我正在尝试开发一个用户必须注册的应用程序。
我只在用户第一次安装&启动应用程序
我希望一旦用户注册，演练/教程应该停止显示，但无论用户是否注册，它们都应该在第一次显示后停止显示。
如何编写代码，以便在用户注册后才停止显示演练/教程。
下面是我的walkthrough .java文件的代码:
public class Walkthroughs extends AppCompatActivity {
/**
* The {@link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {@link FragmentPagerAdapter} derivative, which will keep every
* loaded fragment in memory. If this becomes too memory intensive, it
* may be best to switch to a
* {@link android.support.v4.app.FragmentStatePagerAdapter}.
*/
SectionsPagerAdapter mSectionsPagerAdapter;
Button buttonSignUp;
View view;
/**
* The {@link ViewPager} that will host the section contents.
*/
ViewPager mViewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_walkthroughs);
SharedPreferences pref = getSharedPreferences("ActivityPREF", Context.MODE_PRIVATE);
if(pref.getBoolean("activity_executed", false)){
Intent intent = new Intent(this, Main.class);
startActivity(intent);
finish();
} else {
SharedPreferences.Editor ed = pref.edit();
ed.putBoolean("activity_executed", true);
ed.apply();
}
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
CirclePageIndicator circleIndicator = (CirclePageIndicator)findViewById(R.id.titles);
circleIndicator.setViewPager(mViewPager);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_walkthrough_screen_no1, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
switch (position){
case 0:
return new Walkthroughs_screen_no1();
case 1:
return new Walkthrough_screen_no2();
case 2:
return new Walkthrough_screen_no3();
case 3:
return new Walkthrough_screen_no4();
case 4:
return new Walkthrough_screen_no5();
default:
return new Walkthrough_screen_no5();
}
}
@Override
public int getCount() {
// Show 5 total pages.
return 5;
}
@Override
public CharSequence getPageTitle(int position) {
Locale l = Locale.getDefault();
switch (position) {
case 0:
return getString(R.string.title_section1).toUpperCase(l);
case 1:
return getString(R.string.title_section2).toUpperCase(l);
}
return null;
}
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number";
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_walkthrough_screen_no1, container, false);
return rootView;
}
}
}
public class Walkthrough_screen_no5 extends Fragment {
View view;
Button buttonSignUp;
EditText et;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_walkthrough_screen_no5, container, false);
et = (EditText) rootView.findViewById(R.id.signUp_phoneNumber);
buttonSignUp = (Button) rootView.findViewById(R.id.buttonSignUp);
buttonSignUp.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String editText = et.getText().toString();
if(editText.isEmpty()) {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle("Oops!");
builder.setMessage("You forgot to enter your phone number.");
builder.setPositiveButton(android.R.string.ok, null);
AlertDialog dialog = builder.create();
dialog.show();
} else {
Intent intent = new Intent(getActivity(), Main.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
}
}
});
return rootView;
}
}
这是我的AndroidManifest.xml文件的代码:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.abc.xxx" >
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme"
android:uiOptions="splitActionBarWhenNarrow" >
<activity
android:name=".Main"
android:label="@string/app_name" >
</activity>
<activity
android:name=".MyCredits"
android:label="@string/title_activity_my_credits"
android:parentActivityName=".Main" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.abc.xxx.Main" />
</activity>
<activity
android:name=".AddMoreFriends"
android:label="@string/title_activity_add_friends"
android:parentActivityName=".Main" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.abc.xxx.Main" />
</activity>
<activity
android:name=".Settings"
android:label="@string/title_activity_settings"
android:parentActivityName=".Main" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.abc.xxx.Main" />
</activity>
<activity
android:name=".Help"
android:label="@string/title_activity_help"
android:parentActivityName=".Settings" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.abc.xxx.Settings" />
</activity>
<activity
android:name=".Walkthroughs"
android:label="@string/app_name"
android:theme="@style/WalkthroughThemes"
android:screenOrientation="portrait">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
我是新来的StackOverflow，所以请配合。
Ok在这段代码中
SharedPreferences pref = getSharedPreferences("ActivityPREF", Context.MODE_PRIVATE);
if(pref.getBoolean("activity_executed", false)){
Intent intent = new Intent(this, Main.class);
startActivity(intent);
finish();
} else {
SharedPreferences.Editor ed = pref.edit();
ed.putBoolean("activity_executed", true);
ed.apply();
}
你正在检查是否activity_executed布尔值，并根据它的值，你正在决定是否启动你的主要活动，但从下次开始，它将始终是真的，你需要设置共享偏好"has_signedup"，这应该设置在你的Walkthrough_screen_no5片段类似的方式，你正在做的，并检查你的活动值