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POAndroid Button Intent crash
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  1. POAndroid Button Intent crash
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    copied!<p>I am making button in ActionBar which would open me another class.. This is my MainActivity code:</p> <pre><code>package com.example.menu; import android.os.Bundle; import android.app.ActionBar; import android.app.Activity; import android.content.Intent; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button add = (Button) findViewById(R.id.add); Button mest = (Button) findViewById(R.id.miskaste); ActionBar actionBar = getActionBar(); String dateString = (String) android.text.format.DateFormat.format("yyyy/MM/dd", new java.util.Date()); actionBar.setTitle(dateString); add = (Button)findViewById(R.id.add); add.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Intent intent = new Intent(MainActivity.this, Add.class); startActivity(intent); } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the myouare going to die alone with enu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } } </code></pre> <p>And this is my Add class:</p> <pre><code>package com.example.menu; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.Button; public class Add extends Activity{ @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.add); Button orderButton = (Button) findViewById(R.id.but); orderButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { finish(); } }); } } </code></pre> <p>And Manifest:</p> <pre><code>&lt;activity android:name=".Add" /&gt; </code></pre> <p>My plan as you see in code is to press the button and run another activity but when I run my app - it crashes. So can someone find mistake I have worked for this for two hours and nothing...</p> <p>And this is my Logcat:</p> <pre><code>05-21 11:57:39.596: E/AndroidRuntime(622): at android.os.Handler.dispatchMessage(Handler.java:99) 05-21 11:57:39.596: E/AndroidRuntime(622): at android.os.Looper.loop(Looper.java:137) 05-21 11:57:39.596: E/AndroidRuntime(622): at android.app.ActivityThread.main(ActivityThread.java:4424) 05-21 11:57:39.596: E/AndroidRuntime(622): at java.lang.reflect.Method.invokeNative(Native Method) 05-21 11:57:39.596: E/AndroidRuntime(622): at java.lang.reflect.Method.invoke(Method.java:511) 05-21 11:57:39.596: E/AndroidRuntime(622): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 05-21 11:57:39.596: E/AndroidRuntime(622): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 05-21 11:57:39.596: E/AndroidRuntime(622): at dalvik.system.NativeStart.main(Native Method) 05-21 11:57:39.596: E/AndroidRuntime(622): Caused by: java.lang.NullPointerException 05-21 11:57:39.596: E/AndroidRuntime(622): at com.example.menu.MainActivity.onCreate(MainActivity.java:27) 05-21 11:57:39.596: E/AndroidRuntime(622): at android.app.Activity.performCreate(Activity.java:4465) 05-21 11:57:39.596: E/AndroidRuntime(622): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 05-21 11:57:39.596: E/AndroidRuntime(622): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920) </code></pre>
 

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