Question

您好我在Android应用程序中开发了一个xml解析器。这是在listview（产品列表）中成功解析xml。现在我已经实现了这个活动，意图是另一个活动。

list.setOnItemClickListener(new OnItemClickListener() {

@Override
public void onItemClick(AdapterView parent, View view,
int position, long id) {
String Name = ((TextView) view.findViewById(R.id.title)).getText().toString();
String Category = ((TextView) view.findViewById(R.id.artist)).getText().toString();
String Price = ((TextView) view.findViewById(R.id.duration)).getText().toString();
String Image=((ImageView)view.findViewById(R.id.list_image)).getImageMatrix().toString();

// Starting new intent
Intent in = new Intent(getApplicationContext(), SingleMenuItemActivity.class);
in.putExtra(KEY_TITLE, Name);
in.putExtra(KEY_ARTIST, Category);
in.putExtra(KEY_THUMB_URL, Image);
in.putExtra(KEY_DURATION, Price);
startActivity(in);

下一个活动目的是用户点击产品列表中的一个特定产品，下次活动必须显示特定产品详细信息。

nextactivity是SingleMenuLietItem.java源代码是

package com.example.truebranches;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Matrix;
import android.os.Bundle;
import android.widget.ImageView;
import android.widget.TextView;

public class SingleMenuItemActivity extends Activity {

// XML node keys
static final String KEY_TITLE = "Name";
static final String KEY_ARTIST = "Category";
static final String KEY_THUMB_URL = "Image";
static final String KEY_DURATION = "Price";

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.single_list_item);

// getting intent data
Intent in = getIntent();

// Get XML values from previous intent
String Name = in.getStringExtra(KEY_TITLE);
String ProductURL = in.getStringExtra(KEY_ARTIST);
String Image = in.getStringExtra(KEY_THUMB_URL);
String Price = in.getStringExtra(KEY_DURATION);


// Displaying all values on the screen
TextView lblName = (TextView) findViewById(R.id.name_label);
TextView lblProductURL = (TextView) findViewById(R.id.producturl_label);
ImageView lblImage = (ImageView) findViewById(R.id.image_label);
TextView lblCost = (TextView) findViewById(R.id.price_label);

lblName.setText(Name);
lblProductURL.setText(ProductURL);
lblImage.setImageResource(Image);
lblCost.setText(Price);

}
}

这里下一个活动必须显示textview产品详细信息..但是图像没有显示..因为我在这部分挣扎...所以我必须为图像更改哪一行将在下一个活动中显示。这里
lblImage.setImageResourse（Image）dis line有错误类型ImageView中的方法setImageResource（int）不适用于参数（String）...如何清除它。请帮我。

Answer 1

您只是设置图像就像设置列表项图像一样吗？

我认为它不会因此而起作用：

String Image=((ImageView)view.findViewById(R.id.list_image)).getImageMatrix().toString();

更新：使用此方法下载图像：

public void downloadImage(String url, String pictureName) {
        final HttpClient client = new DefaultHttpClient();
        final HttpGet getRequest = new HttpGet(url);

    String packageName = Environment.getExternalStorageDirectory() + "/"
      + getString(R.string.app_name); 

    folder = new File(packageName);
    folder.mkdirs();
    File f = new File(folder, pictureName);

    try {
        HttpResponse response = client.execute(getRequest);
        final int statusCode = response.getStatusLine().getStatusCode();
        if (statusCode != HttpStatus.SC_OK) {
            Log.w("ImageDownloader", "Error " + statusCode +
                    " while retrieving bitmap from " + url);

        }

        final HttpEntity entity = response.getEntity();
        if (entity != null) {
            InputStream inputStream = null;
            try {
                inputStream = entity.getContent();
                // Bug on slow connections, fixed in future release.
                Bitmap bm = BitmapFactory.decodeStream(new FlushedInputStream(inputStream));
                 try {
                     FileOutputStream out = new FileOutputStream(f.getAbsolutePath());
                     bm.compress(Bitmap.CompressFormat.PNG, 90, out);
                 } catch (Exception e) {
                        e.printStackTrace();
                 }
                 bm.recycle();
            } finally {
                if (inputStream != null) {
                    inputStream.close();
                }
                entity.consumeContent();
            }
        }
    } catch (IOException e) {
        getRequest.abort();
        Log.w("ImageDownload", "I/O error while retrieving bitmap from " + url, e);
    } catch (IllegalStateException e) {
        getRequest.abort();
        Log.w("ImageDownload", "Incorrect URL: " + url);
    } catch (Exception e) {
        getRequest.abort();
        Log.w("ImageDownload", "Error while retrieving bitmap from " + url, e);
    } finally {
    }
}

并在您的SingleMenuItemActivity中：

String  packageName = Environment.getExternalStorageDirectory() + "/"
            + getString(R.string.app_name);

folder = new File(packageName);
folder.mkdirs();
File f = new File(folder, pictureName);
Bitmap bitmap = null;
if (f.isFile())
    try {
        bitmap =  BitmapFactory.decodeStream(f.toURL().openStream());
    } catch (MalformedURLException e) {
         e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
if (bitmap != null)
    lblImage.setImageBitmap(bitmap);

Imageview xml解析器错误

1 个答案: