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내가 문제 깊은 GestureDetector 클래스 내부에서 내 Activity에 부착 된 WebView에 loadUrl() 전화가 있어요,하지만 난 메시지를 전달하는 방법을 모르는에 웹보기에.합격 메시지 (loadUrl) GestureDetector에서 안드로이드
기본적으로 무슨 일이 발생하는지는 onFling 콜백에 있으며 loadUrl()을 원하지만 통화가 작동하지 않습니다. 내 응용 프로그램은 완벽하게로드되어 첫 페이지를 표시하지만 플링 이벤트가 발생하면 토스터가 정상적으로 표시되지만 새 페이지가로드되지 않습니다.
모든 도움을 주시면 대단히 감사하겠습니다.
package com.szuhanchang.friar;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;
public class Friar extends Activity {
final String BASE_URL = "file:///android_asset/book/";
final String MIME_TYPE = "text/html";
final String ENCODING = "utf-8";
FriarWebView webView;
List<String> htmlFiles;
int currentPage = 0;
int totalPages = 0;
GestureDetector gestureDetector;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
System.out.println("onCreate!");
super.onCreate(savedInstanceState);
htmlFiles = loadBook();
totalPages = htmlFiles.size();
webView = new FriarWebView(this);
setContentView(webView);
webView.setWebViewClient(new FriarWebViewClient());
final WebSettings settings = webView.getSettings();
settings.setJavaScriptEnabled(false);
webView.loadUrl(BASE_URL + htmlFiles.get(currentPage));
System.out.println(BASE_URL + htmlFiles.get(currentPage));
}
// Handle Android physical back button.
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) {
webView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
return super.onTouchEvent(event);
}
private List<String> loadBook() {
List<String> htmlFiles = new ArrayList<String>();
try {
String[] files = getAssets().list("book");
for (String file : files) {
if (file.endsWith(".html")) {
htmlFiles.add(file);
}
}
} catch (IOException e) {
e.printStackTrace();
}
Collections.sort(htmlFiles, new AlphanumComparator());
return htmlFiles;
}
public WebView getWebView() {
return webView;
}
class FriarWebView extends WebView {
Context context;
GestureDetector gd;
public FriarWebView(Context context) {
super(context);
this.context = context;
FriarGestureDetector fgd = new FriarGestureDetector();
gd = new GestureDetector(context, fgd);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
return gd.onTouchEvent(event) || super.onTouchEvent(event);
}
class FriarGestureDetector extends GestureDetector.SimpleOnGestureListener {
private int swipe_Min_Distance = 100;
private int swipe_Max_Distance = 350;
private int swipe_Min_Velocity = 100;
private void show_toast(final String text) {
Toast t = Toast.makeText(context, text, Toast.LENGTH_SHORT);
t.show();
System.out.println(text);
}
private void showUrl(int pageNum) {
assert pageNum >= 0 && pageNum < totalPages;
String filename = htmlFiles.get(pageNum);
String url = BASE_URL + filename;
getWebView().loadUrl(url);
getWebView().reload();
show_toast(url + ", " + currentPage);
}
@Override
public boolean onDown(MotionEvent event) {
return false;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
final float xDistance = Math.abs(e1.getX() - e2.getX());
final float yDistance = Math.abs(e1.getY() - e2.getY());
if (xDistance > this.swipe_Max_Distance || yDistance > this.swipe_Max_Distance) {
return false;
}
velocityX = Math.abs(velocityX);
velocityY = Math.abs(velocityY);
if (velocityX > this.swipe_Min_Velocity && xDistance > this.swipe_Min_Distance) {
if (e1.getX() > e2.getX()) { // right to left
show_toast("Swipe Left");
if (currentPage + 1 > totalPages) {
show_toast("This is the last page of the book.");
}
else {
showUrl(++currentPage);
}
}
else {
show_toast("Swipe Right");
if (currentPage - 1 < 0) {
show_toast("This is the first page of the book.");
}
else {
showUrl(--currentPage);
}
}
setContentView(webView);
return true;
}
return false;
}
}
}
class FriarWebViewClient extends WebViewClient {
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
try {
URI uri = new URI(url);
String[] segments = uri.getPath().split("/");
String filename = segments[segments.length - 1];
if (filename.contains("-")) {
currentPage = Integer.parseInt(filename.substring(0, filename.indexOf("-")));
} else {
currentPage = Integer.parseInt(filename.substring(0, filename.indexOf(".")));
}
} catch (URISyntaxException e) {
e.printStackTrace();
}
System.out.println(currentPage + " " + url);
}
}
}