新增：异常捕获类，记录crash日志

app/src/main/java/com/idormy/sms/forwarder/CrashHandler.java

@@ -0,0 +1,185 @@
+package com.idormy.sms.forwarder;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.os.Build;
+import android.os.Looper;
+import android.util.Log;
+import android.widget.Toast;
+
+import androidx.annotation.NonNull;
+
+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 java.util.Objects;
+
+/**
+ * UncaughtException处理类,当程序发生Uncaught异常的时候,有该类来接管程序,并记录发送错误报告
+ */
+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
+    @SuppressLint("StaticFieldLeak")
+    private static final 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 final Map<String, String> infos = new HashMap<>();
+    //用于格式化日期,作为日志文件名的一部分
+    @SuppressLint("SimpleDateFormat")
+    private final 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
+     */
+    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(@NonNull Thread thread, @NonNull Throwable ex) {
+        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);
+            }            //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_LONG).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
+     */
+    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 (PackageManager.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(), Objects.requireNonNull(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
+     */
+    @SuppressWarnings({"ResultOfMethodCallIgnored", "UnusedReturnValue"})
+    private String saveCrashInfo2File(Throwable ex) {
+        StringBuilder sb = new StringBuilder();
+        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 {
+            long timestamp = System.currentTimeMillis();
+            String time = formatter.format(new Date());
+            String fileName = "crash-" + time + "-" + timestamp + ".log";
+
+            String path = mContext.getCacheDir().getPath() + File.separator + "crash" + File.separator;
+            Log.e(TAG, path);
+            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;
+    }
+}

app/src/main/java/com/idormy/sms/forwarder/MyApplication.java

@@ -44,6 +44,10 @@ public class MyApplication extends Application {
         super.onCreate();
         context = getApplicationContext();
 
+        //异常捕获类
+        CrashHandler crashHandler = CrashHandler.getInstance();
+        crashHandler.init(getApplicationContext());
+
         try {
             //前台服务
             Intent intent = new Intent(this, FrontService.class);