Question

我应该从互联网上获取图像并将其显示在我的活动上。为此我使用的是asynctask类。我忘了在我的清单文件中提及INTERNET权限，并且应用程序运行成功而没有给出任何异常并且能够获取模拟器上的所有图像。在设备上显示网络错误。我的问题是为什么模拟器表现得像这样。我正在使用genymotion模拟器（谷歌Nexus 4）

代码如下： -

 public class MainActivity extends ActionBarActivity implements View.OnClickListener {


Button btnClick = null;
Button btnClick2 = null;
Context context = MainActivity.this;
ImageView imageview =  null;
ProgressBar progressBar;

String URL = "http://images.visitcanberra.com.au/images/canberra_hero_image.jpg";
String URLTiger = "http://www.hdwallpapersimages.com/wp-content/uploads/2014/01/Winter-Tiger-Wild-Cat-Images.jpg";
String URLTree = "http://blog.jimdo.com/wp-content/uploads/2014/01/tree-247122.jpg";
String URLSky = "http://www.ucl.ac.uk/news/news-articles/1213/muscle-fibres-heart.jpg";
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    btnClick = (Button) findViewById(R.id.btnClick);
    btnClick2 = (Button)findViewById(R.id.btnClick2);
    imageview = (ImageView)findViewById(R.id.imageview);

    progressBar = (ProgressBar)findViewById(R.id.progressbar);

    progressBar.setVisibility(ProgressBar.GONE);

}




@Override
public void onClick(View v) {

    switch(v.getId())
    {
        case R.id.btnClick:
            new ImageDownloader(this).execute("http://stylonica.com /wp-content/uploads/2014/02/nature.jpg");
            new ImageDownloader(this).execute(URLTiger);
            new ImageDownloader(this).execute(URLTree);
            new ImageDownloader(this).execute(URLSky);
            break;
        case R.id.btnClick2:
            new Thread(new Runnable() {
                @Override
                public void run() {
                    btnClick2.post(new Runnable() {
                        @Override
                        public void run() {
                            btnClick2.setText("Thread B");
                        }
                    });

                }
            }).start();
            break;

    }
}
public class ImageDownloader extends AsyncTask<String,String,Bitmap> {

    ProgressDialog progressDialog;
    Context context;
    Bitmap bitmap;


    public ImageDownloader(Context context) {
        this.context = context;
    }

    @Override
    protected void onPreExecute() {
       // progressDialog = ProgressDialog.show(context,"Loading Image ","Please wait....");

       progressBar.setVisibility(ProgressBar.VISIBLE);
    }

    @Override
    protected Bitmap doInBackground(String... args) {
        try {
            Log.d("new URL(args[0]..............", new URL(args[0]) + "");
            bitmap = BitmapFactory.decodeStream((InputStream) new URL(args[0]).getContent());
        } catch (Exception e) {
            e.printStackTrace();
        }
        return bitmap;
    }

    @Override
    protected void onPostExecute(Bitmap image) {
        if(image != null){
            imageview.setImageBitmap(image);
          //  progressDialog.dismiss();
           progressBar.setVisibility(ProgressBar.INVISIBLE);
        }else{
           // progressDialog.dismiss();
           progressBar.setVisibility(ProgressBar.INVISIBLE);
            Toast.makeText(context, "Image Does Not exist or Network Error", Toast.LENGTH_SHORT).show();
        }
    }
}

}

我的清单文件中没有提到INTERNET权限。

Answer 1

免责声明：我致力于Genymotion。

答案是它是一个Genymotion错误。：（

Android API合规性对于Genymotion来说绝对至关重要请接受我们对你失去的时间的道歉。我们立即调查了这个bug并修复了它您将在我们的下一个版本中获得修复问题只发生在版本2.3.7,4.1.1和4.2.2。

BitmapFactory.decodeStream（）没有INTERNET PERMISSION

1 个答案: