apt-get
或yum
。对于Debian/Ubuntu系统,可以运行以下命令:,,``bash,sudo apt-get update,sudo apt-get install lua5.3,
`,,对于Red Hat/CentOS系统,可以使用:,,
`bash,sudo yum install lua,
``,,这些命令将自动下载并安装Lua及其相关依赖项。apt-get
或yum
。对于Debian/Ubuntu系统,可以运行以下命令:,,``bash,sudo apt-get update,sudo apt-get install lua5.3,
`,,对于Red Hat/CentOS系统,可以使用:,,
`bash,sudo yum install lua,
``,,这些命令将自动下载并安装Lua及其相关依赖项。RecyclerView.ItemAnimator
来为购物车列表项添加动画效果。通过自定义动画或者使用现成的库如ItemTouchHelper
,可以实现添加、删除和更新商品时的动画效果。netstat -tuln
,查看运行程序可用 ps aux
或 top
。java,import android.content.Context;,import android.graphics.Canvas;,import android.graphics.Color;,import android.graphics.Paint;,import android.util.AttributeSet;,import android.view.MotionEvent;,import android.view.View;,,public class SimpleDrawingView extends View {, private Paint paint = new Paint();, private float lastX, lastY;,, public SimpleDrawingView(Context context, AttributeSet attrs) {, super(context, attrs);, paint.setColor(Color.BLACK);, paint.setStrokeWidth(5f);, },, @Override, protected void onDraw(Canvas canvas) {, super.onDraw(canvas);, canvas.drawLine(lastX, lastY, lastX, lastY, paint);, },, @Override, public boolean onTouchEvent(MotionEvent event) {, float x = event.getX();, float y = event.getY();,, switch (event.getAction()) {, case MotionEvent.ACTION_DOWN:, lastX = x;, lastY = y;, break;, case MotionEvent.ACTION_MOVE:, invalidate(); // Redraw the view, lastX = x;, lastY = y;, break;, }, return true;, },},
``,,这个简单的画画板应用通过触摸事件来绘制线条。你可以将这个自定义视图添加到你的布局文件中,或者在Activity中动态添加。Powered By Z-BlogPHP 1.7.3