问题
I want to create a program, that open documents without external app. I need this, because i want to scroll the document with the phones orientation(Pitch and Roll). I create a button on the bottom of the screen, and when i hold down the button, i can scroll the document too. If i release the button, i can\'t scroll it. So, if i open the document with external app, my button disappears, and the sensorManager works neither.
Have someone any idea to solve this problem. Or have someone any idea, how to scroll the document, opened in an external app, with my phones orientation?
(Sorry for my English)
This is my manifest:
<?xml version=\"1.0\" encoding=\"utf-8\"?>
<manifest xmlns:android=\"http://schemas.android.com/apk/res/android\"
package=\"com.example.orientationscrolling\"
android:versionCode=\"1\"
android:versionName=\"1.0\" >
<uses-sdk
android:minSdkVersion=\"8\"
android:targetSdkVersion=\"17\" />
<uses-permission android:name=\"android.permission.INTERNET\" />
<application
android:allowBackup=\"true\"
android:icon=\"@drawable/ic_launcher\"
android:label=\"@string/app_name\"
android:theme=\"@style/AppTheme\" >
<activity
android:name=\"com.example.orientationscrolling.MainActivity\"
android:label=\"@string/app_name\" >
<intent-filter>
<action android:name=\"android.intent.action.MAIN\" />
<category android:name=\"android.intent.category.LAUNCHER\" />
</intent-filter>
</activity>
</application>
</manifest>
This is my Layout:
<RelativeLayout 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\" >
<WebView
xmlns:android=\"http://schemas.android.com/apk/res/android\"
android:id=\"@+id/webView1\"
android:layout_width=\"match_parent\"
android:layout_height=\"match_parent\" />
<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:gravity=\"bottom\"
android:orientation=\"vertical\" >
<Button
android:id=\"@+id/mybutt\"
android:layout_width=\"wrap_content\"
android:layout_height=\"wrap_content\"
android:textSize=\"25sp\"
android:text=\"Scroll!!\"
android:layout_gravity=\"right\"/>
</LinearLayout>
This is my Code:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
button = (Button) findViewById( R.id.mybutt );
String pdf = \"http://www.pc-hardware.hu/PDF/konfig.pdf\";
String doc=\"<iframe src=\'http://docs.google.com/gview?embedded=true&url=http://www.pc-hardware.hu/PDF/konfig.pdf\' width=\'100%\' height=\'100%\' style=\'border: none;\'></iframe>\";
webView = (WebView) findViewById(R.id.webView1);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setPluginsEnabled(true);
webView.getSettings().setAllowFileAccess(true);
webView.loadData( doc , \"text/html\", \"UTF-8\");
}
回答1:
I think you should use custom library for getting that done .See this and this
But there is a way for displaying PDF with out calling another application
This is a way for showing PDF in android app that is embedding the PDF document to android webview using support from http://docs.google.com/viewer
pseudo
String doc="<iframe src='http://docs.google.com/viewer?url=+location to your PDF File+'
width='100%' height='100%'
style='border: none;'></iframe>";
a sample is is shown below
String doc="<iframe src='http://docs.google.com/viewer?url=http://www.iasted.org/conferences/formatting/presentations-tips.ppt&embedded=true'
width='100%' height='100%'
style='border: none;'></iframe>";
Code
WebView wv = (WebView)findViewById(R.id.webView);
wv.getSettings().setJavaScriptEnabled(true);
wv.getSettings().setPluginsEnabled(true);
wv.getSettings().setAllowFileAccess(true);
wv.loadUrl(doc);
//wv.loadData( doc, "text/html", "UTF-8");
and in manifest provide
<uses-permission android:name="android.permission.INTERNET"/>
See this
Caution : I am not aware of compatibility issues with various android versions
In this approach the drawback is you need internet connectivity . But i think it satisfy your need
EDIT Try this as src for iframe
src="http://docs.google.com/gview?embedded=true&url=http://www.pc-hardware.hu/PDF/konfig.pdf"
try wv.loadData( doc , "text/html", "UTF-8"); . Both works for me
回答2:
Download the source code from here (Display PDF file inside my android application)
Add this dependency in your Grade:
compile 'com.github.barteksc:android-pdf-viewer:2.0.3'
activity_main.xml
<RelativeLayout android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
xmlns:android="http://schemas.android.com/apk/res/android" >
<TextView
android:layout_width="match_parent"
android:layout_height="40dp"
android:background="@color/colorPrimaryDark"
android:text="View PDF"
android:textColor="#ffffff"
android:id="@+id/tv_header"
android:textSize="18dp"
android:gravity="center"></TextView>
<com.github.barteksc.pdfviewer.PDFView
android:id="@+id/pdfView"
android:layout_below="@+id/tv_header"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</RelativeLayout>
MainActivity.java
package pdfviewer.pdfviewer;
import android.app.Activity;
import android.database.Cursor;
import android.net.Uri;
import android.provider.OpenableColumns;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import com.github.barteksc.pdfviewer.PDFView;
import com.github.barteksc.pdfviewer.listener.OnLoadCompleteListener;
import com.github.barteksc.pdfviewer.listener.OnPageChangeListener;
import com.github.barteksc.pdfviewer.scroll.DefaultScrollHandle;
import com.shockwave.pdfium.PdfDocument;
import java.util.List;
public class MainActivity extends Activity implements OnPageChangeListener,OnLoadCompleteListener{
private static final String TAG = MainActivity.class.getSimpleName();
public static final String SAMPLE_FILE = "android_tutorial.pdf";
PDFView pdfView;
Integer pageNumber = 0;
String pdfFileName;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pdfView= (PDFView)findViewById(R.id.pdfView);
displayFromAsset(SAMPLE_FILE);
}
private void displayFromAsset(String assetFileName) {
pdfFileName = assetFileName;
pdfView.fromAsset(SAMPLE_FILE)
.defaultPage(pageNumber)
.enableSwipe(true)
.swipeHorizontal(false)
.onPageChange(this)
.enableAnnotationRendering(true)
.onLoad(this)
.scrollHandle(new DefaultScrollHandle(this))
.load();
}
@Override
public void onPageChanged(int page, int pageCount) {
pageNumber = page;
setTitle(String.format("%s %s / %s", pdfFileName, page + 1, pageCount));
}
@Override
public void loadComplete(int nbPages) {
PdfDocument.Meta meta = pdfView.getDocumentMeta();
printBookmarksTree(pdfView.getTableOfContents(), "-");
}
public void printBookmarksTree(List<PdfDocument.Bookmark> tree, String sep) {
for (PdfDocument.Bookmark b : tree) {
Log.e(TAG, String.format("%s %s, p %d", sep, b.getTitle(), b.getPageIdx()));
if (b.hasChildren()) {
printBookmarksTree(b.getChildren(), sep + "-");
}
}
}
}
Thanks!
回答3:
Above answers that are dependent on google docs will work only when you have internet connection. A better option would be to use Android PdfRenderer class.
You can try sample app here.
回答4:
Well, I think below is the solution
String doc="<iframe src='http://docs.google.com/viewer?url=http://www.example.com/yourfile.pdf&embedded=true' width='100%' height='100%' style='border: none;'></iframe>";
WebView wv = (WebView)findViewById(R.id.wv);
wv.setVisibility(WebView.VISIBLE);
wv.getSettings().setJavaScriptEnabled(true);
wv.getSettings().setAllowFileAccess(true);
wv.getSettings().setPluginState(WebSettings.PluginState.ON);
wv.setWebViewClient(new Callback());
wv.loadData(doc, "text/html", "UTF-8");
Hoping this will help you :)
来源：https://stackoverflow.com/questions/14578530/how-to-open-display-documents-pdf-doc-without-external-app