因此，当我尝试将Java项目转换为Android项目时，每当我尝试运行它时，我的游戏都会在我的手机上崩溃，并且我在log cat中遇到以下错误。我正在尝试集成SDK，以便我可以通过屏幕在游戏中放置广告。
logcat错误：
10-25 15:13:06.580: E/AndroidRuntime(13472): FATAL EXCEPTION: main
10-25 15:13:06.580: E/AndroidRuntime(13472): Process: com.AustinMagnuson.mygdxgame, PID: 13472
10-25 15:13:06.580: E/AndroidRuntime(13472): java.lang.NoClassDefFoundError: Failed resolution of: Lcom/AustinMagnuson/mygdxgame/FallingFlame;
10-25 15:13:06.580: E/AndroidRuntime(13472): at com.AustinMagnuson.mygdxgame.MainActivity.onCreate(MainActivity.java:20)
10-25 15:13:06.580: E/AndroidRuntime(13472): at android.app.Activity.performCreate(Activity.java:6221)
10-25 15:13:06.580: E/AndroidRuntime(13472): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
10-25 15:13:06.580: E/AndroidRuntime(13472): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2614)
10-25 15:13:06.580: E/AndroidRuntime(13472): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
10-25 15:13:06.580: E/AndroidRuntime(13472): at android.app.ActivityThread.access$900(ActivityThread.java:172)
10-25 15:13:06.580: E/AndroidRuntime(13472): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1421)
10-25 15:13:06.580: E/AndroidRuntime(13472): at android.os.Handler.dispatchMessage(Handler.java:102)
10-25 15:13:06.580: E/AndroidRuntime(13472): at android.os.Looper.loop(Looper.java:145)
10-25 15:13:06.580: E/AndroidRuntime(13472): at android.app.ActivityThread.main(ActivityThread.java:5835)
10-25 15:13:06.580: E/AndroidRuntime(13472): at java.lang.reflect.Method.invoke(Native Method)
10-25 15:13:06.580: E/AndroidRuntime(13472): at java.lang.reflect.Method.invoke(Method.java:372)
10-25 15:13:06.580: E/AndroidRuntime(13472): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)
10-25 15:13:06.580: E/AndroidRuntime(13472): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)
10-25 15:13:06.580: E/AndroidRuntime(13472): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.AustinMagnuson.mygdxgame.FallingFlame" on path: DexPathList[[zip file "/data/app/com.AustinMagnuson.mygdxgame-1/base.apk"],nativeLibraryDirectories=[/data/app/com.AustinMagnuson.mygdxgame-1/lib/arm, /vendor/lib, /system/lib]]
10-25 15:13:06.580: E/AndroidRuntime(13472): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
10-25 15:13:06.580: E/AndroidRuntime(13472): at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
10-25 15:13:06.580: E/AndroidRuntime(13472): at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
10-25 15:13:06.580: E/AndroidRuntime(13472): ... 14 more
10-25 15:13:06.580: E/AndroidRuntime(13472): Suppressed: java.lang.ClassNotFoundException: com.AustinMagnuson.mygdxgame.FallingFlame
10-25 15:13:06.580: E/AndroidRuntime(13472): at java.lang.Class.classForName(Native Method)
10-25 15:13:06.580: E/AndroidRuntime(13472): at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
10-25 15:13:06.580: E/AndroidRuntime(13472): at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
10-25 15:13:06.580: E/AndroidRuntime(13472): at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
10-25 15:13:06.580: E/AndroidRuntime(13472): ... 15 more
10-25 15:13:06.580: E/AndroidRuntime(13472): Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available
（从Java转换为Android项目）
FallingFlame.Java：
package com.AustinMagnuson.mygdxgame;
import java.util.Iterator;
import com.AustinMagnuson.camera.OrthoCamera;
import com.badlogic.gdx.ApplicationListener;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.audio.Music;
import com.badlogic.gdx.audio.Sound;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.GL10;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.BitmapFont;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.g2d.TextureAtlas;
import com.badlogic.gdx.math.MathUtils;
import com.badlogic.gdx.math.Rectangle;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.scenes.scene2d.InputEvent;
import com.badlogic.gdx.scenes.scene2d.InputListener;
import com.badlogic.gdx.scenes.scene2d.Stage;
import com.badlogic.gdx.scenes.scene2d.ui.Label;
import com.badlogic.gdx.scenes.scene2d.ui.Label.LabelStyle;
import com.badlogic.gdx.scenes.scene2d.ui.Skin;
import com.badlogic.gdx.scenes.scene2d.ui.TextButton;
import com.badlogic.gdx.scenes.scene2d.ui.TextButton.TextButtonStyle;
import com.badlogic.gdx.utils.Array;
import com.badlogic.gdx.utils.TimeUtils;
public class FallingFlame implements ApplicationListener {
private static Texture dropImage;
private Texture bounds1;
private static Texture Tree;
private Texture Background;
private Rectangle bounds;
private SpriteBatch batch;
Player player;
private Array<Rectangle> raindrops;
private Array<Rectangle> trees;
private long lastTreeTime;
private long lastDropTime;
public static int WIDTH = 1080, HEIGHT =720;
float stateTime;
String movement;
float gravity = 0.0f;
private OrthoCamera camera;
private int score;
private String yourScoreName;
private String yourScoreName2;
BitmapFont yourBitmapFontName;
BitmapFont yourBitmapFontName2;
boolean GameOver = false;
Stage stage;
Label label;
LabelStyle style;
BitmapFont font;
TextureAtlas buttonAtlas;
TextButtonStyle buttonStyle;
TextButton button;
Skin skin;
private Music FFmusic;
private Sound treeSound;
private Sound waterSound;
private void spawnRaindrop(){
Rectangle raindrop = new Rectangle();
raindrop.x = MathUtils.random(FallingFlame.WIDTH, FallingFlame.WIDTH);
raindrop.y = MathUtils.random(0, FallingFlame.WIDTH - FallingFlame.dropImage.getWidth());
raindrop.width = 40;
raindrop.height = 70;
raindrops.add(raindrop);
lastDropTime = TimeUtils.nanoTime();
}
private void spawnTree(){
Rectangle tree = new Rectangle();
tree.x = MathUtils.random(FallingFlame.WIDTH, FallingFlame.WIDTH * 1);
tree.y = MathUtils.random(0, FallingFlame.WIDTH - FallingFlame.Tree.getWidth());
tree.width = 40;
tree.height = 40;
trees.add(tree);
lastTreeTime = TimeUtils.nanoTime();
}
@Override
public void create() {
score = 0;
yourScoreName = "Score: 0";
yourScoreName2 = "";
yourBitmapFontName = new BitmapFont();
yourBitmapFontName2 = new BitmapFont();
camera = new OrthoCamera();
camera.setToOrtho(false, 1080, 720);
waterSound = Gdx.audio.newSound(Gdx.files.internal("Water.mp3"));
treeSound = Gdx.audio.newSound(Gdx.files.internal("Tree.mp3"));
FFmusic = Gdx.audio.newMusic(Gdx.files.internal("Music.mp3"));
Background = new Texture(Gdx.files.internal("Background.png"));
bounds1 = new Texture(Gdx.files.internal("bounds.png"));
dropImage = new Texture(Gdx.files.internal("Water2.png"));
Tree = new Texture(Gdx.files.internal("Tree.png"));
bounds = new Rectangle();
bounds.x = 350;
bounds.y = 800;
bounds.width = 35;
bounds.height = 0;
FFmusic.setLooping(true);
FFmusic.play();
player = new Player (new Vector2(Gdx.graphics.getWidth() / 2, Gdx.graphics.getHeight() /2), "");
raindrops = new Array<Rectangle>();
spawnRaindrop();
trees = new Array<Rectangle>();
spawnTree();
player.setPosition(new Vector2(300, 660));
stage = new Stage(Gdx.graphics.getWidth(), Gdx.graphics.getHeight(), true);
font = new BitmapFont(Gdx.files.internal("font.fnt"), false);
style = new LabelStyle(font, Color.WHITE);
skin = new Skin();
buttonAtlas = new TextureAtlas("buttons/button.pack");
skin.addRegions(buttonAtlas);
Gdx.input.setInputProcessor(stage);
batch = new SpriteBatch();
}
@Override
public void dispose() {
batch.dispose();
}
public void render1() {
buttonStyle = new TextButtonStyle();
buttonStyle.up = skin.getDrawable("button");
buttonStyle.over = skin.getDrawable("buttonpressed");
buttonStyle.down = skin.getDrawable("buttonpressed");
buttonStyle.font = font;
button = new TextButton(" ", buttonStyle);
stage.addActor(button);
button.setPosition(800, 2);
button.addListener(new InputListener(){
public boolean touchDown(InputEvent event, float x, float y, int pointer, int button){
FFmusic.dispose();
GameOver = false;
create();
return true;
}
});
yourScoreName2 = "GAME OVER";
Background = new Texture(Gdx.files.internal("Background1.png"));
player.update();
camera.update();
stage.act();
batch.setProjectionMatrix(camera.combined);
batch.begin();
batch.draw(Background, 0, 0);
yourBitmapFontName.setColor(1.0f, 1.0f, 1.0f, 1.0f);
yourBitmapFontName.draw(batch, yourScoreName, 50, 700);
yourBitmapFontName2.setColor(1.0f, 1.0f, 1.0f, 1.0f);
yourBitmapFontName2.draw(batch, yourScoreName2, 470, 700);
batch.draw(bounds1, bounds.x, bounds.y);
batch.draw(player.getCurrentFrame(), player.getPosition().x, player.getPosition().y);
stage.draw();
batch.end();
}
@Override
public void render() {
if(GameOver){
render1();
return;
}
Gdx.gl.glClearColor(0, 0, 0, 1);
Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
if(TimeUtils.nanoTime() - lastTreeTime > 1000000000) spawnTree();
if(TimeUtils.nanoTime() - lastDropTime > 900000000) spawnRaindrop();
bounds.set(bounds.x, bounds.y, bounds.getWidth(), gravity);
if(stateTime < .7)
{
stateTime += Gdx.graphics.getDeltaTime();
}
else
{
stateTime = 0;
}
float max_y = 670;
float min_y = 12;
float virtual_y = bounds.y;
if(Gdx.input.isTouched())
{
virtual_y += 6.5;
gravity = 13.5f;
movement = "up";
}
else
{
if (gravity > 0 )
{
virtual_y += gravity;
gravity -= 0.3;
}
virtual_y -= 7;
movement = "down";
}
if (virtual_y > max_y)
{
bounds.y = max_y ;
}
else
{
bounds.y = virtual_y;
}
if (bounds.y < min_y)
{
bounds.y = min_y;
}
Iterator<Rectangle> iter = trees.iterator();
while(iter.hasNext()){
Rectangle tree = iter.next();
tree.x -= 200 * Gdx.graphics.getDeltaTime();
if(tree.x + 64 < 0) iter.remove();
if(tree.overlaps(bounds)){
treeSound.play();
score++;
yourScoreName = "Score: " + score;
iter.remove();
}
Iterator<Rectangle> iterator = raindrops.iterator();
while(iterator.hasNext()){
Rectangle raindrop = iterator.next();
raindrop.x -= 20 * Gdx.graphics.getDeltaTime();
if(raindrop.x + 64 < 0) iterator.remove();
if(raindrop.overlaps(bounds)){
waterSound.play();
GameOver = true;
}
}
}
player.update();
camera.update();
batch.setProjectionMatrix(camera.combined);
batch.begin();
batch.draw(Background, 0, 0);
yourBitmapFontName.setColor(1.0f, 1.0f, 1.0f, 1.0f);
yourBitmapFontName.draw(batch, yourScoreName, 50, 700);
yourBitmapFontName2.setColor(1.0f, 1.0f, 1.0f, 1.0f);
yourBitmapFontName2.draw(batch, yourScoreName2, 500, 500);
batch.draw(bounds1, bounds.x, bounds.y);
batch.draw(player.getCurrentFrame(), player.getPosition().x, player.getPosition().y);
for(Rectangle tree: trees){
batch.draw(Tree, tree.x, tree.y);
}
for(Rectangle raindrop: raindrops) {
batch.draw(dropImage, raindrop.x, raindrop.y);
}
batch.end();
}
@Override
public void resize(int width, int height) {
// camera.resize();
}
@Override
public void pause() {
}
@Override
public void resume() {
}
}
的Manifest.xml：
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.AustinMagnuson.FallingFlame"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="15"
android:targetSdkVersion="15" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
</application>
（Android项目，其主要活动包括Java（转换为Android）项目）
MainActivity.Java：
package com.AustinMagnuson.mygdxgame;
import android.os.Bundle;
import com.badlogic.gdx.backends.android.AndroidApplication;
import com.badlogic.gdx.backends.android.AndroidApplicationConfiguration;
public class MainActivity extends AndroidApplication {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
AndroidApplicationConfiguration cfg = new AndroidApplicationConfiguration();
cfg.useGL20 = true;
cfg.useAccelerometer = false;
cfg.useCompass = false;
initialize(new FallingFlame(), cfg);
}
}
的Manifest.xml：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.AustinMagnuson.mygdxgame"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="15" android:targetSdkVersion="15" />
<application
android:icon="@drawable/ff_launcher"
android:label="FireBud" >
<activity
android:name=".MainActivity"
android:label="FireBud"
android:screenOrientation="landscape"
android:configChanges="keyboard|keyboardHidden|orientation|screenSize">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
答案 0 :(得分：0)
检查清单文件 在第一个清单中：
package="com.AustinMagnuson.FallingFlame"
但在FallingFlame.java档案中
package com.AustinMagnuson.mygdxgame;