Android PDF 操作 - AndroidPdfViewer 显示 PDF 异常清单（数据为 null、数据为空、PDF 文件损坏、非 PDF 文件）

正常情况

1、Setting

• settings.gradle

dependencyResolutionManagement {...repositories {...maven { url 'https://jitpack.io' }maven { url "https://repository.liferay.com/nexus/content/repositories/public/" }}
}

• 模块级 build.gradle

implementation 'com.github.barteksc:android-pdf-viewer:3.2.0-beta.1'

2、Activity Layout

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:id="@+id/main"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".viewpdf.ViewPDFActivity"><Buttonandroid:id="@+id/btn_open_pdf"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="打开 PDF 文件"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toTopOf="parent" /><com.github.barteksc.pdfviewer.PDFViewandroid:id="@+id/pdfv_container"android:layout_width="300dp"android:layout_height="300dp"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toBottomOf="@+id/btn_open_pdf" />
</androidx.constraintlayout.widget.ConstraintLayout>

3、Activity Code

Button btnOpenPdf = findViewById(R.id.btn_open_pdf);
PDFView pdfvContainer = findViewById(R.id.pdfv_container);btnOpenPdf.setOnClickListener(v -> {File pdfFile = new File(getFilesDir(), "test.pdf");InputStream inputStream;try {inputStream = new FileInputStream(pdfFile);} catch (FileNotFoundException e) {e.printStackTrace();Toast.makeText(this, "PDF 文件不存在", Toast.LENGTH_SHORT).show();return;}pdfvContainer.fromStream(inputStream).enableSwipe(true) // 启用手势滑动翻页.swipeHorizontal(false) // 设置滑动方向为垂直滑动.enableDoubletap(true) // 启用双击缩放.defaultPage(0) // 设置初始显示的页面.load();
});

---

一、数据为 null

1、基本测试

private byte[] getData() {return null;
}

byte[] data = getData();pdfvContainer.fromBytes(data).enableSwipe(true) // 启用手势滑动翻页.swipeHorizontal(false) // 设置滑动方向为垂直滑动.enableDoubletap(true) // 启用双击缩放.defaultPage(0) // 设置初始显示的页面.load();

• 底层报错，应用闪退，输出结果如下

D  Init FPDF library
java_vm_ext.cc:570] JNI DETECTED ERROR IN APPLICATION: java_array == null
java_vm_ext.cc:570]     in call to GetPrimitiveArray
java_vm_ext.cc:570]     from long com.shockwave.pdfium.PdfiumCore.nativeOpenMemDocument(byte[], java.lang.String)
runtime.cc:647] Runtime aborting...
runtime.cc:647] Dumping all threads without mutator lock held

2、异常捕获测试

private byte[] getData() {return null;
}

byte[] data = getData();try {pdfvContainer.fromBytes(data).enableSwipe(true) // 启用手势滑动翻页.swipeHorizontal(false) // 设置滑动方向为垂直滑动.enableDoubletap(true) // 启用双击缩放.defaultPage(0) // 设置初始显示的页面.load();
} catch (Exception e) {e.printStackTrace();
}

• 异常捕获无效，底层报错，应用闪退，输出结果如下

D  Init FPDF library
java_vm_ext.cc:570] JNI DETECTED ERROR IN APPLICATION: java_array == null
java_vm_ext.cc:570]     in call to GetPrimitiveArray
java_vm_ext.cc:570]     from long com.shockwave.pdfium.PdfiumCore.nativeOpenMemDocument(byte[], java.lang.String)
runtime.cc:647] Runtime aborting...
runtime.cc:647] Dumping all threads without mutator lock held

3、onError 回调测试

private byte[] getData() {return null;
}

byte[] data = getData();pdfvContainer.fromBytes(data).enableSwipe(true) // 启用手势滑动翻页.swipeHorizontal(false) // 设置滑动方向为垂直滑动.enableDoubletap(true) // 启用双击缩放.defaultPage(0) // 设置初始显示的页面.onError(t -> {Log.i(TAG, "加载 PDF 失败：" + t.getMessage());}).load();

• onError 回调无效，底层报错，应用闪退，输出结果如下

D  Init FPDF library
java_vm_ext.cc:570] JNI DETECTED ERROR IN APPLICATION: java_array == null
java_vm_ext.cc:570]     in call to GetPrimitiveArray
java_vm_ext.cc:570]     from long com.shockwave.pdfium.PdfiumCore.nativeOpenMemDocument(byte[], java.lang.String)
runtime.cc:647] Runtime aborting...
runtime.cc:647] Dumping all threads without mutator lock held

---

二、数据为空

1、基本测试

private byte[] getData() {return new byte[0];
}

byte[] data = getData();pdfvContainer.fromBytes(data).enableSwipe(true) // 启用手势滑动翻页.swipeHorizontal(false) // 设置滑动方向为垂直滑动.enableDoubletap(true) // 启用双击缩放.defaultPage(0) // 设置初始显示的页面.load();

• 报错，应用不闪退，异常在库内被捕获，输出结果如下

load pdf error
java.io.IOException: cannot create document: File not in PDF format or corrupted.at com.shockwave.pdfium.PdfiumCore.nativeOpenMemDocument(Native Method)at com.shockwave.pdfium.PdfiumCore.newDocument(PdfiumCore.java:150)at com.github.barteksc.pdfviewer.source.ByteArraySource.createDocument(ByteArraySource.java:35)at com.github.barteksc.pdfviewer.DecodingAsyncTask.doInBackground(DecodingAsyncTask.java:53)at com.github.barteksc.pdfviewer.DecodingAsyncTask.doInBackground(DecodingAsyncTask.java:27)...

2、onError 回调测试

private byte[] getData() {return new byte[0];
}

byte[] data = getData();pdfvContainer.fromBytes(data).enableSwipe(true) // 启用手势滑动翻页.swipeHorizontal(false) // 设置滑动方向为垂直滑动.enableDoubletap(true) // 启用双击缩放.defaultPage(0) // 设置初始显示的页面.onError(t -> {Log.i(TAG, "加载 PDF 失败：" + t.getMessage());}).load();

• onError 回调触发，输出结果如下

加载 PDF 失败：cannot create document: File not in PDF format or corrupted.

---

三、数据异常（PDF 文件损坏）

1、基本测试

private byte[] getData() {try {File pdfFile = new File(getFilesDir(), "test.pdf");InputStream inputStream = new FileInputStream(pdfFile);ByteArrayOutputStream buffer = new ByteArrayOutputStream();int nRead;byte[] data = new byte[1024];while ((nRead = inputStream.read(data, 0, data.length)) != -1) {buffer.write(data, 0, nRead);}byte[] bytes = buffer.toByteArray();// 替换 100 个字节for (int i = 0; i < 100; i++) {bytes[i] = (byte) (bytes[i] + 1);}return bytes;} catch (IOException e) {e.printStackTrace();}return null;
}

byte[] data = getData();pdfvContainer.fromBytes(data).enableSwipe(true) // 启用手势滑动翻页.swipeHorizontal(false) // 设置滑动方向为垂直滑动.enableDoubletap(true) // 启用双击缩放.defaultPage(0) // 设置初始显示的页面.load();

• 报错，应用不闪退，异常在库内被捕获，输出结果如下

load pdf error
java.io.IOException: cannot create document: File not in PDF format or corrupted.at com.shockwave.pdfium.PdfiumCore.nativeOpenMemDocument(Native Method)at com.shockwave.pdfium.PdfiumCore.newDocument(PdfiumCore.java:150)at com.github.barteksc.pdfviewer.source.ByteArraySource.createDocument(ByteArraySource.java:35)at com.github.barteksc.pdfviewer.DecodingAsyncTask.doInBackground(DecodingAsyncTask.java:53)at com.github.barteksc.pdfviewer.DecodingAsyncTask.doInBackground(DecodingAsyncTask.java:27)...

2、onError 回调测试

private byte[] getData() {try {File pdfFile = new File(getFilesDir(), "test.pdf");InputStream inputStream = new FileInputStream(pdfFile);ByteArrayOutputStream buffer = new ByteArrayOutputStream();int nRead;byte[] data = new byte[1024];while ((nRead = inputStream.read(data, 0, data.length)) != -1) {buffer.write(data, 0, nRead);}byte[] bytes = buffer.toByteArray();// 替换 100 个字节for (int i = 0; i < 100; i++) {bytes[i] = (byte) (bytes[i] + 1);}return bytes;} catch (IOException e) {e.printStackTrace();}return null;
}

byte[] data = getData();pdfvContainer.fromBytes(data).enableSwipe(true) // 启用手势滑动翻页.swipeHorizontal(false) // 设置滑动方向为垂直滑动.enableDoubletap(true) // 启用双击缩放.defaultPage(0) // 设置初始显示的页面.onError(t -> {Log.i(TAG, "加载 PDF 失败：" + t.getMessage());}).load();

• onError 回调触发，输出结果如下

加载 PDF 失败：cannot create document: File not in PDF format or corrupted.

---

四、数据异常（非 PDF 文件）

1、基本测试

private byte[] getData() {try {File pdfFile = new File(getFilesDir(), "test.docx");InputStream inputStream = new FileInputStream(pdfFile);ByteArrayOutputStream buffer = new ByteArrayOutputStream();int nRead;byte[] data = new byte[1024];while ((nRead = inputStream.read(data, 0, data.length)) != -1) {buffer.write(data, 0, nRead);}return buffer.toByteArray();} catch (IOException e) {e.printStackTrace();}return null;
}

byte[] data = getData();pdfvContainer.fromBytes(data).enableSwipe(true) // 启用手势滑动翻页.swipeHorizontal(false) // 设置滑动方向为垂直滑动.enableDoubletap(true) // 启用双击缩放.defaultPage(0) // 设置初始显示的页面.load();

• 报错，应用不闪退，异常在库内被捕获，输出结果如下

load pdf error
java.io.IOException: cannot create document: File not in PDF format or corrupted.at com.shockwave.pdfium.PdfiumCore.nativeOpenMemDocument(Native Method)at com.shockwave.pdfium.PdfiumCore.newDocument(PdfiumCore.java:150)at com.github.barteksc.pdfviewer.source.ByteArraySource.createDocument(ByteArraySource.java:35)at com.github.barteksc.pdfviewer.DecodingAsyncTask.doInBackground(DecodingAsyncTask.java:53)at com.github.barteksc.pdfviewer.DecodingAsyncTask.doInBackground(DecodingAsyncTask.java:27)...

2、onError 回调测试

private byte[] getData() {try {File pdfFile = new File(getFilesDir(), "test.docx");InputStream inputStream = new FileInputStream(pdfFile);ByteArrayOutputStream buffer = new ByteArrayOutputStream();int nRead;byte[] data = new byte[1024];while ((nRead = inputStream.read(data, 0, data.length)) != -1) {buffer.write(data, 0, nRead);}return buffer.toByteArray();} catch (IOException e) {e.printStackTrace();}return null;
}

byte[] data = getData();pdfvContainer.fromBytes(data).enableSwipe(true) // 启用手势滑动翻页.swipeHorizontal(false) // 设置滑动方向为垂直滑动.enableDoubletap(true) // 启用双击缩放.defaultPage(0) // 设置初始显示的页面.onError(t -> {Log.i(TAG, "加载 PDF 失败：" + t.getMessage());}).load();

• onError 回调触发，输出结果如下

加载 PDF 失败：cannot create document: File not in PDF format or corrupted.