我尝试在 Oreo 中打开 PDF 文件,但它打不开。我没有收到任何错误。问题是什么? PDF 文件打不开。仅显示黑屏。在 logcat 中没有错误显示。怎么了?
我该如何解决这个问题?我提到了很多链接,但没有得到解决方案。我也尝试了很多代码,但没有帮助。
我的代码是:
File file11 = new File(Environment.getExternalStorageDirectory().
getAbsolutePath(),
"AtmiyaImages/" + nameoffile1);
Intent target = new Intent(Intent.ACTION_VIEW);
target.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
if(Build.VERSION.SDK_INT>24){
Uri uri=FileProvider.getUriForFile(AssignmentActivity.this,
getPackageName()+".provider",file11);
target.addFlags(Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION);
target.putExtra(Intent.EXTRA_STREAM,uri);
target.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
target.setType("application/pdf");
Intent intent=Intent.createChooser(target,"Open File");
try
{
startActivity(intent);
}
catch(ActivityNotFoundException e)
{
Toast.makeText(AssignmentActivity.this,"No Apps
can performs This acttion",Toast.LENGTH_LONG).show();
}
}
else
{
target.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
target.setDataAndType(Uri.fromFile(file11),"application/pdf");
target.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
Intent intent=Intent.createChooser(target,"Open File");
try
{
startActivity(intent);
}
catch(ActivityNotFoundException e)
{
Toast.makeText(AssignmentActivity.this,"No Apps can performs This
acttion",Toast.LENGTH_LONG).show();
}
}
在Manifest中我也添加
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.infinity.infoway.atmiya.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths"/>
</provider>
我的Xml代码是:
<?xml version="1.0" encoding="utf-8"?>
<paths>
<external-path
name="Phonestorage"
path="/storage/emulated/0/AtmiyaImages"/>
</paths>
最佳答案
将您的路径值替换为“.” - 看下面:
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="."/>
</paths>
在Manifest里面,“provider”代码是这样的,你的也是。
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths" />
</provider>
要访问正确的文件路径,请遵循以下代码:
File pdfFile = new File(getExternalFilesDir(GlobalUtils.AppFolder), fileName);
Uri path = FileProvider.getUriForFile(this, BuildConfig.APPLICATION_ID + ".provider", pdfFile);
Log.e("create pdf uri path==>", "" + path);
try {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(path, "application/pdf");
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(intent);
finish();
} catch (ActivityNotFoundException e) {
Toast.makeText(getApplicationContext(),
"There is no any PDF Viewer",
Toast.LENGTH_SHORT).show();
finish();
}
希望对您有所帮助。
关于android - 如何在 Oreo 中打开内部存储中的 PDF 文件?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/52789578/