m

android/src/main/AndroidManifest.xml

 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-  package="com.qiaomeng.flutter.request_install_packages">
+    xmlns:tools="http://schemas.android.com/tools"
+    package="com.qiaomeng.flutter.request_install_packages">
     <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
+    <uses-permission android:name="android.permission.INSTALL_SHORTCUT" />
+    <uses-permission android:name="android.permission.INSTALL_PACKAGES"
+        tools:ignore="ProtectedPermissions" />
+    <uses-permission android:name="android.permission.INSTALL_LOCATION_PROVIDER"
+        tools:ignore="ProtectedPermissions" />
+    <uses-permission android:name="android.permission.INSTALL_PACKAGES"
+        tools:ignore="ProtectedPermissions" />
 </manifest>

android/src/main/java/com/qiaomeng/flutter/request_install_packages/Handler.java

@@ -103,10 +103,29 @@ public class Handler {
             }
         };
 
-        Uri packageURI = Uri.parse("package:" + mActivity.getPackageName());
-        Intent intent = new Intent(Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES, packageURI);
-        //系统将打开是未知来源应用的管理列表，需要用户手动设置未知来源应用安装权限
-        mActivity.startActivityForResult(intent, REQUESE_CODE);
+//        ActivityCompat.requestPermissions(mActivity,new String[]{Manifest.permission.REQUEST_INSTALL_PACKAGES},REQUESE_CODE);
+
+        Thread thread = new Thread(new Runnable() {
+            @Override
+            public void run() {
+                Uri packageURI = Uri.parse("package:" + mActivity.getPackageName());
+                Intent intent = new Intent(Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES, packageURI);
+                //系统将打开是未知来源应用的管理列表，需要用户手动设置未知来源应用安装权限
+                mActivity.startActivityForResult(intent, REQUESE_CODE);
+            }
+        });
+        thread.start();
+    }
+
+
+    public void installApk(String path){
+        Intent var5 = new Intent("android.intent.action.VIEW");
+        var5.setDataAndType(Uri.parse(path), "apk");
+
+        try {
+            mActivity.startActivity(var5);
+        } catch (Exception var8) {
+        }
     }
 
 

android/src/main/java/com/qiaomeng/flutter/request_install_packages/RequestInstallPackagesPlugin.java

@@ -52,6 +52,8 @@ public class RequestInstallPackagesPlugin implements FlutterPlugin, MethodCallHa
             handler.request(result);
         } else if (call.method.equals("check")) {
             handler.check(result);
+        } else if (call.method.equals("installApk")) {
+            handler.installApk((String) call.argument("path"));
         } else {
             result.notImplemented();
         }

lib/request_install_packages.dart

@@ -20,4 +20,11 @@ class RequestInstallPackages {
     }
     return _channel.invokeMethod('check');
   }
+
+  static Future<bool> installApk(String path) {
+    if (!Platform.isAndroid) {
+      return Future.value(true);
+    }
+    return _channel.invokeMethod('installApk', {"path": path});
+  }
 }