I am new to programming for android, I am developing an application in android studio in which I have to press buttons to enter numbers, like a calculator, my problem is to test the application on a phone in debug mode, when I opened the app is closed immediately by sending this message: Unfortunately "App" has Stopped, I'm using an LG-E425g (Android 4.1.2)
The Main_Activity
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/LytContenedor"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:weightSum="1">
<TextView android:id="@+id/LblNombre"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/ingrese"
android:textSize="25sp"
android:layout_weight="0.06"
android:layout_gravity="center_horizontal" />
<EditText
android:layout_width="345dp"
android:layout_height="wrap_content"
android:id="@+id/editText"
android:layout_gravity="center_horizontal"
android:inputType="text" />
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/RytContenedor"
android:layout_width="563dp"
android:layout_height="wrap_content"
android:orientation="vertical"
android:weightSum="1"
android:layout_gravity="left">
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="1"
android:id="@+id/button"
android:layout_alignParentTop="true"
android:layout_gravity="center"
android:height="75dp"
android:width="75dp"
android:paddingStart="10dp"
android:paddingEnd="10dp"
android:padding="10dp"
android:paddingLeft="10dp"
android:paddingTop="10dp"
android:paddingRight="10dp"
android:paddingBottom="10dp"
android:textSize="20sp" />
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="2"
android:id="@+id/button2"
android:layout_alignParentTop="true"
android:layout_toRightOf="@+id/button"
android:layout_toEndOf="@+id/button"
android:width="75dp"
android:elegantTextHeight="false"
android:height="75dp"
android:textSize="20sp" />
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="3"
android:id="@+id/button3"
android:layout_alignParentTop="true"
android:layout_toRightOf="@+id/button2"
android:layout_toEndOf="@+id/button2"
android:height="75dp"
android:width="75dp"
android:textSize="20sp" />
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="4"
android:id="@+id/button4"
android:layout_below="@+id/button"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:height="75dp"
android:width="75dp"
android:textSize="20sp" />
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="5"
android:id="@+id/button5"
android:width="75dp"
android:height="75dp"
android:layout_alignTop="@+id/button4"
android:layout_toLeftOf="@+id/button3"
android:layout_toStartOf="@+id/button3"
android:textSize="20sp" />
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="6"
android:id="@+id/button6"
android:height="75dp"
android:width="75dp"
android:layout_alignTop="@+id/button5"
android:layout_toRightOf="@+id/button5"
android:layout_toEndOf="@+id/button5"
android:textSize="20sp" />
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="7"
android:id="@+id/button7"
android:width="75dp"
android:height="75dp"
android:layout_below="@+id/button4"
android:layout_gravity="center_horizontal"
android:layout_toStartOf="@+id/button5"
android:layout_toLeftOf="@+id/button5"
android:textSize="20sp" />
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="8"
android:id="@+id/button8"
android:height="75dp"
android:width="75dp"
android:layout_alignTop="@+id/button7"
android:layout_toRightOf="@+id/button7"
android:layout_toEndOf="@+id/button7"
android:textSize="20sp" />
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="9"
android:id="@+id/button9"
android:layout_below="@+id/button5"
android:layout_toRightOf="@+id/button5"
android:layout_alignBottom="@+id/button8"
android:layout_alignRight="@+id/button6"
android:layout_alignEnd="@+id/button6"
android:textSize="20sp" />
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="0"
android:id="@+id/button10"
android:layout_above="@+id/button6"
android:layout_toRightOf="@+id/button3"
android:layout_toEndOf="@+id/button3"
android:textSize="20sp"
android:width="75dp"
android:height="75dp" />
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="K"
android:id="@+id/button11"
android:height="75dp"
android:layout_below="@+id/button10"
android:layout_alignLeft="@+id/button10"
android:layout_alignStart="@+id/button10"
android:width="75dp"
android:textSize="20sp" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Ingresar"
android:id="@+id/button12"
android:layout_toRightOf="@+id/button10"
android:layout_marginLeft="82dp"
android:layout_marginStart="82dp"
android:layout_above="@+id/button9"
android:width="120dp"
android:height="80dp"
android:textSize="20dp" />
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Borrar"
android:id="@+id/button13"
android:textSize="20dp"
android:width="75dp"
android:height="75dp"
android:layout_gravity="right"
android:layout_weight="0.06"
android:layout_alignParentTop="true"
android:layout_alignRight="@+id/button12"
android:layout_alignEnd="@+id/button12"
android:layout_alignLeft="@+id/button12"
android:layout_alignStart="@+id/button12" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="-"
android:id="@+id/button14"
android:height="75dp"
android:textSize="20dp"
android:width="75dp"
android:layout_below="@+id/button11"
android:layout_toRightOf="@+id/button9"
android:layout_alignRight="@+id/button11"
android:layout_alignEnd="@+id/button11" />
</RelativeLayout>
</LinearLayout>
## JAva Class:##
public class Ingreso extends ActionBarActivity {
private EditText Scr;
private ButtonClickListener btnClick;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_ingreso);
Scr =(EditText) findViewById(R.id.editText);
int idList[]={ R.id.button,R.id.button2,R.id.button3,R.id.button4,R.id.button5,R.id.button6,
R.id.button7,R.id.button8,R.id.button9,R.id.button10,R.id.button11,R.id.button14,R.id.button13};
for(int id:idList){
View v = (View) findViewById(id);
v.setOnClickListener(btnClick);
}
}
@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_ingreso, menu);
return true;
}
public void getKeyboard(String Str){
String ScrCurrent= Scr.getText().toString();
ScrCurrent +=Str;
Scr.setText(ScrCurrent);
}
private class ButtonClickListener implements View.OnClickListener{
public void onClick(View v){
switch (v.getId())
{
case R.id.button13:
Scr.setText("");
break;
default:
String numb =((Button) v).getText().toString();
getKeyboard(numb);
break;
}
}
}
@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);
}
}
