android app 捕获全局异常，保存成文件

CrashHandler :

package com.example.petrochina_oil;import android.content.Context;import android.content.pm.PackageInfo;import android.content.pm.PackageManager;import android.os.Build;import android.os.Environment;import android.os.Process;import android.text.TextUtils;import android.util.Log;import java.io.IOException;import java.io.PrintWriter;import java.io.StringWriter;import java.io.Writer;import java.lang.reflect.Field;import java.text.SimpleDateFormat;import java.util.Date;import java.util.HashMap;import java.util.List;import java.util.Locale;import java.util.Map;import okhttp3.Call;import okhttp3.Callback;import okhttp3.FormBody;import okhttp3.OkHttpClient;import okhttp3.Request;import okhttp3.Response;/** * 作用: * 1.收集错误信息 * 2.保存错误信息 */public class CrashHandler implements Thread.UncaughtExceptionHandler {    private static CrashHandler sInstance = null;    private Thread.UncaughtExceptionHandler mDefaultHandler;    private Context mContext;    // 保存手机信息和异常信息    protected Map mMessage = new HashMap<>();    protected _Functions functions = new _Functions();    String path = Environment.getExternalStorageDirectory().getPath() + "/mileCrash/";    public static CrashHandler getInstance() {        if (sInstance == null) {            synchronized (CrashHandler.class) {                sInstance = new CrashHandler();            }        }        return sInstance;    }    private CrashHandler() {    }    /**     * 初始化默认异常捕获     *     * @param context context     */    public void init(Context context) {        mContext = context;        // 获取默认异常处理器        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();        // 将此类设为默认异常处理器        Thread.setDefaultUncaughtExceptionHandler(this);        List log_files = functions.getFilesAllName(path);        Log.d("init", "init");        for (int i = 0; i < log_files.size(); i++) {            postToServer(log_files.get(i));        }    }    @Override    public void uncaughtException(Thread t, Throwable e) {        if (!handleException(e)) {            // 未经过人为处理,则调用系统默认处理异常,弹出系统强制关闭的对话框            if (mDefaultHandler != null) {                mDefaultHandler.uncaughtException(t, e);            }        } else {            // 已经人为处理,系统自己退出            try {                Thread.sleep(3000);            } catch (InterruptedException e1) {                e1.printStackTrace();            }            Process.killProcess(Process.myPid());            System.exit(1);        }    }    /**     * 是否人为捕获异常     *     * @param e Throwable     * @return true:已处理 false:未处理     */    private boolean handleException(Throwable e) {        if (e == null) {// 异常是否为空            return false;        }        Log.e("CrashHandler", "捕捉到异常");        collectErrorMessages();        saveErrorMessages(e);        return false;    }    /**     * 1.收集错误信息     */    private void collectErrorMessages() {        PackageManager pm = mContext.getPackageManager();        try {            PackageInfo pi = pm.getPackageInfo(mContext.getPackageName(), PackageManager.GET_ACTIVITIES);            if (pi != null) {                String versionName = TextUtils.isEmpty(pi.versionName) ? "null" : pi.versionName;                String versionCode = "" + pi.versionCode;                mMessage.put("versionName", versionName);                mMessage.put("versionCode", versionCode);            }            // 通过反射拿到错误信息            Field[] fields = Build.class.getFields();            if (fields != null && fields.length > 0) {                for (Field field : fields) {                    field.setAccessible(true);                    try {                        mMessage.put(field.getName(), field.get(null).toString());                        Log.e("collectErrorMessages", "收集异常信息");                    } catch (IllegalAccessException e) {                        e.printStackTrace();                    }                }            }        } catch (PackageManager.NameNotFoundException e) {            e.printStackTrace();        }    }    /**     * 保存错误信息     *     * @param e Throwable     */    private void saveErrorMessages(Throwable e) {        Log.e("saveErrorMessages", "保存异常信息");        StringBuffer sb = new StringBuffer();        for (Map.Entry entry : mMessage.entrySet()) {            String key = entry.getKey();            String value = entry.getValue();            sb.append(key + "=" + value + "\n");        }        Writer writer = new StringWriter();        PrintWriter printWriter = new PrintWriter(writer);        e.printStackTrace(printWriter);        Throwable cause = e.getCause();        while (cause != null) {            cause.printStackTrace(printWriter);            cause = cause.getCause();        }        printWriter.close();        String result = writer.toString();        sb.append(result);        Log.e("saveErrorMessages", "异常信息: " + result);        saveToFile(result);    }    private void postToServer(final String file) {        Log.d("crashPostToServer", "start");        String strUrlPath = "http://119.3.56.22/index.php?m=Api&c=Alert&a=postAlert";        OkHttpClient client = new OkHttpClient();//创建OkHttpClient对象。        FormBody.Builder formBody = new FormBody.Builder();//创建表单请求体        //formBody.add("mid",Config.get("mac"));//传递键值对参数        formBody.add("code", "1001");//传递键值对参数        String result = functions.getStrFromFile2("", file);        Log.e("postToServer", "异常信息: " + result);        formBody.add("description", result);//传递键值对参数        Request request = new Request.Builder()//创建Request 对象。                .url(strUrlPath)                .post(formBody.build())//传递请求体                .build();        client.newCall(request).enqueue(new Callback() {            @Override            public void onFailure(Call call, IOException e) {            }            @Override            public void onResponse(Call call, Response response) throws IOException {                if (response.isSuccessful()) {//回调的方法执行在子线程。                    if (response.code() == 200) {                        functions.deleteSingleFile(file);                    }                }            }        });    }    private void saveToFile(String result) {        String time = new SimpleDateFormat("yyyy-MM-dd HH_mm_ss", Locale.CHINA).format(new Date());        String fileName = time + ".log";        functions.writeStrToFile2(result, fileName, path, false);    }}

调用：

CrashHandler.getInstance().init(this);

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