我必须使用FileProvider才能安装apk。现在一切正常,但是我不真正理解FileProvider的行为以选择在 provider_paths.xml 中定义的正确路径。这是我的代码:
Manifest.xml
<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>
main_activity.java
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
intent = new Intent(Intent.ACTION_VIEW);
File apk = new File("/sdcard/example.apk");
String fileType = "application/vnd.android.package-archive";
intent.setDataAndType(Uri.fromFile(apk), fileType);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
} else {
intent = new Intent(Intent.ACTION_INSTALL_PACKAGE);
File directory = new File(Environment.getExternalStorageDirectory().toString());
File apk = new File(directory, "example.apk");
Uri fileUri = FileProvider.getUriForFile(this, valoresGenerales.appContext.getPackageName() + ".provider", apk);
String type = MimeTypeMap.getSingleton().getMimeTypeFromExtension(MimeTypeMap.getFileExtensionFromUrl(apk.getName()));
intent.setDataAndType(fileUri, type);
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
}
startActivity(intent);
provider_paths.xml
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="." />
<files-path name="files_path" path="Download"/>
</paths>
FileProvider取决于什么? external_path 或 files_path (或文件中定义的任何内容)取决于什么?