小编Kum*_*mar的帖子

收件人正在接收电子邮件,但没有附件.这是代码,任何专家都知道我哪里出错了？

 Intent messageIntent = new Intent(android.content.Intent.ACTION_SEND);

String aEmailList[] = { "mymailgmail.com" };
messageIntent.putExtra(android.content.Intent.EXTRA_EMAIL, aEmailList);

messageIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, subject);
...    
messageIntent.setType("image/jpeg");
File downloadedPic = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), "MyApp.jpg");

messageIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(downloadedPic));

startActivity(Intent.createChooser(messageIntent, getResources().getString(R.string.chooser_pic)));

我明白了:

file://附件路径必须指向file:// sdcard.忽略附件文件://...file名称是MyApp.jpg

我没有得到图像,只是在短信之上.谢谢.

我正在从URL下载图像,但下载完成后图像不会更改.我在下面输入代码,有没有人经历过同样的事情？

Java 文件

public class MyImgActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    ImageView imgView =(ImageView)findViewById(R.id.imageView1);
    Drawable drawable = LoadImageFromWebOperations("http://www.gophoto.it/view.php?i=http://1.bp.blogspot.com/-2LTvCCufBKc/T3L3KgcTj2I/AAAAAAAABbQ/Ki60e1LU9sE/s1600/Sachin%2BTendulkar.png");

    imgView.setImageDrawable(drawable);
 }
private Drawable LoadImageFromWebOperations(String url) {
    try
      {
       InputStream is = (InputStream) new URL(url).getContent();
       Drawable d = Drawable.createFromStream(is, "src name");
       return d;
      }catch (Exception e) {
       System.out.println("Exc="+e);
       return null;
      }
}
}

XML 文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<ImageView 
    android:id="@+id/imageView1"
    android:layout_height="match_parent" …

我想创建一个图片库,从网址获取图片..这是我的代码但不工作...

 public class ImagesActivity extends Activity
 {    

private String[] imageIDs= {"http://lh5.ggpht.com/_mrb7w4gF8Ds/TCpetKSqM1I/AAAAAAAAD2c/Qef6Gsqf12Y/s144-c/_DSC4374%20copy.jpg",  
"http://lh5.ggpht.com/_Z6tbBnE-swM/TB0CryLkiLI/AAAAAAAAVSo/n6B78hsDUz4/s144-c/_DSC3454.jpg",  
"http://lh3.ggpht.com/_GEnSvSHk4iE/TDSfmyCfn0I/AAAAAAAAF8Y/cqmhEoxbwys/s144-c/_MG_3675.jpg",  
"http://lh6.ggpht.com/_Nsxc889y6hY/TBp7jfx-cgI/AAAAAAAAHAg/Rr7jX44r2Gc/s144-c/IMGP9775a.jpg"
};

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

    Gallery gallery = (Gallery) findViewById(R.id.gallery1);

    gallery.setAdapter(new ImageAdapter(this));        
    gallery.setOnItemClickListener(new OnItemClickListener() 
    {
        public void onItemClick(AdapterView parent, View v, int position, long id) 
        {                
 //                             Toast.makeText(getBaseContext(), "pic" + (position + 1) + " selected", Toast.LENGTH_SHORT).show();
                          //---display the images selected---
                            ImageView imageView = (ImageView) findViewById(R.id.image1);                
                            imageView.setImageResource(imageIDs[position]);
        }
    });

}


public class ImageAdapter extends BaseAdapter 
{
    private Context context;
    private int itemBackground; …