Android开发捕获异常

左手的ㄟ右手 2021-09-27 14:56 304阅读 0赞

package com.common;
    
    /**
     * Created by yuan-zhm on 2018/10/17.
     */
    
    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.Looper;
    import android.os.Process;
    import android.text.TextUtils;
    import android.widget.Toast;
    
    import java.io.File;
    import java.io.FileOutputStream;
    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.Locale;
    import java.util.Map;
    
    
    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
        private Map<String, String> mMessage = new HashMap<>();
    
        public static CrashHandler getInstance() {
            if (sInstance == null) {
                synchronized (CrashHandler.class) {
                    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);
        }
    
        @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(1000);
                } 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;
            }
            new Thread() {// 在主线程中弹出提示
                @Override
                public void run() {
                    Looper.prepare();
                    Toast.makeText(mContext, "捕获到异常", Toast.LENGTH_SHORT).show();
                    Looper.loop();
                }
            }.start();
            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());
                        } catch (IllegalAccessException e) {
                            e.printStackTrace();
                        }
                    }
                }
            } catch (PackageManager.NameNotFoundException e) {
                e.printStackTrace();
            }
        }
    
        /**
         * 2.保存错误信息
         *
         * @param e Throwable
         */
        private void saveErrorMessages(Throwable e) {
            StringBuilder sb = new StringBuilder();
            for (Map.Entry<String, String> entry : mMessage.entrySet()) {
                String key = entry.getKey();
                String value = entry.getValue();
                sb.append(key).append("=").append(value).append("\n");
            }
            Writer writer = new StringWriter();
            PrintWriter pw = new PrintWriter(writer);
            e.printStackTrace(pw);
            Throwable cause = e.getCause();
            // 循环取出Cause
            while (cause != null) {
                cause.printStackTrace(pw);
                cause = e.getCause();
            }
            pw.close();
            String result = writer.toString();
            sb.append(result);
            String time = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.CHINA).format(new Date());
            String fileName = "crash-" + time + "-" + System.currentTimeMillis() + ".log";
            // 有无SD卡
            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                String path = Environment.getExternalStorageDirectory().getPath() + "crash/";
                File dir = new File(path);
                if (!dir.exists()) dir.mkdirs();
                FileOutputStream fos = null;
                try {
                    fos = new FileOutputStream(path + fileName);
                    fos.write(sb.toString().getBytes());
                } catch (Exception e1) {
                    e1.printStackTrace();
                } finally {
                    if (fos != null) {
                        try {
                            fos.close();
                        } catch (IOException e1) {
                            e1.printStackTrace();
                        }
                    }
                }
            }
        }
    }

在application中的oncreat里面引入

CrashHandler.getInstance().init(this);

转载自[https://blog.csdn.net/klxh2009/article/details/77480108][https_blog.csdn.net_klxh2009_article_details_77480108]

[https_blog.csdn.net_klxh2009_article_details_77480108]: https://blog.csdn.net/klxh2009/article/details/77480108