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POUnfortunately HelloWorld Stopped (My app stopped on emulator: Unfortunately )
 

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  1. POUnfortunately HelloWorld Stopped (My app stopped on emulator: Unfortunately )
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    <p>I am completely a beginner android developer but a good Java J2SE Developer. I just want to know that while I am working on first Android app: after compiling it and having no errors facing problems running it in an emulator! my code for java class is: package com.example.helloworld;</p> <pre><code> import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.widget.Button; public class MainActivity extends Activity { //Variables Declaration private Button one; private Button two; private Button three; private Button four; private Button five; private Button six; private Button seven; private Button eight; private Button nine; private Button plus; private Button minus; private Button divide; private Button multiply; private Button zero; private Button dot; private Button equal; private Button clr; //End of Variables Declaration @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); addListenerOnButton(); } public void addListenerOnButton(){ one=(Button) this.findViewById(R.id.button1); two=(Button) this.findViewById(R.id.button2); three=(Button) this.findViewById(R.id.button3); four=(Button) this.findViewById(R.id.button4); five=(Button) this.findViewById(R.id.button5); six=(Button) this.findViewById(R.id.button6); seven=(Button) this.findViewById(R.id.button7); eight=(Button) this.findViewById(R.id.button8); nine=(Button) this.findViewById(R.id.button9); zero=(Button) this. findViewById(R.id.button14); dot=(Button) this.findViewById(R.id.button15); plus=(Button) this.findViewById(R.id.button13); equal=(Button) this.findViewById(R.id.button16); clr=(Button) this.findViewById(R.id.button17); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } } </code></pre> <p>the .xml is:</p> <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/rel" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@style/AppBaseTheme" 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" &gt; &lt;LinearLayout android:id="@+id/lay" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:orientation="vertical" &gt; &lt;EditText android:id="@+id/numf2" android:layout_width="match_parent" android:layout_height="wrap_content" android:ems="10" android:inputType="numberDecimal" /&gt; &lt;EditText android:id="@+id/opf" android:layout_width="290dp" android:layout_height="wrap_content" android:layout_marginTop="16dp" android:ems="10" android:inputType="numberDecimal|text" /&gt; &lt;EditText android:id="@+id/numf1" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="26dp" android:ems="10" android:inputType="numberDecimal" &gt; &lt;requestFocus /&gt; &lt;/EditText&gt; &lt;/LinearLayout&gt; &lt;Button android:id="@+id/button2" style="?android:attr/buttonStyleSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignTop="@+id/button1" android:layout_toRightOf="@+id/button1" android:text="2" /&gt; &lt;Button android:id="@+id/button3" style="?android:attr/buttonStyleSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/button2" android:layout_alignBottom="@+id/button2" android:layout_toRightOf="@+id/button2" android:text="3" /&gt; &lt;Button android:id="@+id/button4" style="?android:attr/buttonStyleSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@+id/button1" android:layout_alignLeft="@+id/button1" android:text="4" /&gt; &lt;Button android:id="@+id/button5" style="?android:attr/buttonStyleSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/button4" android:layout_alignBottom="@+id/button4" android:layout_toLeftOf="@+id/button3" android:text="5" /&gt; &lt;Button android:id="@+id/button6" style="?android:attr/buttonStyleSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/button5" android:layout_alignBottom="@+id/button5" android:layout_alignLeft="@+id/button3" android:text="6" /&gt; &lt;Button android:id="@+id/button7" style="?android:attr/buttonStyleSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@+id/button4" android:layout_alignLeft="@+id/button4" android:text="7" /&gt; &lt;Button android:id="@+id/button8" style="?android:attr/buttonStyleSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@+id/button5" android:layout_alignLeft="@+id/button5" android:text="8" /&gt; &lt;Button android:id="@+id/button9" style="?android:attr/buttonStyleSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@+id/button6" android:layout_alignLeft="@+id/button6" android:text="9" /&gt; &lt;Button android:id="@+id/button10" style="?android:attr/buttonStyleSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignTop="@+id/button9" android:layout_toRightOf="@+id/button6" android:text="Button" /&gt; &lt;Button android:id="@+id/button11" style="?android:attr/buttonStyleSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignRight="@+id/button10" android:layout_alignTop="@+id/button6" android:text="Button" /&gt; &lt;Button android:id="@+id/button12" style="?android:attr/buttonStyleSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/button11" android:layout_below="@+id/button11" android:text="Button" /&gt; &lt;Button android:id="@+id/button13" style="?android:attr/buttonStyleSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/button12" android:layout_alignParentBottom="true" android:layout_alignRight="@+id/button12" android:text="+" /&gt; &lt;Button android:id="@+id/button1" style="?android:attr/buttonStyleSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@+id/button13" android:layout_alignLeft="@+id/lay" android:text="1" /&gt; &lt;Button android:id="@+id/button14" style="?android:attr/buttonStyleSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/button13" android:layout_alignBottom="@+id/button13" android:layout_alignLeft="@+id/button1" android:layout_alignRight="@+id/button2" android:text="0" /&gt; &lt;Button android:id="@+id/button15" style="?android:attr/buttonStyleSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/button3" android:layout_alignRight="@+id/button3" android:layout_alignTop="@+id/button13" android:text="dot" /&gt; &lt;Button android:id="@+id/button16" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/button13" android:layout_alignBottom="@+id/button13" android:layout_alignRight="@+id/lay" android:layout_toRightOf="@+id/button12" android:text="=" /&gt; &lt;Button android:id="@+id/button17" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/button16" android:layout_alignRight="@+id/lay" android:layout_alignTop="@+id/button10" android:text="CLR" /&gt; &lt;/RelativeLayout&gt; </code></pre> <p>please help me I have searched a lot but failed to find any solution my app does't start at all and unfortunately it stopped. Thanks in advance</p>
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    1. COplease have a look at the logcat error output first, post it here if possible.
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    2. COpost some log..
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    3. COI am new to Android Development tell me how can I post the Log? Please!
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