handelling multiple views in android

Question

I have used multiple activities to handle mutiple views in android . I found that some where in the blog but I'm lost inside it.

I'm not able to switch between 2 views , my code is as follows:

main file

public class MultiViewActivity extends Activity {
 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.main);
 Button next = (Button) findViewById(R.id.button1); 
 next.setOnClickListener(new View.OnClickListener() { 
 public void onClick(View view) { 
 Intent myIntent = new Intent(view.getContext(), MultiViews2.class); 
 startActivityForResult(myIntent, 0); 
 } 
 });
 }
}

---

xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:orientation="vertical" >
 <Button android:text="View 2" 
 android:id="@+id/button1" 
 android:layout_width="fill_parent" 
 android:layout_height="wrap_content"> 
 </Button> 
</LinearLayout>

---

another activity:

 public class MultiViews2 extends Activity { 
 /** Called when the activity is first created. */ 
 @Override 
 public void onCreate(Bundle savedInstanceState) { 
 super.onCreate(savedInstanceState); 
 setContentView(R.layout.main2); 
 Button next = (Button) findViewById(R.id.button1); 
 next.setOnClickListener(new View.OnClickListener() { 
 public void onClick(View view) { 
 Intent myIntent = new Intent(view.getContext(), MultiViewActivity.class); 
 startActivityForResult(myIntent, 0); 
 } 
 }); 
 } 
 } 

---

xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:orientation="vertical" >
 <Button android:text="View 1" 
 android:id="@+id/button2" 
 android:layout_width="fill_parent" 
 android:layout_height="wrap_content"> 
 </Button> 
</LinearLayout>

---

manifest :

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
 package="com.multiview.org"
 android:versionCode="1"
 android:versionName="1.0" >
 <uses-sdk android:minSdkVersion="10" />
 <application
 android:icon="@drawable/ic_launcher"
 android:label="@string/app_name" >
 <activity
 android:name=".MultiViewActivity"
 android:label="@string/app_name" >
 <intent-filter>
 <action android:name="android.intent.action.MAIN" />
 <category android:name="android.intent.category.LAUNCHER" />
 </intent-filter>
 </activity>
 <activity android:name=".MultiViews2"></activity>
 </application>
</manifest>

---

whenever I click on button2 it shows me error the application has stopped unexpectedly.
Anything I missed above. I'm very new to android programming.

• 0xC0DED00D: Can you post the LogCat error also, so that we get to know the exact problem??

Answer 1

Problem in Below line in MultiViews2 Class

Button next = (Button) findViewById(R.id.button2); 

Instead Of

Button next = (Button) findViewById(R.id.button1); 

Answer 2

Well considering your views are confusing and I cant say which one is main.xml and which one is main2.xml - the error is in one of the activities, both of them if you see have button 1 being referenced.

 Button next = (Button) findViewById(R.id.button1); 

So obviously for one it should be

 Button next = (Button) findViewById(R.id.button2); 

make that change and it should work. And for ease of understanding change view 1 to correspond to button 1 and similarly for 2. Else you'll run into more such problems