工具類

package me.maxd.demo.utils;

import android.annotation.SuppressLint;
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.Looper;
import android.util.Log;
import android.widget.Toast;

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;

/**
 * UncaughtExceptionHandler：執行緒未捕獲異常控制器是用來處理未捕獲異常的。
 * 如果程式出現了未捕獲異常預設情況下則會出現強行關閉對話方塊
 * 實現該介面並註冊為程式中的預設未捕獲異常處理
 * 這樣當未捕獲異常發生時，就可以做些異常處理操作
 * 例如：收集異常資訊，傳送錯誤報告 等。
 * <p>
 * UncaughtException處理類,當程式發生Uncaught異常的時候,由該類來接管程式,並記錄傳送錯誤報告.
 */
public class CrashHandler implements UncaughtExceptionHandler {

    private static final String TAG = "CrashHandler";

    // 系統預設的UncaughtException處理類
    private UncaughtExceptionHandler mDefaultHandler;
    // CrashHandler例項
    @SuppressLint("StaticFieldLeak")
    private static CrashHandler INSTANCE = new CrashHandler();
    // 程式的Context物件
    private Context mContext;
    // 用來儲存裝置資訊和異常資訊
    private Map<String, String> infos = new HashMap<String, String>();

    // 用於格式化日期,作為日誌檔名的一部分
    @SuppressLint("SimpleDateFormat")
    private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH-mm-ss SSS");

    private CrashHandler() {
    }

    /**
     * 獲取CrashHandler例項 ,單例模式
     *
     * @return the instance
     */
    public static CrashHandler getInstance() {
        return INSTANCE;
    }

    /**
     * 初始化
     *
     * @param context the context
     */
    public void init(Context context) {
        mContext = context;
        // 獲取系統預設的UncaughtException處理器
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
        // 設定該CrashHandler為程式的預設處理器
        Thread.setDefaultUncaughtExceptionHandler(this);
    }
    /**
     * 當UncaughtException發生時會轉入該函式來處理
     */
    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        if (!handleException(ex) && mDefaultHandler != null) {
            // 如果使用者沒有處理則讓系統預設的異常處理器來處理
            mDefaultHandler.uncaughtException(thread, ex);
        } else {
            try {
                Thread.sleep(2000);
            } catch (InterruptedException e) {
                Log.e(TAG, "error : ", e);
            }

           // SPUtils.getInstance().setLocalString("crash","");

            //SPUtils.getInstance().setLocalString("crash","0","crash");

         /*   Intent intent = new Intent(MyApplication.getAppContext(), WelcomeActivity.class);
            @SuppressLint("WrongConstant") PendingIntent restartIntent = PendingIntent.getActivity(MyApplication.getAppContext(), 0, intent,
                    Intent.FLAG_ACTIVITY_NEW_TASK);
            //退出程式
            AlarmManager mgr = (AlarmManager)MyApplication.getAppContext().getSystemService(Context.ALARM_SERVICE);
            assert mgr != null;
            mgr.set(AlarmManager.RTC, System.currentTimeMillis()+200,
                    restartIntent); // 1秒鐘後重啟應用*/
            // 退出程式
            android.os.Process.killProcess(android.os.Process.myPid());
            System.exit(1);
        }
    }

    /**
     * 自定義錯誤處理,收集錯誤資訊 傳送錯誤報告等操作均在此完成.
     *
     * @return true:如果處理了該異常資訊;否則返回false.
     */
    private boolean handleException(Throwable ex) {
        if (ex == null) {
            return false;
        }
        Log.e(TAG, "log : ", ex);
        // 使用Toast來顯示異常資訊
        new Thread() {
            @Override
            public void run() {
                Looper.prepare();
                android.widget.Toast.makeText(mContext, "很抱歉,程式出現異常。", Toast.LENGTH_LONG).show();
                Looper.loop();
            }
        }.start();
        // 收集裝置引數資訊
        collectDeviceInfo(mContext);
        // 儲存日誌檔案
        //saveCrashInfo2File(ex);
        return true;
    }

    /**
     * 收集裝置引數資訊
     *
     */
    private 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);
            }
        }
    }

    /**
     * 儲存錯誤資訊到檔案中
     *
     * @param ex
     * @return 返回檔名稱, 便於將檔案傳送到伺服器
     */
    private void 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).append("=").append(value).append("\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 {
            String time = formatter.format(new Date());
            String fileName = time + ".txt";
            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                File cacheDir = mContext.getCacheDir();
                if (!cacheDir.exists()) {
                    cacheDir.mkdirs();
                }
                FileOutputStream fos = new FileOutputStream("WeNet" + fileName);
                fos.write(sb.toString().getBytes("UTF-8"));
                fos.close();
            }
        } catch (Exception e) {
            Log.e(TAG, "an error occured while writing file...", e);
        }
    }
}
 

使用說明

請在application中初始化