Log 打印当前代码行以及当前类

/**
 * Created by Afra55 on 2017/11/14.
 * Smile is the best name card.
 */
public class LogUtils {
	
    private static String getSimpleClassName(String name) {
        int lastIndex = name.lastIndexOf(".");
        return name.substring(lastIndex + 1);
    }
    
    
    public static void i(String msg) {
        StackTraceElement[] trace = Thread.currentThread().getStackTrace();
        
        int methodCount = 1;
        int stackOffset = getStackOffset(trace);
        
        if (methodCount + stackOffset > trace.length) {
            methodCount = trace.length - stackOffset - 1;
        }
        
        for (int i = methodCount; i > 0; i--) {
            int stackIndex = i + stackOffset;
            if (stackIndex >= trace.length) {
                continue;
            }
            StackTraceElement element = trace[stackIndex];
            
            StringBuilder builder = new StringBuilder();
            builder.append(getSimpleClassName(element.getClassName()))
                    .append(".")
                    .append(element.getMethodName())
                    .append(" ")
                    .append(" (")
                    .append(element.getFileName())
                    .append(":")
                    .append(element.getLineNumber())
                    .append(")")
                    .append(" | ")
                    .append(msg);
                    
            Log.i(getSimpleClassName(element.getClassName()), builder.toString());
            
        }
    }
    
    private static int getStackOffset(StackTraceElement[] trace) {
        for (int i = 2; i < trace.length; i++) {
            StackTraceElement e = trace[i];
            String name = e.getClassName();
            if (!name.equals(LogUtils.class.getName())) {
                return --i;
            }
        }
        return -1;
    }
}

public class MainActivity extends Activity {
	
	
  private void onJJ() {
    onBB();
  }
  private void onBB() {
    LogUtils.i("onBB");
  }
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    
    LogUtils.i("message");
    
    onJJ();
  }
}

I/MainActivity: MainActivity.onCreate  (MainActivity.java:32) | message
I/MainActivity: MainActivity.onBB  (MainActivity.java:25) | onBB