我得到這個error.Android錯誤,方法getText必須從UI線程調用,目前,傳染線程是工人。該怎麼辦?我嘗試了幾乎所有我找到的解決方案,但仍然無法正常工作。任何人都可以幫忙?試圖解決它,但沒有什麼幫助。現在我該怎麼做?在此先感謝Android錯誤,方法getText必須從UI線程調用,當前傳染線程是worker。該怎麼辦?
package net.simple.insertintomysql;
import android.os.AsyncTask;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends ActionBarActivity {
EditText editTextStoreName;
EditText editTextName;
EditText editTextFeedback;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
editTextStoreName = (EditText) findViewById(R.id.editTextstoreName);
editTextName = (EditText) findViewById(R.id.editTextName);
editTextFeedback = (EditText) findViewById(R.id.editTextFeedback);
}
public void insert(View view){
String storename = editTextStoreName.getText().toString();
String name = editTextName.getText().toString();
String feedback= editTextFeedback.getText().toString();
insertToDatabase(storename,name,feedback);
}
private void insertToDatabase(String storename, String name, String feedback){
class SendPostReqAsyncTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
final String paramStorename = params[0];
String paramName = params[1];
String paramFeedback = params[2];
//InputStream is = null;
runOnUiThread(new Runnable() {
@Override
public void run() {
final String storename = editTextStoreName.getText().toString();
final String name = editTextName.getText().toString();
final String feedback = editTextFeedback.getText().toString();
}
});
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("storename", storename));
nameValuePairs.add(new BasicNameValuePair("name", name));
nameValuePairs.add(new BasicNameValuePair("feedback", feedback));
try {
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(
"http://10.238.4.249/new/user_feedback.php");
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpClient.execute(httpPost);
HttpEntity entity = response.getEntity();
//is = entity.getContent();
} catch (ClientProtocolException e) {
} catch (IOException e) {
}
return "success";
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
Toast.makeText(getApplicationContext(), result, Toast.LENGTH_LONG).show();
TextView textViewResult = (TextView) findViewById(R.id.textViewResult);
textViewResult.setText("Inserted");
}
}
SendPostReqAsyncTask sendPostReqAsyncTask = new SendPostReqAsyncTask();
sendPostReqAsyncTask.execute(storename, name, feedback);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
查看在UI線程中運行了什麼'AsyncTask'方法 – pskink
是的。你已經定義了你的方法,比如'private void insertToDatabase(String storename,String name,String feedback){..'那你爲什麼要用'String storename = editTextStoreName.getText()。toString(); String name = editTextName.getText()。toString(); String feedback = editTextFeedback.getText()。toString();'。只需使用'private void insertToDatabase(editTextName.getText()。toString(),editTextName.getText()。toString(),editTextFeedback.getText()。toString()){' – Piyush
Android不允許訪問Ui組件後臺線程。然而,如果你閱讀'AsyncTask'文檔,你會發現它有3種特定的方法來處理Ui線程。 https://developer.android.com/reference/android/os/AsyncTask.html –