Файл манифеста
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="demo.com.xapp">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".IntroActivity"></activity>
<activity android:name=".SplashActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".MainActivity"></activity>
</application>
</manifest>
Вводные слайдеры Упражнение
public class IntroActivity extends AppCompatActivity {
private ViewPager screenPager;
IntroViewPagerAdapter introViewPagerAdapter ;
TabLayout tabIndicator;
Button btnNext;
int position = 0 ;
Button btnGetStarted;
Animation btnAnim ;
TextView tvSkip;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// make the activity on full screen
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
// when this activity is about to be launch we need to check if its openened before or not
if (restorePrefData()) {
Intent mainActivity = new Intent(getApplicationContext(),SplashActivity.class );
startActivity(mainActivity);
finish();
}
setContentView(R.layout.activity_intro);
// hide the action bar
getSupportActionBar().hide();
// ini views
btnNext = findViewById(R.id.btn_next);
btnGetStarted = findViewById(R.id.btn_get_started);
tabIndicator = findViewById(R.id.tab_indicator);
btnAnim = AnimationUtils.loadAnimation(getApplicationContext(),R.anim.button_animation);
tvSkip = findViewById(R.id.tv_skip);
// fill list screen
final List<ScreenItem> mList = new ArrayList<>();
mList.add(new ScreenItem("Fresh Food","Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua, consectetur consectetur adipiscing elit",R.drawable.img1));
mList.add(new ScreenItem("Fast Delivery","Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua, consectetur consectetur adipiscing elit",R.drawable.img2));
mList.add(new ScreenItem("Easy Payment","Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua, consectetur consectetur adipiscing elit",R.drawable.img3));
// setup viewpager
screenPager =findViewById(R.id.screen_viewpager);
introViewPagerAdapter = new IntroViewPagerAdapter(this,mList);
screenPager.setAdapter(introViewPagerAdapter);
// setup tablayout with viewpager
tabIndicator.setupWithViewPager(screenPager);
// next button click Listner
btnNext.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
position = screenPager.getCurrentItem();
if (position < mList.size()) {
position++;
screenPager.setCurrentItem(position);
}
if (position == mList.size()-1) { // when we rech to the last screen
// TODO : show the GETSTARTED Button and hide the indicator and the next button
loaddLastScreen();
}
}
});
// tablayout add change listener
tabIndicator.addOnTabSelectedListener(new TabLayout.BaseOnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
if (tab.getPosition() == mList.size()-1) {
loaddLastScreen();
}
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
// Get Started button click listener
btnGetStarted.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//open main activity
Intent mainActivity = new Intent(getApplicationContext(),SplashActivity.class);
startActivity(mainActivity);
// also we need to save a boolean value to storage so next time when the user run the app
// we could know that he is already checked the intro screen activity
// i'm going to use shared preferences to that process
savePrefsData();
finish();
}
});
// skip button click listener
tvSkip.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
screenPager.setCurrentItem(mList.size());
}
});
}
private boolean restorePrefData() {
SharedPreferences pref = getApplicationContext().getSharedPreferences("myPrefs",MODE_PRIVATE);
Boolean isIntroActivityOpnendBefore = pref.getBoolean("isIntroOpnend",false);
return isIntroActivityOpnendBefore;
}
private void savePrefsData() {
SharedPreferences pref = getApplicationContext().getSharedPreferences("myPrefs",MODE_PRIVATE);
SharedPreferences.Editor editor = pref.edit();
editor.putBoolean("isIntroOpnend",true);
editor.commit();
}
// show the GETSTARTED Button and hide the indicator and the next button
private void loaddLastScreen() {
btnNext.setVisibility(View.INVISIBLE);
btnGetStarted.setVisibility(View.VISIBLE);
tvSkip.setVisibility(View.INVISIBLE);
tabIndicator.setVisibility(View.INVISIBLE);
// TODO : ADD an animation the getstarted button
// setup animation
btnGetStarted.setAnimation(btnAnim);
}
}
IntroViewPagerAdapter Activity-
public class IntroViewPagerAdapter extends PagerAdapter {
Context mContext;
List<ScreenItem> mListScreen;
public IntroViewPagerAdapter(Context mContext, List<ScreenItem> mListScreen) {
this.mContext = mContext;
this.mListScreen = mListScreen;
}
@NonNull
@Override
public Object instantiateItem(@NonNull ViewGroup container, int position) {
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View layoutScreen = inflater.inflate(R.layout.layout_screen,null);
ImageView imgSlide = layoutScreen.findViewById(R.id.intro_img);
TextView title = layoutScreen.findViewById(R.id.intro_title);
TextView description = layoutScreen.findViewById(R.id.intro_description);
title.setText(mListScreen.get(position).getTitle());
description.setText(mListScreen.get(position).getDescription());
imgSlide.setImageResource(mListScreen.get(position).getScreenImg());
container.addView(layoutScreen);
return layoutScreen;
}
@Override
public int getCount() {
return mListScreen.size();
}
@Override
public boolean isViewFromObject(@NonNull View view, @NonNull Object o) {
return view == o;
}
@Override
public void destroyItem(@NonNull ViewGroup container, int position, @NonNull Object object) {
container.removeView((View)object);
}
}
Экран Элемент Activity-
public class ScreenItem {
String Title, Description;
int ScreenImg;
public ScreenItem(String title, String description, int screenImg) {
Title = title;
Description = description;
ScreenImg = screenImg;
}
public void setTitle(String title) {
Title = title;
}
public void setDescription(String description) {
Description = description;
}
public void setScreenImg(int screenImg) {
ScreenImg = screenImg;
}
public String getTitle() {
return Title;
}
public String getDescription() {
return Description;
}
public int getScreenImg() {
return ScreenImg;
}
}
Активность на заставке-
public class SplashActivity extends AppCompatActivity {
public void onAttachedToWindow() {
super.onAttachedToWindow();
Window window = getWindow();
window.setFormat(PixelFormat.RGBA_8888);
}
/** Called when the activity is first created. */
Thread splashTread;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash);
StartAnimations();
}
private void StartAnimations() {
Animation anim = AnimationUtils.loadAnimation(this, R.anim.alpha);
anim.reset();
LinearLayout l=(LinearLayout) findViewById(R.id.lin_lay);
l.clearAnimation();
l.startAnimation(anim);
anim = AnimationUtils.loadAnimation(this, R.anim.translate);
anim.reset();
TextView iv = (TextView) findViewById(R.id.splash);
iv.clearAnimation();
iv.startAnimation(anim);
splashTread = new Thread() {
@Override
public void run() {
try {
int waited = 0;
// Splash screen pause time
while (waited < 6000) {
sleep(100);
waited += 100;
}
Intent intent = new Intent(SplashActivity.this,
MainActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
startActivity(intent);
SplashActivity.this.finish();
} catch (InterruptedException e) {
// do nothing
} finally {
SplashActivity.this.finish();
}
}
};
splashTread.start();
}
}
как мы можем показывать слайдеры вступления перед заставкой в первый раз, когда приложение установлено.Второй раз только заставка показывает не вводные слайдеры.Я новичок в Android, пожалуйста, помогите мне решить эту проблему.