Android:崩溃:二进制 XML 文件行:错误膨胀类(使用 SurfaceView) [英] Android:Crash: Binary XML file line : Error inflating class (using SurfaceView)
本文介绍了Android:崩溃:二进制 XML 文件行:错误膨胀类(使用 SurfaceView)的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有 android surfaceView 并且我正在尝试为此添加按钮.在surfaceView画布中我画了一些东西.而且我有一个线程类可以继续绘图.
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);
}
}
}
);
线程类
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);
}
}
}
}
}
surfaceView &绘图类
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;
}
}
}
}
这是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:如果我没有 "MySurfaceView" 作为嵌套类，上面的代码仅有效.但是使用外部类 "test" 我收到以下错误.如果我删除课堂测试"它工作正常.
PROBLEM: The above code works ONLY if I don't 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)
任何帮助都会很棒......我坚持这个.
Any help will be great ...I'm stuck with this.
推荐答案
首先，您必须将您的视图声明为 static 类型，以便能够在没有持有实例的情况下对其进行膨胀课程可用:
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
线
<com.androidsurfaceview.test.MySurfaceView
在您的布局 xml 中，MySurfaceView 类位于 com.androidsurfaceview.test 包内，并试图从那里扩展它，这是错误的.
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.
在您的布局中，您应该遵循 package.class$innerclass 声明形式.
In your layout you should follow the package.class$innerclass form of declaration.
BUT 由于 "$" 是非法字符，你不能写
BUT since the "$" is illegal character, you cannot write
<com.androidsurfaceview.test$MySurfaceView
因此您必须在布局 xml 中指定您的视图，如下所示:
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"/>
这样就行了.
这篇关于Android:崩溃:二进制 XML 文件行:错误膨胀类(使用 SurfaceView)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
