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/*
* Copyright (C) 2016 The Android Open Source Project
*
* 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.
*/
package com.android.packageinstaller;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.util.Log;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* If a package gets installed from an content URI this step loads the package and turns it into
* and installation from a file. Then it re-starts the installation as usual.
*/
public class InstallStaging extends Activity {
private static final String LOG_TAG = InstallStaging.class.getSimpleName();
private static final String STAGED_FILE = "STAGED_FILE";
/** Currently running task that loads the file from the content URI into a file */
private @Nullable StagingAsyncTask mStagingTask;
/** The file the package is in */
private @Nullable File mStagedFile;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.install_staging);
if (savedInstanceState != null) {
mStagedFile = new File(savedInstanceState.getString(STAGED_FILE));
if (!mStagedFile.exists()) {
mStagedFile = null;
}
}
findViewById(R.id.cancel_button).setOnClickListener(view -> {
if (mStagingTask != null) {
mStagingTask.cancel(true);
}
setResult(RESULT_CANCELED);
finish();
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
setResult(resultCode, data);
if (mStagedFile != null) {
mStagedFile.delete();
}
// This is executed before onResume but after the mStagingTask completed, hence no need
// to deal with the task.
finish();
}
@Override
protected void onResume() {
super.onResume();
// This is the first onResume in a single life of the activity
if (mStagingTask == null) {
// File does not exist, or became invalid
if (mStagedFile == null) {
// Create file delayed to be able to show error
try {
mStagedFile = TemporaryFileManager.getStagedFile(this);
} catch (IOException e) {
showError();
return;
}
}
mStagingTask = new StagingAsyncTask();
mStagingTask.execute(getIntent().getData());
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putString(STAGED_FILE, mStagedFile.getPath());
}
@Override
protected void onDestroy() {
if (mStagingTask != null) {
mStagingTask.cancel(true);
}
super.onDestroy();
}
/**
* Show an error message and set result as error.
*/
private void showError() {
(new ErrorDialog()).showAllowingStateLoss(getFragmentManager(), "error");
Intent result = new Intent();
result.putExtra(Intent.EXTRA_INSTALL_RESULT,
PackageManager.INSTALL_FAILED_INVALID_APK);
setResult(RESULT_FIRST_USER, result);
}
/**
* Dialog for errors while staging.
*/
public static class ErrorDialog extends DialogFragment {
private Activity mActivity;
@Override
public void onAttach(Context context) {
super.onAttach(context);
mActivity = (Activity) context;
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
AlertDialog alertDialog = new AlertDialog.Builder(mActivity)
.setMessage(R.string.Parse_error_dlg_text)
.setPositiveButton(R.string.ok,
(dialog, which) -> mActivity.finish())
.create();
alertDialog.setCanceledOnTouchOutside(false);
return alertDialog;
}
@Override
public void onCancel(DialogInterface dialog) {
super.onCancel(dialog);
mActivity.finish();
}
}
private final class StagingAsyncTask extends AsyncTask<Uri, Void, Boolean> {
@Override
protected Boolean doInBackground(Uri... params) {
if (params == null || params.length <= 0) {
return false;
}
Uri packageUri = params[0];
try (InputStream in = getContentResolver().openInputStream(packageUri)) {
// Despite the comments in ContentResolver#openInputStream the returned stream can
// be null.
if (in == null) {
return false;
}
try (OutputStream out = new FileOutputStream(mStagedFile)) {
byte[] buffer = new byte[1024 * 1024];
int bytesRead;
while ((bytesRead = in.read(buffer)) >= 0) {
// Be nice and respond to a cancellation
if (isCancelled()) {
return false;
}
out.write(buffer, 0, bytesRead);
}
}
} catch (IOException | SecurityException e) {
Log.w(LOG_TAG, "Error staging apk from content URI", e);
return false;
}
return true;
}
@Override
protected void onPostExecute(Boolean success) {
if (success) {
// Now start the installation again from a file
Intent installIntent = new Intent(getIntent());
installIntent.setClass(InstallStaging.this, PackageInstallerActivity.class);
installIntent.setData(Uri.fromFile(mStagedFile));
installIntent
.setFlags(installIntent.getFlags() & ~Intent.FLAG_ACTIVITY_FORWARD_RESULT);
installIntent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
startActivityForResult(installIntent, 0);
} else {
showError();
}
}
}
}
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