package com.example.testinvokewebservice; import android.os.AsyncTask; import android.widget.TextView; import com.model.ParamsModel; public class DownloadAsyncTask extends AsyncTask<ParamsModel, Integer, String>{ public TextView view; private int i=0; @Override protected String doInBackground(ParamsModel... params) { // TODO Auto-generated method stub i = params[0].getiStart(); for(int i1=0;i1<100;i1++) { i++; try { Thread.sleep(1000); publishProgress(i); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } return Integer.toString(i); } /* (non-Javadoc) * @see android.os.AsyncTask#onPreExecute() */ @Override protected void onPreExecute() { // TODO Auto-generated method stub view.setText("正准备执行后台操作"); } /* (non-Javadoc) * @see android.os.AsyncTask#onPostExecute(java.lang.Object) */ @Override protected void onPostExecute(String result) { // TODO Auto-generated method stub view.setText("执行后台操作完成,i的结果是:"+result); } /* (non-Javadoc) * @see android.os.AsyncTask#onProgressUpdate(java.lang.Object[]) */ @Override protected void onProgressUpdate(Integer... values) { // TODO Auto-generated method stub //如果直接是 view.setText(values[0]) 会出错呢。。 这个地方很奇怪 view.setText(values[0] + ""); } }
package com.example.testinvokewebservice; import com.model.ParamsModel; import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button btn= (Button)findViewById(R.id.btnLogin); btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub EditText editText = (EditText)findViewById(R.id.editText); String strValue = editText.getText().toString(); TextView view = (TextView)findViewById(R.id.textView); ParamsModel model = new ParamsModel(); model.setiStart(Integer.valueOf(strValue)); DownloadAsyncTask download = new DownloadAsyncTask(); download.view = view; download.execute(model); } }); } }
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.example.testinvokewebservice.MainActivity" > <EditText android:id="@+id/editText" android:layout_width="fill_parent" android:layout_height="wrap_content" android:hint="请输入初始数字:" /> <TextView android:id="@+id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <Button android:id="@+id/btnLogin" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_centerHorizontal="true" android:layout_marginTop="195dp" android:gravity="center_vertical" android:text="调用WebService" /> </RelativeLayout>