我彻底检查了 pdf 文件是否在其中,
/storage/emulated/0/Download/Abcd.pdf"
但无法有意打开它。
我在各种查看器中打开它,有些人会导致错误:“无法打开文件”。Microsoft word 说:check file in the device,但是Abcd.pdf当我在android文件系统的文件目录中打开文件时,文件打开得很好。
我是不是路线设置错了?
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>
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主Activity.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{
} …Run Code Online (Sandbox Code Playgroud)