[英]Parse error when programmatically installing an APK from Assets Folder
我正在嘗試以編程方式從 assets 文件夾安裝 apk,但是 Parse Error 我已經用 Google 搜索了好幾天,幾乎一切都很好,但仍然存在錯誤這是我的代碼
AndroidManifest.xml
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
<application>
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_provider_paths" />
</provider>
</application
file_provider_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path
name="external"
path="." />
<external-files-path
name="external_files"
path="." />
<cache-path
name="cache"
path="." />
<external-cache-path
name="external_cache"
path="." />
<files-path
name="files"
path="." />
<root-path name="root" path="." />
</paths>
主要活動
private void installApk() {
File f = new File("file:///android_asset/app.apk");
f.setReadable(true, false);
Uri apkUri = FileProvider.getUriForFile(this, BuildConfig.APPLICATION_ID + ".provider",f);
Intent installIntent = new Intent(Intent.ACTION_INSTALL_PACKAGE);
installIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
installIntent.setDataAndType(apkUri, "application/vnd.android.package-archive");
installIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(installIntent);
}
檢查權限
private void checkWriteExternalStoragePermission() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
if (!getPackageManager().canRequestPackageInstalls()) {
startActivity(new Intent(Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES).setData(Uri.parse(String.format("package:%s", getPackageName()))));
}
}
if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
installApk();
} else {
installApk();
}
}
private void requestWriteExternalStoragePermission() {
if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE)!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, MY_PERMISSION_REQUEST_WRITE_EXTERNAL_STORAGE);
} else{
ActivityCompat.requestPermissions(MainActivity.this,new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, MY_PERMISSION_REQUEST_WRITE_EXTERNAL_STORAGE);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode==MY_PERMISSION_REQUEST_WRITE_EXTERNAL_STORAGE && grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
installApk();
} else {
Toast.makeText(MainActivity.this, "Permission Not Granted.", Toast.LENGTH_SHORT).show();
}
}
文件 app.apk 位置:main->assets
請注意,即使我將文件寫為
File f = new File(getFilesDir(), "app.apk");
仍然解析錯誤
目標SDK = 31
您不能直接從 assets 文件夾安裝 APK,因為系統的軟件包安裝程序無法訪問該文件夾。 您必須首先將該 APK 復制到公共文檔目錄等共享文件夾,然后將該目錄中的文件 URI 傳遞給意圖
val publicDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS)
編輯:將文件復制到外部存儲的步驟:
val file = new File("file:///android_asset/app.apk");
val publicDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS)
val destinationAPKFile = File(publicDir, "your_apk_name.apk")
try {
FileUtils.copyFile(file, destinationAPKFile)
}
catch (e: Exception)
{
e.printStackTrace();
}
然后您可以使用destinationAPKFile 的URI 並照常安裝APK。
編輯2:在java中
File file = new File("file:///android_asset/app.apk");
File publicDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS);
File destinationAPKFile = File(publicDir, "your_apk_name.apk");
try {
FileUtils.copyFile(file, destinationAPKFile)
}
catch (Exception e)
{
e.printStackTrace();
}
編輯 3:要使用 FileUtils.copyTo,請將以下依賴項添加到您的應用級別 gradle
implementation group: 'commons-io', name: 'commons-io', version: '2.6'
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