【发布时间】：2016-01-03 16:30:37
【问题描述】：
我有这个布局，我想将屏幕上的所有内容都打印为 PDF。 包括滚动视图中的所有内容。稍后我还将尝试使用 IText 执行此操作，但现在我想看看是否可以使用 PrintedPdfDocument 和 View.draw 执行此操作。我生成了 PDF，但 PDF 上只有部分布局可见。
完整的项目正在进行中： https://github.com/ammar5001/PrintPDF2
这是布局：
<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:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity"
android:id="@+id/relativeLayout">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Title"
android:id="@+id/textView"
android:textSize="24dp"
android:textStyle="bold"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textView2"
android:text="Auther Name\nTitle\nContacts"
android:textSize="16dp"
android:layout_below="@+id/textView"
android:layout_alignParentStart="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Some Company\nStreet Address\nCity, State\nzip code"
android:id="@+id/textView3"
android:layout_below="@+id/textView"
android:layout_alignParentEnd="true"
android:textSize="16dp"
android:layout_marginBottom="10dp" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Print PDF"
android:id="@+id/button1"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:onClick="printPDF" />
<ScrollView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/scrollView"
android:layout_below="@id/textView3"
android:layout_above="@id/button1"
android:layout_marginTop="10dp">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="For some applications, such as drawing apps, page layout apps and other apps that focus on graphic output, creating beautiful printed pages is a key feature. In this case, it is not enough to print an image or an HTML document. The print output for these types of applications requires precise control of everything that goes into a page, including fonts, text flow, page breaks, headers, footers, and graphic elements."
android:id="@+id/textView4"
android:layout_marginBottom="10dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Creating print output that is completely customized for your application requires more programming investment than the previously discussed approaches. You must build components that communicate with the print framework, adjust to printer settings, draw page elements and manage printing on multiple pages. This lesson shows you how you connect with the print manager, create a print adapter and build content for printing."
android:id="@+id/textView5"
android:layout_marginBottom="10dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="When your application manages the printing process directly, the first step after receiving a print request from your user is to connect to the Android print framework and obtain an instance of the PrintManager class. This class allows you to initialize a print job and begin the printing lifecycle. The following code example shows how to get the print manager and start the printing process"
android:id="@+id/textView6"
android:layout_marginBottom="10dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="The example code above demonstrates how to name a print job and set an instance of the PrintDocumentAdapter class which handles the steps of the printing lifecycle. The implementation of the print adapter class is discussed in the next section."
android:id="@+id/textView7"
android:layout_marginBottom="10dp"/>
</LinearLayout>
</ScrollView>
</RelativeLayout>
这是我正在使用的方法：
public void printPDF(View view){
if(isExternalStorageWritable()) {
String filename = getFileName();
File file = new File(getAlbumStorageDir("PDF"), filename);
try {
FileOutputStream outputStream = new FileOutputStream(file);
createPDF(outputStream);
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
}
}
}
private void createPDF(FileOutputStream outputStream) throws IOException {
PrintedPdfDocument document = new PrintedPdfDocument(this,
getPrintAttributes());
// start a page
PdfDocument.Page page = document.startPage(1);
// draw something on the page
View content = getContentView();
content.draw(page.getCanvas());
// finish the page
document.finishPage(page);
//. . .
// add more pages
//. . .
// write the document content
document.writeTo(outputStream);
//close the document
document.close();
}
private View getContentView() {
return findViewById(R.id.relativeLayout);
}
【问题讨论】：
-
你有什么解决办法吗？
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使用 ISO_A2 或 PrintAttributes 中的任何其他媒体尺寸将整个布局打印到 pdf PrintAttributes.Builder builder = new PrintAttributes.Builder().setMediaSize(PrintAttributes.MediaSize.ISO_A2) .setResolution(new PrintAttributes. Resolution("res1","Resolution",50,50)).setMinMargins(new PrintAttributes.Margins(5, 5, 5, 5)); PrintAttributes printAttributes = builder.build();
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您能否发布您对该问题的工作解决方案？\