Question

我使用AsyncTask在textViews，图像，其他视图中使用soap对象填充数据。但当我将Orientation改为横向时，AsyncTask重复这个过程并再次显示Facebook闪烁。在获取数据时如何停止AsynkTask？

主要活动：

public class MainActivity extends AppCompatActivity  {
TextView helloTxt;
RelativeLayout rel;
boolean done = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    helloTxt = (TextView)findViewById(R.id.helloTxt);
    rel = (RelativeLayout) findViewById(R.id.rel);
    // call the inner Class from here

    new callSoapObject().execute();

}

这是AsyncTask内部类：

private class callSoapObject extends AsyncTask<String,Object,String>{
    private final String NameSpace = "https://tempuri.org/";
    private final String URL = "https://192.168.0.102/Service.svc/soap";
    final String Method_Name = "DoWork";
    final String SOAP_ACTION = "https://tempuri.org/IService/DoWork";
    public int TimeOut = 5000;
    String response;
    ShimmerFrameLayout container;

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        //Start Progress bar or placeHolder
        container = (ShimmerFrameLayout) findViewById(R.id.shimmer_view_container);
        container.startShimmerAnimation();
    }


    @Override
    protected String doInBackground(String... params) {

        // create SoapObj
        SoapObject request = new SoapObject(NameSpace, Method_Name);

        SoapSerializationEnvelope Envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
        Envelope.dotNet = true;
        Envelope.setOutputSoapObject(request);
        HttpTransportSE transportSE = new HttpTransportSE(URL, TimeOut);
        try {
            transportSE.call(SOAP_ACTION, Envelope);
            response = (String) Envelope.getResponse();
        } catch (Exception e) {
            e.printStackTrace();
            Log.e("Error", e.toString());
        }
        return response;
    }
    @Override
    protected void onPostExecute(String result) {
        super.onPostExecute(result);
        // stop progressBar
        container.stopShimmerAnimation();
        if (result != null) {
            helloTxt.setText(result);
        } else {
            Toast.makeText(MainActivity.this, "Something went wrong", Toast.LENGTH_LONG).show();
            rel.setBackgroundResource(0);
            rel.setMinimumWidth(helloTxt.getWidth());
        }
    }
}
}

Answer 1

在我看来，当您更改方向时，您不希望使用不同的布局和资源，可以通过在AndroidManifest文件中添加以下配置来避免销毁和重新创建活动，从而防止出现此问题：

<activity
    android:name=".MainActivity"
    android:configChanges="orientation|screenSize|keyboardHidden"/>

Here您可以找到处理方向更改的其他解决方案。

Answer 2

如果您尝试使用后台任务处理方向更改，那么我认为您可以使用AsyncTaskLoader而不是AsyncTask。 AsyncTaskLoader将为您处理方向更改。

Here你可以找到AsyncTask和AsyncTaskLoader之间的区别！

Here你可以找到AsyncTaskLoader Tutorial

Here是AsyncTaskLoader

的官方文档

完成绑定数据时，重复AsyncTask重复

2 个答案: