Question

我在drawable文件夹中有两个图像。我想以全屏显示它们，如果你滑动，那么下一张图像应该会出现。这是我正在使用的代码：

import com.ssb.crackssb.R;

    import java.util.ArrayList;


       import android.app.Activity;
       import android.content.Context;
       import android.graphics.Bitmap;
        import android.graphics.BitmapFactory;
          import android.support.v4.view.PagerAdapter;
      import android.support.v4.view.ViewPager;
   import android.view.LayoutInflater;
   import android.view.View;
    import android.view.ViewGroup;

      import android.widget.ImageView;
       import android.widget.RelativeLayout;

    public class FullScreenImageAdapter extends PagerAdapter {

private Activity _activity;
private  int[]  _imagePaths= {R.drawable.piq1,R.drawable.piq2};
private LayoutInflater inflater;

// constructor
public FullScreenImageAdapter(Activity activity,
        int[] imagePaths) {
    this._activity = activity;
    this._imagePaths = imagePaths;
}

@Override
public int getCount() {
    return this._imagePaths.length;
}

@Override
public boolean isViewFromObject(View view, Object object) {
    return view == ((RelativeLayout) object);
}

@Override
public Object instantiateItem(ViewGroup container, int position) {
    ImageView imgDisplay;


    inflater = (LayoutInflater) _activity
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View viewLayout = inflater.inflate(R.layout.piq, container,
            false);

    imgDisplay = (ImageView) viewLayout.findViewById(R.id.imageview);


    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inPreferredConfig = Bitmap.Config.ARGB_8888;
    Bitmap bitmap = BitmapFactory.decodeFile(_imagePaths(position), options);
    imgDisplay.setImageBitmap(bitmap);

    // close button click event


    ((ViewPager) container).addView(viewLayout);

    return viewLayout;
}

@Override
public void destroyItem(ViewGroup container, int position, Object object) {
    ((ViewPager) container).removeView((RelativeLayout) object);

}
}

这一行给出了错误：

Bitmap bitmap = BitmapFactory.decodeFile(_imagePaths(position), options);

错误是：

The method _imagePaths(int) is undefined for the type FullScreenImageAdapter

我想从drawable文件夹中将图像加载到我的位图中。请帮帮我。

Answer 1

您收到该错误的原因是因为您将_imagePaths视为方法而不是数组。 _imagePaths（position）应该是_imagePaths [position]。

你不需要乱用于创建位图。由于您在drawable目录中拥有资源，因此您只需将它们作为参考添加到ImageView：

替换

BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
Bitmap bitmap = BitmapFactory.decodeFile(_imagePaths(position), options);
imgDisplay.setImageBitmap(bitmap);

与

imgDisplay.setImageDrawable（getResources（）getDrawable（_imagePaths [位置]））;

Answer 2

没有必要让它如此复杂，只是简单地说：

viewLayout.setBackgroundResource(R.drawable.piq1);

修改

R.对象只是一堆整数，你引用它们并不重要。代码如下：

viewLayout.setBackgroundResource(_imagePaths[position]);

如何从可绘制文件夹中将图像路径转换为位图？

2 个答案: