无法解析符号“标记”

Question

我是学习android Java的初学者。我从Youtube上学习java android教程，我完全遵循视频中的编码，但在android Studio上我的编码显示“无法解析符号‘标签’”。我可以知道是什么问题吗？并希望得到在座各位大师的讲解。

package com.NewApplicationLifeCycle;

import ...

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Log.i( tag: "State", msg: "onCreate" );
    }

    @Override
    protected void onStart() {
        super.onStart();
        Log.i( tag: "State", msg: "onStart" );
    }

    @Override
    protected void onResume() {
        super.onResume();
        Log.i( tag: "State", msg: "onResume" );
    }

    @Override
    protected void onPause() {
        super.onPause();
        Log.i( tag: "State", msg: "onPause" );
    }

    @Override
    protected void onStop() {
        super.onStop();
        Log.i( tag: "State", msg: "onStop" );
    }

    @Override
    protected void onRestart() {
        super.onRestart();
        Log.i( tag: "State", msg: "onRestart" );
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        Log.i( tag: "State", msg: "onDestroy" );
    }
}

Answer 1

像这样使用

var tag = "your tag name"
var msg = "you message"

Log.i( tag +"State", msg+ "onCreate" );

否则：-

Log.d(tag, message)

Log.i( "your tag name","your message" );

>

并检查此官方链接
如何使用Logcat编写和查看日志