Question

I just started to study the android so im asking such a simple question. I tried to navigate(move from one view to another). This code shows no error and the button in first view is showing. But when i click the button nothing happens and app crashed.Can anyone please help me with where i’m going wrong in my code.

pushActivity.java

  package com.myapp.pus;

    import android.app.Activity;
    import android.content.Intent;

    import android.os.Bundle;
    import android.widget.Button;

    import android.view.View;
    public class PushActivity extends Activity {

        Button mybtn;
        /** Called when the activity is first created. */
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
            mybtn = (Button)findViewById(R.id.mybtn);
            mybtn.setOnClickListener(new View.OnClickListener(){

                public void onClick(View view) {
                    Intent nextScreen = new Intent(getApplicationContext(), SecondScreen.class);
                   // startActivity(new Intent(action));
                    startActivity(nextScreen);
                }
            });



    }
 }

main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />

    <Button
        android:id="@+id/mybtn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
       />

</LinearLayout>

Second Screen

package com.myapp.pus;

import android.app.Activity;
import android.os.Bundle;



public class SecondScreen extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.screen2);            
        // Binding Click event to Button    
    }    
}

Screen2.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >


</LinearLayout>

Thanks in advance.Hope for your help.

Answer 1

You need to define the SecondScreen Activity to your AndroidManifest.xml as below,

<activity android:name=".SecondScreen"></activity> before the tag is finish.