La mia prima input/output app va in crash e non capisco perchè!!

[franchino87]

ciao a tutti!

sono nuovo nel mondo della programmazione android ed ho provato a seguire qualche tutorial per creare un'applicazione di prova per iniziare dalle basi!!

ho creato una semplice app nella quale inserisci nome e cognome e ti restituisce in una nuova activity i valori inseriti, il problema è che quando premo il tasto invia l'app va in crash e non riesco a capirne il motivo!

vi posto il codice, magari potete aiutarmi!

src/MainActivity.java

package com.example.helloapi8;<br /> <br /> import java.text.Normalizer.Form;<br /> <br /> import android.app.Activity;<br /> import android.content.Intent;<br /> import android.os.Bundle;<br /> import android.view.View;<br /> import android.view.View.OnClickListener;<br /> import android.widget.Button;<br /> import android.widget.EditText;<br /> <br /> public class MainActivity extends Activity implements OnClickListener{<br /> <br /> @Override<br /> public void onCreate(Bundle savedInstanceState) {<br /> super.onCreate(savedInstanceState);<br /> setContentView(R.layout.activity_main);<br /> final Button button = (Button) findViewById(R.id.form_button);<br /> button.setOnClickListener(this);<br /> }<br /> <br /> public void onClick(View v) {<br /> //recuperiamo i dati dalla form<br /> final EditText edit_name = (EditText)findViewById(R.id.edit_name);<br /> final EditText edit_lastname = (EditText)findViewById(R.id.edit_lastname);<br /> //creiamo un oggetto bundle ovvero un associazione nome-dati<br /> Bundle bundle = new Bundle();<br /> //mettiamo i dati recuperati nell'oggetto bundle<br /> bundle.putString("name", edit_name.getText().toString());<br /> bundle.putString("lastname", edit_lastname.getText().toString());<br /> //creiamo l'intento per la chiamata dell'activity Form.class<br /> Intent intent = new Intent(this, Form.class);<br /> //associamo all'intento il bundle<br /> intent.putExtras(bundle);<br /> //lanciamo l'activity<br /> startActivity(intent);<br /> }<br /> }<br />

res/layout/activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"<br /> xmlns:tools="http://schemas.android.com/tools"<br /> android:layout_width="match_parent"<br /> android:layout_height="match_parent" ><br /> <br /> <TextView<br /> android:id="@+id/lbltop"<br /> android:layout_width="wrap_content"<br /> android:layout_height="wrap_content"<br /> android:layout_alignParentTop="true"<br /> android:layout_centerHorizontal="true"<br /> android:layout_marginTop="16dp"<br /> android:text="@string/lbltop" /><br /> <br /> <TextView<br /> android:id="@+id/lblnome"<br /> android:layout_width="wrap_content"<br /> android:layout_height="wrap_content"<br /> android:layout_marginTop="42dp"<br /> android:text="@string/lblnome" /><br /> <br /> <EditText<br /> android:id="@+id/edit_name"<br /> android:layout_width="wrap_content"<br /> android:layout_height="wrap_content"<br /> android:layout_alignParentLeft="true"<br /> android:layout_below="@+id/lblnome"<br /> android:ems="10" ><br /> <br /> <requestFocus /><br /> </EditText><br /> <br /> <TextView<br /> android:id="@+id/lblcognome"<br /> android:layout_width="wrap_content"<br /> android:layout_height="wrap_content"<br /> android:layout_alignParentLeft="true"<br /> android:layout_below="@+id/edit_name"<br /> android:layout_marginTop="14dp"<br /> android:text="@string/lblcognome" /><br /> <br /> <EditText<br /> android:id="@+id/edit_lastname"<br /> android:layout_width="wrap_content"<br /> android:layout_height="wrap_content"<br /> android:layout_alignParentLeft="true"<br /> android:layout_below="@+id/lblcognome"<br /> android:ems="10" /><br /> <br /> <Button<br /> android:id="@+id/form_button"<br /> android:layout_width="wrap_content"<br /> android:layout_height="wrap_content"<br /> android:layout_below="@+id/edit_lastname"<br /> android:layout_centerHorizontal="true"<br /> android:layout_marginTop="22dp"<br /> android:text="@string/form_button" /><br /> <br /> </RelativeLayout><br />

/src/Form.java

package com.example.helloapi8;<br /> <br /> import android.app.Activity;<br /> import android.os.Bundle;<br /> import android.widget.TextView;<br /> <br /> public class Form extends Activity {<br /> <br /> @Override<br /> public void onCreate(Bundle savedInstanceState) {<br /> super.onCreate(savedInstanceState);<br /> setContentView(R.layout.activity_form);<br /> final TextView text_name = (TextView) findViewById(R.id.lblvnome2);<br /> final TextView text_lastname = (TextView) findViewById(R.id.lblvcognome2);<br /> Bundle bundle = this.getIntent().getExtras();<br /> text_name.setText(bundle.getString("name"));<br /> text_lastname.setText(bundle.getString("lastname"));<br /> }<br /> <br /> <br /> }<br />

res/activity/activity_form.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"<br /> xmlns:tools="http://schemas.android.com/tools"<br /> android:layout_width="match_parent"<br /> android:layout_height="match_parent" ><br /> <br /> <TextView<br /> android:id="@+id/lblvnome"<br /> android:layout_width="wrap_content"<br /> android:layout_height="wrap_content"<br /> android:layout_alignParentLeft="true"<br /> android:layout_alignParentTop="true"<br /> android:layout_marginTop="20dp"<br /> android:text="@string/lblvnome" /><br /> <br /> <TextView<br /> android:id="@+id/lblvnome2"<br /> android:layout_width="wrap_content"<br /> android:layout_height="wrap_content"<br /> android:layout_alignParentLeft="true"<br /> android:layout_below="@+id/lblvnome"<br /> android:layout_marginTop="16dp"<br /> android:text="@string/lblvnome2" /><br /> <br /> <TextView<br /> android:id="@+id/lblvcognome"<br /> android:layout_width="wrap_content"<br /> android:layout_height="wrap_content"<br /> android:layout_alignParentLeft="true"<br /> android:layout_below="@+id/lblvnome2"<br /> android:layout_marginTop="15dp"<br /> android:text="@string/lblvcognome" /><br /> <br /> <TextView<br /> android:id="@+id/lblvcognome2"<br /> android:layout_width="wrap_content"<br /> android:layout_height="wrap_content"<br /> android:layout_alignParentLeft="true"<br /> android:layout_below="@+id/lblvcognome"<br /> android:layout_marginTop="20dp"<br /> android:text="@string/lblvcognome2" /><br /> <br /> </RelativeLayout><br />

res/values/Strings.xml

<resources><br /> <br /> <string name="app_name">Applicazione Prova</string><br /> <string name="menu_settings">Impostazioni</string><br /> <string name="title_activity_main">Applicazione</string><br /> <string name="lblnome">Inserisci il tuo nome</string><br /> <string name="lblcognome">Inserisci il tuo cognome</string><br /> <string name="lbltop">Premere invio per inviare i dati</string><br /> <string name="form_button">Invia</string><br /> <string name="hello_world">Hello world!</string><br /> <string name="title_activity_form">Form</string><br /> <string name="lblvnome">Nome inserito</string><br /> <string name="lblvnome2"></string><br /> <string name="lblvcognome">Cognome Inserito</string><br /> <string name="lblvcognome2"></string><br /> <br /> </resources>

AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"<br /> package="com.example.helloapi8"<br /> android:versionCode="1"<br /> android:versionName="1.0" ><br /> <br /> <uses-sdk<br /> android:minSdkVersion="16"<br /> android:targetSdkVersion="15" /><br /> <br /> <application<br /> android:icon="@drawable/ic_launcher"<br /> android:label="@string/app_name"<br /> android:theme="@style/AppTheme" ><br /> <activity<br /> android:name=".MainActivity"<br /> android:label="@string/title_activity_main" ><br /> <intent-filter><br /> <action android:name="android.intent.action.MAIN" /><br /> <br /> <category android:name="android.intent.category.LAUNCHER" /><br /> </intent-filter><br /> </activity><br /> <activity<br /> android:name=".Form"<br /> android:label="@string/title_activity_form" ><br /> <intent-filter><br /> <action android:name="android.intent.action.MAIN" /><br /> <br /> <category android:name="android.intent.category.LAUNCHER" /><br /> </intent-filter><br /> </activity><br /> </application><br /> <br /> </manifest>



una volta premuto il tasto avvio purtroppo l'applicazione va in crash e non capisco perchè...potete aiutarmi?

grazie!!