在我的
Android应用程序中,可绘制的文件夹中有许多图像.在我的布局中有两个按钮：“后退”和“下一个”按钮.点击下一个和后退按钮2个不同的图像被加载到相同的布局(所有图像共同).
问题：我可以在下一个/后退按钮的点击上加载图像,但是到达最后一个图像后,我想让我的下一个按钮禁用并且相同的后退按钮.由于用户在第一个图像上,后退按钮应该被禁用.代码如下：
public class SequencerActivity extends Activity implements OnClickListener
{
private int imageCounter = 0;
private ImageView imageLoader;
private int[] imageList = {R.drawable.image_wo_lbl_0,R.drawable.image_wo_lbl_1,R.drawable.image_wo_lbl_2,R.drawable.image_wo_lbl_3,R.drawable.image_wo_lbl_4,R.drawable.image_wo_lbl_5,R.drawable.image_wo_lbl_6,R.drawable.image_wo_lbl_8,R.drawable.image_wo_lbl_9,R.drawable.image_wo_lbl_10,R.drawable.image_wo_lbl_11};
@Override
public void onCreate(Bundle savedInstanceState)
{
setContentView(R.layout.parent_frame);//this one is the common parent layout for all image views
super.onCreate(savedInstanceState);
/*requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);*/
//int image1 = R.drawable.image_w_lbl_0;
imageLoader = (ImageView) findViewById(R.id.imageLoader);
//imageLoader.setImageResource(image1);
ImageButton next = (ImageButton) findViewById(R.id.next);
ImageButton back = (ImageButton) findViewById(R.id.back);
next.setOnClickListener(this);
back.setOnClickListener(this);
//show the default image
this.loadImage(imageList[imageCounter]);
}
@Override
public void onClick(View v)
{
int imagePath = 0;
// TODO Auto-generated method stub
switch (v.getId())
{
case R.id.next:
Log.i("Tag","tag");
if(imageCounter < imageList.length)
{
imageCounter++;
imagePath = imageList[imageCounter];
if (imageCounter==(imageList.length)-1)
{
//how to make my next button disable
}
}
break;
case R.id.back:
if(imageCounter > 0)
{
imageCounter--;
imagePath = imageList[imageCounter];
if (imageCounter==0)
{
//how to make my back button disable
}
}
break;
}
this.loadImage(imagePath);
}
private void loadImage(int imagePath)
{
imageLoader.setImageResource(imagePath);
}
}
解决方法
case R.id.next:
Log.i("Tag","tag");
if(imageCounter < imageList.length)
{
imageCounter++;
imagePath = imageList[imageCounter];
if (imageCounter==(imageList.length)-1)
{
ImageButton next=(ImageButton)findViewBYId(R.id.next);
next.setEnabled(false);
}
}
break;
case R.id.back:
if(imageCounter > 0)
{
imageCounter--;
imagePath = imageList[imageCounter];
if (imageCounter==0)
{
ImageButton back=(ImageButton)findViewBYId(r.id.back);
back.setEnabled(false);
}
}
break;
