我正在使用带有BaseSliderView.java的universalImageLoader.jar并卡住了。
我想设置从服务器下载的大图像的宽度。我有一个非常大的image，在用UIL.jar重新调整图像大小之后，宽度太小了。
如何调整适合所有屏幕尺寸的大图像宽度。
这是我的 BaseSlideView.java
package com.daimajia.slider.library.SliderTypes;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.ThumbnailUtils;
import android.os.Bundle;
import android.util.Log;
import android.view.Display;
import android.view.View;
import android.view.WindowManager;
import android.widget.ImageView;
import com.daimajia.slider.library.R;
import com.nostra13.universalimageloader.cache.disc.naming.Md5FileNameGenerator;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import com.nostra13.universalimageloader.core.assist.ImageScaleType;
import com.nostra13.universalimageloader.core.assist.ImageSize;
import com.nostra13.universalimageloader.core.assist.QueueProcessingType;
import com.nostra13.universalimageloader.core.display.FadeInBitmapDisplayer;
import com.nostra13.universalimageloader.core.listener.ImageLoadingProgressListener;
import com.nostra13.universalimageloader.core.listener.SimpleImageLoadingListener;
import java.io.File;
/**
* When you want to make your own slider view, you must extends from this class.
* BaseSliderView provides some useful methods. I provide two example:
* {@link com.daimajia.slider.library.SliderTypes.DefaultSliderView} and
* {@link com.daimajia.slider.library.SliderTypes.TextSliderView} if you want to
* show progressbar, you just need to set a progressbar id as @+id/loading_bar.
*/
public abstract class BaseSliderView {
protected Context mContext;
private Bundle mBundle;
/**
* Error place holder image.
*/
private int mErrorPlaceHolderRes;
/**
* Empty imageView placeholder.
*/
private int mEmptyPlaceHolderRes;
private String mUrl;
private File mFile;
private int mRes;
protected OnSliderClickListener mOnSliderClickListener;
private boolean mErrorDisappear;
private ImageLoadListener mLoadListener;
private String mDescription;
/**
* Scale type of the image.
*/
private ScaleType mScaleType = ScaleType.Fit;
/*
* Universal Image Loader Option
*/
DisplayImageOptions options;
public enum ScaleType {
CenterCrop, CenterInside, Fit, FitCenterCrop
}
protected BaseSliderView(Context context) {
mContext = context;
this.mBundle = new Bundle();
}
/**
* the placeholder image when loading image from url or file.
*
* @param resId
* Image resource id
* @return
*/
public BaseSliderView empty(int resId) {
mEmptyPlaceHolderRes = resId;
return this;
}
/**
* determine whether remove the image which failed to download or load from
* file
*
* @param disappear
* @return
*/
public BaseSliderView errorDisappear(boolean disappear) {
mErrorDisappear = disappear;
return this;
}
/**
* if you set errorDisappear false, this will set a error placeholder image.
*
* @param resId
* image resource id
* @return
*/
public BaseSliderView error(int resId) {
mErrorPlaceHolderRes = resId;
return this;
}
/**
* the description of a slider image.
*
* @param description
* @return
*/
public BaseSliderView description(String description) {
mDescription = description;
return this;
}
/**
* set a url as a image that preparing to load
*
* @param url
* @return
*/
public BaseSliderView image(String url) {
if (mFile != null || mRes != 0) {
throw new IllegalStateException("Call multi image function,"
+ "you only have permission to call it once");
}
mUrl = url;
return this;
}
/**
* set a file as a image that will to load
*
* @param file
* @return
*/
public BaseSliderView image(File file) {
if (mUrl != null || mRes != 0) {
throw new IllegalStateException("Call multi image function,"
+ "you only have permission to call it once");
}
mFile = file;
return this;
}
public BaseSliderView image(int res) {
if (mUrl != null || mFile != null) {
throw new IllegalStateException("Call multi image function,"
+ "you only have permission to call it once");
}
mRes = res;
return this;
}
public String getUrl() {
return mUrl;
}
public boolean isErrorDisappear() {
return mErrorDisappear;
}
public int getEmpty() {
return mEmptyPlaceHolderRes;
}
public int getError() {
return mErrorPlaceHolderRes;
}
public String getDescription() {
return mDescription;
}
public Context getContext() {
return mContext;
}
/**
* set a slider image click listener
*
* @param l
* @return
*/
public BaseSliderView setOnSliderClickListener(OnSliderClickListener l) {
mOnSliderClickListener = l;
return this;
}
/**
* When you want to implement your own slider view, please call this method
* in the end in `getView()` method
*
* @param v
* the whole view
* @param targetImageView
* where to place image
* @param context
*/
protected void bindEventAndShow(final View v, ImageView targetImageView) {
final BaseSliderView me = this;
v.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mOnSliderClickListener != null) {
mOnSliderClickListener.onSliderClick(me);
}
}
});
mLoadListener.onStart(me);
/*
* set option values
*/
options = new DisplayImageOptions.Builder()
.cacheInMemory(true)
.cacheOnDisk(true)
.imageScaleType(ImageScaleType.EXACTLY)
.considerExifParams(true)
.displayer(new FadeInBitmapDisplayer(300, true, true, true))
.delayBeforeLoading(50)
.resetViewBeforeLoading(true)
.bitmapConfig(Bitmap.Config.RGB_565).build();
if (!ImageLoader.getInstance().isInited()) {
initImageLoader(mContext);
}
showImage(v, getUrl(), targetImageView);
}
public BaseSliderView setScaleType(ScaleType type) {
mScaleType = type;
return this;
}
public ScaleType getScaleType() {
return mScaleType;
}
/**
* the extended class have to implement getView(), which is called by the
* adapter, every extended class response to render their own view.
*
* @return
*/
public abstract View getView();
/**
* set a listener to get a message , if load error.
*
* @param l
*/
public void setOnImageLoadListener(ImageLoadListener l) {
mLoadListener = l;
}
public interface OnSliderClickListener {
public void onSliderClick(BaseSliderView slider);
}
/**
* when you have some extra information, please put it in this bundle.
*
* @return
*/
public Bundle getBundle() {
return mBundle;
}
public interface ImageLoadListener {
public void onStart(BaseSliderView target);
public void onEnd(boolean result, BaseSliderView target);
}
public static void initImageLoader(Context context) {
ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(
context).threadPriority(Thread.NORM_PRIORITY + 2)
.denyCacheImageMultipleSizesInMemory()
.diskCacheFileNameGenerator(new Md5FileNameGenerator())
.diskCacheSize(50 * 1024 * 1024)
// 50 Mb
//.diskCacheExtraOptions(150, 150, null);
.tasksProcessingOrder(QueueProcessingType.LIFO)
.writeDebugLogs() // Remove for release app
.build();
ImageLoader.getInstance().init(config);
}
ImageSize imageSize = new ImageSize(500, 200);
public int getWidthOfScreen() {
WindowManager wm = (WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE);
Display display = wm.getDefaultDisplay();
return display.getWidth();
}
private void showImage(final View v, String imageURL, final ImageView imageView) {
ImageLoader.getInstance().displayImage(imageURL, imageView, options, new SimpleImageLoadingListener() {
@Override
public void onLoadingStarted(String imageUri, View view) {
}
@Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
int width = loadedImage.getWidth();
Log.e("", "MY WIDTH IS ===" + width);
int height = loadedImage.getHeight();
imageView.setImageBitmap(loadedImage);
if (v.findViewById(R.id.loading_bar) != null) {
v.findViewById(R.id.loading_bar).setVisibility(
View.INVISIBLE);
}
}
}, new ImageLoadingProgressListener() {
@Override
public void onProgressUpdate(String imageUri, View view,
int current, int total) {
}
});
}
}
提前致谢。
答案 0 :(得分：0)
我没有设置解码的位图大小。
但DisplayOptions.imagePreProcessor或（不记得在哪里）是一个图像转换器。