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POI get an error doing a CountDown
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  1. POI get an error doing a CountDown
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    copied!<p>i am Newbie and i am receiving errors and i don´t know why D:</p> <p>When i press Button my app crashes. Here my code: </p> <p>I tried different versions of countdowns and no one runs D: Thanks...</p> <p><strong>MainActivity</strong></p> <pre><code> package com.example.chrontest; import android.os.Bundle; import android.app.Activity; 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 Start = (Button) findViewById(R.id.button1); Start.setOnClickListener(new OnClickListener(){ @Override public void onClick(View v) { Jungle CuentaAtras = new Jungle(6000, 1000); CuentaAtras.start(); }}); } } </code></pre> <p><strong>Jungle.class</strong></p> <pre><code> package com.example.chrontest; import android.os.CountDownTimer; import android.widget.TextView; public class Jungle extends CountDownTimer{ TextView Texto = (TextView) findViewById(R.id.textView1); public Jungle(long millisInFuture, long countDownInterval) { super(millisInFuture, countDownInterval); // TODO Auto-generated constructor stub } private TextView findViewById(int textview1) { // TODO Auto-generated method stub return null; } @Override public void onFinish() { // TODO Auto-generated method stub Texto.setText("GAME OVER"); } @Override public void onTick(long millisUntilFinished) { Texto.setText ("" + millisUntilFinished / 1000); } } </code></pre> <p><strong>And here my LogCat:</strong></p> <pre><code>12-03 04:13:41.175: D/gralloc_goldfish(1395): Emulator without GPU emulation detected. 12-03 04:13:52.325: D/AndroidRuntime(1395): Shutting down VM 12-03 04:13:52.325: W/dalvikvm(1395): threadid=1: thread exiting with uncaught exception (group=0x41465700) 12-03 04:13:52.345: E/AndroidRuntime(1395): FATAL EXCEPTION: main 12-03 04:13:52.345: E/AndroidRuntime(1395): java.lang.NullPointerException 12-03 04:13:52.345: E/AndroidRuntime(1395): at com.example.chrontest.Jungle.onTick(Jungle.java:28) 12-03 04:13:52.345: E/AndroidRuntime(1395): at android.os.CountDownTimer$1.handleMessage(CountDownTimer.java:124) 12-03 04:13:52.345: E/AndroidRuntime(1395): at android.os.Handler.dispatchMessage(Handler.java:99) 12-03 04:13:52.345: E/AndroidRuntime(1395): at android.os.Looper.loop(Looper.java:137) 12-03 04:13:52.345: E/AndroidRuntime(1395): at android.app.ActivityThread.main(ActivityThread.java:5103) 12-03 04:13:52.345: E/AndroidRuntime(1395): at java.lang.reflect.Method.invokeNative(Native Method) 12-03 04:13:52.345: E/AndroidRuntime(1395): at java.lang.reflect.Method.invoke(Method.java:525) 12-03 04:13:52.345: E/AndroidRuntime(1395): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 12-03 04:13:52.345: E/AndroidRuntime(1395): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 12-03 04:13:52.345: E/AndroidRuntime(1395): at dalvik.system.NativeStart.main(Native Method) 12-03 04:13:53.925: I/Process(1395): Sending signal. PID: 1395 SIG: 9 </code></pre> <p><strong>UPDATED:</strong></p> <p>Lol i don´t put my layout, and.. today i see that i don´t have a view or anything to see my countdown, or just this will appear in the screen, lol i don´t know :|</p> <p>This is my layout:</p> <pre><code>&lt;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: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;TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:layout_marginBottom="34dp" android:textAppearance="?android:attr/textAppearanceLarge" /&gt; &lt;Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/textView1" android:layout_centerHorizontal="true" android:text="Button" /&gt; &lt;/RelativeLayout&gt; </code></pre>
 

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