Android SDK 在程序中输出日志及查看日志

Log.i(MyAndroid.ACTIVITY_TAG, "Haha , this is a INFO of MyAndroid. ");

Log.w(MyAndroid.ACTIVITY_TAG, "Haha , this is a WARNING of MyAndroid. ");

return true;

}

}

}

package com.zijun;

import android.app.Activity;

import android.content.Context;

import android.graphics.Canvas;

import android.os.Bundle;

import android.util.Log;

import android.view.MotionEvent;

import android.view.View;

public class MyAndroid extends Activity {

protected static final String ACTIVITY_TAG="MyAndroid";

@Override

protected void onCreate(Bundle icicle) {

super.onCreate(icicle);

setContentView(new MyView(this));

}

public class MyView extends View {

public MyView(Context c) {

super(c);

}

@Override

protected void onDraw(Canvas canvas) {

}

@Override

public boolean onMotionEvent(MotionEvent event) {

Log.i(MyAndroid.ACTIVITY_TAG, "=============================");

Log.d(MyAndroid.ACTIVITY_TAG, "Haha , this is a DEBUG of MyAndroid. ");

Log.i(MyAndroid.ACTIVITY_TAG, "Haha , this is a INFO of MyAndroid. ");

Log.w(MyAndroid.ACTIVITY_TAG, "Haha , this is a WARNING of MyAndroid. ");

return true;

}

}

}

以上程序运行后, 在命令行执行 adb logcat -s MyAndroid:I

然后在手机模拟器的屏幕上 点击 拖动鼠标 就能看到相应的日志信息.