All geek questions in one place

Button not working in Android application

I am new to Android and trying to implement a simple button that should display a message in Toast (it will eventually be used to create an account). But nothing happens when I press the button, no errors are displayed on the logarithm, so I have to miss something obvious, but I can not find it !!

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.laptop.whatsfordinner" > <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <!--Splash Screen --> <activity android:name=".Splash" android:label="@string/app_name" android:screenOrientation="portrait" android:theme="@android:style/Theme.Black.NoTitleBar" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".MainPage" android:label="@string/app_name" > </activity> <!--Register User --> <activity android:name=".RegistrationActivity" android:label="Register User"> </activity> </application> <!-- Internet Permissions --> <uses-permission android:name="android.permission.INTERNET" /> </manifest>

registration.xml

 <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:weightSum="1"> <!-- Name Label --> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/reg_title1" android:paddingLeft="10dip" android:paddingRight="10dip" android:paddingTop="10dip" android:textSize="17sp"/> <!-- Input Name --> <LinearLayout android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_weight="2.08"></LinearLayout> <EditText android:id="@+id/inputName" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_margin="5dip" android:layout_marginBottom="15dip" android:singleLine="true" android:background="#ffffff" /> <!-- Username Label --> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/reg_title2" android:paddingLeft="10dip" android:paddingRight="10dip" android:paddingTop="10dip" android:textSize="17sp"/> <!-- Input Username --> <EditText android:id="@+id/inputUsername" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_margin="5dip" android:layout_marginBottom="15dip" android:singleLine="true" android:background="#ffffff" /> <!-- Email Label --> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/reg_title3" android:paddingLeft="10dip" android:paddingRight="10dip" android:paddingTop="10dip" android:textSize="17sp"/> <!-- Input Email --> <EditText android:id="@+id/inputEmail" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_margin="5dip" android:layout_marginBottom="15dip" android:singleLine="true" android:inputType="textEmailAddress" android:background="#ffffff" /> <!-- Password Label --> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/reg_title4" android:paddingLeft="10dip" android:paddingRight="10dip" android:paddingTop="10dip" android:textSize="17sp"/> <!-- Input Password --> <EditText android:id="@+id/inputPassword" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_margin="5dip" android:layout_marginBottom="15dip" android:singleLine="true" android:inputType="textPassword" android:background="#ffffff" /> <!-- Button Register--> <Button android:id="@+id/btnRegister" android:layout_width="136dp" android:layout_height="37dp" android:text="@string/reg_button1" android:enabled="true" android:layout_gravity="center_horizontal" /> </LinearLayout>

RegistrationActivity.java

  package com.example.laptop.whatsfordinner; import android.app.Activity; import java.util.ArrayList; import java.util.List; import org.apache.http.NameValuePair; import org.apache.http.message.BasicNameValuePair; import org.json.JSONException; import org.json.JSONObject; import android.app.Activity; import android.app.ProgressDialog; import android.content.Intent; import android.os.AsyncTask; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class RegistrationActivity extends Activity { // Progress Dialog private ProgressDialog pDialog; JSONParser jsonParser = new JSONParser(); EditText inputName; EditText inputUsername; EditText inputEmail; EditText inputPassword; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.registration); // Create button Button btnRegister1 = (Button) findViewById(R.id.btnRegister); // button click event btnRegister1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { // creating new account in background thread Toast.makeText(RegistrationActivity.this, "Example action.", Toast.LENGTH_SHORT).show(); } }); }

Registration.java

 package com.example.laptop.whatsfordinner; import android.app.Activity; import android.support.v7.app.AppCompatActivity; import android.support.v7.app.ActionBar; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.os.Bundle; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.support.v4.widget.DrawerLayout; public class Registration extends Fragment { /** * The fragment argument representing the section number for this * fragment. */ private static final String ARG_SECTION_NUMBER = "section_number"; /** * Returns a new instance of this fragment for the given section * number. */ public static Registration newInstance(int sectionNumber) { Registration fragment = new Registration(); Bundle args = new Bundle(); args.putInt(ARG_SECTION_NUMBER, sectionNumber); fragment.setArguments(args); return fragment; } public Registration() { } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.registration, container, false); return rootView; } @Override public void onAttach(Activity activity) { super.onAttach(activity); ((MainPage) activity).onSectionAttached( getArguments().getInt(ARG_SECTION_NUMBER)); } @Override public void onDetach() { super.onDetach(); } }

What am I doing wrong?

+5
source share
1 answer

You inflate Layout in Fragment and in Activity .

If you want to handle this Button in your Fragment , do the following:

 @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.activity_main, container, false); Button regButton1 = (Button) rootView.findViewById(R.id.btnRegister); regButton1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Toast.makeText(getActivity(), "Example action", Toast.LENGTH_SHORT).show(); } }); return rootView; }

The code in your Activity looks good, but you fanned the same Layout for both.

Cm:

 setContentView(R.layout.registration);

AND

 View rootView = inflater.inflate(R.layout.registration, container, false);

Also, press CTRL + Alt + O to remove the unused import, in the end it should be like this (your Fragment import):

 import android.app.Activity; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.Button; import android.widget.Toast;

And, as I already guessed, the problem is that you uploaded Layout in Fragment and in Activity .and I tried this and worked with this Activity .

(good question, by the way).

Solution: Define your Layout for Fragment and Activity , but not the same Layout for both.

Then you are ready to go.

+3
source

Source: https://habr.com/ru/post/1242314/

More articles:


All Articles