本文介绍了无法为Intent Android打开pdf文件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我彻底检查了pdf文件是否在/storage/emulated/0/Download/Abcd.pdf"
但无法故意打开它.
I thoroughly checked that pdf file is in/storage/emulated/0/Download/Abcd.pdf"
but can't open it with intent.
我在各种查看器中打开了它,有的哦,这会导致错误:无法打开文件".Microsoft word说:检查设备中的文件
,但是当我在android的文件系统中的文件目录中打开 Abcd.pdf
文件时,它打开得很好.
I opened it in various viewers and some oh them result in a error: "can't open file". Microsoft word says: check file in the device
, but Abcd.pdf
file is opened well when I opened it in file directory in file system of android.
我设置的路线错误吗?
AndroidManifest.xml
AndroidManifest.xml
<provider
android:authorities="${applicationId}.provider"
android:name="android.support.v4.content.FileProvider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths"/>
</provider>
MainActivity.Java
MainActivity.Java
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent intent=new Intent();
File mypath=new File( Environment.getExternalStorageDirectory().getAbsolutePath() + "/Download/","Abcd.pdf");
Log.e("download",mypath.getAbsolutePath());
//this log says : /storage/emulated/0/Download/Abcd.pdf
Uri pdfUri = FileProvider.getUriForFile(getApplicationContext(), getApplicationContext().getPackageName() + ".provider", mypath);
Log.e("download",mypath.exists()+"");
if (mypath.exists()) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
Log.e("download","result : "+pdfUri.getPath());
intent = new Intent(Intent.ACTION_VIEW);
intent.setType("application/pdf");
intent.putExtra(MediaStore.EXTRA_OUTPUT, pdfUri);
}else{
}
intent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
try {
startActivity(intent);
}
catch (ActivityNotFoundException e) {
Log.e("error","error"+e);
}
}
}
res/xml/provider_paths.xml
res/xml/provider_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path
name="storage/emulated/0"
path="."/>
</paths>
推荐答案
我正在使用此功能:
public void openPdf(LocalFile magazine) {
if (BuildConfig.DEBUG)
Log.d(TAG, "openPdf() called with: magazine = [" + magazine + "]");
Intent intent = new Intent(Intent.ACTION_VIEW);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
File file = new File(Uri.parse(magazine.getPath()).getPath());
Uri uri = FileProvider.getUriForFile(getContext(),
getContext().getApplicationContext().getPackageName() + ".provider", file);
intent.setDataAndType(uri, "application/pdf");
intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
} else {
intent.setDataAndType(Uri.parse(magazine.getPath()), "application/pdf");
}
try {
startActivity(intent);
} catch (Throwable t) {
t.printStackTrace();
//attemptInstallViewer();
}
}
这对我来说很好.
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