boas comecei a programar em android e sempre que tento correr o meu projecto da-me sempre o mesmo erro
ajuda sff ?
1 - Programa
uma calculadora simples
1.1 - Java code
package com.sys.learn_01;
import android.os.Bundle;
import android.app.Activity;
import android.widget.*;
import android.view.*;
public class MainActivity extends Activity {
EditText num1, num2;
Button add, sub, mult, div;
TextView resultado;
double n1, n2, result;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
num1 = (EditText) findViewById(R.id.numero1);
num2 = (EditText) findViewById(R.id.numero2);
add = (Button) findViewById(R.id.add);
sub = (Button) findViewById(R.id.sub);
div = (Button) findViewById(R.id.div);
mult = (Button) findViewById(R.id.mult);
resultado = (TextView) findViewById(R.id.resultado);
add.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
n1 = Double.parseDouble(num1.getText().toString());
n2 = Double.parseDouble(num2.getText().toString());
result = n1 + n2;
resultado.setText(String.valueOf(result));
num1.setText("");
num2.setText("");
}
});
sub.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
n1 = Double.parseDouble(num1.getText().toString());
n2 = Double.parseDouble(num2.getText().toString());
result = n1 - n2;
resultado.setText(String.valueOf(result));
num1.setText("");
num2.setText("");
}
});
div.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
n1 = Double.parseDouble(num1.getText().toString());
n2 = Double.parseDouble(num2.getText().toString());
result = n1 / n2;
resultado.setText(String.valueOf(result));
num1.setText("");
num2.setText("");
}
});
mult.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
n1 = Double.parseDouble(num1.getText().toString());
n2 = Double.parseDouble(num2.getText().toString());
result = n1 * n2;
resultado.setText(String.valueOf(result));
num1.setText("");
num2.setText("");
}
});
}
}
1.2 - xml code
<RelativeLayout xmlns:android="http://schemas.andro...apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<EditText
android:id="@+id/numero1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:ems="10"
android:inputType="text"
android:text="@string/n1" />
<EditText
android:id="@+id/numero2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/numero1"
android:layout_below="@+id/numero1"
android:layout_marginTop="14dp"
android:ems="10"
android:inputType="text"
android:text="@string/n2" />
<Button
android:id="@+id/add"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/numero2"
android:layout_centerHorizontal="true"
android:layout_marginTop="16dp"
android:text="@string/add" />
<Button
android:id="@+id/sub"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/add"
android:layout_below="@+id/add"
android:text="@string/sub" />
<Button
android:id="@+id/div"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/sub"
android:layout_centerHorizontal="true"
android:text="@string/div" />
<Button
android:id="@+id/mult"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/div"
android:layout_centerHorizontal="true"
android:text="@string/mult" />
<TextView
android:id="@+id/resultado"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/mult"
android:layout_centerHorizontal="true"
android:layout_marginTop="15dp"
android:gravity="center"
android:text="@string/result"
android:textSize="30sp"
android:textStyle="bold" />
</RelativeLayout>
2 - versao do java
actualizada e de 64bits
3 - SO
windows 8.1
4 - programa
Android Developer Tools
Build: v22.2.1-833290
5 - ERRO
Consola :
[2013-11-03 01:05:37 - Android SDK] Warning when loading the SDK:
Warning: Ignoring platform 'android-19': build.prop is missing.
[2013-11-03 01:07:54 - Dex Loader] Unable to execute dex: java.nio.BufferOverflowException. Check the Eclipse log for stack trace.
[2013-11-03 01:07:54 - learn_calculadoraV1] Conversion to Dalvik format failed: Unable to execute dex: java.nio.BufferOverflowException. Check the Eclipse log for stack trace.
6 - uma simples questão
porque é que nao posso no xml na parte do text de um objecto meter algo sem ser usado como string ? eu a uns tempos metia e agora não deixa
Editado por sys, 03 November 2013 - 01:11.
