The Application has stopped unexpectedly please try again {com.android.internal.os.ZygoteInit$Meth}

[Rohit Gaikwad]

I am trying my first Android app with 2 text and 2 Buttons
the app is working fine and also getting loaded in {AVD} but when i click one of the button it stops saying "stopped unexpectedly please try again"

The XML code is
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="top" 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="com.rg.hiworld.MainActivity" > <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:text="@string/hello_world" /> <TextView android:id="@+id/txt" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:text="@string/me" /> <Button android:id="@+id/Badd" android:layout_width="250dp" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_below="@+id/textView1" android:layout_marginRight="18dp" android:text="@string/Add" android:textSize="30sp" /> <Button android:layout_width="250dp" android:layout_height="wrap_content" android:layout_below="@+id/Badd" android:layout_centerHorizontal="true" android:text="@string/sub" android:textSize="30sp" android:id="@+id/Bsub"/> </RelativeLayout>

The Main Activity java code is
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

package com.rg.hiworld;


import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;




public class MainActivity extends Activity {
   int count;
   Button add,sub;
   TextView disp;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        count=0;
       add = (Button) findViewById(R.id.Badd);
       sub =(Button) findViewById(R.id.Bsub);
       disp =(TextView) findViewById(R.id.txt);
       add.setOnClickListener(new View.OnClickListener() {
		
		@Override
		public void onClick(View v) {
			// TODO Auto-generated method stub
			count++;
			disp.setText(count); 
		}
	});
       sub.setOnClickListener(new View.OnClickListener() {
		
		@Override
		public void onClick(View v) {
			// TODO Auto-generated method stub
			count--;
			disp.setText(count); 
		}
	});
    }

  
}

I thought the error is due to the Android Version i am using on Emulator but even tried it with 5.0.1 and 5.1.1 and also with target AVD 2.2
But still the same error

Thanks in advance

[Karthik Shiraly]

It's because TextView.setText(int) doesn't do what you think it does. From http://developer.android.com/reference/android/widget/TextView.html#setText(int) , the int argument is treated as a resource ID of a string resource. When you set setText(count), android goes looking for a string resource with ID=value of count, doesn't find it and crashes. The logcat exception trace will have revealed that.

Use Integer.toString(count) to set the text.
...
And never assume anything about an API. Javadocs are your friend ;)

[Rohit Gaikwad]

Really Thanks Karthik Shiraly