安卓日志猫的使用

 1 package com.lidaochen.phonecall;
 2 
 3 import android.content.Intent;
 4 import android.net.Uri;
 5 import android.support.v7.app.AppCompatActivity;
 6 import android.os.Bundle;
 7 import android.util.Log;
 8 import android.view.View;
 9 import android.widget.Button;
10 import android.widget.EditText;
11 import android.widget.TabHost;
12 import android.widget.ThemedSpinnerAdapter;
13 import android.widget.Toast;
14 
15 public class MainActivity extends AppCompatActivity{
16     public static final String tag = "MainActivity";
17     @Override
18     protected void onCreate(Bundle savedInstanceState) {
19         super.onCreate(savedInstanceState);
20         setContentView(R.layout.activity_main);
21         Log.d(tag, "我是debug级别");
22         Log.v(tag, "我是V级别");
23         Log.i(tag, "我是info级别");
24         Log.e(tag, "我是error级别");
25         Log.w(tag, "我是warn级别");
26         System.out.println("Hello World!");
27     }
28 }