安卓：崩溃：二进制XML文件行：错误充气类（使用SurfaceView） [英] Android:Crash: Binary XML file line : Error inflating class (using SurfaceView)
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问题描述
我在安卓surfaceview并且在我试图按钮添加到这一点。 在surfaceview画布我画的东西。我有一个线程类，以保持图纸。
I'm having android surfaceview and in that i'm trying to add buttons to this. In the surfaceview canvas i draw something. And i have a thread class to keep drawing.
package com.androidsurfaceview;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class androidsurfaceview extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button buttonShowHide = (Button)findViewById(R.id.showhide);
final Button buttonDummy = (Button)findViewById(R.id.dummy);
buttonShowHide.setOnClickListener(
new Button.OnClickListener(){
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if(buttonDummy.getVisibility()==View.VISIBLE){
buttonDummy.setVisibility(View.GONE);
}
else{
buttonDummy.setVisibility(View.VISIBLE);
}
}
}
);
Thread类
The thread class
package com.androidsurfaceview;
import android.graphics.Canvas;
import android.view.SurfaceHolder;
public class MySurfaceThread extends Thread {
private SurfaceHolder myThreadSurfaceHolder;
private com.androidsurfaceview.test.MySurfaceView myThreadSurfaceView;
private boolean myThreadRun = false;
public MySurfaceThread(SurfaceHolder surfaceHolder, com.androidsurfaceview.test.MySurfaceView surfaceView) {
myThreadSurfaceHolder = surfaceHolder;
myThreadSurfaceView = surfaceView;
}
public void setRunning(boolean b) {
myThreadRun = b;
}
@Override
public void run() {
// TODO Auto-generated method stub
while(myThreadRun){
Canvas c = null;
try{
c = myThreadSurfaceHolder.lockCanvas(null);
synchronized (myThreadSurfaceHolder){
myThreadSurfaceView.onDraw(c);
}
sleep(100);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
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) {
myThreadSurfaceHolder.unlockCanvasAndPost(c);
}
}
}
}
}
在surfaceview和放大器;类绘制
The surfaceview & the class for drawing
package com.androidsurfaceview;
import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class test extends Activity{
// ......
// I do a few things here... with this class test.
public class MySurfaceView extends SurfaceView implements SurfaceHolder.Callback{
private MySurfaceThread thread;
private Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
int cx, cy, offx, offy;
public MySurfaceView(Context context) {
super(context);
// TODO Auto-generated constructor stub
init();
}
public MySurfaceView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
init();
}
public MySurfaceView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
init();
}
private void init(){
getHolder().addCallback(this);
thread = new MySurfaceThread(getHolder(), this);
setFocusable(true); // make sure we get key events
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(3);
paint.setColor(Color.WHITE);
cx = 0;
cy = 0;
offx = 10;
offy = 10;
}
@Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
thread.setRunning(true);
thread.start();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
boolean retry = true;
thread.setRunning(false);
while (retry) {
try {
thread.join();
retry = false;
}
catch (InterruptedException e) {
}
}
}
////Just a simple graphic of moving circle.
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
canvas.drawRGB(0, 0, 0);
canvas.drawCircle(cx, cy, 3, paint);
cx += offx;
if (cx > getWidth() || (cx < 0)){
offx *= -1;
cx += offx;
}
cy += offy;
if (cy > getHeight() || (cy < 0)){
offy *= -1;
cy += offy;
}
}
}
}
下面是main.xml中
Here is the main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button
android:id="@+id/showhide"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Toggle The Another Button Show/Hide" />
<Button
android:id="@+id/dummy"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="a Button" />
<FrameLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<com.androidsurfaceview.test.MySurfaceView
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
</FrameLayout>
</LinearLayout>
问题： 上述code ++工程的仅如果我没有在MySurfaceView作为嵌套类。但随着外部类的测试我碰到下面的错误。如果删除了级测试 它工作正常。
PROBLEM: The above code works ONLY if i dont have the "MySurfaceView" as nested class. but with the outer class "test" I get the following error. If i remove the "class test" it works fine.
错误/崩溃
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): FATAL EXCEPTION: main
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.androidsurfaceview/com.androidsurfaceview.androidsurfaceview}: **android.view.InflateException: Binary XML file line #20: Error inflating class com.androidsurfaceview.test.MySurfaceView**
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at android.os.Handler.dispatchMessage(Handler.java:99)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at android.os.Looper.loop(Looper.java:123)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at android.app.ActivityThread.main(ActivityThread.java:4627)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at java.lang.reflect.Method.invokeNative(Native Method)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at java.lang.reflect.Method.invoke(Method.java:521)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at dalvik.system.NativeStart.main(Native Method)
**04-29 11:43:18.977: ERROR/AndroidRuntime(21832): Caused by: android.view.InflateException: Binary XML file line #20: Error inflating class com.androidsurfaceview.test.MySurfaceView**
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:576)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at android.view.LayoutInflater.rInflate(LayoutInflater.java:621)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:200)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at android.app.Activity.setContentView(Activity.java:1647)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at com.androidsurfaceview.androidsurfaceview.onCreate(androidsurfaceview.java:13)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
04-29 11:43:18.977: ERROR/AndroidRuntime(21832): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
任何帮助将是巨大的......我坚持这一点。
Any help will be great ...I'm stuck with this.
推荐答案
首先，你必须声明你的观点作为静态键入，要能够进行甚至夸大它当控股no类的实例可用：
First, you must declare your view as a static type, to be able to be inflated it even when no instance of the holding class is available:
public static class MySurfaceView extends SurfaceView
implements SurfaceHolder.Callback
行
<com.androidsurfaceview.test.MySurfaceView
在布局XML表明，该 MySurfaceView 类是 com.androidsurfaceview.test 包里面，试图从那里吹它，这是不对的。
in your layout xml suggests, that the MySurfaceView class is inside the com.androidsurfaceview.test package, and tries to inflate it from there, which is wrong.
在你的布局应该遵循的 package.class $内部类的形式声明。
In your layout you should follow the package.class$innerclass form of declaration.
但，因为$是非法字符，你可以不写
BUT since the "$" is illegal character, you cannot write
<com.androidsurfaceview.test$MySurfaceView
所以你必须指定在布局XML观点如下：
so you must specify your view in the layout xml as follows:
<view class="com.androidsurfaceview.test$MySurfaceView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
此方式，它会工作。
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