嗨，我对Android编程比较陌生，但我会感激一些帮助：）
我正在尝试创建一个“浮动”在主活动视图上方的工具栏。该代码实现了一个SurfaceView，用于将项目绘制到其上。在过去的几天里，我一直遇到一些困难，无法让应用程序运行，因为它保持fc！ Logcat输出以下错误：
logcat的
02-06 13:19:23.985: E/AndroidRuntime(471): FATAL EXCEPTION: main
02-06 13:19:23.985: E/AndroidRuntime(471): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.odhranlynch.interiordesigner/com.odhranlynch.interiordesigner.NewProduct} android.view.InflateException: Binary XML file line #6: Error inflating class com.odhranlynch.interiordesigner.Panel
02-06 13:19:23.985: E/AndroidRuntime(471): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651)
02-06 13:19:23.985: E/AndroidRuntime(471): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
02-06 13:19:23.985: E/AndroidRuntime(471): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
02-06 13:19:23.985: E/AndroidRuntime(471): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
02-06 13:19:23.985: E/AndroidRuntime(471): at android.os.Handler.dispatchMessage(Handler.java:99)
02-06 13:19:23.985: E/AndroidRuntime(471): at android.os.Looper.loop(Looper.java:123)
02-06 13:19:23.985: E/AndroidRuntime(471): at android.app.ActivityThread.main(ActivityThread.java:3691)
02-06 13:19:23.985: E/AndroidRuntime(471): at java.lang.reflect.Method.invokeNative(Native Method)
02-06 13:19:23.985: E/AndroidRuntime(471): at java.lang.reflect.Method.invoke(Method.java:507)
02-06 13:19:23.985: E/AndroidRuntime(471): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:847)
02-06 13:19:23.985: E/AndroidRuntime(471): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605)
02-06 13:19:23.985: E/AndroidRuntime(471): at dalvik.system.NativeStart.main(Native Method)
02-06 13:19:23.985: E/AndroidRuntime(471): Caused by: android.view.InflateException: Binary XML file line #6: Error inflating class com.odhranlynch.interiordesigner.Panel
02-06 13:19:23.985: E/AndroidRuntime(471): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:581)
02-06 13:19:23.985: E/AndroidRuntime(471): at android.view.LayoutInflater.rInflate(LayoutInflater.java:623)
02-06 13:19:23.985: E/AndroidRuntime(471): at android.view.LayoutInflater.inflate(LayoutInflater.java:408)
02-06 13:19:23.985: E/AndroidRuntime(471): at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
02-06 13:19:23.985: E/AndroidRuntime(471): at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
02-06 13:19:23.985: E/AndroidRuntime(471): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:207)
02-06 13:19:23.985: E/AndroidRuntime(471): at android.app.Activity.setContentView(Activity.java:1663)
02-06 13:19:23.985: E/AndroidRuntime(471): at com.odhranlynch.interiordesigner.NewProduct.onCreate(NewProduct.java:34)
02-06 13:19:23.985: E/AndroidRuntime(471): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
02-06 13:19:23.985: E/AndroidRuntime(471): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615)
02-06 13:19:23.985: E/AndroidRuntime(471): ... 11 more
02-06 13:19:23.985: E/AndroidRuntime(471): Caused by: java.lang.ClassNotFoundException: com.odhranlynch.interiordesigner.Panel in loader dalvik.system.PathClassLoader[/data/app/com.odhranlynch.interiordesigner-1.apk]
02-06 13:19:23.985: E/AndroidRuntime(471): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
02-06 13:19:23.985: E/AndroidRuntime(471): at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
02-06 13:19:23.985: E/AndroidRuntime(471): at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
02-06 13:19:23.985: E/AndroidRuntime(471): at android.view.LayoutInflater.createView(LayoutInflater.java:471)
02-06 13:19:23.985: E/AndroidRuntime(471): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:570)
02-06 13:19:23.985: E/AndroidRuntime(471): ... 20 more
我正在使用相对布局，因为我可以将工具栏“捕捉”到底部。 .xml文件如下所示：
new_product.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<com.odhranlynch.interiordesigner.Panel
android:id="@+id/Panel"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentTop="true" />
<Button android:id="@+id/cut"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Cutout"
android:layout_alignParentBottom="true" />
</RelativeLayout>
NewProduct.java
package com.odhranlynch.interiordesigner;
import java.util.ArrayList;
import com.odhranlynch.interiordesigner.NewProduct.GraphicObject.Coordinates;
import com.odhranlynch.interiordesigner.R;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Region;
import android.os.Bundle;
import android.text.Layout;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
public class NewProduct extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.new_product);
}
public class Panel extends SurfaceView implements SurfaceHolder.Callback {
private drawThread _thread;
private ArrayList<GraphicObject> _graphics = new ArrayList<GraphicObject>();
public Panel(Context context, AttributeSet attributes) {
super(context, attributes);
getHolder().addCallback(this);
setFocusable(true);
_thread = new drawThread(getHolder(), this);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
synchronized (_thread.getSurfaceHolder()) {
if (event.getAction() == MotionEvent.ACTION_UP) {
GraphicObject graphic = new GraphicObject(BitmapFactory.decodeResource(getResources(), R.drawable.circle_point));
graphic.getCoordinates().setX((int) event.getX() - graphic.getGraphic().getWidth() / 2);
graphic.getCoordinates().setY((int) event.getY() - graphic.getGraphic().getHeight() / 2);
_graphics.add(graphic);
}
return true;
}
}
@Override
public void onDraw(Canvas canvas) {
Paint paint = new Paint();
canvas.drawColor(Color.YELLOW);
Bitmap b = Bitmap.createBitmap(200, 200,
Bitmap.Config.ARGB_8888);
paint.setFilterBitmap(true);
Bitmap bitmapOrg = BitmapFactory.decodeResource(getResources(),R.drawable.glass_lamp);
canvas.drawBitmap(bitmapOrg, 0, 0, paint);
Bitmap bitmap;
Coordinates coords;
for (GraphicObject graphic : _graphics) {
bitmap = graphic.getGraphic();
coords = graphic.getCoordinates();
canvas.drawBitmap(bitmap, coords.getX(), coords.getY(), null);
}
int width, height;
Canvas c = new Canvas(b);
paint.setAlpha(255); //0x80
c.translate(0, 30);
c.drawBitmap(bitmapOrg, new Matrix(), paint);
paint.setColor(Color.BLUE);
//Create shape using Path
Path mPath = new Path();
mPath.moveTo(20, 20);
mPath.lineTo(100, 200);
mPath.lineTo(400, 600);
mPath.lineTo(240, 155);
mPath.lineTo(250, 175);
mPath.lineTo(20, 20);
mPath.close();
//Cut out a hole
canvas.clipPath(mPath, Region.Op.XOR);
//Fill around cut-out with opaque white
//canvas.drawARGB(200, 255, 0, 0);
//Restore full canvas clip for any subsequent operations
//canvas.clipPath(mPath, Region.Op.REPLACE);
//int h = bitmapOrg.getHeight();
//canvas.drawBitmap(bitmapOrg, 10, 10, paint);
//canvas.drawBitmap(b, 0, 10 + h + 10, paint);
}
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
//TODO something
}
public void surfaceCreated(SurfaceHolder holder) {
_thread.setRunning(true);
_thread.start();
}
public void surfaceDestroyed(SurfaceHolder holder) {
// simply copied from sample application LunarLander:
// we have to tell thread to shut down & wait for it to finish, or else
// it might touch the Surface after we return and explode
boolean retry = true;
_thread.setRunning(false);
while (retry) {
try {
_thread.join();
retry = false;
} catch (InterruptedException e) {
// we will try it again and again...
}
}
}
}
class drawThread extends Thread {
private SurfaceHolder _surfaceHolder;
private Panel _panel;
private boolean _run = false;
public drawThread(SurfaceHolder surfaceHolder, Panel panel) {
_surfaceHolder = surfaceHolder;
_panel = panel;
}
public void setRunning(boolean run) {
_run = run;
}
public SurfaceHolder getSurfaceHolder() {
return _surfaceHolder;
}
public void run() {
Canvas c;
while (_run) {
c = null;
try {
c = _surfaceHolder.lockCanvas(null);
synchronized (_surfaceHolder) {
_panel.onDraw(c);
}
} finally {
// do this in a finally so that if an exception is thrown
// during the above, we don't leave the Surface in an
// inconsistent state
if (c != null) {
_surfaceHolder.unlockCanvasAndPost(c);
}
}
}
}
}
class GraphicObject {
private Bitmap _bitmap;
private Coordinates _coordinates;
public GraphicObject(Bitmap bitmap) {
_bitmap = bitmap;
_coordinates = new Coordinates();
}
public Bitmap getGraphic() {
return _bitmap;
}
public Coordinates getCoordinates() {
return _coordinates;
}
/**
* Contains the coordinates of the graphic.
*/
public class Coordinates {
private int _x = 100;
private int _y = 0;
public int getX() {
return _x + _bitmap.getWidth() / 2;
}
public void setX(int value) {
_x = value - _bitmap.getWidth() / 2;
}
public int getY() {
return _y + _bitmap.getHeight() / 2;
}
public void setY(int value) {
_y = value - _bitmap.getHeight() / 2;
}
public String toString() {
return "Coordinates: (" + _x + "/" + _y + ")";
}
}
}
}
答案 0 :(得分：1)
只需将iternal类Panel，drawThread和GraphicObject移动到单独的文件中即可。这将修复java.lang.ClassNotFoundException，从而解决其他问题。
希望这会有所帮助：）
答案 1 :(得分：0)
如果您在NewProduct.Panel文件中添加<com.odhranlynch.interiordesigner.Panel android:id="@+id/Panel" ... />元素时表示new_product.xml课程，那就错了。
您需要将此课程移至单独的文件，即com/odhranlynch/interiordesigner/Panel.java