我正在关注Android游戏编程傻瓜:Derek James。它看起来也过时了,因为在书中它不包含fragment_main。所以我只是复制了fragment_main并将其替换为activity_main并删除了fragment_main(我按照如何摆脱此论坛上的fragment_main教程)。
我正试图在书中打出鼹鼠的游戏。
无论如何,当我按照这本书时,我遇到两个错误,它说我现在可以运行该程序,但我无法做到这一点,因为:
背景无法解析或不是字段
标题无法解析或不是字段
我的所有内容都和书一样,但为什么我会收到这些错误,我在Google上查了一下答案或类似的东西,但我找不到错误,如果有人可以帮我解决,我真的很感激。很抱歉写了一整段,但我应该告诉你我做了什么。
这是我的WhackAMoleView.java
package com.whackamole;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class WhackAMoleView extends SurfaceView implements
SurfaceHolder.Callback {
private Context myContext;
private SurfaceHolder mySurfaceHolder;
private Bitmap backgroundImg;
private int screenW = 1;
private int screenH = 1;
private boolean running = false;
private boolean onTitle = true;
private WhackAMoleThread thread;
public WhackAMoleView(Context context, AttributeSet attrs) {
super(context, attrs);
SurfaceHolder holder = getHolder();
holder.addCallback(this);
thread = new WhackAMoleThread(holder, context, new Handler()
{
@Override
public void handleMessage(Message m) {
}
});
setFocusable(true);
}
public WhackAMoleThread getThread() {
return thread;
}
class WhackAMoleThread extends Thread {
public WhackAMoleThread(SurfaceHolder surfaceHolder, Context context,
Handler handler) {
mySurfaceHolder = surfaceHolder;
myContext = context;
backgroundImg = BitmapFactory.decodeResource(
context.getResources(), R.drawable.title);
}
@Override
public void run() {
while (running) {
Canvas c = null;
try {
c = mySurfaceHolder.lockCanvas(null);
synchronized (mySurfaceHolder) {
draw(c);
}
} finally {
if (c != null) {
mySurfaceHolderunlockCanvasAndPost(c);
}
}
}
}
private void mySurfaceHolderunlockCanvasAndPost(Canvas c) {
// TODO Auto-generated method stub
}
private void draw(Canvas canvas) {
try {
canvas.drawBitmap(backgroundImg, 0, 0, null);
} catch (Exception e) {
}
}
boolean doTouchEvent(MotionEvent event) {
synchronized (mySurfaceHolder) {
int eventaction = event.getAction();
int x = (int) event.getX();
int Y = (int) event.getY();
switch (eventaction) {
case MotionEvent.ACTION_DOWN:
break;
case MotionEvent.ACTION_MOVE:
break;
case MotionEvent.ACTION_UP:
if (onTitle) {
backgroundImg = BitmapFactory
.decodeResource(myContext.getResources(),
R.drawable.background);
backgroundImg = Bitmap.createScaledBitmap(
backgroundImg, screenW, screenH, true);
onTitle = false;
}
break;
}
}
return true;
}
public void setSurfaceSize(int width, int height) {
synchronized (mySurfaceHolder) {
screenW = width;
screenH = height;
backgroundImg = Bitmap.createScaledBitmap(backgroundImg, width,
height, true);
}
}
public void setRunning(boolean b) {
running = b;
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
return thread.doTouchEvent(event);
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
thread.setSurfaceSize(width, height);
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
thread.setRunning(true);
if (thread.getState() == Thread.State.NEW) {
thread.start();
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
thread.setRunning(false);
}
}
这是我的MainActivity.java
package com.whackamole;
import android.app.Activity;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;
public class MainActivity extends Activity {
private WhackAMoleView myWhackAMoleView;
/**Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags
(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.whackamole_layout);
myWhackAMoleView = (WhackAMoleView)
findViewById(R.id.mole);
myWhackAMoleView.setKeepScreenOn(true);
}
}
这是我的AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.whackamole"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name">
<activity
android:name="com.whackamole.MainActivity"
android:screenOrientation="landscape"
android:configChanges="keyboardHidden|orientation"
android:label="@string/app_name" >
<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:-2)
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