需要将应用中生成的PDF直接打印出来
构建PDFDocumentAdapter
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| public class PDFDocumentAdapter extends PrintDocumentAdapter {
private static final String TAG = "PDFDocumentAdapter";
Context context;
String pdfPath;
File pdfFile;
public PDFDocumentAdapter(Context context, String pdfPath) {
this.context = context;
this.pdfPath = pdfPath;
}
public PDFDocumentAdapter(Context context, File pdfFile) {
this.context = context;
this.pdfFile = pdfFile;
}
@Override
public void onLayout(PrintAttributes oldAttributes, PrintAttributes newAttributes, CancellationSignal cancellationSignal, LayoutResultCallback callback, Bundle extras) {
if (cancellationSignal.isCanceled()) {
callback.onLayoutCancelled();
InsToastUtil.showInBottom("取消打印");
} else {
PrintDocumentInfo.Builder builder =
new PrintDocumentInfo.Builder(" file name");
builder.setContentType(PrintDocumentInfo.CONTENT_TYPE_DOCUMENT)
.setPageCount(PrintDocumentInfo.PAGE_COUNT_UNKNOWN)
.build();
callback.onLayoutFinished(builder.build(),
!newAttributes.equals(oldAttributes));
}
}
@Override
public void onWrite(PageRange[] pages, ParcelFileDescriptor destination, CancellationSignal cancellationSignal, WriteResultCallback callback) {
InputStream in = null;
OutputStream out = null;
try {
File file;
if (pdfFile != null) {
file = pdfFile;
}else {
file = new File(pdfPath);
}
in = new FileInputStream(file);
out = new FileOutputStream(destination.getFileDescriptor());
byte[] buf = new byte[16384];
int size;
while ((size = in.read(buf)) >= 0
&& !cancellationSignal.isCanceled()) {
out.write(buf, 0, size);
}
if (cancellationSignal.isCanceled()) {
callback.onWriteCancelled();
InsToastUtil.showInBottom("取消打印");
} else {
callback.onWriteFinished(new PageRange[]{PageRange.ALL_PAGES});
InsToastUtil.showInBottom("打印完成");
}
} catch (Exception e) {
callback.onWriteFailed(e.getMessage());
e.printStackTrace();
} finally {
try {
if (in != null) {
in.close();
}
if (out != null) {
out.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
|
打印
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private void print() {
PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
try {
PrintDocumentAdapter printAdapter = new PDFDocumentAdapter(this, Static.getRootFolderPath() + File.separator + "test.pdf");
printManager.print("Document", printAdapter, new PrintAttributes.Builder().build());
} catch (Exception e) {
e.printStackTrace();
}
}
|
需要手动添加打印机，即可打印，但是打印过程中存在纸张尺寸不匹配问题
