Good morning everyone !!! So I'm new to programming for Android, I happen to have created 3 screens:
- Home
- Categories
- Attitude
The main one is just for it to go either in Categories or Exit.
The category he will choose in which of the categories of phrases he wants to see.
Attitude is one of the categories of phrases that will be available.
I can not open a virtual device inside Android Studio, so I can not log in while running, it's directly on my phone!
It opens from Main to the Category screen, but from Category to Attitude to work and closes the app
The main code below
package com.example.ensapp.ensfrases;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btn_Categorias = findViewById(R.id.btn_Categorias);
btn_Categorias.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
setContentView(R.layout.activity_main_categorias);
}
});
}
protected void finish (View view){
finish();
}
}
CategoryScreen
package com.example.ensapp.ensfrases;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class MainCategorias extends AppCompatActivity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_categorias);
}
public void Main(View v)
{
setContentView(R.layout.activity_tela_atitude);
}
}
Attitude Screen
package com.example.ensapp.ensfrases;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
public class telaAtitude extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tela_atitude);
}
public void mainCategoria(View v)
{
setContentView(R.layout.activity_main_categorias);
}
}
If someone can help me, because I have 2 days that I have this problem and I can not fix it ...
Thank you in advance!
Main Activity
<TextView
android:id="@+id/sample_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/btn_Categorias"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:onClick="mainCategorias"
android:text="Categorias"
app:layout_constraintBottom_toTopOf="@+id/sample_text"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.501"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.824" />
<Button
android:id="@+id/btn_Sair"
android:layout_width="107dp"
android:layout_height="wrap_content"
android:layout_marginLeft="136dp"
android:layout_marginStart="136dp"
android:onClick="finish"
android:text="Sair"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/sample_text"
app:layout_constraintVertical_bias="0.232" />
Activity Category
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:onClick="Main"
android:text="Button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.313" />
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:onClick="Main"
app:layout_constraintBottom_toTopOf="@+id/button"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.69"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.442" />
Activity Attitude
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:onClick="mainCategoria"
android:text="Button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.29" />
Android Manifest XML
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".MainCategorias" />
<activity android:name=".telaAtitude"></activity>
</application>