android pdf 阅读器开发, pdf demo, pdf第三方控件

public class PDFActivity extends Activity implements OnPageChangeListener {

public static final String PDF_NAME = "xxx.pdf";// 书名
private PDFView pdfView;
private TextView pdf_tv_num;
private int bookPage = 1;

public final static String BOOKID = "bookId";

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_pdf);
pdfView = (PDFView) findViewById(R.id.pdfView);
pdf_tv_num = (TextView) findViewById(R.id.pdf_tv_num);

String bId = mCache.getAsString("pdfPage");// 获取上次读取的页数
if (!isNEB(bId)) {
bookPage = Integer.parseInt(bId);
}

String path = activity.getFilesDir().getAbsolutePath();// 获取路径
File file = new File(path, PDF_NAME);
if (file.exists()) {
pdfView.fromFile(file).defaultPage(bookPage).onPageChange(this)
.load();// 显示要看的第几页
}
}

public void onPageChanged(int page, int pageCount) {
bookPage = page;
pdf_tv_num.setText(page + "/" + pageCount);// page正在看的页数，pageCount总页数
}

@Override
protected void onStop() {
super.onStop();
// TODO 这里先保存的页数  bookPage

// 如果退出要删除pdf,执底下的代码，否则不需要
String path = activity.getFilesDir().getAbsolutePath();
File file = new File(path, PDF_NAME);
if (file.exists()) {
file.delete();
finish();
}
}

}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >

<com.joanzapata.pdfview.PDFView
android:id="@+id/pdfView"
android:layout_width="match_parent"
android:layout_height="match_parent"/>

<TextView
android:id="@+id/pdf_tv_num"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="10dp"
android:textColor="#000000"
android:textSize="12sp" />

</RelativeLayout>