我的问题是这个问题here的扩展,但是在这个问题中,我添加了两个函数：
>共享首选项
>记住我的功能(复选框)
目前,我设法使用/不使用记住我的复选框登录,并打算从MysqL数据库中获取其余的JsON对象.
但是问题出在LoginActivity.java PART A块内部.当我重新启动/重建应用程序时,意图数据为空,它不会存储并发送到下一个活动中.数据自动登录后,无法存储并发送到下一个活动.如下代码
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 one rrorResponse(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Logcat
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: x8608-22 16:50:28.822 21022-21029/? I/art: DeBUGger is no longer active08-22 16:50:28.822 21022-21029/? I/art: Starting a blocking GC Instrumentation08-22 16:50:28.895 21022-21022/? W/System: ClassLoader referenced unkNown path: /data/app/com.app.test-2/lib/x8608-22 16:50:28.901 21022-21022/? I/InstantRun: starting instant run server: is main process08-22 16:50:29.129 21022-21040/? I/Openglrenderer: Initialized EGL, version 1.408-22 16:50:29.129 21022-21040/? D/Openglrenderer: Swap behavior 108-22 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 008-22 16:50:29.133 21022-21040/? D/EGL_emulation: eglCreateContext: 0xb3305060: maj 2 min 0 rcv 208-22 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.Drawable08-22 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.ListVIEw08-22 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 inputConnection08-22 16:50:46.163 21022-21022/com.app.test D/com.app.test.LoginActivity: Check flag is = true08-22 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 in08-22 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: ID00108-22 16:50:47.825 21022-21022/com.app.test D/com.app.test.LoginActivity: 12308-22 16:50:47.982 21022-21025/com.app.test I/art: Do partial code cache collection, code=29KB, data=30KB08-22 16:50:47.982 21022-21025/com.app.test I/art: After code cache collection, code=29KB, data=30KB08-22 16:50:47.982 21022-21025/com.app.test I/art: Increasing code cache capacity to 128KB08-22 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: x8608-22 16:54:32.694 24710-24710/com.app.test W/System: ClassLoader referenced unkNown path: /data/app/com.app.test-2/lib/x8608-22 16:54:32.699 24710-24710/com.app.test I/InstantRun: starting instant run server: is main process08-22 16:54:34.256 24710-24811/com.app.test I/Openglrenderer: Initialized EGL, version 1.408-22 16:54:34.257 24710-24811/com.app.test D/Openglrenderer: Swap behavior 108-22 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 008-22 16:54:34.258 24710-24811/com.app.test D/EGL_emulation: eglCreateContext: 0xb3305360: maj 2 min 0 rcv 208-22 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.Drawable08-22 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.ListVIEw08-22 16:54:35.299 24710-24811/com.app.test D/EGL_emulation: eglMakeCurrent: 0xb3305360: ver 2 0 (tinfo 0xb3303200)感谢有人可以提供帮助.谢谢.
解决方法:
根据我对问题的理解,您希望数据被存储并打算在下一次自动登录时进入下一个活动(在A部分内部).
在根据您上面的代码从头开始尝试之后,我假设您的“ isLoggedIn”来自其他活动文件.
您只需要将布尔值“ isLoggedIn”更改为false,因为每当用户记住我登录时,它都会存储sharedPreferences数据并将其用于下一个活动.
与不记得我的登录相同,它存储了sharedPreferences数据,但isLoggedIn为false.因此,当您的应用重新启动或重建时,它将不再自动登录.当“ isLoggedIn”为false时,请不要忘记清除并提交sharedPreferences.
这是代码.
LoginActivity.java
if(checkRememberMe){ // Data added } 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"); 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", false); 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(); }}在NextActivity.java中,添加sharedPreferences并将其设置为String.
sharedPreferences sharedPreferences = getSharedPreferences("login.conf", Context.MODE_PRIVATE);final String accessdb = sharedPreferences.getString("access","");final String pwdb = sharedPreferences.getString("pw","");final String fullnamedb = sharedPreferences.getString("fullname","");final String branchdb = sharedPreferences.getString("branch","");final String sectiondb = sharedPreferences.getString("section","");Intent intent = getIntent();String access_db = intent.getStringExtra("access");String pw_db = intent.getStringExtra("pw");String fullname_db = intent.getStringExtra("fullname");String branch_db = intent.getStringExtra("branch");String section_db = intent.getStringExtra("section");Toast.makeText(getApplicationContext(), "access is = " + accessdb, Toast.makeText.LENGTH_SHORT).show();以上是内存溢出为你收集整理的如何使用Android Studio中的PostResponseAsyncTask将SharedPreferences设置为下一个活动值？全部内容，希望文章能够帮你解决如何使用Android Studio中的PostResponseAsyncTask将SharedPreferences设置为下一个活动值？所遇到的程序开发问题。
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