Java AndEngine字体加载:NullPointerException
好的,我一直在遵循这个教程并实现我的游戏。但是,我在font对象上得到了一个空指针异常。我已经在assets/font文件夹中加载了font.ttf文件,下面是代码。请帮忙。谢谢 在我的游戏场景类中:Java AndEngine字体加载:NullPointerException,java,android,nullpointerexception,andengine,Java,Android,Nullpointerexception,Andengine,好的,我一直在遵循这个教程并实现我的游戏。但是,我在font对象上得到了一个空指针异常。我已经在assets/font文件夹中加载了font.ttf文件,下面是代码。请帮忙。谢谢 在我的游戏场景类中: private void createHUD() { gameHUD = new HUD(); scoreText = new Text(20, 420, resourcesManager.font, "Score: 0123456789", new Text
private void createHUD()
{
gameHUD = new HUD();
scoreText = new Text(20, 420, resourcesManager.font, "Score: 0123456789", new TextOptions(HorizontalAlign.LEFT), vbom);
scoreText = new Text(20, 420,mFont, "Score: 0123456789", new TextOptions(HorizontalAlign.LEFT), vbom);
scoreText.setSkewCenter(0, 0);
scoreText.setText("Score: 0");
gameHUD.attachChild(scoreText);
camera.setHUD(gameHUD);
}
在我的ResourcesManager类中:
private void loadMenuFonts()
{
FontFactory.setAssetBasePath("font/");
final ITexture mainFontTexture = new BitmapTextureAtlas(activity.getTextureManager(), 256, 256, TextureOptions.BILINEAR);
font = FontFactory.createStrokeFromAsset(activity.getFontManager(), mainFontTexture, activity.getAssets(), "font.ttf", 50, true, Color.WHITE, 2, Color.BLACK);
font.load();
}
以及logcat:
05-12 15:57:37.478: E/AndroidRuntime(20431): java.lang.NullPointerException: Attempt to invoke interface method 'org.andengine.opengl.font.Letter org.andengine.opengl.font.IFont.getLetter(char)' on a null object reference
05-12 15:57:37.478: E/AndroidRuntime(20431): at org.andengine.opengl.font.FontUtils.measureText(FontUtils.java:95)
05-12 15:57:37.478: E/AndroidRuntime(20431): at org.andengine.opengl.font.FontUtils.measureText(FontUtils.java:70)
05-12 15:57:37.478: E/AndroidRuntime(20431): at org.andengine.opengl.font.FontUtils.measureText(FontUtils.java:49)
05-12 15:57:37.478: E/AndroidRuntime(20431): at org.andengine.entity.text.Text.setText(Text.java:201)
05-12 15:57:37.478: E/AndroidRuntime(20431): at org.andengine.entity.text.Text.<init>(Text.java:159)
05-12 15:57:37.478: E/AndroidRuntime(20431): at org.andengine.entity.text.Text.<init>(Text.java:146)
05-12 15:57:37.478: E/AndroidRuntime(20431): at org.andengine.entity.text.Text.<init>(Text.java:138)
05-12 15:57:37.478: E/AndroidRuntime(20431): at org.andengine.entity.text.Text.<init>(Text.java:110)
05-12 15:57:37.478: E/AndroidRuntime(20431): at org.andengine.entity.text.Text.<init>(Text.java:102)
05-12 15:57:37.478: E/AndroidRuntime(20431): at com.packagename.scene.GameScene.createHUD(GameScene.java:55)
05-12 15:57:37.478: E/AndroidRuntime(20431): at com.packagename.scene.GameScene.createScene(GameScene.java:39)
05-12 15:57:37.478: E/AndroidRuntime(20431): at com.packagename.base.BaseScene.<init>(BaseScene.java:36)
05-12 15:57:37.478: E/AndroidRuntime(20431): at com.packagename.scene.GameScene.<init>(GameScene.java:26)
05-12 15:57:37.478: E/AndroidRuntime(20431): at com.packagename.manager.SceneManager$1.onTimePassed(SceneManager.java:112)
05-12 15:57:37.478: E/AndroidRuntime(20431): at org.andengine.engine.handler.timer.TimerHandler.onUpdate(TimerHandler.java:98)
05-12 15:57:37.478: E/AndroidRuntime(20431): at org.andengine.engine.handler.UpdateHandlerList.onUpdate(UpdateHandlerList.java:47)
05-12 15:57:37.478:E/AndroidRuntime(20431):java.lang.NullPointerException:尝试在空对象引用上调用接口方法“org.andengine.opengl.font.Letter org.andengine.opengl.font.IFont.getLetter(char)”
05-12 15:57:37.478:E/AndroidRuntime(20431):位于org.andengine.opengl.font.FontUtils.measureText(FontUtils.java:95)
05-12 15:57:37.478:E/AndroidRuntime(20431):位于org.andengine.opengl.font.FontUtils.measureText(FontUtils.java:70)
05-12 15:57:37.478:E/AndroidRuntime(20431):位于org.andengine.opengl.font.FontUtils.measureText(FontUtils.java:49)
05-12 15:57:37.478:E/AndroidRuntime(20431):位于org.andengine.entity.text.text.setText(text.java:201)
05-12 15:57:37.478:E/AndroidRuntime(20431):位于org.andengine.entity.text.text.(text.java:159)
05-12 15:57:37.478:E/AndroidRuntime(20431):位于org.andengine.entity.text.text.(text.java:146)
05-12 15:57:37.478:E/AndroidRuntime(20431):位于org.andengine.entity.text.text.(text.java:138)
05-12 15:57:37.478:E/AndroidRuntime(20431):位于org.andengine.entity.text.text.(text.java:110)
05-12 15:57:37.478:E/AndroidRuntime(20431):位于org.andengine.entity.text.text.(text.java:102)
05-12 15:57:37.478:E/AndroidRuntime(20431):在com.packagename.scene.GameScene.createHUD(GameScene.java:55)
05-12 15:57:37.478:E/AndroidRuntime(20431):在com.packagename.scene.GameScene.createScene(GameScene.java:39)
05-12 15:57:37.478:E/AndroidRuntime(20431):位于com.packagename.base.BaseScene。(BaseScene.java:36)
05-12 15:57:37.478:E/AndroidRuntime(20431):在com.packagename.scene.GameSecene。(GameSecene.java:26)
05-12 15:57:37.478:E/AndroidRuntime(20431):在com.packagename.manager.SceneManager$1.onTimePassed(SceneManager.java:112)
05-12 15:57:37.478:E/AndroidRuntime(20431):位于org.andengine.engine.handler.timer.TimerHandler.onUpdate(TimerHandler.java:98)
05-12 15:57:37.478:E/AndroidRuntime(20431):位于org.andengine.engine.handler.UpdateHandlerList.onUpdate(UpdateHandlerList.java:47)
试试看
而不是
final ITexture mainFontTexture = new BitmapTextureAtlas(activity.getTextureManager(), 256, 256, TextureOptions.BILINEAR);
好了,终于得到了错误!错误在于,在GameSecene类中创建文本时,必须从ResourceManager类访问字体。但是没有加载字体,因为没有调用函数loadMenuFonts()。因此,将该代码段移动到loadGameFonts()函数中可以确保在调用函数loadGameResources()函数时调用loadGameFonts()函数
public void loadGameResources()
{
loadGameGraphics();
loadGameFonts();
loadGameAudio();
}
以及loadGameFonts()函数:
private void loadGameFonts()
{
FontFactory.setAssetBasePath("font/");
final ITexture mainFontTexture = new BitmapTextureAtlas(activity.getTextureManager(), 256, 256, TextureOptions.BILINEAR);
font = FontFactory.createStrokeFromAsset(activity.getFontManager(), mainFontTexture, activity.getAssets(), "font.ttf", 50, true, Color.WHITE, 2, Color.BLACK);
//mainFontTexture.load();
font.load();
}
在参数中必须有一个textureManager,对吗?看这里,我用这个作为我的参数,但仍然没有。同样的错误弹出。看起来字体没有加载。
private void loadGameFonts()
{
FontFactory.setAssetBasePath("font/");
final ITexture mainFontTexture = new BitmapTextureAtlas(activity.getTextureManager(), 256, 256, TextureOptions.BILINEAR);
font = FontFactory.createStrokeFromAsset(activity.getFontManager(), mainFontTexture, activity.getAssets(), "font.ttf", 50, true, Color.WHITE, 2, Color.BLACK);
//mainFontTexture.load();
font.load();
}