android app启动动画的实现
16lz
2021-01-23
android app启动动画的实现：先出现app logo再出现注册登录界面
先看看效果图
下面介绍具体实现步骤
1 MainActivity代码实现：主要是动画的切换
public class MainActivity extends AppCompatActivity { ImageView logoView; View loginFragment; View registerFragment; Button registerButton; Button backButton; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); findView(); startAnimator(); } private void findView() { logoView = findViewById(R.id.logo_imageView); loginFragment = findViewById(R.id.loginFragment); registerFragment = findViewById(R.id.registerFragment); registerButton = findViewById(R.id.registerButton); registerButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { loginToRegisterAnimator(); } }); backButton = findViewById(R.id.back_button); backButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { registerToLoginAnimator(); } }); } private void startAnimator() { ObjectAnimator animator1 = ObjectAnimator.ofFloat(logoView, "alpha", 1f, 0f); ObjectAnimator animator2 = ObjectAnimator.ofFloat(loginFragment, "alpha", 0f, 1f); AnimatorSet animSet =new AnimatorSet(); animSet.play(animator2).after(animator1); animSet.setDuration(1500); animSet.start(); } private void loginToRegisterAnimator() { registerFragment.setVisibility(View.VISIBLE); loginFragment.setVisibility(View.GONE); ObjectAnimator animator3 = ObjectAnimator.ofFloat(loginFragment, "alpha", 1f, 0f); ObjectAnimator animator4 = ObjectAnimator.ofFloat(registerFragment, "alpha", 0f, 1f); AnimatorSet animSet =new AnimatorSet(); animSet.play(animator4).after(animator3); animSet.setDuration(10); animSet.start(); } private void registerToLoginAnimator() { registerFragment.setVisibility(View.GONE); loginFragment.setVisibility(View.VISIBLE); ObjectAnimator animator3 = ObjectAnimator.ofFloat(loginFragment, "alpha", 0f, 1f); ObjectAnimator animator4 = ObjectAnimator.ofFloat(registerFragment, "alpha", 1f, 0f); AnimatorSet animSet =new AnimatorSet(); animSet.play(animator3).after(animator4); animSet.setDuration(10); animSet.start(); }}2 activity_main.xml
<?xml version="1.0" encoding="utf-8"?><android.support.constraint.ConstraintLayout 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" tools:context=".MainActivity" android:layout_height="match_parent"> <View android:layout_width="match_parent" android:layout_height="match_parent" android:background="@color/black" android:alpha="1" android:id="@+id/ScrollListModal" tools:layout_editor_absoluteY="0dp" tools:layout_editor_absoluteX="0dp"/> <ImageView android:layout_width="0dp" android:layout_height="0dp" app:srcCompat="@drawable/ianime_nobg" android:id="@+id/logo_imageView" app:layout_constraintTop_toTopOf="@+id/ScrollListModal" app:layout_constraintRight_toRightOf="@id/ScrollListModal" app:layout_constraintLeft_toLeftOf="@id/ScrollListModal" app:layout_constraintBottom_toBottomOf="@id/ScrollListModal"/> <fragment android:id="@+id/loginFragment" android:name="com.example.startanimation.LoginFragment" android:layout_width="match_parent" android:layout_height="match_parent" tools:layout="@layout/fragment_login" /> <fragment android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/registerFragment" android:name="com.example.startanimation.RegisterFragment" tools:layout="@layout/fragment_register"/>android.support.constraint.ConstraintLayout>3 LoginFragment类
public class LoginFragment extends Fragment { private View view; public LoginFragment() { // Required empty public constructor } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment view= inflater.inflate(R.layout.fragment_login, container, false); return view; } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); }}4 fragment_login.xml
<?xml version="1.0" encoding="utf-8"?><android.support.constraint.ConstraintLayout 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:alpha="0" tools:context="LoginFragment" android:id="@+id/login_fragment"> <TextView android:text="登陆" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="48dp" android:textColor="@color/WhiteText" android:id="@+id/textView" app:layout_constraintTop_toTopOf="parent" android:layout_marginTop="48dp" app:layout_constraintStart_toStartOf="parent" android:layout_marginStart="45dp"/> <TextView android:text="世界と色と共に" android:textSize="16dp" android:textColor="@color/WhiteText" android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/textView10" android:layout_marginTop="4dp" app:layout_constraintTop_toBottomOf="@+id/textView" app:layout_constraintStart_toStartOf="parent" android:layout_marginStart="47dp"/> <EditText android:hint="输入用户名" android:background="@drawable/edit_background" android:layout_width="0dp" android:layout_height="40dp" android:textColorHint="@color/WhiteText" android:textSize="16dp" android:paddingLeft="12dp" android:singleLine="true" android:id="@+id/account" android:layout_marginTop="80dp" app:layout_constraintTop_toBottomOf="@+id/textView10" app:layout_constraintStart_toStartOf="parent" android:layout_marginStart="44dp" app:layout_constraintEnd_toEndOf="parent" android:layout_marginEnd="44dp"/> <EditText android:background="@drawable/edit_background" android:hint="输入密码" android:textColorHint="@color/WhiteText" android:layout_width="0dp" android:paddingLeft="12dp" android:layout_height="40dp" android:textSize="16dp" android:singleLine="true" android:id="@+id/password" android:layout_marginTop="24dp" app:layout_constraintTop_toBottomOf="@+id/account" app:layout_constraintStart_toStartOf="parent" android:layout_marginStart="44dp" app:layout_constraintEnd_toEndOf="parent" android:layout_marginEnd="44dp"/> <ImageView android:src="@drawable/arrow_right_white" android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/loginArrowRight" android:layout_marginTop="16dp" app:layout_constraintTop_toBottomOf="@+id/password" app:layout_constraintStart_toStartOf="parent" android:layout_marginStart="16dp" app:layout_constraintEnd_toEndOf="parent" android:layout_marginEnd="16dp"/> <Button android:background="@drawable/button_shape" android:text="新用户注册" android:textColor="@drawable/login_button_font_color" android:textSize="24dp" android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/registerButton" android:layout_marginTop="8dp" app:layout_constraintTop_toBottomOf="@+id/loginArrowRight" app:layout_constraintStart_toStartOf="parent" android:layout_marginStart="16dp" app:layout_constraintEnd_toEndOf="parent" android:layout_marginEnd="16dp"/> <Button android:text="访客使用" android:background="@drawable/button_shape" android:textSize="24dp" android:textColor="@drawable/login_button_font_color" android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/button2" android:layout_marginTop="16dp" app:layout_constraintTop_toBottomOf="@+id/registerButton" app:layout_constraintStart_toStartOf="parent" android:layout_marginStart="16dp" app:layout_constraintEnd_toEndOf="parent" android:layout_marginEnd="16dp" />android.support.constraint.ConstraintLayout>5 RegisterFragment类
public class RegisterFragment extends Fragment { public RegisterFragment() { // Required empty public constructor } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment return inflater.inflate(R.layout.fragment_register, container, false); }}6 fragment_register.xml
<?xml version="1.0" encoding="utf-8"?><android.support.constraint.ConstraintLayout 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:alpha="0" android:visibility="gone" tools:context=".RegisterFragment" android:id="@+id/register_fragment"> <TextView android:text="注册" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="48dp" android:textColor="@color/WhiteText" android:id="@+id/textView2" app:layout_constraintTop_toTopOf="parent" android:layout_marginTop="48dp" app:layout_constraintStart_toStartOf="parent" android:layout_marginStart="45dp"/> <TextView android:text="君と僕は一緒に" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="16dp" android:textColor="@color/WhiteText" android:id="@+id/textView3" android:layout_marginTop="4dp" app:layout_constraintTop_toBottomOf="@+id/textView2" app:layout_constraintStart_toStartOf="parent" android:layout_marginStart="47dp"/> <EditText android:background="@drawable/edit_background" android:hint="手机号/邮箱" android:textColorHint="@color/WhiteText" android:singleLine="true" android:textSize="16dp" android:paddingLeft="12dp" android:layout_width="0dp" android:layout_height="40dp" android:id="@+id/reg_account" android:layout_marginTop="100dp" app:layout_constraintTop_toBottomOf="@+id/textView3" app:layout_constraintEnd_toEndOf="parent" android:layout_marginEnd="44dp" app:layout_constraintStart_toStartOf="parent" android:layout_marginStart="44dp"/> <EditText android:background="@drawable/edit_background" android:hint="输入密码" android:textColorHint="@color/WhiteText" android:singleLine="true" android:textSize="16dp" android:paddingLeft="12dp" android:layout_width="0dp" android:layout_height="40dp" android:id="@+id/reg_password" android:layout_marginTop="32dp" app:layout_constraintTop_toBottomOf="@+id/reg_account" app:layout_constraintEnd_toEndOf="parent" android:layout_marginEnd="44dp" app:layout_constraintStart_toStartOf="parent" android:layout_marginStart="44dp"/> <EditText android:background="@drawable/edit_background" android:hint="重复输入密码" android:textColorHint="@color/WhiteText" android:singleLine="true" android:textSize="16dp" android:paddingLeft="12dp" android:layout_width="0dp" android:layout_height="40dp" android:id="@+id/reg_passwordAgain" android:layout_marginTop="32dp" app:layout_constraintTop_toBottomOf="@+id/reg_password" app:layout_constraintEnd_toEndOf="parent" android:layout_marginEnd="44dp" app:layout_constraintStart_toStartOf="parent" android:layout_marginStart="44dp"/> <Button android:background="@drawable/button_shape" android:textSize="24dp" android:text="返回" android:textColor="@color/WhiteText" android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/back_button" android:layout_marginTop="48dp" app:layout_constraintTop_toBottomOf="@+id/reg_passwordAgain" app:layout_constraintStart_toStartOf="parent" app:layout_constraintHorizontal_bias="0.5" app:layout_constraintEnd_toStartOf="@+id/start_register"/> <Button android:background="@drawable/button_shape" android:textSize="24dp" android:text="注册" android:textColor="@color/WhiteText" android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/start_register" app:layout_constraintTop_toTopOf="@+id/back_button" app:layout_constraintStart_toEndOf="@+id/back_button" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintHorizontal_bias="0.5"/>android.support.constraint.ConstraintLayout>这是三个主要的界面类，下面7、8、9是在drawable文件夹下定义的布局定义文件
7 button_shape.xml
<?xml version="1.0" encoding="utf-8" ?> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle"><corners android:radius="3dp"/><padding android:left="10dp" android:right="10dp"/><stroke android:width="0dp" android:color="#ffffff"/>shape>8 edit_background.xml
<?xml version="1.0" encoding="utf-8"?><layer-list xmlns:android="http://schemas.android.com/apk/res/android"> <item> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle"> <corners android:radius="3dp"/> <stroke android:width="2dp" android:color="#ffffff"/> shape> item>layer-list>9 login_button_font_color.xml
<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_pressed="true" android:color="@color/GrayText"/> <item android:state_focused="true" android:color="@color/GrayText"/> <item android:color="@color/WhiteText"/>selector>10 values文件下的colors.xml多定义了三种颜色
<?xml version="1.0" encoding="utf-8"?><resources> <color name="colorPrimary">#008577color> <color name="colorPrimaryDark">#00574Bcolor> <color name="colorAccent">#D81B60color> <color name="WhiteText">#ffffffcolor> <color name="GrayText">#A2A2A2color> <color name="black">#000000color>resources>更多相关文章
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