如何在tomcat中使用maven在Spring MVC中集成apache solr(How to integrate apache solr in spring MVC using maven on tomcat)

 首先，声明这个asynctask类： 
 
class MyTask extends AsyncTask<String,Void,Bitmap>{

    @Override
    protected Bitmap doInBackground(String... strings) {
        String myString = Params[0];
        try {
            URL url = new URL(myString);
            Bitmap myBitmap = BitmapFactory.decodeStream(url.openConnection().getInputStream());
            return myBitmap;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
        return null;
    }

    @Override
    protected void onPostExecute(Bitmap bitmap) {
        super.onPostExecute(bitmap);
        imgDisplay.setImageBitmap(bitmap);
    }
}
 
 您的zoomActivity更改为： 
 
public class ZoomActivity  extends Activity {
ImageView imgDisplay;
@SuppressLint("NewApi")
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_zoom);

    Intent intent = getIntent();
    String url2 = intent.getStringExtra("image");



    Button btnClose;


    imgDisplay = (ImageView) findViewById(R.id.imgDisplay);
    btnClose = (Button) findViewById(R.id.btnClose);


    //call asynctask
    new MyTask().execute(url2);


    btnClose.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            ZoomActivity.this.finish();
        }
    });


}
 
 希望这有效 

First, declare this asynctask class:
 
class MyTask extends AsyncTask<String,Void,Bitmap>{

    @Override
    protected Bitmap doInBackground(String... strings) {
        String myString = Params[0];
        try {
            URL url = new URL(myString);
            Bitmap myBitmap = BitmapFactory.decodeStream(url.openConnection().getInputStream());
            return myBitmap;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
        return null;
    }

    @Override
    protected void onPostExecute(Bitmap bitmap) {
        super.onPostExecute(bitmap);
        imgDisplay.setImageBitmap(bitmap);
    }
}
 
Your zoomActivity changes to:
 
public class ZoomActivity  extends Activity {
ImageView imgDisplay;
@SuppressLint("NewApi")
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_zoom);

    Intent intent = getIntent();
    String url2 = intent.getStringExtra("image");



    Button btnClose;


    imgDisplay = (ImageView) findViewById(R.id.imgDisplay);
    btnClose = (Button) findViewById(R.id.btnClose);


    //call asynctask
    new MyTask().execute(url2);


    btnClose.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            ZoomActivity.this.finish();
        }
    });


}
 
hope this works