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我試圖使用webView來顯示設備上的HTML文件,而不是互聯網。我在/下載文件夾中有我的html文件。當我啓動應用程序,我得到以下錯誤:WebView =網頁不可用
網頁無法
該網頁的文件:///storage/sdcard0/Download/manuals/test/index4.html可能暫時,或者它已被永久移至新的網址。
我知道文件存在,但不會顯示它。
這裏是我的代碼:
package com.asstechmanuals.techmanual;
import java.io.File;
import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.Window;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class MainActivity extends Activity {
private WebView mWebView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mWebView = (WebView) findViewById(R.id.webview);
mWebView.getSettings().setJavaScriptEnabled(true);
File fileStandard = new File("/storage/sdcard0/Download/manuals/test/index4.html");
File fileNewStandard = new File("/storage/sdcard0/Download/manuals/test/index4.html");
File fileKitKat = new File("/storage/sdcard0/Download/manuals/test/index4.html");
if(fileStandard.exists())
mWebView.loadUrl("file:///storage/sdcard0/Download/manuals/test/index4.html");
else if(fileNewStandard.exists())
mWebView.loadUrl("file:///storage/sdcard0/Download/manuals/test/index4.html");
else if(fileKitKat.exists())
mWebView.loadUrl("file:///storage/sdcard0/Download/manuals/test/index4.html");
else
mWebView.loadUrl("file:///storage/sdcard0/Download/manuals/test/index4.html");
mWebView.setWebViewClient(new vwClient());
}
private class vwClient extends WebViewClient{
@Override
public boolean shouldOverrideUrlLoading(WebView webview, String url)
{
webview.loadUrl(url);
if (url.toLowerCase().contains(".pdf"))
{
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse(url), "application/pdf");
startActivity(intent);
}
return true;
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack())
{
mWebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
可能重複(http://stackoverflow.com/questions/6160165/web-page-not-available-error) –