显示图片问题
各位请帮忙看下,为什么显示一张res下面的一张图片,为什么下面红色语句一直提示错误!谢谢!是否需要在哪里添加什么东西!
import android.app.Activity;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
public class bitmap extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new Panel(this));
}
Bitmap bmp;
class Panel extends View{
public Panel(Context context) {
super(context);
Resources res = context.getResources();
bmp = BitmapFactory.decodeResource(res, R.drawable.popup_full_dark);
}
public void onDraw(Canvas canvas){
canvas.drawColor(Color.BLACK);
canvas.drawBitmap(bmp, 10, 10, null);
}
}
}
--------------------编程问答-------------------- 错误信息呢 --------------------编程问答-------------------- 把Bitmap bmp;设置为class Panel类的成员变量试试。
再不行就把
Resources res = context.getResources();
bmp = BitmapFactory.decodeResource(res, R.drawable.popup_full_dark);
放在ondDraw中
参考:
Android通过onDraw实现在View中绘图操作http://blog.csdn.net/ameyume/archive/2010/11/24/6031024.aspx --------------------编程问答-------------------- 谢谢楼上两位回复,问题不是出在Bitmap bmp而是R.drawable.popup_full_dark提示“popup_full_dark cannot be resolved or is not a field”.
--------------------编程问答-------------------- res下有这个图片吗? --------------------编程问答-------------------- popup_full_dark是资源号,你确定你有这个资源吗?或者说你的资源文件里有popup_full_dark吗?
补充:移动开发 , Android