feat: 改用系统安装器弹窗(FileProvider+ACTION_VIEW), 无需手动找权限

packages/client-android/android/app/src/main/AndroidManifest.xml

@@ -19,5 +19,15 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="${applicationId}.fileprovider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/file_paths" />
+        </provider>
     </application>
 </manifest>

packages/client-android/android/app/src/main/java/dev/yuzu/gca/MainActivity.kt

@@ -19,6 +19,7 @@ import java.net.HttpURLConnection
 import java.net.URL
 import java.security.MessageDigest
 import android.util.Log
+import androidx.core.content.FileProvider
 import org.json.JSONObject
 
 class MainActivity : AppCompatActivity() {
@@ -210,44 +211,12 @@ class MainActivity : AppCompatActivity() {
     }
 
     private fun installApk(apkFile: File) {
-        if (!packageManager.canRequestPackageInstalls()) {
-            val intent = Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS).apply {
-                data = Uri.parse("package:$packageName")
-                addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
-            }
-            startActivity(intent)
-            throw SecurityException("请开启安装未知应用权限后重试")
-        }
-        val packageInstaller = packageManager.packageInstaller
-        val params = PackageInstaller.SessionParams(PackageInstaller.SessionParams.MODE_FULL_INSTALL)
-        val sessionId = packageInstaller.createSession(params)
-        val session: PackageInstaller.Session
-        try {
-            session = packageInstaller.openSession(sessionId)
-        } catch (e: Exception) {
-            packageInstaller.abandonSession(sessionId)
-            throw e
-        }
-        try {
-            apkFile.inputStream().use { input ->
-                session.openWrite("package", 0, apkFile.length()).use { output ->
-                    input.copyTo(output)
-                    session.fsync(output)
-                }
-            }
-            val launchIntent = packageManager.getLaunchIntentForPackage(packageName)
-                ?: throw Exception("无法获取启动Intent")
-            val pendingIntent = PendingIntent.getActivity(
-                this, 0, launchIntent,
-                PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
-            )
-            session.commit(pendingIntent.intentSender)
-        } catch (e: Exception) {
-            session.abandon()
-            throw e
-        } finally {
-            session.close()
+        val uri = FileProvider.getUriForFile(this, "${packageName}.fileprovider", apkFile)
+        val intent = Intent(Intent.ACTION_VIEW).apply {
+            setDataAndType(uri, "application/vnd.android.package-archive")
+            addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_ACTIVITY_NEW_TASK)
         }
+        startActivity(intent)
     }
 
     private fun computeSha256(file: File): String {

packages/client-android/android/app/src/main/res/xml/file_paths.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths>
+    <cache-path name="apk" path="/" />
+</paths>