我想知道您是否可以提供幫助，我正在嘗試在版本檢查后下載一個(gè) apk 文件作為更新。它正在下載 apk，但它不會(huì)打開(kāi) apk 文件它在嘗試打開(kāi) apk 時(shí)打印錯(cuò)誤錯(cuò)誤 ：E/UpdateAPP: Update error! file:///storage/emulated/0/download/update.apk exposed beyond app through Intent.getData()代碼 ：public class UpdateApp extends AsyncTask<String,Void,Void> { private Context context; public void setContext(Context contextf){ context = contextf; } @Override protected Void doInBackground(String... arg0) { try { URL url = new URL(arg0[0]); HttpURLConnection c = (HttpURLConnection) url.openConnection(); c.setRequestMethod("GET"); c.setDoOutput(true); c.connect(); String PATH = Environment.getExternalStorageDirectory() + "/download/"; File file = new File(PATH); file.mkdirs(); File outputFile = new File(file, "update.apk"); if(outputFile.exists()){ outputFile.delete(); } FileOutputStream fos = new FileOutputStream(outputFile); InputStream is = c.getInputStream(); byte[] buffer = new byte[1024]; int len1 = 0; while ((len1 = is.read(buffer)) != -1) { fos.write(buffer, 0, len1); } fos.close(); is.close(); Intent intent = new Intent(Intent.ACTION_VIEW); intent.setDataAndType(Uri.fromFile(new File(Environment.getExternalStorageDirectory() + "/download/" + "/update.apk")), "application/vnd.android.package-archive"); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); // without this flag android returned a intent error! context.startActivity(intent); } catch (Exception e) { Log.e("UpdateAPP", "Update error! " + e.getMessage()); } return null; }}我的 targetSdkVersion ：targetSdkVersion 27謝謝您的幫助
1 回答
MMTTMM
TA貢獻(xiàn)1869條經(jīng)驗(yàn) 獲得超4個(gè)贊
從 API 26 開(kāi)始，“REQUEST_INSTALL_PACKAGES”權(quán)限是實(shí)現(xiàn)安裝 apk 文件的必要權(quán)限。
在 res/xml 文件夾中創(chuàng)建“file_paths.xml”以使用 FileProvider api
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="" path="/" />
</paths>
在 AndroidManifest.xml 中聲明 FileProvider 和權(quán)限
筆記。我使用的是 Androidx 版本的 FileProvider，如果你不使用 androidx，請(qǐng)確保 android.support.v4.content.FileProvider
<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="{PACKAGE_NAME}.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths" />
</provider>
通過(guò) FileProvider api 獲取“Uri”并請(qǐng)求安裝權(quán)限
private fun openFile(file: File) {
val uri = if (Build.VERSION.SDK_INT >= 24) {
val authority = packageName + ".fileprovider"
FileProvider.getUriForFile(this, authority, file)
} else {
Uri.fromFile(file)
}
val myMime = MimeTypeMap.getSingleton()
val mimeType = myMime.getMimeTypeFromExtension(file.extension)
val intent = Intent(Intent.ACTION_VIEW).apply {
setDataAndType(uri, mimeType)
flags = Intent.FLAG_ACTIVITY_NEW_TASK
addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
}
if (Build.VERSION.SDK_INT >= 26 && !packageManager.canRequestPackageInstalls()) {
startActivity(
Intent(
Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES,
Uri.parse("package:$packageName")
)
)
} else {
intent.action = Intent.ACTION_VIEW
startActivity(intent)
}
}
編輯 -> 刪除在我的項(xiàng)目中使用的特定方法。
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