Question

04-06 13:29:26.403 16654-17357/? E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1
                                                   Process: com.donateblood.blooddonation, PID: 16654
                                                   java.lang.RuntimeException: An error occured while executing doInBackground()
                                                       at android.os.AsyncTask$3.done(AsyncTask.java:300)
                                                       at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
                                                       at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
                                                       at java.util.concurrent.FutureTask.run(FutureTask.java:242)
                                                       at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
                                                       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
                                                       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
                                                       at java.lang.Thread.run(Thread.java:818)
                                                    Caused by: android.util.AndroidRuntimeException: Animators may only be run on Looper threads
                                                       at android.animation.ValueAnimator.start(ValueAnimator.java:946)
                                                       at android.animation.ValueAnimator.start(ValueAnimator.java:969)
                                                       at android.animation.ObjectAnimator.start(ObjectAnimator.java:829)
                                                       at android.animation.AnimatorSet.start(AnimatorSet.java:572)
                                                       at android.animation.StateListAnimator.start(StateListAnimator.java:156)
                                                       at android.animation.StateListAnimator.setState(StateListAnimator.java:149)
                                                       at android.view.View.drawableStateChanged(View.java:15994)
                                                       at android.widget.TextView.drawableStateChanged(TextView.java:3675)
                                                       at android.support.v7.widget.AppCompatButton.drawableStateChanged(AppCompatButton.java:143)
                                                       at android.view.View.refreshDrawableState(View.java:16023)
                                                       at android.view.View.setEnabled(View.java:6723)
                                                       at android.widget.TextView.setEnabled(TextView.java:1457)
                                                       at com.donateblood.blooddonation.SignupActivity.onSignupSuccess(SignupActivity.java:81)
                                                       at com.donateblood.blooddonation.SignupActivity.addUsertoDB(SignupActivity.java:183)
                                                       at com.donateblood.blooddonation.SignupActivity$dbAsync.doInBackground(SignupActivity.java:152)
                                                       at com.donateblood.blooddonation.SignupActivity$dbAsync.doInBackground(SignupActivity.java:137)
                                                       at android.os.AsyncTask$2.call(AsyncTask.java:288)

package com.donateblood.blooddonation;

/**
 * Created by YouCaf Iqbal on 4/5/2016.
 */
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.MongoClient;
import com.mongodb.MongoClientURI;

import butterknife.ButterKnife;
import butterknife.InjectView;
public class SignupActivity extends AppCompatActivity {
    private static final String TAG = "SignupActivity";
    DBCollection collection;
    DB db;
    @InjectView(R.id.input_name) EditText _nameText;
    @InjectView(R.id.input_email) EditText _emailText;
    @InjectView(R.id.input_password) EditText _passwordText;
    @InjectView(R.id.btn_signup) Button _signupButton;
    @InjectView(R.id.link_login) TextView _loginLink;
    @InjectView(R.id.input_location) TextView _locText;
    @InjectView(R.id.input_number) TextView _numText;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_signup);
        Spinner spinner =(Spinner) findViewById(R.id.spinner);
        String[] list = getResources().getStringArray(R.array.blood_type);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,R.layout.spinner_layout,R.id.txt,list);
        spinner.setAdapter(adapter);
        ButterKnife.inject(this);


        _signupButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                signup();
            }
        });

        _loginLink.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // Finish the registration screen and return to the Login activity
                finish();
            }
        });
    }

    public void signup() {
        Log.d(TAG, "Signup");

        if (validate()==false) {
            onSignupFailed();
            return;
        }

        _signupButton.setEnabled(false);
        dbAsync addtobd = new dbAsync();
        addtobd.execute();
    }

    public void onSignupSuccess() {

        _signupButton.setEnabled(true);
        setResult(RESULT_OK, null);
        finish();
    }

    public void onSignupFailed() {
        Toast.makeText(getBaseContext(), "Sign Up failed", Toast.LENGTH_LONG).show();

        _signupButton.setEnabled(true);
    }

    public boolean validate() {
        boolean valid = true;
        String name = _nameText.getText().toString();
        String email = _emailText.getText().toString();
        String password = _passwordText.getText().toString();
        String location = _locText.getText().toString();
        String number = _numText.getText().toString();

        if (name.isEmpty() || name.length() < 3) {
            _nameText.setError("at least 3 characters");
            valid = false;
        } else {
            _nameText.setError(null);
        }

        if (email.isEmpty() || !android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches()) {
            _emailText.setError("enter a valid email address");
            valid = false;
        } else {
            _emailText.setError(null);
        }

        if (password.isEmpty() || password.length() < 4 || password.length() > 10) {
            _passwordText.setError("between 4 and 10 alphanumeric characters");
            valid = false;
        } else {
            _passwordText.setError(null);
        }

        if (location.isEmpty()) {
            _locText.setError("Enter location");
            valid = false;
        } else {
            _locText.setError(null);
        }
        if (number.isEmpty()) {
            _numText.setError("Enter valid number");
            valid = false;
        } else {
            _numText.setError(null);
        }

        return valid;
    }

    public class dbAsync extends AsyncTask<Void,Void,Void> {

        private ProgressDialog pDialog;
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(SignupActivity.this);
            pDialog.setMessage("Creating Account");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(true);
            pDialog.show();
        }

        @Override
        protected Void doInBackground(Void... voids) {
            addUsertoDB();
            return null;
        }

        @Override
        protected void onPostExecute(Void aVoid) {
            super.onPostExecute(aVoid);
            pDialog.dismiss();
            Toast.makeText(getBaseContext(), "Created Successfully", Toast.LENGTH_SHORT).show();
        }

    }

    public void addUsertoDB(){
        MongoClientURI uri = new MongoClientURI("mongodb://yousaf:UC1941994@ds015730.mlab.com:15730/donateblood");
        MongoClient client = null;
        client = new MongoClient(uri);
        db = client.getDB(uri.getDatabase());
        String name = _nameText.getText().toString();
        String email = _emailText.getText().toString();
        String password = _passwordText.getText().toString();
        String location = _locText.getText().toString();
        String number = _numText.getText().toString();
        collection = db.getCollection("UserDetails");
        BasicDBObject document = new BasicDBObject();
        document.put("Name", name);
        document.put("email", email);
        document.put("password", password);
        document.put("location", location);
        document.put("number", number);
        collection.insert(document);
        onSignupSuccess();
    }
}

当我点击创建帐户时，进度条显示创建帐户，然后在某个时间“不幸的应用程序停止工作”消息到来并停止但值已成功添加到数据库。

Answer 1

尝试将onSignupSuccess()放入onPostExecute()

修改

您正在尝试在不是UIThread的线程中修改您的UI，这会导致您的错误，doInBackground()调用addUsertoDB()调用修改用户界面的onSignupSuccess();，在UIThread
中调用onSignupSuccess();

致命异常：插入远程MONGODB时AsyncTask＃1

1 个答案: