java - i want to move from one activity to the other help me i am new user? -
this manifest file
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.virasatsolutions.www.donapp"> <!-- auto-complete email text field in login form user's emails --> <uses-permission android:name="android.permission.get_accounts" /> <uses-permission android:name="android.permission.read_profile" /> <uses-permission android:name="android.permission.read_contacts" /> <application android:allowbackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsrtl="true" android:theme="@style/apptheme" > <activity android:name=".loginactivity" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.main" /> <category android:name="android.intent.category.launcher" /> </intent-filter> </activity> <activity android:name=".mainactivity" android:label="@string/title_activity_main"> <intent-filter> <action android:name="android.intent.action.mainactivity" /> <category android:name="android.intent.category.launcher" /> </intent-filter> </activity> <activity android:name=".donation" android:label="@string/title_activity_donation" android:theme="@style/apptheme.noactionbar" /> <activity android:name=".sign_up" android:label="@string/title_sign_up"> <intent-filter> <action android:name="android.intent.action.sign_up" /> <category android:name="android.intent.category.launcher" /> </intent-filter> </activity> </application> </manifest> // layout want move after login code login activity dummy login
<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingbottom="@dimen/activity_vertical_margin" android:paddingleft="@dimen/activity_horizontal_margin" android:paddingright="@dimen/activity_horizontal_margin" android:paddingtop="@dimen/activity_vertical_margin" app:layout_behavior="@string/appbar_scrolling_view_behavior" tools:context=".mainactivity" tools:showin="@layout/activity_main" android:background="#1f874e" > <tabhost android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/tabhost" android:layout_weight="1"> <linearlayout android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <tabwidget android:id="@android:id/tabs" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margintop="-20dp"> </tabwidget> <framelayout android:id="@android:id/tabcontent" android:layout_width="match_parent" android:layout_height="match_parent"> <relativelayout android:id="@+id/donate" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:clickable="true" android:fadingedge="horizontal" > <radiogroup android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignparentstart="true" android:layout_alignparentleft="true" android:id="@+id/dongroup" android:layout_margintop="20dp"> <radiobutton android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/school" android:id="@+id/radiobutton4" android:layout_gravity="center_vertical" android:layout_weight="1" /> <radiobutton android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/college" android:id="@+id/radiobutton3" android:layout_gravity="center_vertical" android:layout_weight="1" /> <radiobutton android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/ngo" android:id="@+id/radiobutton2" android:layout_gravity="center_vertical" android:layout_weight="1" /> <radiobutton android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/university" android:id="@+id/radiobutton" android:layout_gravity="center_vertical" android:layout_weight="1" /> </radiogroup> <spinner android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/spinner" android:layout_gravity="center_horizontal" android:layout_weight="1" android:layout_alignparentend="true" android:layout_alignparentright="true" android:layout_toendof="@+id/dongroup" android:layout_torightof="@+id/dongroup" android:layout_margintop="25dp"> </spinner> </relativelayout> <relativelayout android:id="@+id/donation_history" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:text="@string/donation_history"> </relativelayout> </framelayout> </linearlayout> </tabhost> </linearlayout> this loginactivity layout
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center_horizontal" android:orientation="vertical" android:paddingbottom="@dimen/activity_vertical_margin" android:paddingleft="@dimen/activity_horizontal_margin" android:paddingright="@dimen/activity_horizontal_margin" android:paddingtop="@dimen/activity_vertical_margin" tools:context="com.virasatsolutions.www.donapp.loginactivity" android:background="#1f874e" > <!-- login progress --> <progressbar android:id="@+id/login_progress" style="?android:attr/progressbarstylelarge" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginbottom="8dp" android:visibility="gone" /> <textview android:layout_width="wrap_content" android:layout_height="wrap_content" android:textappearance="?android:attr/textappearancelarge" android:text="login" android:id="@+id/textview5" android:layout_marginleft="-100dp" android:textsize="50dp"/> <scrollview android:id="@+id/login_form" android:layout_width="match_parent" android:layout_height="match_parent"> <linearlayout android:id="@+id/email_login_form" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:background="#72ce82" android:layout_margintop="100dp"> <android.support.design.widget.textinputlayout android:layout_width="match_parent" android:layout_height="wrap_content"> <autocompletetextview android:id="@+id/email" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="@string/prompt_email" android:inputtype="textemailaddress" android:maxlines="1" android:singleline="true" /> </android.support.design.widget.textinputlayout> <android.support.design.widget.textinputlayout android:layout_width="match_parent" android:layout_height="wrap_content"> <edittext android:id="@+id/password" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="@string/prompt_password" android:imeactionid="@+id/login" android:imeactionlabel="@string/action_sign_in_short" android:imeoptions="actionunspecified" android:inputtype="textpassword" android:maxlines="1" android:singleline="true" /> </android.support.design.widget.textinputlayout> <button android:id="@+id/email_sign_in_button" style="?android:textappearancesmall" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margintop="16dp" android:text="@string/action_sign_in" android:textstyle="bold" android:onclick="main"/> <button style="?android:attr/buttonstylesmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="sign up" android:id="@+id/button2" android:layout_gravity="center_horizontal" android:onclick="signup"/> </linearlayout> </scrollview> </linearlayout> // loginactivity... import android.animation.animator; import android.animation.animatorlisteneradapter; import android.annotation.targetapi; import android.content.intent; import android.content.pm.packagemanager; import android.support.annotation.nonnull; import android.support.design.widget.snackbar; import android.support.v7.app.appcompatactivity; import android.app.loadermanager.loadercallbacks; import android.content.cursorloader; import android.content.loader; import android.database.cursor; import android.net.uri; import android.os.asynctask; import android.os.build; import android.os.bundle; import android.provider.contactscontract; import android.text.textutils; import android.util.log; import android.view.keyevent; import android.view.view; import android.view.view.onclicklistener; import android.view.inputmethod.editorinfo; import android.widget.arrayadapter; import android.widget.autocompletetextview; import android.widget.button; import android.widget.edittext; import android.widget.textview; import java.util.arraylist; import java.util.list; import static android.manifest.permission.read_contacts; /** * login screen offers login via email/password. */ public class loginactivity extends appcompatactivity implements loadercallbacks<cursor> { /** * id identity read_contacts permission request. */ private static final int request_read_contacts = 0; /** * dummy authentication store containing known user names , passwords. * todo: remove after connecting real authentication system. */ private static final string[] dummy_credentials = new string[]{ "foo@example.com:hello", "bar@example.com:world" }; /** * keep track of login task ensure can cancel if requested. */ private userlogintask mauthtask = null; // ui references. private autocompletetextview memailview; private edittext mpasswordview; private view mprogressview; private view mloginformview; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_login); // set login form. memailview = (autocompletetextview) findviewbyid(r.id.email); populateautocomplete(); mpasswordview = (edittext) findviewbyid(r.id.password); mpasswordview.setoneditoractionlistener(new textview.oneditoractionlistener() { @override public boolean oneditoraction(textview textview, int id, keyevent keyevent) { if (id == r.id.login || id == editorinfo.ime_null) { attemptlogin(); return true; } return false; } }); button memailsigninbutton = (button) findviewbyid(r.id.email_sign_in_button); memailsigninbutton.setonclicklistener(new onclicklistener() { @override public void onclick(view view) { setcontentview(r.layout.activity_main); final button button = (button) findviewbyid(r.id.email_sign_in_button); button.setonclicklistener(new view.onclicklistener() { public void onclick(view v) { // perform action on click main(); } }); } }); mloginformview = findviewbyid(r.id.login_form); mprogressview = findviewbyid(r.id.login_progress); } private void populateautocomplete() { if (!mayrequestcontacts()) { return; } getloadermanager().initloader(0, null, this); } private boolean mayrequestcontacts() { if (build.version.sdk_int < build.version_codes.m) { return true; } if (checkselfpermission(read_contacts) == packagemanager.permission_granted) { return true; } if (shouldshowrequestpermissionrationale(read_contacts)) { snackbar.make(memailview, r.string.permission_rationale, snackbar.length_indefinite) .setaction(android.r.string.ok, new view.onclicklistener() { @override @targetapi(build.version_codes.m) public void onclick(view v) { requestpermissions(new string[]{read_contacts}, request_read_contacts); } }); } else { requestpermissions(new string[]{read_contacts}, request_read_contacts); } return false; } /** * callback received when permissions request has been completed. */ @override public void onrequestpermissionsresult(int requestcode, @nonnull string[] permissions, @nonnull int[] grantresults) { if (requestcode == request_read_contacts) { if (grantresults.length == 1 && grantresults[0] == packagemanager.permission_granted) { populateautocomplete(); } } } /** * attempts sign in or register account specified login form. * if there form errors (invalid email, missing fields, etc.), * errors presented , no actual login attempt made. */ private void attemptlogin() { if (mauthtask != null) { log.e("login task","login successfull"); return; } // reset errors. memailview.seterror(null); mpasswordview.seterror(null); // store values @ time of login attempt. string email = memailview.gettext().tostring(); string password = mpasswordview.gettext().tostring(); boolean cancel = false; view focusview = null; // check valid password, if user entered one. if (!textutils.isempty(password) && !ispasswordvalid(password)) { mpasswordview.seterror(getstring(r.string.error_invalid_password)); focusview = mpasswordview; cancel = true; } // check valid email address. if (textutils.isempty(email)) { memailview.seterror(getstring(r.string.error_field_required)); focusview = memailview; cancel = true; } else if (!isemailvalid(email)) { memailview.seterror(getstring(r.string.error_invalid_email)); focusview = memailview; cancel = true; } if (cancel) { // there error; don't attempt login , focus first // form field error. focusview.requestfocus(); } else { // show progress spinner, , kick off background task // perform user login attempt. showprogress(true); mauthtask = new userlogintask(email, password); mauthtask.execute((void) null); } }
// code want run
protected void main() { intent = new intent("android.intent.action.mainactivity"); startactivity(i); } protected void sign_up(view view) { if(view.getid()==r.id.button2) { intent = new intent("android.intent.action.sign_up"); startactivity(i); } } private boolean isemailvalid(string email) { //todo: replace own logic return email.contains("@"); }
private boolean ispasswordvalid(string password) { //todo: replace own logic return password.length() > 4; }
/** * shows progress ui , hides login form. */ @targetapi(build.version_codes.honeycomb_mr2) private void showprogress(final boolean show) { // on honeycomb mr2 have viewpropertyanimator apis, allow // easy animations. if available, use these apis fade-in // progress spinner. if (build.version.sdk_int >= build.version_codes.honeycomb_mr2) { int shortanimtime = getresources().getinteger(android.r.integer.config_shortanimtime); mloginformview.setvisibility(show ? view.gone : view.visible); mloginformview.animate().setduration(shortanimtime).alpha( show ? 0 : 1).setlistener(new animatorlisteneradapter() { @override public void onanimationend(animator animation) { mloginformview.setvisibility(show ? view.gone : view.visible); } }); mprogressview.setvisibility(show ? view.visible : view.gone); mprogressview.animate().setduration(shortanimtime).alpha( show ? 1 : 0).setlistener(new animatorlisteneradapter() { @override public void onanimationend(animator animation) { mprogressview.setvisibility(show ? view.visible : view.gone); } }); } else { // viewpropertyanimator apis not available, show // , hide relevant ui components. mprogressview.setvisibility(show ? view.visible : view.gone); mloginformview.setvisibility(show ? view.gone : view.visible); } }
@override public loader<cursor> oncreateloader(int i, bundle bundle) { return new cursorloader(this, // retrieve data rows device user's 'profile' contact. uri.withappendedpath(contactscontract.profile.content_uri, contactscontract.contacts.data.content_directory), profilequery.projection, // select email addresses. contactscontract.contacts.data.mimetype + " = ?", new string[]{contactscontract.commondatakinds.email .content_item_type}, // show primary email addresses first. note there won't // primary email address if user hasn't specified one. contactscontract.contacts.data.is_primary + " desc"); }
@override public void onloadfinished(loader<cursor> cursorloader, cursor cursor) { list<string> emails = new arraylist<>(); cursor.movetofirst(); while (!cursor.isafterlast()) { emails.add(cursor.getstring(profilequery.address)); cursor.movetonext(); } addemailstoautocomplete(emails); } @override public void onloaderreset(loader<cursor> cursorloader) { } private void addemailstoautocomplete(list<string> emailaddresscollection) { //create adapter tell autocompletetextview show in dropdown list. arrayadapter adapter = new arrayadapter<>(loginactivity.this, android.r.layout.simple_dropdown_item_1line, emailaddresscollection);
memailview.setadapter(adapter); } private interface profilequery { string[] projection = { contactscontract.commondatakinds.email.address, contactscontract.commondatakinds.email.is_primary, }; int address = 0; int is_primary = 1; } /** * represents asynchronous login/registration task used authenticate * user. */ public class userlogintask extends asynctask<void, void, boolean> { private final string memail; private final string mpassword; userlogintask(string email, string password) { memail = email; mpassword = password; } @override protected boolean doinbackground(void... params) { // todo: attempt authentication against network service. try { // simulate network access. thread.sleep(2000); } catch (interruptedexception e) { return false; } (string credential : dummy_credentials) { string[] pieces = credential.split(":"); if (pieces[0].equals(memail)) { // account exists, return true if password matches. return pieces[1].equals(mpassword); } } // todo: register new account here. return true; } @override protected void onpostexecute(final boolean success) { mauthtask = null; showprogress(false); if (success) { finish(); } else { mpasswordview.seterror(getstring(r.string.error_incorrect_password)); mpasswordview.requestfocus(); } } @override protected void oncancelled() { mauthtask = null; showprogress(false); } } }
here reason of problem:
protected void main(){ intent = new intent("android.intent.action.mainactivity"); startactivity(i); } protected void sign_up(view view){ if(view.getid()==r.id.button2){ intent = new intent("android.intent.action.sign_up"); startactivity(i); } } but right way is:
intent myintent = new intent(currentactivity.this, nextactivity.class); myintent.putextra("key", value); //optional parameters currentactivity.this.startactivity(myintent); the android developer web key more information it.
Comments
Post a Comment