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import android.animation.Animator;
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import android.animation.AnimatorListenerAdapter;
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import android.annotation.TargetApi;
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import android.content.Intent;
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import android.content.SharedPreferences;
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import android.content.pm.PackageManager;
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import android.graphics.Color;
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import android.preference.PreferenceManager;
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import android.support.annotation.NonNull;
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import android.support.design.widget.Snackbar;
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import android.support.v7.app.AppCompatActivity;
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import android.app.LoaderManager.LoaderCallbacks;
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import android.content.CursorLoader;
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import android.content.Loader;
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import android.database.Cursor;
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import android.net.Uri;
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import android.os.AsyncTask;
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import android.os.Build;
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import android.os.Bundle;
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import android.provider.ContactsContract;
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import android.text.TextUtils;
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import android.util.Log;
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import android.view.KeyEvent;
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import android.view.View;
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import android.view.View.OnClickListener;
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import android.view.inputmethod.EditorInfo;
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import android.widget.ArrayAdapter;
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import android.widget.AutoCompleteTextView;
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import android.widget.Button;
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import android.widget.CheckBox;
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import android.widget.EditText;
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import android.widget.TextView;
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import android.widget.Toast;
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import com.android.volley.AuthFailureError;
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import com.android.volley.Request;
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import com.android.volley.RequestQueue;
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import com.android.volley.Response;
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import com.android.volley.VolleyError;
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import com.android.volley.toolbox.StringRequest;
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import com.android.volley.toolbox.Volley;
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import org.json.JSONException;
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import org.json.JSONObject;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import static android.Manifest.permission.READ_CONTACTS;
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/**
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* A login screen that offers login via name/password.
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* 通过账号/密码提供登录的登录屏幕。
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*/
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public class LoginActivity extends AppCompatActivity implements LoaderCallbacks<Cursor> {
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/**
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* Id to identity READ_CONTACTS permission request.
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* ID来标识READ_CONTACTS权限请求。
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*/
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private static final int REQUEST_READ_CONTACTS = 0;
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/**
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* A dummy authentication store containing known user names and passwords.
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* 包含已知用户名和密码的虚假认证存储。
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* TODO: remove after connecting to a real authentication system.
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* 连接到真实身份验证系统后删除。
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*/
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private static final String[] DUMMY_CREDENTIALS = new String[]{
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"foo@example.com:hello", "bar@example.com:world",
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//DUMMY_CREDENTTALS用于模拟已存在的账户，冒号前为账户，冒号后为密码
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};
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/**
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* Keep track of the login task to ensure we can cancel it if requested.
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* 跟踪登录任务以确保我们可以根据请求取消它。
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*/
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private UserLoginTask mAuthTask = null;
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// UI references.
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private AutoCompleteTextView mUserNameView;
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private EditText mPasswordView;
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private View mProgressView;
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private View mLoginFormView;
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private SharedPreferences preferences;
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private SharedPreferences.Editor editor;
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//记住密码
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private CheckBox rememberPass;
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//自动登录
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private CheckBox autoLogin;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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if (Build.VERSION.SDK_INT >= 21) {
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View decorView = getWindow().getDecorView();
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decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
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| View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
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getWindow().setStatusBarColor(Color.TRANSPARENT);
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}
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_login);
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preferences = PreferenceManager.getDefaultSharedPreferences(this);
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// Set up the login form. 设置登录表单
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rememberPass = (CheckBox) findViewById(R.id.remember_pass);
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autoLogin = (CheckBox) findViewById(R.id.auto_login);
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//账号输入
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mUserNameView = (AutoCompleteTextView) findViewById(R.id.UserName);
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populateAutoComplete();
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//密码输入
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mPasswordView = (EditText) findViewById(R.id.password);
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mPasswordView.setOnEditorActionListener(new TextView.OnEditorActionListener() {
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@Override
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public boolean onEditorAction(TextView textView, int id, KeyEvent keyEvent) {
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if (id == EditorInfo.IME_ACTION_DONE || id == EditorInfo.IME_NULL) {
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attemptLogin();
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return true;
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}
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return false;
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}
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});
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//记住密码
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boolean isRemember = preferences.getBoolean("remember_password",false);
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boolean isAutoLogin = preferences.getBoolean("auto_Login",false);
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if(isRemember ) {
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//将账户和密码都设置到文本框中
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String account = preferences.getString("UserName", "");
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String password = preferences.getString("password", "");
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mUserNameView.setText(account);
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mPasswordView.setText(password);
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rememberPass.setChecked(true);
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//自动登录
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if (isAutoLogin) {
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Intent intent = new Intent(LoginActivity.this, MainActivity.class);
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LoginActivity.this.startActivity(intent);
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Toast.makeText(getApplicationContext(), "自动登录", Toast.LENGTH_SHORT).show();
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}
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}
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//登录按钮
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Button mUserNameSignInButton = (Button) findViewById(R.id.UserName_sign_in_button);
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mUserNameSignInButton.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View view) {
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attemptLogin();
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}
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});
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//注册按钮
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Button register = (Button) findViewById(R.id.register);
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register.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View view) {
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Intent intent = new Intent(LoginActivity.this,registerActivity.class);
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startActivity(intent);
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}
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});
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//方法最后两个mLoginFormView和mProgressView是用于获取显示的View，
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//在登陆的时候可以进行登陆窗口gone，ProgressBar visible的操作。
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mLoginFormView = findViewById(R.id.login_form);
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mProgressView = findViewById(R.id.login_progress);
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}
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//先是通过mayRequestContacts判断是否继续执行，若通过判断则初始化Loaders，通过Loaders后台异步读取用户的账户信息。
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private void populateAutoComplete() {
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if (!mayRequestContacts()) {
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return;
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}
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getLoaderManager().initLoader(0, null, this);
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}
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//这个方法是用于请求用户以获取读取账户的权限，主要是为了适配6.0新的权限机制
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private boolean mayRequestContacts() {
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if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
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return true;
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}
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if (checkSelfPermission(READ_CONTACTS) == PackageManager.PERMISSION_GRANTED) {
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return true;
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}
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if (shouldShowRequestPermissionRationale(READ_CONTACTS)) {
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Snackbar.make(mUserNameView, R.string.permission_rationale, Snackbar.LENGTH_INDEFINITE)
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.setAction(android.R.string.ok, new View.OnClickListener() {
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@Override
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@TargetApi(Build.VERSION_CODES.M)
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public void onClick(View v) {
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requestPermissions(new String[]{READ_CONTACTS}, REQUEST_READ_CONTACTS);
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}
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});
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} else {
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requestPermissions(new String[]{READ_CONTACTS}, REQUEST_READ_CONTACTS);
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}
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return false;
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}
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/**
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* Callback received when a permissions request has been completed.
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* 当权限请求已完成时收到回调。
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*/
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@Override
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public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
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@NonNull int[] grantResults) {
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if (requestCode == REQUEST_READ_CONTACTS) {
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if (grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
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populateAutoComplete();
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}
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}
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}
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/**
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* Attempts to sign in or register the account specified by the login form.
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* 尝试登录或注册登录表单指定的帐户。
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* If there are form errors (invalid UserName, missing fields, etc.), the
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* 如果有表单错误（无效的电子邮件，缺少字段等）
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* errors are presented and no actual login attempt is made.
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* 出现错误并且没有进行实际的登录尝试。
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*/
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private void attemptLogin() {
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if (mAuthTask != null) {
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return;
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}
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// Reset errors.重置错误。
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mUserNameView.setError(null);
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mPasswordView.setError(null);
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// Store values at the time of the login attempt.在登录尝试时存储值。
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String UserName = mUserNameView.getText().toString();
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String password = mPasswordView.getText().toString();
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editor = preferences.edit();
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if(autoLogin.isChecked()){
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editor.putBoolean("auto_Login",true);
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}
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if (rememberPass.isChecked()) {
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editor.putBoolean("remember_password", true);
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editor.putString("UserName", UserName);
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editor.putString("password", password);
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} else {
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editor.clear();
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}
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editor.apply();
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boolean cancel = false;
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View focusView = null;
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// Check for a valid password, if the user entered one.如果用户输入密码，请检查有效的密码。
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if (!TextUtils.isEmpty(password) && !isPasswordValid(password)) {
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mPasswordView.setError(getString(R.string.error_invalid_password));
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focusView = mPasswordView;
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cancel = true;
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}
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// Check
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if (TextUtils.isEmpty(UserName)) {
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mUserNameView.setError(getString(R.string.error_field_required));
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focusView = mUserNameView;
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cancel = true;
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} else if (!isUserNameValid(UserName)) {
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mUserNameView.setError(getString(R.string.error_invalid_UserName));
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focusView = mUserNameView;
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cancel = true;
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}
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if (cancel) {
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// There was an error; don't attempt login and focus the first
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//有一个错误;不要尝试登录并首先关注
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// form field with an error.
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//表单字段有错误。
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focusView.requestFocus();
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} else {
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// Show a progress spinner, and kick off a background task to
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//显示进度微调，并启动后台任务
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// perform the user login attempt.
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//执行用户登录尝试。
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showProgress(true);
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mAuthTask = new UserLoginTask(UserName, password);
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mAuthTask.execute((Void) null);
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}
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}
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private boolean isUserNameValid(String UserName) {
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//TODO: Replace this with your own logic 用你自己的逻辑代替这个
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return UserName.contains("@");
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}
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private boolean isPasswordValid(String password) {
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//TODO: Replace this with your own logic 用你自己的逻辑代替这个
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return password.length() > 4;
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}
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/**
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* Shows the progress UI and hides the login form.
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* 显示进度UI并隐藏登录表单。
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*/
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@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
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private void showProgress(final boolean show) {
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// On Honeycomb MR2 we have the ViewPropertyAnimator APIs, which allow
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// for very easy animations. If available, use these APIs to fade-in
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// the progress spinner.
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
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int shortAnimTime = getResources().getInteger(android.R.integer.config_shortAnimTime);
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mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE);
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mLoginFormView.animate().setDuration(shortAnimTime).alpha(
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show ? 0 : 1).setListener(new AnimatorListenerAdapter() {
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@Override
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public void onAnimationEnd(Animator animation) {
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mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE);
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}
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});
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mProgressView.setVisibility(show ? View.VISIBLE : View.GONE);
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mProgressView.animate().setDuration(shortAnimTime).alpha(
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show ? 1 : 0).setListener(new AnimatorListenerAdapter() {
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@Override
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public void onAnimationEnd(Animator animation) {
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mProgressView.setVisibility(show ? View.VISIBLE : View.GONE);
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}
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});
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} else {
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// The ViewPropertyAnimator APIs are not available, so simply show
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// and hide the relevant UI components.
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//ViewPropertyAnimator API不可用，因此只需显示和隐藏相关的UI组件。
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mProgressView.setVisibility(show ? View.VISIBLE : View.GONE);
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mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE);
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}
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}
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@Override
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public Loader<Cursor> onCreateLoader(int i, Bundle bundle) {
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return new CursorLoader(this,
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// Retrieve data rows for the device user's 'profile' contact.
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//检索设备用户的“个人资料”联系人的数据行。
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Uri.withAppendedPath(ContactsContract.Profile.CONTENT_URI,
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ContactsContract.Contacts.Data.CONTENT_DIRECTORY), ProfileQuery.PROJECTION,
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ContactsContract.Contacts.Data.MIMETYPE +
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" = ?", new String[]{ContactsContract.CommonDataKinds.UserName
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.CONTENT_ITEM_TYPE},
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ContactsContract.Contacts.Data.IS_PRIMARY + " DESC");
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}
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@Override
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public void onLoadFinished(Loader<Cursor> cursorLoader, Cursor cursor) {
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List<String> UserNames = new ArrayList<>();
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cursor.moveToFirst();
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while (!cursor.isAfterLast()) {
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UserNames.add(cursor.getString(ProfileQuery.ADDRESS));
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cursor.moveToNext();
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}
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addUserNamesToAutoComplete(UserNames);
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}
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@Override
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public void onLoaderReset(Loader<Cursor> cursorLoader) {
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}
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private void addUserNamesToAutoComplete(List<String> UserNameAddressCollection) {
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//Create adapter to tell the AutoCompleteTextView what to show in its dropdown list.
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//创建适配器以告诉AutoCompleteTextView在其下拉列表中显示什么。
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ArrayAdapter<String> adapter =
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new ArrayAdapter<>(LoginActivity.this,
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android.R.layout.simple_dropdown_item_1line, UserNameAddressCollection);
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mUserNameView.setAdapter(adapter);
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}
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private interface ProfileQuery {
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String[] PROJECTION = {
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ContactsContract.CommonDataKinds.UserName.ADDRESS,
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ContactsContract.CommonDataKinds.UserName.IS_PRIMARY,
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};
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int ADDRESS = 0;
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int IS_PRIMARY = 1;
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}
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/**
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* Represents an asynchronous login/registration task used to authenticate
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* the user.
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* 表示用于验证用户的异步登录/注册任务。
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*/
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public class UserLoginTask extends AsyncTask<Void, Void, Boolean> {
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private final String mUserName;
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private final String mPassword;
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UserLoginTask(String UserName, String password) {
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mUserName = UserName;
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mPassword = password;
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}
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@Override
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protected Boolean doInBackground(Void... params) {
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// TODO: attempt authentication against a network service.
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//尝试对网络服务进行身份验证。
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try {
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LoginRequest(mUserName,mPassword);
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|
|
|
|
// Simulate network access.模拟网络访问。
|
|
|
Thread.sleep(3000);
|
|
|
} catch (InterruptedException e) {
|
|
|
return false;
|
|
|
}
|
|
|
|
|
|
for (String credential : DUMMY_CREDENTIALS) {
|
|
|
String[] pieces = credential.split(":");
|
|
|
if (pieces[0].equals(mUserName)) {
|
|
|
// Account exists, return true if the password matches.
|
|
|
//帐户存在，如果密码匹配则返回true。
|
|
|
return pieces[1].equals(mPassword);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
// TODO: register the new account here.
|
|
|
//在此注册新帐户。
|
|
|
return true;
|
|
|
}
|
|
|
|
|
|
@Override
|
|
|
protected void onPostExecute(final Boolean success) {
|
|
|
mAuthTask = null;
|
|
|
showProgress(false);
|
|
|
|
|
|
if (success) {
|
|
|
/*
|
|
|
Intent intent = new Intent(LoginActivity.this,MainActivity.class);
|
|
|
startActivity(intent);
|
|
|
finish();
|
|
|
*/
|
|
|
} else {
|
|
|
mPasswordView.setError(getString(R.string.error_incorrect_password));
|
|
|
mPasswordView.requestFocus();
|
|
|
}
|
|
|
}
|
|
|
|
|
|
@Override
|
|
|
protected void onCancelled() {
|
|
|
mAuthTask = null;
|
|
|
showProgress(false);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
public void LoginRequest(final String account, final String password) {
|
|
|
//请求地址
|
|
|
String url = "http://8.130.38.15:8080/Whoere/LoginServlet?account="+account+"&password="+password;
|
|
|
String tag = "Login";
|
|
|
|
|
|
//取得请求队列
|
|
|
RequestQueue requestQueue = Volley.newRequestQueue(getApplicationContext());
|
|
|
|
|
|
//防止重复请求，所以先取消tag标识的请求队列
|
|
|
requestQueue.cancelAll(tag);
|
|
|
|
|
|
//创建StringRequest，定义字符串请求的请求方式为POST(省略第一个参数会默认为GET方式)
|
|
|
final StringRequest request = new StringRequest(Request.Method.POST, url,
|
|
|
new Response.Listener<String>() {
|
|
|
//@Override
|
|
|
public void onResponse(String response) {
|
|
|
try {
|
|
|
JSONObject jsonObject = (JSONObject) new JSONObject(response).get("params");
|
|
|
String result = jsonObject.getString("Result");
|
|
|
if (result.equals("success")) {
|
|
|
//做自己的登录成功操作，如页面跳转
|
|
|
Intent intent = new Intent(LoginActivity.this,MainActivity.class);
|
|
|
startActivity(intent);
|
|
|
Toast.makeText(LoginActivity.this,"欢迎!",Toast.LENGTH_LONG).show();
|
|
|
} else {
|
|
|
if (result.equals("failed"))
|
|
|
Toast.makeText(LoginActivity.this,"账户或密码错误！",Toast.LENGTH_SHORT).show();
|
|
|
}
|
|
|
} catch (JSONException e) {
|
|
|
//做自己的请求异常操作，如Toast提示（“无网络连接”等）
|
|
|
Log.e("TAG", e.getMessage(), e);
|
|
|
}
|
|
|
}
|
|
|
}, new Response.ErrorListener() {
|
|
|
//@Override
|
|
|
public void onErrorResponse(VolleyError error) {
|
|
|
//做自己的响应错误操作，如Toast提示（“请稍后重试”等）
|
|
|
Log.e("TAG", error.getMessage(), error);
|
|
|
}
|
|
|
}) {
|
|
|
@Override
|
|
|
protected Map<String, String> getParams() {
|
|
|
Map<String, String> params = new HashMap<>();
|
|
|
params.put("Account", account);
|
|
|
params.put("Password", password);
|
|
|
return params;
|
|
|
}
|
|
|
};
|
|
|
|
|
|
//设置Tag标签
|
|
|
request.setTag(tag);
|
|
|
|
|
|
//将请求添加到队列中
|
|
|
requestQueue.add(request);
|
|
|
}
|
|
|
} |
