在Android的视图中显示PDF

File sd = new File(\"example.pdf\");
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.fromFile(sd));
intent.setDataAndType(Uri.fromFile(sd), \"application/pdf\");
try {
    getContext().startActivity(intent);
} catch(ActivityNotFoundException e){
    // Show a message that a PDF viewer is not installed
    Toast.makeText(\"No PDF reader available\",Toast.LENGTH_LONG).show();
}