全局捕获异常日志

来源：互联网发布：win7软件打不开怎么办编辑：程序博客网时间：2024/06/07 21:09

实现系统提供的UncaughtExceptionHandler类

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.Environment;import android.os.Process;import android.util.Log;import java.io.BufferedWriter;import java.io.File;import java.io.FileWriter;import java.io.IOException;import java.io.PrintWriter;import java.lang.Thread.UncaughtExceptionHandler;import java.text.SimpleDateFormat;import java.util.Date;public class CrashHandler implements UncaughtExceptionHandler {    private static final String TAG = "CrashHandler";    private static final boolean DEBUG = true;    // 崩溃日志存储位置及文件    private static final String PATH = Environment.getExternalStorageDirectory().getPath() + "/CrashCollect/log/";    private static final String FILE_NAME = "crash";    private static final String FILE_NAME_SUFFIX = ".trace";    private static CrashHandler sInstance = new CrashHandler();    private UncaughtExceptionHandler mDefaultCrashHandler;    private Context mCtx;    private CrashHandler() {    }    public static CrashHandler getInstance() {        return sInstance;    }    public void init(Context context) {        mDefaultCrashHandler = Thread.getDefaultUncaughtExceptionHandler();        Thread.setDefaultUncaughtExceptionHandler(this);        mCtx = context.getApplicationContext();    }    /**     * 这个是最关键的函数，当程序中有未被捕获的异常，系统将会自动调用#uncaughtException方法     * thread为出现未捕获异常的线程，ex为未捕获的异常，有了这个ex，我们就可以得到异常信息     */    @Override    public void uncaughtException(Thread thread, Throwable ex) {        try {            //导出异常信息到SD卡中            dumpExceptionToSDCard(ex);            //这里可以通过网络上传异常信息到服务器，便于开发人员分析日志从而解决bug            uploadExceptionToServer();        } catch (IOException e) {            e.printStackTrace();        }        ex.printStackTrace();        //如果系统提供了默认的异常处理器，则交给系统去结束我们的程序，否则就由我们自己结束自己        if (mDefaultCrashHandler != null) {            mDefaultCrashHandler.uncaughtException(thread, ex);        } else {            Process.killProcess(Process.myPid());        }    }    private void dumpExceptionToSDCard(Throwable ex) throws IOException {         //如果SD卡不存在或无法使用，则无法把异常信息写入SD卡        if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {            if (DEBUG) {                Log.w(TAG, "sdcard unmounted,skip dump exception");                return;            }        }        File dir = new File(PATH);        if (!dir.exists()) {            dir.mkdirs();        }        long current = System.currentTimeMillis();        String time = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date(current));        File file = new File(PATH + FILE_NAME + time + FILE_NAME_SUFFIX);        try {            PrintWriter pw = new PrintWriter(new BufferedWriter(new FileWriter(file)));            pw.println(time);            dumpPhoneInfo(pw);            pw.println();            ex.printStackTrace(pw);            pw.close();        } catch (Exception e) {            Log.w(TAG, "dump crash info failed");        }    }    private void dumpPhoneInfo(PrintWriter pw) throws NameNotFoundException {        PackageManager pm = mCtx.getPackageManager();        PackageInfo pi = pm.getPackageInfo(mCtx.getPackageName(), PackageManager.GET_ACTIVITIES);        pw.print("App Version: ");        pw.print(pi.versionName);        pw.print('_');        pw.println(pi.versionCode);        //android版本号        pw.print("OS Version: ");        pw.print(Build.VERSION.RELEASE);        pw.print("_");        pw.println(Build.VERSION.SDK_INT);        //手机制造商        pw.print("Vendor: ");        pw.println(Build.MANUFACTURER);        //手机型号        pw.print("Model: ");        pw.println(Build.MODEL);        //cpu架构        pw.print("CPU ABI: ");        pw.println(Build.CPU_ABI);    }    private void uploadExceptionToServer() {        //TODO 上传崩溃信息至服务器    }}

在自己的Application类中初始化崩溃信息收集类CrashHandler

public class CurrentApplication extends Application {    private static CurrentApplication sInstance;    @Override    public void onCreate() {        super.onCreate();        sInstance = this;        // 在这里为应用设置异常处理程序，然后我们的程序才能捕获未处理的异常        CrashHandler crashHandler = CrashHandler.getInstance();        crashHandler.init(this);    }    public static CurrentApplication getInstance() {        return sInstance;    }}

实验一个错误

在Activity中添加 8/0; 后运行

public class OneActivity extends AppCompatActivity {    @Override     protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_one);        int i = 8 / 0;    }}

系统文件中会出现崩溃日志文件

如日志显示的错误结果相同，即除0错误

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