android - 如何在 Android Studio 中使用 PostResponseAsyncTask 将 SharedPreferences 设置为下一个 Activity 值？

Question

我的问题是这个问题的扩展 here但在这个问题中我添加了两个函数:

1. 共享首选项
2. 记住我功能(复选框)

目前，我设法在有/没有记住我复选框的情况下登录，并打算从 mysql 数据库中获取其余的 JSON 对象。

但问题出在 LoginActivity.java PART A block 内部。当我重新启动/重建应用程序时， Intent 数据为空，不会存储并发送到下一个 Activity 。自动登录时，数据无法存储和发送到下一个 Activity 。代码如下

JSON 对象

{
    "access":"PA001",
    "password":"123",
    "fullname":"ARCADE",
    "branch":"HQ",
    "section":"MPR"
}

access.php

<?php
    $conn = mysqli_connect("","","","");
    if(
        isset($_POST['access']) &&
        isset($_POST['password'])
    ){
        $access     = $_POST['access'];
        $password   = $_POST['password'];
        $sql = "SELECT * FROM table WHERE access = '$access' AND password = '$password' ";
        $result = mysqli_query($conn, $sql);
        if($result && mysqli_num_rows($result) > 0){
            while($row = mysqli_fetch_array($result)){

                $accessdb     = $row['access'];
                $passworddb   = $row['password'];
                $fullnamedb   = $row['fullname'];
                $branchdb     = $row['branch'];
                $sectiondb    = $row['section'];

                echo "success_access";

                $response = array('access' => $accessdb, 'password' => $passworddb, 'fullname' => $fullnamedb, 'branch' => $branchdb, 'section' => $sectiondb);
                echo json_encode($response);
            }
        mysqli_free_result($result);
        } else {
            echo "access_failed";
        }
    }
?>

LoginActivity.java

public class LoginActivity extends AppCompatActivity implements CompoundButton.OnCheckedChangeListener {

    final String TAG = this.getClass().getName();
    SharedPreferences sharedPreferences;
    SharedPreferences.Editor editor;

    EditText etLogin, etPassword;
    CheckBox cbRememberMe;
    Button bLogin;
    boolean checkRememberMe;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);


        etLogin         = (EditText)findViewById(R.id.etLogin);
        etPassword      = (EditText)findViewById(R.id.etPassword);
        cbRememberMe    = (CheckBox)findViewById(R.id.cbRememberMe);
        cbRememberMe.setOnCheckedChangeListener(this);
        checkRememberMe = cbRememberMe.isChecked();

        sharedPreferences = getSharedPreferences("login.conf", Context.MODE_PRIVATE);
        editor = sharedPreferences.edit();

        //////////////////////////////////////// PART A /////////////////////////////////////
        final String  accessdb   = sharedPreferences.getString("access", "");
        final String  passworddb = sharedPreferences.getString("password", "");
        final String  fullnamedb = sharedPreferences.getString("fullname", "");
        final String  branchdb   = sharedPreferences.getString("branch", "");
        final String  sectiondb  = sharedPreferences.getString("branch", "");
        final HashMap data = new HashMap();

        data.put("access", accessdb);
        data.put("password", passworddb);
        data.put("fullname", fullnamedb);
        data.put("branch", branchdb);
        data.put("section", sectiondb);
        if(!(accessdb.contains("") && passworddb.contains("") && fullnamedb.contains("") && branchdb.contains("") && sectiondb.contains(""))){
            PostResponseAsyncTask task = new PostResponseAsyncTask(LoginActivity.this, data, new AsyncResponse() {
                @Override
                public void processFinish(String s) {
                    // edited here ,add Log
                    Log.d(TAG, "processFinish : " + s);
                    String responseToJSONObject = s.substring(s.indexOf("{"));
                    if(s.contains("success_access")){

                        try {
                            JSONObject jsonObject = new JSONObject(responseToJSONObject);

                            final String logindb    = jsonObject.getString("login");
                            final String pwdb       = jsonObject.getString("pw");
                            final String realnamedb = jsonObject.getString("real_name");
                            final String deptdb     = jsonObject.getString("dept");

                            Intent intent = new Intent(LoginActivity.this, NextActivity.class);
                            intent.putExtra("login", logindb);
                            intent.putExtra("pw", pwdb);
                            intent.putExtra("real_name", realnamedb);
                            intent.putExtra("dept", deptdb);
                            LoginActivity.this.startActivity(intent);

                        } catch (JSONException e) {
                            e.printStackTrace();
                        }

                    }
                }
            });
            task.execute("http://localhost/login.php");
        }
        //////////////////////////////////////// PART A /////////////////////////////////////

        bLogin          = (Button)findViewById(R.id.bLogin);
        bLogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String url = "http://localhost/login.php";
                StringRequest stringRequest = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        // edited here ,add Log
                        Log.d(TAG, "onResponse : " + response);
                        if(response.contains("success_access")){
                            String resp = response.substring(response.indexOf("{"));

                            // LOGIN WITH CHECK REMEMBER ME
                            if(checkRememberMe){
                                try {
                                    JSONObject jsonObject      = new JSONObject(resp);
                                    final String accessdb      = jsonObject.getString("access");
                                    final String passworddb    = jsonObject.getString("password");
                                    final String fullnamedb    = jsonObject.getString("fullname");
                                    final String branchdb      = jsonObject.getString("branch");
                                    final String sectiondb     = jsonObject.getString("section");

                                    editor.putString("access", etLogin.getText().toString());
                                    editor.putString("password", etPassword.getText().toString());
                                    editor.putString("fullname", fullnamedb);
                                    editor.putString("branch", branchdb);
                                    editor.putString("section", sectiondb);
                                    editor.putBoolean("isLoggedIn", true);
                                    editor.apply();

                                    Intent intent = new Intent(LoginActivity.this, NextActivity.class);
                                    intent.putExtra("access", accessdb);
                                    intent.putExtra("password", passworddb);
                                    intent.putExtra("fullname", fullnamedb);
                                    intent.putExtra("branch", branchdb);
                                    intent.putExtra("section", sectiondb);
                                    LoginActivity.this.startActivity(intent);

                                } catch (JSONException e) {
                                    e.printStackTrace();
                                }

                            }
                            // LOGIN WITH CHECK REMEMBER ME

                            // LOGIN WITHOUT CHECK REMEMBER ME
                            else {
                                try {
                                    JSONObject jsonObject = new JSONObject(resp);

                                    final String accessdb        = jsonObject.getString("access");
                                    final String passworddb      = jsonObject.getString("password");
                                    final String fullnamedb      = jsonObject.getString("fullname");
                                    final String branchdb        = jsonObject.getString("branch");
                                    final String sectiondb       = jsonObject.getString("section");   

                                    Intent intent = new Intent(LoginActivity.this, NextActivity.class);
                                    intent.putExtra("access", accessdb);
                                    intent.putExtra("password", passworddb);
                                    intent.putExtra("fullname", fullnamedb);
                                    intent.putExtra("branch", branchdb);
                                    intent.putExtra("section", sectiondb);
                                    LoginActivity.this.startActivity(intent);

                                } catch (JSONException e) {
                                    e.printStackTrace();
                                }
                            }
                            // LOGIN WITHOUT CHECK REMEMBER ME

                        } else{
                            Toast.makeText(getApplicationContext(), "Error" , Toast.LENGTH_SHORT).show();
                        }
                    }
                }, new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        Toast.makeText(getApplicationContext(), "Error" , Toast.LENGTH_SHORT).show();
                    }
                }){
                    @Override
                    protected Map<String, String> getParams() throws AuthFailureError {
                        Map<String, String> params = new HashMap<>();
                        params.put("login", etLogin.getText().toString());
                        params.put("pw", etPassword.getText().toString());
                        return params;
                    }
                };
                MySingleton.getInstance(getApplicationContext()).addToRequestQueue(stringRequest);
            }
        });
    }

    @Override
    public void onCheckedChanged(CompoundButton compoundButton, boolean isChecked) {
        checkRememberMe = isChecked;
        Log.d(TAG, "Remember me is = " + checkRememberMe);
    }
}

编辑:

我的日志

08-22 16:50:28.802 21022-21022/? I/art: Not late-enabling -Xcheck:jni (already on)
08-22 16:50:28.802 21022-21022/? W/art: Unexpected CPU variant for X86 using defaults: x86
08-22 16:50:28.822 21022-21029/? I/art: Debugger is no longer active
08-22 16:50:28.822 21022-21029/? I/art: Starting a blocking GC Instrumentation
08-22 16:50:28.895 21022-21022/? W/System: ClassLoader referenced unknown path: /data/app/com.app.test-2/lib/x86
08-22 16:50:28.901 21022-21022/? I/InstantRun: starting instant run server: is main process
08-22 16:50:29.129 21022-21040/? I/OpenGLRenderer: Initialized EGL, version 1.4
08-22 16:50:29.129 21022-21040/? D/OpenGLRenderer: Swap behavior 1
08-22 16:50:29.130 21022-21040/? W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
08-22 16:50:29.130 21022-21040/? D/OpenGLRenderer: Swap behavior 0
08-22 16:50:29.133 21022-21040/? D/EGL_emulation: eglCreateContext: 0xb3305060: maj 2 min 0 rcv 2
08-22 16:50:29.150 21022-21040/? D/EGL_emulation: eglMakeCurrent: 0xb3305060: ver 2 0 (tinfo 0xb3303360)
08-22 16:50:29.156 21022-21040/? D/EGL_emulation: eglMakeCurrent: 0xb3305060: ver 2 0 (tinfo 0xb3303360)
08-22 16:50:29.964 21022-21022/com.app.test W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
08-22 16:50:30.037 21022-21022/com.app.test W/art: Before Android 4.1, method int android.support.v7.widget.ListViewCompat.lookForSelectablePosition(int, boolean) would have incorrectly overridden the package-private method in android.widget.ListView
08-22 16:50:30.040 21022-21040/com.app.test D/EGL_emulation: eglMakeCurrent: 0xb3305060: ver 2 0 (tinfo 0xb3303360)
08-22 16:50:44.279 21022-21022/com.app.test W/IInputConnectionWrapper: finishComposingText on inactive InputConnection
08-22 16:50:46.163 21022-21022/com.app.test D/com.app.test.LoginActivity: Check flag is = true
08-22 16:50:47.820 21022-21323/com.app.test D/NetworkSecurityConfig: No Network Security Config specified, using platform default


// LOG.d after i logged in with remember me check in
08-22 16:50:47.824 21022-21022/com.app.test E/com.app.test.LoginActivity: Response is    = success_access{"access":"ID001","password":"1233","fullname":"ARCADE","branch":"HQ", "section":"MPR"}
08-22 16:50:47.825 21022-21022/com.app.test E/com.app.test.LoginActivity: JSON Object is = {"access":"ID001","password":"1233","fullname":"ARCADE","branch":"HQ", "section":"MPR"}

08-22 16:50:47.825 21022-21022/com.app.test D/com.app.test.LoginActivity: ID001
08-22 16:50:47.825 21022-21022/com.app.test D/com.app.test.LoginActivity: 123
08-22 16:50:47.982 21022-21025/com.app.test I/art: Do partial code cache collection, code=29KB, data=30KB
08-22 16:50:47.982 21022-21025/com.app.test I/art: After code cache collection, code=29KB, data=30KB
08-22 16:50:47.982 21022-21025/com.app.test I/art: Increasing code cache capacity to 128KB
08-22 16:50:47.994 21022-21040/com.app.test D/EGL_emulation: eglMakeCurrent: 0xb3305060: ver 2 0 (tinfo 0xb3303360)
08-22 16:50:48.083 21022-21040/com.app.test D/EGL_emulation: eglMakeCurrent: 0xb3305060: ver 2 0 (tinfo 0xb3303360)
08-22 16:50:48.100 21022-21040/com.app.test D/EGL_emulation: eglMakeCurrent: 0xb3305060: ver 2 0 (tinfo 0xb3303360)
08-22 16:50:48.135 21022-21022/com.app.test W/IInputConnectionWrapper: finishComposingText on inactive InputConnection


// LOG.d when I restarted apps without logout. 
08-22 16:54:32.607 24710-24710/? I/art: Not late-enabling -Xcheck:jni (already on)
08-22 16:54:32.607 24710-24710/? W/art: Unexpected CPU variant for X86 using defaults: x86
08-22 16:54:32.694 24710-24710/com.app.test W/System: ClassLoader referenced unknown path: /data/app/com.app.test-2/lib/x86
08-22 16:54:32.699 24710-24710/com.app.test I/InstantRun: starting instant run server: is main process
08-22 16:54:34.256 24710-24811/com.app.test I/OpenGLRenderer: Initialized EGL, version 1.4
08-22 16:54:34.257 24710-24811/com.app.test D/OpenGLRenderer: Swap behavior 1
08-22 16:54:34.257 24710-24811/com.app.test W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
08-22 16:54:34.257 24710-24811/com.app.test D/OpenGLRenderer: Swap behavior 0
08-22 16:54:34.258 24710-24811/com.app.test D/EGL_emulation: eglCreateContext: 0xb3305360: maj 2 min 0 rcv 2
08-22 16:54:34.266 24710-24811/com.app.test D/EGL_emulation: eglMakeCurrent: 0xb3305360: ver 2 0 (tinfo 0xb3303200)
08-22 16:54:34.274 24710-24811/com.app.test D/EGL_emulation: eglMakeCurrent: 0xb3305360: ver 2 0 (tinfo 0xb3303200)
08-22 16:54:35.124 24710-24710/com.app.test W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
08-22 16:54:35.292 24710-24710/com.app.test W/art: Before Android 4.1, method int android.support.v7.widget.ListViewCompat.lookForSelectablePosition(int, boolean) would have incorrectly overridden the package-private method in android.widget.ListView
08-22 16:54:35.299 24710-24811/com.app.test D/EGL_emulation: eglMakeCurrent: 0xb3305360: ver 2 0 (tinfo 0xb3303200)

感谢有人能提供帮助。谢谢。

Answer 1

试试这个。

public class SharedPreferenceUtils {

private static final String SP_NAME = "sp";
public static final String ACCESS = "access";
public static final String FULL_NAME = "fullname";
public static final String BRANCH = "branch";
public static final String SECTION = "section";
public static final String IS_LOGGED_IN = "isLoggedIn";


// create
public static boolean createSP(Context context, String access, String fullname, String branch, String section, boolean isLoggedIn) {
    SharedPreferences.Editor editor = context.getSharedPreferences("login.conf", Context.MODE_PRIVATE).edit();
    editor.putString(ACCESS, access);
    editor.putString(FULL_NAME, fullname);
    editor.putString(BRANCH, branch);
    editor.putString(SECTION, section);
    editor.putBoolean(IS_LOGGED_IN, isLoggedIn);
    return editor.commit();
}

// clear
public static void clearSP(Context context) {
    SharedPreferences sharedPreferences = context.getSharedPreferences(SP_NAME, Context.MODE_PRIVATE);
    SharedPreferences.Editor editor = sharedPreferences.edit();
    editor.clear().apply();
}

// get access info
public static String getAccess(Context context) {
    SharedPreferences sp = context.getSharedPreferences(SP_NAME, Context.MODE_PRIVATE);
    return sp.getString(ACCESS, "");
}
// get branch info
public static String getFullName(Context context) {
    SharedPreferences sp = context.getSharedPreferences(SP_NAME, Context.MODE_PRIVATE);
    return sp.getString(FULL_NAME, "");
}

// get fullname info
public static String getBranch(Context context) {
    SharedPreferences sp = context.getSharedPreferences(SP_NAME, Context.MODE_PRIVATE);
    return sp.getString(BRANCH, "");
}

// get section info
public static String getSection(Context context) {
    SharedPreferences sp = context.getSharedPreferences(SP_NAME, Context.MODE_PRIVATE);
    return sp.getString(SECTION, "");
}

// get isLoggedIn info
public static boolean getIsLoggedIn(Context context) {
    SharedPreferences sp = context.getSharedPreferences(SP_NAME, Context.MODE_PRIVATE);
    return sp.getBoolean(ACCESS, false);
}

}

并在您的代码中。

// edited here
final String  accessdb   = SharedPreferenceUtils.getAccess(this);
final String  fullnamedb = SharedPreferenceUtils.getFullName(this);
final String  branchdb   = SharedPreferenceUtils.getBranch(this);
final String  sectiondb  = SharedPreferenceUtils.getSection(this);
final HashMap data = new HashMap();

data.put("access", accessdb);
data.put("password", passworddb);
data.put("fullname", fullnamedb);
data.put("branch", branchdb);
data.put("section", sectiondb);

如果是记住

if(checkRememberMe){
        SharedPreferenceUtils.createSP(LoginActivity.this,etLogin.getText().toString(),fullnamedb,branchdb,sectiondb,true);
}