Android Результат установки PackageInstaller

Question

Я использую PackageInstaller и PackageInstaller.Session для установки приложения из моего приложения. Я хотел бы отображать сообщение в моем приложении, когда установка не удалась (например, в случае плохой подписи apk). Как я могу получить результат сеанса установки?

Answer 1

Когда вы commit() свой Session, вам нужно указать IntentSender, который указывает на какой-то компонент, например BroadcastReceiver. Здесь я делаю это в installCoroutine():

/*
  Copyright (c) 2019 CommonsWare, LLC

  Licensed under the Apache License, Version 2.0 (the "License"); you may not
  use this file except in compliance with the License. You may obtain   a copy
  of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required
  by applicable law or agreed to in writing, software distributed under the
  License is distributed on an "AS IS" BASIS,   WITHOUT WARRANTIES OR CONDITIONS
  OF ANY KIND, either express or implied. See the License for the specific
  language governing permissions and limitations under the License.

  Covered in detail in the book _Elements of Android Q

  https://commonsware.com/AndroidQ
*/

package com.commonsware.q.appinstaller

import android.app.Application
import android.app.PendingIntent
import android.content.Intent
import android.content.pm.PackageInstaller
import android.net.Uri
import androidx.documentfile.provider.DocumentFile
import androidx.lifecycle.AndroidViewModel
import androidx.lifecycle.viewModelScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext

private const val NAME = "mostly-unused"
private const val PI_INSTALL = 3439

class MainMotor(app: Application) : AndroidViewModel(app) {
  private val installer = app.packageManager.packageInstaller
  private val resolver = app.contentResolver

  fun install(apkUri: Uri) {
    viewModelScope.launch(Dispatchers.Main) {
      installCoroutine(apkUri)
    }
  }

  private suspend fun installCoroutine(apkUri: Uri) =
    withContext(Dispatchers.IO) {
      resolver.openInputStream(apkUri)?.use { apkStream ->
        val length =
          DocumentFile.fromSingleUri(getApplication(), apkUri)?.length() ?: -1
        val params =
          PackageInstaller.SessionParams(PackageInstaller.SessionParams.MODE_FULL_INSTALL)
        val sessionId = installer.createSession(params)
        val session = installer.openSession(sessionId)

        session.openWrite(NAME, 0, length).use { sessionStream ->
          apkStream.copyTo(sessionStream)
          session.fsync(sessionStream)
        }

        val intent = Intent(getApplication(), InstallReceiver::class.java)
        val pi = PendingIntent.getBroadcast(
          getApplication(),
          PI_INSTALL,
          intent,
          PendingIntent.FLAG_UPDATE_CURRENT
        )

        session.commit(pi.intentSender)
        session.close()
      }
    }
}

Затем ваш компонент может посмотреть на EXTRA_STATUS, чтобы получить статус:

/*
  Copyright (c) 2019 CommonsWare, LLC

  Licensed under the Apache License, Version 2.0 (the "License"); you may not
  use this file except in compliance with the License. You may obtain   a copy
  of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required
  by applicable law or agreed to in writing, software distributed under the
  License is distributed on an "AS IS" BASIS,   WITHOUT WARRANTIES OR CONDITIONS
  OF ANY KIND, either express or implied. See the License for the specific
  language governing permissions and limitations under the License.

  Covered in detail in the book _Elements of Android Q

  https://commonsware.com/AndroidQ
*/

package com.commonsware.q.appinstaller

import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.content.pm.PackageInstaller
import android.media.AudioManager
import android.media.ToneGenerator
import android.util.Log

private const val TAG = "AppInstaller"

class InstallReceiver : BroadcastReceiver() {
  override fun onReceive(context: Context, intent: Intent) {

    when (val status = intent.getIntExtra(PackageInstaller.EXTRA_STATUS, -1)) {
      PackageInstaller.STATUS_PENDING_USER_ACTION -> {
        val activityIntent =
          intent.getParcelableExtra<Intent>(Intent.EXTRA_INTENT)

        context.startActivity(activityIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK))
      }
      PackageInstaller.STATUS_SUCCESS ->
        ToneGenerator(AudioManager.STREAM_NOTIFICATION, 100)
          .startTone(ToneGenerator.TONE_PROP_ACK)
      else -> {
        val msg = intent.getStringExtra(PackageInstaller.EXTRA_STATUS_MESSAGE)

        Log.e(TAG, "received $status and $msg")
      }
    }
  }
}

Похоже, STATUS_FAILURE_INVALID будет означать недействительную подпись.