  
             instance = new MyApplication();  
         }  
         return instance; 
    }

    @Override
    public void onCreate() {
        super.onCreate();
        instance = this;
        CrashHandler.getInstance().init(getApplicationContext());  
    }

}

最后。我们在测试时对app制造一点运行崩溃的错误。如图:
blob.jpg

文章声明:发布者:小猿,转转请注明出处,谢谢!

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