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다음은 CoverFlow에 사용한 활동 및 이미지 어댑터입니다. 하지만이 커버 플로우로 SD 카드 디렉토리에 저장 한 모든 이미지를로드하려고합니다. 어떻게해야합니까? All이라는 SD 카드 디렉토리에 이미지를 저장했습니다. 해당 폴더에서 이미지를로드하고 싶습니다. 어떤 도움을 주셔서 감사합니다.커버 플로우 용 이미지 어댑터
public class CoverFlowExample extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
CoverFlow coverFlow;
coverFlow = new CoverFlow(this);
coverFlow.setAdapter(new ImageAdapter(this));
ImageAdapter coverImageAdapter = new ImageAdapter(this);
coverImageAdapter.createReflectedImages();
coverFlow.setAdapter(coverImageAdapter);
coverFlow.setSpacing(-15);
coverFlow.setSelection(8, true);
setContentView(coverFlow);
//Use this if you want to use XML layout file
//setContentView(R.layout.main);
//coverFlow = (CoverFlow) findViewById(R.id.coverflow);
}
public class ImageAdapter extends BaseAdapter {
int mGalleryItemBackground;
private Context mContext;
private FileInputStream fis;
private Integer[] mImageIds = {
R.drawable.top,
R.drawable.bottom,
R.drawable.top,
R.drawable.bottom,
R.drawable.top,
R.drawable.bottom,
R.drawable.top,
R.drawable.bottom,
R.drawable.top
};
private ImageView[] mImages;
public ImageAdapter(Context c) {
mContext = c;
mImages = new ImageView[mImageIds.length];
}
public boolean createReflectedImages() {
//The gap we want between the reflection and the original image
final int reflectionGap = 7;
int index = 0;
for (int imageId : mImageIds) {
Bitmap originalImage = BitmapFactory.decodeResource(getResources(),
imageId);
int width = originalImage.getWidth();
int height = originalImage.getHeight();
//This will not scale but will flip on the Y axis
Matrix matrix = new Matrix();
matrix.preScale(1, -1);
//Create a Bitmap with the flip matrix applied to it.
//We only want the bottom half of the image
Bitmap reflectionImage = Bitmap.createBitmap(originalImage, 0, height/2, width, height/2, matrix, false);
//Create a new bitmap with same width but taller to fit reflection
Bitmap bitmapWithReflection = Bitmap.createBitmap(width
, (height + height/2), Config.ARGB_8888);
//Create a new Canvas with the bitmap that's big enough for
//the image plus gap plus reflection
Canvas canvas = new Canvas(bitmapWithReflection);
//Draw in the original image
canvas.drawBitmap(originalImage, 0, 0, null);
//Draw in the gap
Paint deafaultPaint = new Paint();
canvas.drawRect(0, height, width, height + reflectionGap, deafaultPaint);
//Draw in the reflection
canvas.drawBitmap(reflectionImage,0, height + reflectionGap, null);
//Create a shader that is a linear gradient that covers the reflection
Paint paint = new Paint();
LinearGradient shader = new LinearGradient(0, originalImage.getHeight(), 0,
bitmapWithReflection.getHeight() + reflectionGap, 0x70ffffff, 0x00ffffff,
TileMode.CLAMP);
//Set the paint to use this shader (linear gradient)
paint.setShader(shader);
//Set the Transfer mode to be porter duff and destination in
paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
//Draw a rectangle using the paint with our linear gradient
canvas.drawRect(0, height, width,
bitmapWithReflection.getHeight() + reflectionGap, paint);
ImageView imageView = new ImageView(mContext);
imageView.setImageBitmap(bitmapWithReflection);
imageView.setLayoutParams(new CoverFlow.LayoutParams(120, 180));
imageView.setScaleType(ScaleType.MATRIX);
mImages[index++] = imageView;
}
return true;
}
public int getCount() {
return mImageIds.length;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
//Use this code if you want to load from resources
// ImageView i = new ImageView(mContext);
//i.setImageResource(mImageIds[position]);
//i.setLayoutParams(new CoverFlow.LayoutParams(130, 130));
//i.setScaleType(ImageView.ScaleType.MATRIX);
//return i;
return mImages[position];
}
/** Returns the size (0.0f to 1.0f) of the views
* depending on the 'offset' to the center. */
public float getScale(boolean focused, int offset) {
/* Formula: 1/(2^offset) */
return Math.max(0, 1.0f/(float)Math.pow(2, Math.abs(offset)));
}
}
}
고마워요. 늦게 응답해서 죄송합니다. 하지만 언급 한 코드는 어디에 지정해야합니까? –
'onCreate()'는 좋은 장소입니다. 이렇게하면 활동이 시작될 때 이미지가로드되도록 할 수 있습니다. 액티비티 라이프 사이클에 대해 더 자세히 알고 싶다면 여기를 살펴보십시오. [link] (http://developer.android.com/reference/android/app/Activity.html#ActivityLifecycle) – Thomas