feat: log export to Download

app/src/main/java/top/yeij/hearth/MainActivity.kt

@@ -2,6 +2,7 @@ package top.yeij.hearth
 
 import android.app.Activity
 import android.app.WallpaperManager
+import android.content.ContentValues
 import android.content.Intent
 import android.content.res.Configuration
 import android.graphics.Bitmap
@@ -10,6 +11,7 @@ import android.graphics.Color
 import android.graphics.drawable.GradientDrawable
 import android.net.Uri
 import android.os.Bundle
+import android.provider.MediaStore
 import android.provider.Settings
 import android.text.TextUtils
 import android.util.Base64
@@ -215,6 +217,7 @@ class MainActivity : Activity() {
             onShowTabPanel = { showNativeTabPanel() },
             storage = webAppStorage,
             onImportOfflinePackage = { id -> startImportOfflinePackage(id) },
+            onExportLog = { exportLog() },
         )
         root = FrameLayout(this)
         setContentView(root)
@@ -436,6 +439,34 @@ class MainActivity : Activity() {
     // dp to px
     private fun dp(v: Int): Int = (v * resources.displayMetrics.density).toInt()
 
+    // 导出日志到 Download 目录（读 logcat 本进程 + 过滤 Hearth 相关行）
+    // Export the log to the Download directory (read logcat, filter Hearth lines)
+    private fun exportLog(): String {
+        return try {
+            val process = Runtime.getRuntime().exec(arrayOf("logcat", "-d"))
+            val log = process.inputStream.bufferedReader().readText()
+            val filtered = log.lines()
+                .filter { it.contains("Hearth") }
+                .joinToString("\n")
+            val name = "hearth-log-" + System.currentTimeMillis() + ".txt"
+            val values = ContentValues().apply {
+                put(MediaStore.Downloads.DISPLAY_NAME, name)
+                put(MediaStore.Downloads.MIME_TYPE, "text/plain")
+                put(MediaStore.Downloads.RELATIVE_PATH, "Download/")
+            }
+            val uri = contentResolver.insert(MediaStore.Downloads.EXTERNAL_CONTENT_URI, values)
+                ?: return "导出失败：无法创建文件"
+            contentResolver.openOutputStream(uri)?.use { out ->
+                out.write(filtered.toByteArray())
+            } ?: return "导出失败：无法写入"
+            Log.d(TAG, "exportLog: $name (${filtered.length} chars)")
+            "已导出：Download/$name"
+        } catch (e: Exception) {
+            Log.e(TAG, "exportLog failed: ${e.message}")
+            "导出失败：${e.message}"
+        }
+    }
+
     // 触发 SAF 选择 zip 导入离线包
     // Trigger SAF to pick a zip for offline-package import
     private fun startImportOfflinePackage(id: String) {