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POEnemy Spawning Android
 

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    <p>I am making an android game that spawns enemy sprites at a certain interval at the top of the screen. There are no syntax errors, but when I run the game it crashes because of this function:</p> <pre><code>public void updateEnemies() { if (numEnemiesCreated == numVisibleEnemies) { if (timeLastCreatedEnemy + 1000 &lt; System.currentTimeMillis()) { timeLastCreatedEnemy = System.currentTimeMillis(); boolean createdNewEnemy = false; for (int i = 0; i &lt; this.numVisibleEnemies; i++) { if (createdNewEnemy == false) { if (holderEnemy[i].isDisposed()) { this.generateNewEnemy(i); createdNewEnemy = true; } } } } for(int i = 0; i&lt;numVisibleEnemies; i++){ if(!holderEnemy[i].isDisposed()){ holderEnemy[i].move(); } } } else { holderEnemy[numEnemiesCreated] = new Enemy(context, 0, 0); numEnemiesCreated++; } } </code></pre> <p>I have tried everything, I just can't get it to work! Here is my log cat crash report:</p> <pre><code>05-25 18:49:13.031: W/dalvikvm(6736): threadid=9: thread exiting with uncaught exception (group=0x40015578) 05-25 18:49:13.035: E/AndroidRuntime(6736): FATAL EXCEPTION: Thread-10 05-25 18:49:13.035: E/AndroidRuntime(6736): java.lang.NullPointerException 05-25 18:49:13.035: E/AndroidRuntime(6736): at com.jlennon.gametest.EnemySpawn.updateEnemies(EnemySpawn.java:49) 05-25 18:49:13.035: E/AndroidRuntime(6736): at com.jlennon.gametest.MainGamePanel$AnimationThread.update(MainGamePanel.java:94) 05-25 18:49:13.035: E/AndroidRuntime(6736): at com.jlennon.gametest.MainGamePanel$AnimationThread.run(MainGamePanel.java:61) </code></pre>
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