Java tutorial
/* * Copyright (c) 2016. Vv <envyfan@qq.com><http://www.v-sounds.com/> * * This file is part of AndroidReview (Android??) * * AndroidReview is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * AndroidReview is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with AndroidReview. If not, see <http://www.gnu.org/licenses/>. */ package com.vv.androidreview.ui.activites; import android.Manifest; import android.app.Activity; import android.content.Intent; import android.content.pm.PackageManager; import android.os.Bundle; import android.os.Handler; import android.support.v4.app.ActivityCompat; import android.support.v4.content.ContextCompat; import com.vv.androidreview.R; import com.vv.androidreview.base.system.AppManager; import com.vv.androidreview.utils.PermissionsChecker; import com.vv.androidreview.utils.ToastHelper; public class AppStartActivity extends Activity { private final int SPLASH_DISPLAY_LENGHT = 2000; // 2 private static final int REQUEST_CODE = 0; // ? // ?? static final String[] PERMISSIONS = new String[] { Manifest.permission.READ_PHONE_STATE, Manifest.permission.WRITE_EXTERNAL_STORAGE }; private PermissionsChecker mPermissionsChecker; // ?? @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // ? Activity aty = AppManager.getActivity(MainActivity.class); if (aty != null && !aty.isFinishing()) { finish(); } setContentView(R.layout.activity_app_start); mPermissionsChecker = new PermissionsChecker(this); } @Override protected void onResume() { super.onResume(); // ??, ???? if (mPermissionsChecker.lacksPermissions(PERMISSIONS)) { PermissionsActivity.startActivityForResult(this, REQUEST_CODE, PERMISSIONS); } else { enterMainDelay(); } } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); // ?, ?, ???, ? if (requestCode == REQUEST_CODE && resultCode == PermissionsActivity.PERMISSIONS_DENIED) { finish(); } } private void enterMainDelay() { new Handler().postDelayed(new Runnable() { @Override public void run() { redirectTo(); } }, SPLASH_DISPLAY_LENGHT); } /** * Activity */ private void redirectTo() { Intent intent = new Intent(this, MainActivity.class); startActivity(intent); finish(); } }