增加日志文件夹监测(每4小时进行一次)，当检测到空间不足时，删除旧的日志文件

app/build.gradle

@@ -108,6 +108,8 @@ dependencies {
     def lifecycle_version = "2.2.0"
     implementation "androidx.lifecycle:lifecycle-extensions:$lifecycle_version"
     implementation "androidx.lifecycle:lifecycle-common-java8:$lifecycle_version"
+    def work_version = "2.3.1"
+    implementation "androidx.work:work-runtime:$work_version"
     implementation 'androidx.appcompat:appcompat:1.1.0'
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
     testImplementation 'junit:junit:4.13'

app/src/main/java/com/bgycc/smartcanteen/RootApp.java

@@ -12,8 +12,6 @@ import java.io.File;
 public class RootApp extends Application {
     private static final String LOG_PREFIX = "app";
     private static final String LOG_DIR = "log";
-    // 设置日志保存期限，避免日志过多占用内存空间
-    private static final int LOG_SAVE_DAYS = 7;
 
     @Override
     public void onCreate() {
@@ -25,7 +23,6 @@ public class RootApp extends Application {
                 .setDir(logDir)
                 .setLog2FileSwitch(true)
                 .setBorderSwitch(false)
-                .setFilePrefix(LOG_PREFIX)
-                .setSaveDays(LOG_SAVE_DAYS);
+                .setFilePrefix(LOG_PREFIX);
     }
 }

app/src/main/java/com/bgycc/smartcanteen/activity/MainActivity.java

@@ -35,6 +35,7 @@ import com.bgycc.smartcanteen.state.QRCodeState;
 import com.bgycc.smartcanteen.utils.NetworkUtils;
 import com.bgycc.smartcanteen.utils.SmartCanteenUtils;
 import com.bgycc.smartcanteen.utils.TTSHelper;
+import com.bgycc.smartcanteen.utils.WorkerUtils;
 import com.bgycc.smartcanteen.viewModel.CommandViewModel;
 import com.bgycc.smartcanteen.viewModel.PayOfflineViewModel;
 import com.bgycc.smartcanteen.viewModel.PayOnlineViewModel;
@@ -269,6 +270,7 @@ public class MainActivity extends AppCompatActivity implements View.OnClickListe
         commandViewModel.initialize();
         handler.post(updateTimeRunnable);
 
+        WorkerUtils.startLogFilesMonitor(this);
         SCWebSocketClient.getInstance().tryConnect();
     }
 
@@ -332,6 +334,7 @@ public class MainActivity extends AppCompatActivity implements View.OnClickListe
         TTSHelper.release();
         SCWebSocketClient.getInstance().realClose();
         SCTaskExecutor.getInstance().quit();
+        WorkerUtils.stopLogFilesMonitor(this);
     }
 
     private void initViews() {

app/src/main/java/com/bgycc/smartcanteen/utils/WorkerUtils.java

+package com.bgycc.smartcanteen.utils;
+
+import android.content.Context;
+
+import androidx.work.PeriodicWorkRequest;
+import androidx.work.WorkManager;
+
+import com.bgycc.smartcanteen.worker.LogFileMonitor;
+
+import java.util.concurrent.TimeUnit;
+
+public class WorkerUtils {
+    private static final String LOG_MONITOR_WORKER = "worker_log_monitor";
+
+    // 每隔一定时间检查日志文件夹并进行清理
+    public static void startLogFilesMonitor(Context context) {
+        PeriodicWorkRequest request = new PeriodicWorkRequest.Builder(LogFileMonitor.class, 4, TimeUnit.HOURS)
+                .addTag(LOG_MONITOR_WORKER)
+                .build();
+        WorkManager.getInstance(context)
+                .enqueue(request);
+    }
+
+    public static void stopLogFilesMonitor(Context context) {
+        WorkManager.getInstance(context)
+                .cancelAllWorkByTag(LOG_MONITOR_WORKER);
+    }
+}

app/src/main/java/com/bgycc/smartcanteen/worker/LogFileMonitor.java

+package com.bgycc.smartcanteen.worker;
+
+import android.content.Context;
+
+import androidx.annotation.NonNull;
+import androidx.work.Worker;
+import androidx.work.WorkerParameters;
+
+import com.blankj.utilcode.util.FileUtils;
+import com.blankj.utilcode.util.LogUtils;
+
+import java.io.File;
+import java.util.Collections;
+import java.util.List;
+
+import static com.bgycc.smartcanteen.utils.SmartCanteenUtils.TAG;
+
+public class LogFileMonitor extends Worker {
+    public LogFileMonitor(@NonNull Context context, @NonNull WorkerParameters workerParams) {
+        super(context, workerParams);
+    }
+
+    @NonNull
+    @Override
+    public Result doWork() {
+        String logDirPath = LogUtils.getConfig().getDir();
+        long totalSize = FileUtils.getFsTotalSize(logDirPath);
+        long availableSize = FileUtils.getFsAvailableSize(logDirPath);
+        LogUtils.d(TAG, "日志文件系统, 可用大小: " + availableSize
+                + ", 总大小: " + totalSize);
+        while (availableSize < (totalSize * 0.1f)) {
+            // 当可用小于10%时，删除旧日志文件
+            List<File> logFiles = LogUtils.getLogFiles();
+            Collections.sort(logFiles, (f1, f2) -> {
+                if (f1.lastModified() == f2.lastModified()) {
+                    return 0;
+                }
+                return (f1.lastModified() > f2.lastModified()) ? 1 : -1;
+            });
+            for (File f : logFiles.subList(0, 2)) {
+                FileUtils.delete(f);
+            }
+            totalSize = FileUtils.getFsTotalSize(logDirPath);
+            availableSize = FileUtils.getFsAvailableSize(logDirPath);
+        }
+        return Result.success();
+    }
+}
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