Android核心技术-day02-01-logcat

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "MainActivity";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Log.v(TAG,"我是 V 级别的 log 打印");
        Log.d(TAG,"我是 D 级别的 log 打印");
        Log.i(TAG,"我是 I 级别的 log 打印");
        Log.w(TAG,"我是 W 级别的 log 打印");
        Log.e(TAG,"我是 E 级别的 log 打印");
    }
}