Android Studio executed and nothing appears

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Android Studio executed and nothing appears

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Hi, I have Android Studio and it's giving me all kinds of problems, I could not do anything. I installed genymotion and made the arrangements to run the mobile application on my cell phone, but it does not work. In my cell phone opens the app but the button does not appear and in genymotion the app does not appear.

My computer only has 4 GB of RAM and is 32 bits.

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">

<TextView
    android:id="@+id/textView"
    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/button"
    android:layout_width="227dp"
    android:layout_height="wrap_content"
    android:layout_marginEnd="8dp"
    android:layout_marginLeft="8dp"
    android:layout_marginRight="8dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="168dp"
    android:text="Button"
    android:visibility="visible"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.503"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/editText" />

<EditText
    android:id="@+id/editText"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginEnd="8dp"
    android:layout_marginLeft="8dp"
    android:layout_marginRight="8dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="152dp"
    android:ems="10"
    android:inputType="textPersonName"
    android:text="Name"
    android:visibility="visible"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.503"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

And the MainActivity

package com.example.jhon.tutorialprogramarapps;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

     @Override
     protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        /*setContentView(R.layout.activity_main); */

        TextView mitexto = new TextView(this);
        mitexto.setText("Hola alumnos");
        setContentView(mitexto);

    }
}

android studio genymotion ejecutar

asked by Jhon Hernández 11.09.2018 в 02:32

source

2 answers

0

import android.app.Activity;
import android.os.Bundle;
public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    **setContentView(R.layout.activity_main);**
    this.btnGetRepos=(Button)findViewById(R.id.btn_get_repos);
}
}

add xml in res / layout / activity_main.xml

<LinearLayout
    android:id="@+id/linearLayout"
    android:layout_width="389dp"
    android:layout_height="488dp"
    android:orientation="vertical"
    tools:layout_editor_absoluteX="5dp"
    tools:layout_editor_absoluteY="3dp">
        <Button
        android:id="@+id/btn_get_repos"
        android:layout_below="@+id/et_github_user"
        android:text="Get Repo" />

</LinearLayout>

answered by 11.09.2018 в 17:13

Compare two values of a property of different json Cartesian product with random select mysql

score 0 · Accepted Answer

Change your MainActivity code to the following.

package com.example.jhon.tutorialprogramarapps;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main); 

         TextView mitexto = (TextView) findViewById(R.id.textView);
         mitexto.setText("Hola alumnos");

    }
}