尝试解决二次启动时文件读取问题
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@@ -4,6 +4,7 @@ import android.content.BroadcastReceiver
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import android.content.Context
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import android.content.Intent
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import android.content.IntentFilter
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import android.content.SharedPreferences
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import android.net.Uri
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import android.os.BatteryManager
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import android.os.Build
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@@ -20,18 +21,17 @@ import java.io.BufferedReader
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import java.io.InputStreamReader
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class MainActivity : FlutterActivity() {
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// ---------- 充电状态 ----------
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private val CHARGE_CHANNEL = "com.lxh.battery_health/charge"
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private val EVENT_CHANNEL = "com.lxh.battery_health/charge_events"
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private var eventSink: EventChannel.EventSink? = null
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// ---------- SAF 相关 ----------
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private val SAF_CHANNEL = "com.lxh.battery_health/saf"
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private var safResult: MethodChannel.Result? = null
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private var safUri: Uri? = null
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private val FOLDER_PICKER_REQUEST = 1001
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private val PREF_NAME = "battery_health_prefs"
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private val KEY_SAF_URI = "saf_uri"
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// ---------- 充电广播接收器 ----------
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private val chargeReceiver = object : BroadcastReceiver() {
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override fun onReceive(context: Context?, intent: Intent?) {
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intent ?: return
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@@ -42,6 +42,46 @@ class MainActivity : FlutterActivity() {
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}
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}
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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android.util.Log.d("BatteryHealth", "onCreate 开始")
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try {
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val prefs: SharedPreferences = getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE)
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val uriString = prefs.getString(KEY_SAF_URI, null)
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android.util.Log.d("BatteryHealth", "SharedPreferences URI: $uriString")
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if (uriString != null) {
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safUri = Uri.parse(uriString)
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android.util.Log.d("BatteryHealth", "恢复 SAF URI 成功: $safUri")
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}
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} catch (e: Exception) {
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android.util.Log.e("BatteryHealth", "恢复 URI 异常: ${e.message}")
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}
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android.util.Log.d("BatteryHealth", "onCreate 结束，safUri = $safUri")
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}
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private fun saveUri(uri: Uri) {
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try {
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val prefs: SharedPreferences = getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE)
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prefs.edit().putString(KEY_SAF_URI, uri.toString()).apply()
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android.util.Log.d("BatteryHealth", "保存 SAF URI: $uri")
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} catch (e: Exception) {
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android.util.Log.e("BatteryHealth", "保存 URI 失败: ${e.message}")
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}
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}
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private fun restoreUri(uriString: String) {
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try {
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safUri = Uri.parse(uriString)
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android.util.Log.d("BatteryHealth", "通过 MethodChannel 恢复 URI: $safUri")
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// 同时保存到 SharedPreferences
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val prefs: SharedPreferences = getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE)
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prefs.edit().putString(KEY_SAF_URI, uriString).apply()
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} catch (e: Exception) {
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android.util.Log.e("BatteryHealth", "restoreUri 失败: ${e.message}")
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}
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}
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private fun sendChargeState(isCharging: Boolean) {
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val chargeType = if (isCharging) {
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val batteryIntent = registerReceiver(null, IntentFilter(Intent.ACTION_BATTERY_CHANGED))
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@@ -66,7 +106,6 @@ class MainActivity : FlutterActivity() {
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status == BatteryManager.BATTERY_STATUS_FULL
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}
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// ---------- SAF 方法 ----------
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private fun openFolderPicker() {
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try {
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val intent = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE).apply {
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@@ -100,7 +139,8 @@ class MainActivity : FlutterActivity() {
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val takeFlags = Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
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contentResolver.takePersistableUriPermission(uri, takeFlags)
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safUri = uri
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android.util.Log.d("BatteryHealth", "SAF URI: $uri")
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saveUri(uri)
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android.util.Log.d("BatteryHealth", "SAF 授权成功 URI: $uri")
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safResult?.success(uri.toString())
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} catch (e: Exception) {
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android.util.Log.e("BatteryHealth", "SAF 授权失败: ${e.message}")
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@@ -118,9 +158,13 @@ class MainActivity : FlutterActivity() {
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}
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private fun listFiles(): List<String> {
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android.util.Log.d("BatteryHealth", "listFiles 被调用，safUri = $safUri")
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val result = mutableListOf<String>()
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val docId = getTreeDocId()
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if (docId == null || docId.isEmpty()) return result
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if (docId == null || docId.isEmpty()) {
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android.util.Log.e("BatteryHealth", "docId 为空")
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return result
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}
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try {
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val childrenUri = DocumentsContract.buildChildDocumentsUriUsingTree(safUri!!, docId)
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@@ -134,7 +178,7 @@ class MainActivity : FlutterActivity() {
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}
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}
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} catch (e: Exception) {
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android.util.Log.e("BatteryHealth", "列出文件失败: ${e.message}")
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android.util.Log.e("BatteryHealth", "列出文件失败: ${e.message}", e)
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}
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return result
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}
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@@ -178,11 +222,9 @@ class MainActivity : FlutterActivity() {
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return fileUri?.let { readFile(it) }
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}
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// ---------- Flutter 通道配置 ----------
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override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
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super.configureFlutterEngine(flutterEngine)
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// 充电状态通道
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MethodChannel(flutterEngine.dartExecutor.binaryMessenger, CHARGE_CHANNEL)
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.setMethodCallHandler { call, result ->
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if (call.method == "getChargeState") {
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@@ -205,10 +247,18 @@ class MainActivity : FlutterActivity() {
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}
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}
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// SAF 通道
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MethodChannel(flutterEngine.dartExecutor.binaryMessenger, SAF_CHANNEL)
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.setMethodCallHandler { call, result ->
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when (call.method) {
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"restoreUri" -> {
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val uriString = call.argument<String>("uri")
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if (uriString != null) {
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restoreUri(uriString)
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result.success(true)
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} else {
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result.error("INVALID_ARGUMENT", "uri is required", null)
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}
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}
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"selectFolder" -> {
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safResult = result
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openFolderPicker()
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@@ -233,7 +283,6 @@ class MainActivity : FlutterActivity() {
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}
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}
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// 充电状态事件通道
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EventChannel(flutterEngine.dartExecutor.binaryMessenger, EVENT_CHANNEL)
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.setStreamHandler(
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object : EventChannel.StreamHandler {
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