我的xml文件就是这个，我想从一个类中设置programmaticaly。到目前为止，我有一些问题。
我的xml代码：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ffffff">
<Button
android:id="@+id/button_weather9"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Back" />
<ImageView
android:id="@+id/weather_icon"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="center_horizontal"
android:scaleType="fitXY"
android:src="@drawable/weather1" />
</LinearLayout>
到目前为止，这是我的java代码：
final LinearLayout test2 = new LinearLayout(this);
test2.setOrientation(LinearLayout.VERTICAL);
test2.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
final Button Back = new Button(this);
Back.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
Back.setText("Back");
test2.addView(Back);
final LoaderImageView image = new LoaderImageView(this, ImageUrl);
image.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
我不知道如何为java实现scaleType属性。
任何人都可以帮助我吗？我已经在2天前回复了它，但答案是不可接受的。我已经搜索过但我找不到答案。我已经尝试过这个但它不起作用：
image.ScaleType(FILL)
编辑：我的图像是一个Imageloader，它扩展了Image，因此必须为该方法定义image.ScaleTyoe。任何人都可以帮助我吗？
这是我的代码：
import java.io.IOException;
import java.net.MalformedURLException;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.os.Handler;
import android.os.Message;
import android.os.Handler.Callback;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
/**
* Free for anyone to use, just say thanks and share :-)
* @author Blundell
*
*/
public class LoaderImageView extends LinearLayout{
private static final int COMPLETE = 0;
private static final int FAILED = 1;
private Context mContext;
private Drawable mDrawable;
private ProgressBar mSpinner;
private ImageView mImage;
/**
* This is used when creating the view in XML
* To have an image load in XML use the tag 'image="http://developer.android.com/images/dialog_buttons.png"'
* Replacing the url with your desired image
* Once you have instantiated the XML view you can call
* setImageDrawable(url) to change the image
* @param context
* @param attrSet
*/
public LoaderImageView(final Context context, final AttributeSet attrSet) {
super(context, attrSet);
final String url = attrSet.getAttributeValue(null, "image");
if(url != null){
instantiate(context, url);
} else {
instantiate(context, null);
}
}
/**
* This is used when creating the view programatically
* Once you have instantiated the view you can call
* setImageDrawable(url) to change the image
* @param context the Activity context
* @param imageUrl the Image URL you wish to load
*/
public LoaderImageView(final Context context, final String imageUrl) {
super(context);
instantiate(context, imageUrl);
}
/**
* First time loading of the LoaderImageView
* Sets up the LayoutParams of the view, you can change these to
* get the required effects you want
*/
private void instantiate(final Context context, final String imageUrl) {
mContext = context;
mImage = new ImageView(mContext);
mImage.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
//mImage.setScaleType(ScaleType.FIT_XY);
mSpinner = new ProgressBar(mContext);
mSpinner.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
mSpinner.setIndeterminate(true);
addView(mSpinner);
addView(mImage);
if(imageUrl != null){
setImageDrawable(imageUrl);
}
}
/**
* Set's the view's drawable, this uses the internet to retrieve the image
* don't forget to add the correct permissions to your manifest
* @param imageUrl the url of the image you wish to load
*/
public void setImageDrawable(final String imageUrl) {
mDrawable = null;
mSpinner.setVisibility(View.VISIBLE);
mImage.setVisibility(View.GONE);
new Thread(){
public void run() {
try {
mDrawable = getDrawableFromUrl(imageUrl);
imageLoadedHandler.sendEmptyMessage(COMPLETE);
} catch (MalformedURLException e) {
imageLoadedHandler.sendEmptyMessage(FAILED);
} catch (IOException e) {
imageLoadedHandler.sendEmptyMessage(FAILED);
}
};
}.start();
}
/**
* Callback that is received once the image has been downloaded
*/
private final Handler imageLoadedHandler = new Handler(new Callback() {
public boolean handleMessage(Message msg) {
switch (msg.what) {
case COMPLETE:
mImage.setImageDrawable(mDrawable);
mImage.setVisibility(View.VISIBLE);
mSpinner.setVisibility(View.GONE);
break;
case FAILED:
default:
// Could change image here to a 'failed' image
// otherwise will just keep on spinning
break;
}
return true;
}
});
/**
* Pass in an image url to get a drawable object
* @return a drawable object
* @throws IOException
* @throws MalformedURLException
*/
private static Drawable getDrawableFromUrl(final String url) throws IOException, MalformedURLException {
return Drawable.createFromStream(((java.io.InputStream)new java.net.URL(url).getContent()), "name");
}
}
编辑：解决