Sync sample prebuilts for mnc-dev
Synced with /developers/samples/android commit 415e5ce8ad7128bed20c28e923f2f91bbfff46a9. Change-Id: I8716d051213210ec991fb692f79848a9f086a52c
This commit is contained in:
Trevor Johns
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/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.autobackupsample;
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import android.app.Activity;
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import android.content.Context;
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import android.os.Bundle;
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import android.text.TextUtils;
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import android.util.Log;
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import android.view.Gravity;
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import android.view.View;
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import android.widget.AdapterView;
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import android.widget.ArrayAdapter;
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import android.widget.EditText;
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import android.widget.Spinner;
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import android.widget.Toast;
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import com.example.android.autobackupsample.MainActivityFragment;
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import java.io.BufferedOutputStream;
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import java.io.File;
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import java.io.FileOutputStream;
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/**
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* The purpose of AddFileActivity activity is to create a data file based on the
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* file name and size parameters specified as an Intent external parameters or with the
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* activity UI.
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* <p/>
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* The optional intent parameters are
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* {@link com.example.android.autobackupsample.AddFileActivity#FILE_NAME} and
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* {@link com.example.android.autobackupsample.AddFileActivity#FILE_SIZE_IN_BYTES}.
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* {@link com.example.android.autobackupsample.AddFileActivity#FILE_STORAGE}.
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* <p/>
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* The activity will return an
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* {@link com.example.android.autobackupsample.MainActivityFragment#ADD_FILE_RESULT_ERROR}
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* if intent parameters are specified incorrectly or it will display Toast messages to the user
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* if those parameters are specified via the activity UI.
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*/
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public class AddFileActivity extends Activity {
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private static final String TAG = "AutoBackupSample";
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/**
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* The intent parameter that specifies a file name. The file name must be unique for the
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* application internal directory.
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*/
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public static final String FILE_NAME = "file_name";
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/**
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* The intent parameter that specifies a file size in bytes. The size must be a number
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* larger or equal to 0.
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*/
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public static final String FILE_SIZE_IN_BYTES = "file_size_in_bytes";
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/**
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* The file storage is an optional parameter. It should be one of these:
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* "INTERNAL", "EXTERNAL", "DONOTBACKUP". The default option is "INTERNAL".
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*/
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public static final String FILE_STORAGE = "file_storage";
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/**
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* A file size multiplier. It is used to calculate the total number of bytes to be added
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* to the file.
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*/
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private int mSizeMultiplier = 1;
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/**
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* Defines File Storage options.
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*/
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private static enum FileStorage {
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INTERNAL,
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EXTERNAL,
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DONOTBACKUP;
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}
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/**
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* Contains a selected by a user file storage option.
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*/
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private FileStorage mFileStorage = FileStorage.INTERNAL;
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.add_file);
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initFileSizeSpinner();
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initFileStorageSpinner();
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}
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@Override
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protected void onResume() {
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super.onResume();
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// If an intent has extra parameters, create the file and finish the activity.
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if (getIntent().hasExtra(FILE_NAME) && getIntent().hasExtra(FILE_SIZE_IN_BYTES)) {
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String fileName = getIntent().getStringExtra(FILE_NAME);
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String sizeInBytesParamValue = getIntent().getStringExtra(FILE_SIZE_IN_BYTES);
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String fileStorageParamValue = FileStorage.INTERNAL.toString();
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if (getIntent().hasExtra(FILE_STORAGE)) {
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fileStorageParamValue = getIntent().getStringExtra(FILE_STORAGE);
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}
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if (TextUtils.isEmpty(fileName) ||
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isFileExists(fileName) ||
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!isSizeValid(sizeInBytesParamValue) ||
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!isFileStorageParamValid(fileStorageParamValue)) {
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setResult(MainActivityFragment.ADD_FILE_RESULT_ERROR);
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finish();
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return;
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}
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mFileStorage = FileStorage.valueOf(fileStorageParamValue);
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if (mFileStorage == FileStorage.EXTERNAL && !Utils.isExternalStorageAvailable()) {
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setResult(MainActivityFragment.ADD_FILE_RESULT_ERROR);
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finish();
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return;
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}
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createFileWithRandomDataAndFinishActivity(fileName, mFileStorage,
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sizeInBytesParamValue);
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}
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}
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/**
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* A handler function for a Create File button click event.
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*
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* @param view a reference to the Create File button view.
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*/
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public void onCreateFileButtonClick(View view) {
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EditText fileNameEditText = (EditText) findViewById(R.id.file_name);
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EditText fileSizeEditText = (EditText) findViewById(R.id.file_size);
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String fileName = fileNameEditText.getText().toString();
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String fileSizeEditTextValue = fileSizeEditText.getText().toString();
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if (TextUtils.isEmpty(fileName) || isFileExists(fileName)) {
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Toast toast = Toast.makeText(this, getText(R.string.file_exists), Toast.LENGTH_LONG);
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toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
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toast.show();
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return;
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}
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if (!isSizeValid(fileSizeEditTextValue)) {
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Toast toast = Toast.makeText(this, getText(R.string.file_size_is_invalid),
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Toast.LENGTH_LONG);
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toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
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toast.show();
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return;
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}
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long fileSize = Integer.valueOf(fileSizeEditTextValue) * mSizeMultiplier;
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if (mFileStorage == FileStorage.EXTERNAL && !Utils.isExternalStorageAvailable()) {
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Toast toast = Toast.makeText(this,
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getText(R.string.external_storage_unavailable), Toast.LENGTH_LONG);
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toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
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toast.show();
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return;
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}
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createFileWithRandomDataAndFinishActivity(fileName, mFileStorage, String.valueOf(fileSize));
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}
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private void initFileSizeSpinner() {
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Spinner spinner = (Spinner) findViewById(R.id.file_size_spinner);
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final ArrayAdapter<CharSequence> adapter =
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ArrayAdapter.createFromResource(this, R.array.file_size_array,
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android.R.layout.simple_spinner_item);
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adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
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spinner.setAdapter(adapter);
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spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
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@Override
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public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
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String sizeMeasure = adapter.getItem(position).toString();
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mSizeMultiplier = (int) Math.pow(1024, position);
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if (Log.isLoggable(TAG, Log.DEBUG)) {
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Log.d(TAG, String.format("Selected: %s, %d", sizeMeasure,
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mSizeMultiplier));
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}
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}
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@Override
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public void onNothingSelected(AdapterView<?> parent) {
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}
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});
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}
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private void initFileStorageSpinner() {
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Spinner spinner = (Spinner) findViewById(R.id.storage_spinner);
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final ArrayAdapter<CharSequence> adapter =
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ArrayAdapter.createFromResource(this, R.array.file_storage_array,
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android.R.layout.simple_spinner_item);
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adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
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spinner.setAdapter(adapter);
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spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
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@Override
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public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
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mFileStorage = FileStorage.values()[position];
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}
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@Override
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public void onNothingSelected(AdapterView<?> parent) {
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}
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});
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}
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private void createFileWithRandomDataAndFinishActivity(String fileName, FileStorage storage,
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String sizeInBytes) {
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long size = Long.valueOf(sizeInBytes);
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File file = null;
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FileOutputStream out = null;
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BufferedOutputStream bufOut = null;
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try {
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switch (storage) {
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case INTERNAL:
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file = getInternalFile(fileName);
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out = openFileOutput(file.getName(), Context.MODE_PRIVATE);
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break;
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case EXTERNAL:
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assert Utils.isExternalStorageAvailable() :
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"The external storage is not available";
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File externalAppDir = getExternalFilesDir(null);
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file = new File(externalAppDir, fileName);
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out = new FileOutputStream(file);
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break;
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case DONOTBACKUP:
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file = new File(getNoBackupFilesDir(), fileName);
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out = new FileOutputStream(file);
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break;
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}
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if (file == null || out == null) {
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Log.d(TAG, "Unable to create file output stream");
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// Returning back to the caller activity.
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setResult(MainActivityFragment.ADD_FILE_RESULT_ERROR);
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finish();
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return;
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}
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bufOut = new BufferedOutputStream(out);
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for (int i = 0; i < size; i++) {
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byte b = (byte) (255 * Math.random());
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bufOut.write(b);
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}
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String message = String.format("File created: %s, size: %s bytes",
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file.getAbsolutePath(), sizeInBytes);
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Toast toast = Toast.makeText(this, message, Toast.LENGTH_LONG);
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toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
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toast.show();
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Log.d(TAG, message);
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// Returning back to the caller activity.
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setResult(MainActivityFragment.ADD_FILE_RESULT_SUCCESS);
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finish();
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} catch (Exception e) {
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Log.e(TAG, e.getMessage(), e);
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// Returning back to the caller activity.
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setResult(MainActivityFragment.ADD_FILE_RESULT_ERROR);
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finish();
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} finally {
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if (bufOut != null) {
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try {
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bufOut.close();
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} catch (Exception e) {
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// Ignore.
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}
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}
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}
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}
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private boolean isFileExists(String fileName) {
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File file = getInternalFile(fileName);
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if (file.exists()) {
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if (Log.isLoggable(TAG, Log.DEBUG)) {
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Log.d(TAG, "This file exists: " + file.getName());
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}
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return true;
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}
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return false;
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}
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private boolean isSizeValid(String sizeInBytesParamValue) {
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long sizeInBytes = 0;
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try {
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sizeInBytes = Long.valueOf(sizeInBytesParamValue);
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} catch (NumberFormatException e) {
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if (Log.isLoggable(TAG, Log.DEBUG)) {
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Log.d(TAG, "Invalid file size: " + sizeInBytesParamValue);
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}
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return false;
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}
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// Validate file size value. It should be 0 or a positive number.
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if (sizeInBytes < 0) {
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if (Log.isLoggable(TAG, Log.DEBUG)) {
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Log.d(TAG, "Invalid file size: " + sizeInBytes);
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}
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return false;
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}
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return true;
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}
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private boolean isFileStorageParamValid(String fileStorage) {
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try {
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mFileStorage = FileStorage.valueOf(fileStorage);
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} catch (IllegalArgumentException e) {
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if (Log.isLoggable(TAG, Log.DEBUG)) {
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Log.d(TAG, "Invalid file storage: " + fileStorage);
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}
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return false;
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}
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return true;
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}
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private File getInternalFile(String fileName) {
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File internalAppDir = getFilesDir();
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return new File(internalAppDir, fileName);
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}
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}
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