我知道您之前已经看过这个问题。我知道我有:-)。但是,结合我发现的所有答案,我仍然会遇到虚假的类错误。我的布局具有扩展的webView,因为我希望能够左右滑动以加载上一个和下一个html页面。我包括了整个布局,因为我发现我找到的大多数答案都以某种抽象的方式提出了一种解决方案,该解决方案只处理webView,而不是作为大图的一部分。希望当这个答案得到回答时,也将帮助其他人获得更大的前景。
底部的滚动视图将包含按钮,作为浏览html页面的另一种方法。视图imageView2将包含一个透明的标头,部分遮盖了基本的webView。textView helloText将显示章节标题。我已经完成了所有这些工作,直到不得不扩展webView来处理左右滑动。
这是布局xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >
<RelativeLayout
android:id="@+id/relativeLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.8"
android:orientation="vertical" >
<com.example.test.MyWebView
android:id="@+id/webView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" />
<View
android:id="@+id/imageView2"
android:layout_width="fill_parent"
android:layout_height="50dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:background="#88FF0000"/>
</RelativeLayout>
<TextView
android:id="@+id/helloText"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.05"
android:gravity="center_horizontal"
android:text="Hello World" />
<HorizontalScrollView
android:id="@+id/horizontalScrollView1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.15"
android:background="#0000FF" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<Button
android:id="@+id/button1"
android:layout_width="110dp"
android:layout_height="45dp"
android:background="#00FF00" />
</LinearLayout>
</HorizontalScrollView>
</LinearLayout>
这是代码:
package com.example.test;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.GestureDetector;
import android.view.Menu;
import android.view.MotionEvent;
import android.webkit.WebView;
import android.widget.Toast;
public class MainActivity extends Activity {
int currentPage = 2; // page number for current html file
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//get a pointer to the webview
MyWebView webview = (MyWebView) findViewById(R.id.webView1);
webview.getSettings().setUseWideViewPort(true);
webview.getSettings().setSupportZoom(true);
webview.getSettings().setBuiltInZoomControls(true);
// put html page in the webView
webview.loadUrl("file:///android_asset/chapter" + currentPage + ".html");
}
public void changePage(int page) {
Log.v("test", "change page to " + page);
//get a pointer to the webview
MyWebView webview = (MyWebView)findViewById(R.id.webView1);
// put html page in the webView
webview.loadUrl("file:///android_asset/chapter" + page + ".html");
}
class MyWebView extends WebView {
Context context;
GestureDetector gd;
public MyWebView(Context context, AttributeSet attrs) {
super(context, attrs);
this.context = context;
gd = new GestureDetector(context, sogl);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
return (gd.onTouchEvent(event)
|| super.onTouchEvent(event));
}
GestureDetector.SimpleOnGestureListener sogl = new GestureDetector.SimpleOnGestureListener() {
public boolean onDown(MotionEvent event) {
return false;
}
public boolean onFling(MotionEvent event1, MotionEvent event2, float velocityX, float velocityY) {
if (event1.getRawX() > event2.getRawX() && StrictMath.abs(event1.getRawY()-event2.getRawY())<100) {
show_toast("swipe left");
currentPage += 1;
if (currentPage >= 19) currentPage = 19;
changePage(currentPage);
} else if(event1.getRawX() < event2.getRawX() && StrictMath.abs(event1.getRawY()-event2.getRawY())<100){
show_toast("swipe right");
currentPage -= 1;
if (currentPage <= 1) currentPage = 1;
changePage(currentPage);
} else {
return false;
}
return true;
}
};
void show_toast(final String text) {
Toast t = Toast.makeText(context, text, Toast.LENGTH_SHORT);
t.show();
}
}
}
实际错误为:
java.lang.RuntimeException:无法启动活动ComponentInfo {com.example.test / com.example.test.MainActivity}:android.view.InflateException:二进制XML文件第15行:膨胀类com.example.test.MyWebView的错误
在此先感谢您的帮助。非常感激。
吉格斯先生
根据要求,完整的错误跟踪:
01-23 10:21:51.980: E/AndroidRuntime(29514): FATAL EXCEPTION: main
01-23 10:21:51.980: E/AndroidRuntime(29514): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.test/com.example.test.MainActivity}: android.view.InflateException: Binary XML file line #15: Error inflating class com.example.test.MyWebView
01-23 10:21:51.980: E/AndroidRuntime(29514): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2100)
01-23 10:21:51.980: E/AndroidRuntime(29514): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125)
01-23 10:21:51.980: E/AndroidRuntime(29514): at android.app.ActivityThread.access$600(ActivityThread.java:140)
01-23 10:21:51.980: E/AndroidRuntime(29514): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227)
01-23 10:21:51.980: E/AndroidRuntime(29514): at android.os.Handler.dispatchMessage(Handler.java:99)
01-23 10:21:51.980: E/AndroidRuntime(29514): at android.os.Looper.loop(Looper.java:137)
01-23 10:21:51.980: E/AndroidRuntime(29514): at android.app.ActivityThread.main(ActivityThread.java:4898)
01-23 10:21:51.980: E/AndroidRuntime(29514): at java.lang.reflect.Method.invokeNative(Native Method)
01-23 10:21:51.980: E/AndroidRuntime(29514): at java.lang.reflect.Method.invoke(Method.java:511)
01-23 10:21:51.980: E/AndroidRuntime(29514): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
01-23 10:21:51.980: E/AndroidRuntime(29514): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
01-23 10:21:51.980: E/AndroidRuntime(29514): at dalvik.system.NativeStart.main(Native Method)
01-23 10:21:51.980: E/AndroidRuntime(29514): Caused by: android.view.InflateException: Binary XML file line #15: Error inflating class com.example.test.MyWebView
01-23 10:21:51.980: E/AndroidRuntime(29514): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:698)
01-23 10:21:51.980: E/AndroidRuntime(29514): at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
01-23 10:21:51.980: E/AndroidRuntime(29514): at android.view.LayoutInflater.rInflate(LayoutInflater.java:749)
01-23 10:21:51.980: E/AndroidRuntime(29514): at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
01-23 10:21:51.980: E/AndroidRuntime(29514): at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
01-23 10:21:51.980: E/AndroidRuntime(29514): at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
01-23 10:21:51.980: E/AndroidRuntime(29514): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:308)
01-23 10:21:51.980: E/AndroidRuntime(29514): at android.app.Activity.setContentView(Activity.java:1924)
01-23 10:21:51.980: E/AndroidRuntime(29514): at com.example.test.MainActivity.onCreate(MainActivity.java:21)
01-23 10:21:51.980: E/AndroidRuntime(29514): at android.app.Activity.performCreate(Activity.java:5206)
01-23 10:21:51.980: E/AndroidRuntime(29514): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1083)
01-23 10:21:51.980: E/AndroidRuntime(29514): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2064)
01-23 10:21:51.980: E/AndroidRuntime(29514): ... 11 more
01-23 10:21:51.980: E/AndroidRuntime(29514): Caused by: java.lang.ClassNotFoundException: com.example.test.MyWebView
01-23 10:21:51.980: E/AndroidRuntime(29514): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
01-23 10:21:51.980: E/AndroidRuntime(29514): at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
01-23 10:21:51.980: E/AndroidRuntime(29514): at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
01-23 10:21:51.980: E/AndroidRuntime(29514): at android.view.LayoutInflater.createView(LayoutInflater.java:552)
01-23 10:21:51.980: E/AndroidRuntime(29514): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687)
01-23 10:21:51.980: E/AndroidRuntime(29514): ... 22 more
MyWebView
类是类的内部MainActivity
。充气机看不到此类。使您的WebView成为不同的.java文件。
您也可以尝试在布局文件中使用该名称<com.example.test.MainActivity.MyWebView/>
,但我不确定。
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