相关疑难解决方法(0)

例如:

javac Foo.java
Note: Foo.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

我有一个build.gradle与文件dependencies { classpath 'com.android.tools.build:gradle:0.13.3'}和apply plugin: 'com.android.application'.

当我进行调试构建时,我得到:

gradle clean assembleDebug
:myapp:preBuild
(...)
:myapp:compileDebugJava
Note: C:\path\to\MyClass.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

:myapp:preDexDebug
(...)
:myapp:assembleDebug

BUILD SUCCESSFUL

如何添加-Xlint:unchecked底层任务？关于Java编译选项的Gradle Plugin用户指南是无用的.

我试图运行我的 Flutter 应用程序，结果如下：

    Compiler message:
lib/main.dart:1:8: Error: Not found: 'dart:html'
import 'dart:html';
       ^
Invalid depfile: C:\Users\IMBA\AndroidStudioProjects\mi_card_flutter-master\.dart_tool\flutter_build\410385fb4867e1d74565d68665ecb577\kernel_snapshot.d
Invalid depfile: C:\Users\IMBA\AndroidStudioProjects\mi_card_flutter-master\.dart_tool\flutter_build\410385fb4867e1d74565d68665ecb577\kernel_snapshot.d
...
Compiler message:
lib/main.dart:1:8: Error: Not found: 'dart:html'
import 'dart:html';
       ^
Unhandled exception:
FileSystemException(uri=org-dartlang-untranslatable-uri:dart%3Ahtml; message=StandardFileSystem only supports file:* and data:* URIs)
#0      StandardFileSystem.entityForUri (package:front_end/src/api_prototype/standard_file_system.dart:33:7)
#1      asFileUri (package:vm/kernel_front_end.dart:567:37)
#2      writeDepfile (package:vm/kernel_front_end.dart:760:21)
<asynchronous suspension>
#3      FrontendCompiler.compile (package:frontend_server/frontend_server.dart:536:15)
<asynchronous suspension>
#4      _FlutterFrontendCompiler.compile (package:flutter_frontend_server/server.dart:40:22)
#5      starter (package:flutter_frontend_server/server.dart:178:27)
#6      main (file:///C:/b/s/w/ir/cache/builder/src/flutter/flutter_frontend_server/bin/starter.dart:8:30)
#7      _startIsolate.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:299:32)
#8      _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:168:12)

Target kernel_snapshot failed: Exception: Errors during snapshot creation: …

注意：--:-----.java 使用或覆盖已弃用的 API。

注意：使用 -Xlint:deprecation 重新编译以获取详细信息。

大家好，我刚开始制作一个应用程序，并且显示该错误“”使用或覆盖了已弃用的 API。注意：使用 -Xlint:deprecation 重新编译以获取详细信息。"" 这是什么意思以及如何使用 -Xlint 重新编译

我的代码

        import androidx.appcompat.app.AppCompatActivity;
        import android.content.Intent;
        import android.os.Bundle;
        import android.os.Handler;
        public class StartActivity extends AppCompatActivity {
        private static int timeOut = 1800;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_start);
        final Handler handler = new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                Intent i = new Intent(StartActivity.this, MainActivity.class);
                startActivity(i);
                finish();

            }
        }, timeOut);
    }
}