ScrollBar
和 import com.github.barteksc.pdfviewer.ScrollBar;
不起作用
此外,当我在设备上运行然后点击我想查看的 pdf 时,应用程序崩溃了。
请问有人可以帮助我吗?
我对编程很陌生 错误让我无法休眠
以下是代码:
import com.example.mcphil.avastus.R;
import com.github.barteksc.pdfviewer.ScrollBar;
import com.github.barteksc.pdfviewer.PDFView;
import com.github.barteksc.pdfviewer.listener.OnLoadCompleteListener;
import java.io.File;
public class PDF_Activity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_pdf_);
//PDFVIEW SHALL DISPLAY OUR PDFS
PDFView pdfView= (PDFView) findViewById(R.id.pdfView);
//SCROLLBAR TO ENABLE SCROLLING
ScrollBar scrollBar1 = (ScrollBar) findViewById(R.id.scrollBar);
pdfView.setScrollBar(scrollBar1);
//VERTICAL SCROLLING
scrollBar1.setHorizontal(false);
//SACRIFICE MEMORY FOR QUALITY
pdfView.useBestQuality(true)
//UNPACK OUR DATA FROM INTENT
Intent i=this.getIntent();
String path=i.getExtras().getString("PATH");
//GET THE PDF FILE
File file=new File(path);
if(file.canRead())
{
//LOAD IT
pdfView.fromFile(file).defaultPage(1).onLoad(new OnLoadCompleteListener() {
@Override
public void loadComplete(int nbPages) {
Toast.makeText(PDF_Activity.this, String.valueOf(nbPages), Toast.LENGTH_LONG).show();
}
}).load();
}
}
}
如何将上面的代码与此代码连接起来?
import java.io.File;
import java.util.ArrayList;
public class DocumentActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_document);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
final ListView lv= (ListView) findViewById(R.id.lv);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
lv.setAdapter(new CustomAdapter(DocumentActivity.this,getPDFs()));
}
});
}
private ArrayList<PDFDoc> getPDFs()
{
ArrayList<PDFDoc> pdfDocs=new ArrayList<>();
//TARGET FOLDER
File downloadsFolder= Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
//may results crash
File documentsFolder= Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS);
PDFDoc pdfDoc,pdfDoc2;
if(downloadsFolder.exists())
{
//GET ALL FILES IN DOWNLOAD FOLDER
File[] files=downloadsFolder.listFiles();
//LOOP THRU THOSE FILES GETTING NAME AND URI
for (int i = 0; i < files.length; i++) {
File file = files[i];
if (file.getPath().endsWith("pdf")) {
pdfDoc = new PDFDoc();
pdfDoc.setName(file.getName());
pdfDoc.setPath(file.getAbsolutePath());
pdfDocs.add(pdfDoc);
}
}
}
// may result crash
if(documentsFolder.exists())
{
//GET ALL FILES IN DOWNLOAD FOLDER
File[] files2=documentsFolder.listFiles();
//LOOP THRU THOSE FILES GETTING NAME AND URI
for(int i = 0; i < files2.length; i++) {
File file = files2[i];
if (file.getPath().endsWith("pdf")) {
pdfDoc2 = new PDFDoc();
pdfDoc2.setName(file.getName());
pdfDoc2.setPath(file.getAbsolutePath());
pdfDocs.add(pdfDoc2);
}
}
}
return pdfDocs;
}
}
感谢您的帮助!我很匆忙 T.T
最佳答案
在 Github “AndroidPdfViewerV1/android-pdf-viewer/src/main/java/com/github/barteksc/pdfviewer/ScrollBar.java”
解决了这个错误
关于java - 滚动条并导入 com.github.barteksc.pdfviewer.ScrollBar;是错误,PDF 查看器也会崩溃,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/48414816/