Android开发之日志记录（六）

野性酷女 2024-03-26 20:32 18阅读 0赞

**日志级别：error > warn > information > debug > verbose**

**日志类型**

//Log.e（）：error级别
                    Log.e("LogActivity","我是错误日志");
    
                    //Log.w（）：warn级别
                    Log.w("LogActivity","我是警告日志");
    
                    //Log.i（）：information级别
                    Log.i("LogActivity","我是信息日志");
    
                    //Log.d（）：debug级别
                    Log.d("LogActivity","我是调试日志");
    
                    //Log.v（）：verbose级别
                    Log.v("LogActivity","我是冗余日志");

查看日志：控制台下导航栏**Logcat**

![1a11da9aa99b4f1ea736492c6d89adb5.png][]

**\[例子\]**

**log\_activity.xml**

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
    
        <EditText
            android:id="@+id/l_user"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="请输入用户名" />
    
        <EditText
            android:id="@+id/l_pwd"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="请输入密码" />
    
        <Button
            android:id="@+id/l_btn"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="登录" />
    </LinearLayout>

**LogActivity.java**

import androidx.appcompat.app.AppCompatActivity;
    import android.os.Bundle;
    import android.util.Log;
    import android.view.View;
    import android.widget.Button;
    import android.widget.EditText;
    
    public class LogActivity extends AppCompatActivity {
    
        //定义变量
        EditText lUser;
        EditText lPwd;
        Button lBtn;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_log);
    
            //初始化变量
            lUser=findViewById(R.id.l_user);
            lPwd=findViewById(R.id.l_pwd);
            lBtn=findViewById(R.id.l_btn);
    
            //监听按钮点击事件
            lBtn.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    //获取信息
                    String user =lUser.getText().toString().trim();
                    String passwd =lPwd.getText().toString().trim();
    
                    try {
                        int a=2/0;
                    }catch (Exception e){
                        //Log.e（）：error级别
                        Log.e("LogActivity",e.toString());
                    }
                }
            });
        }
    }

[1a11da9aa99b4f1ea736492c6d89adb5.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/25/a51057e439d6428c84803b2e82c7157f.png