Android启动动画实现

男娘i 2022-05-22 09:59 229阅读 0赞

#### 首先提一下实现机制： ####

![70][]

##### 1.将manifest中launcher页设为我们需要显示的启动页面。   2.在启动动画页面中我们先加载我们需要的启动页面（动画、文字、广告等）。   3.在启动页的activity中利用线程的postDelayed方法来延迟3s，3s后便执行跳转到主界面或者   登录界面（也可以通过检查SharedPreferences中是否记住了用户历史账号信息，有记住就直接   执行登录操作，没有就跳转到登录页面）。 #####

PS：解决启动页面白屏： [传送][Link 1]

### 实现步骤： ###

#### 一、新建启动页StartActivity ####

package cn.com.box.black.bbnotepad.Activity;
    
    import android.app.Activity;
    import android.content.Context;
    import android.content.Intent;
    import android.content.SharedPreferences;
    import android.os.Build;
    import android.os.Bundle;
    import android.os.Handler;
    import android.support.annotation.RequiresApi;
    import android.support.v4.content.ContextCompat;
    import android.support.v4.view.ViewCompat;
    import android.support.v7.app.AppCompatActivity;
    import android.view.KeyEvent;
    import android.view.View;
    import android.view.ViewGroup;
    import android.view.Window;
    import android.view.WindowManager;
    import android.widget.CheckBox;
    import android.widget.FrameLayout;
    import android.widget.Toast;
    
    import com.airbnb.lottie.LottieAnimationView;
    
    import cn.com.box.black.bbnotepad.Bean.SuccessBean;
    import cn.com.box.black.bbnotepad.Listener.TListener;
    import cn.com.box.black.bbnotepad.Model.LoginModel;
    import cn.com.box.black.bbnotepad.R;
    
    import static cn.com.box.black.bbnotepad.Server.AUTO_LOGIN;
    import static cn.com.box.black.bbnotepad.Server.user_id_remember;
    import static com.githang.statusbar.StatusBarTools.getStatusBarHeight;
    
    /**
     * Created by gcj on 2017/11/28
     */
    public class StartActivity extends AppCompatActivity {
        private Handler handler = new Handler();
        private LottieAnimationView mAnimationView;
        private String username,userpass;
        private CheckBox checkBox;
        private String userid;
        private boolean check;
        TListener<SuccessBean> tListener = new TListener<SuccessBean>() {
            @Override
            public void onResponse(SuccessBean loginBean) {
                userid = loginBean.getSuccess().toString();
                //记录用户id
    //            showToast(userid);
                user_id_remember= Integer.parseInt(userid);
                if(loginBean.getSuccess().toString().equals("0")){
                    Toast.makeText(StartActivity.this,"登陆失败",Toast.LENGTH_SHORT).show();
                    Intent intent = new Intent(StartActivity.this, LoginActivity.class);
                    startActivity(intent);
                    finish();
                }
                else{
    //                Toast.makeText(LoginActivity.this,"登陆成功",Toast.LENGTH_SHORT).show();
                    Intent intent = new Intent();
                    intent.setClass(StartActivity.this, MainActivity1.class);
                    startActivity(intent);
                    finish();
                }
            }
            @Override
            public void onFail(String msg) {
                Toast.makeText(StartActivity.this,"登陆失败",Toast.LENGTH_SHORT).show();
                Intent intent = new Intent(StartActivity.this, LoginActivity.class);
                startActivity(intent);
                finish();
            }
        };
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
    //        getSupportActionBar().hide();
            if (Build.VERSION.SDK_INT <= 19) {
                setStatusBarColor4_4(this, ContextCompat.getColor(this, R.color.back_red) );
            } else {
                setStatusBarColor(this,ContextCompat.getColor(this, R.color.back_red) );
            }
            // 注意：此处将setContentView()方法注释掉
             setContentView(R.layout.activity_start);
            check=getUser_remember();
            handler.postDelayed(new Runnable() {
                @Override
                public void run() {
                    gotoLogin();
                }
            }, 3000);
        }
    
        /**
         * 前往注册、登录主页
         */
        private void gotoLogin() {
            username = getUser_name();
            userpass = getUser_password();
            if(AUTO_LOGIN==0) {
                LoginModel loginModul = new LoginModel();
                loginModul.getUserList(username, userpass, tListener);
            }else{
                Intent intent = new Intent(StartActivity.this, LoginActivity.class);
                startActivity(intent);
                finish();
            }
    
            //取消界面跳转时的动画，使启动页的logo图片与注册、登录主页的logo图片完美衔接
            overridePendingTransition(0, 0);
        }
    
        /**
         * 屏蔽物理返回键
         */
        @Override
        public boolean onKeyDown(int keyCode, KeyEvent event) {
            if (keyCode == KeyEvent.KEYCODE_BACK) {
                return true;
            }
            return super.onKeyDown(keyCode, event);
        }
    
        @Override
        protected void onDestroy() {
            if (handler != null) {
                //If token is null, all callbacks and messages will be removed.
                handler.removeCallbacksAndMessages(null);
            }
            super.onDestroy();
        }
        @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
        static void setStatusBarColor(Activity activity, int statusColor) {
            Window window = activity.getWindow();
            //取消状态栏透明
            window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
            //添加Flag把状态栏设为可绘制模式
            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
            //设置状态栏颜色
            window.setStatusBarColor(statusColor);
            //设置系统状态栏处于可见状态
            window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);
            //让view不根据系统窗口来调整自己的布局
            ViewGroup mContentView = (ViewGroup) window.findViewById(Window.ID_ANDROID_CONTENT);
            View mChildView = mContentView.getChildAt(0);
            if (mChildView != null) {
                ViewCompat.setFitsSystemWindows(mChildView, false);
                ViewCompat.requestApplyInsets(mChildView);
            }
        }
        static void setStatusBarColor4_4(Activity activity, int statusColor) {
            Window window = activity.getWindow();
            ViewGroup mContentView = (ViewGroup) activity.findViewById(Window.ID_ANDROID_CONTENT);
    
    //First translucent status bar.
            window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
            int statusBarHeight = getStatusBarHeight(activity);
    
            View mChildView = mContentView.getChildAt(0);
            if (mChildView != null) {
                FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) mChildView.getLayoutParams();
                //如果已经为 ChildView 设置过了 marginTop, 再次调用时直接跳过
                if (lp != null && lp.topMargin < statusBarHeight && lp.height != statusBarHeight) {
                    //不预留系统空间
                    ViewCompat.setFitsSystemWindows(mChildView, false);
                    lp.topMargin += statusBarHeight;
                    mChildView.setLayoutParams(lp);
                }
            }
    
            View statusBarView = mContentView.getChildAt(0);
            if (statusBarView != null && statusBarView.getLayoutParams() != null && statusBarView.getLayoutParams().height == statusBarHeight) {
                //避免重复调用时多次添加 View
                statusBarView.setBackgroundColor(statusColor);
                return;
            }
            statusBarView = new View(activity);
            ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, statusBarHeight);
            statusBarView.setBackgroundColor(statusColor);
    //向 ContentView 中添加假 View
            mContentView.addView(statusBarView, 0, lp);
        }
    
        public String getUser_id(){
            SharedPreferences sp;
            sp = getSharedPreferences("userInfo", Context.MODE_PRIVATE);
            return sp.getString("id","");
        }
        //获取保存的用户名
        public String getUser_name(){
            SharedPreferences sp;
            sp = getSharedPreferences("userInfo", Context.MODE_PRIVATE);
            return sp.getString("username","");
        }
        //获取保存的密码
        public String getUser_password(){
            SharedPreferences sp;
            sp = getSharedPreferences("userInfo", Context.MODE_PRIVATE);
            return sp.getString("userpass","");
        }
        public boolean getUser_remember(){
            SharedPreferences sp;
            sp = getSharedPreferences("userInfo", Context.MODE_PRIVATE);
            return sp.getBoolean("remember",false);
        }
        public void showToast(String content){
            Toast.makeText(this,content,Toast.LENGTH_SHORT).show();
        }
    }

#### 二、启动界面布局 ####

<?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"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/colorLogin"
        android:orientation="vertical">
    
        <ImageView
            android:id="@+id/imageView2"
            android:layout_width="120dp"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:scaleType="fitCenter"
            app:srcCompat="@drawable/ic_launcher" />
    
        <TextView
            android:id="@+id/textView8"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textColor="#ffffff"
            android:textSize="18sp"
            android:gravity="center"
            android:padding="20dp"
            android:text="启动" />
        
    </LinearLayout>

#### 三、修改启动页面（manifest） ####

#### 四、启动页面主题（styles.xml） ####

##### 五、推荐一个动画效果开源库 #####

##### GitHub：[Lottie][] #####

##### 参考使用：[Lottie使用][Lottie 1] #####

[70]: /images/20220522/c2a581cf81314087bfd21a38cc7d4ca7.png
[Link 1]: https://www.jianshu.com/p/014b07e3da9e
[Lottie]: https://github.com/airbnb/lottie-android
[Lottie 1]: https://blog.csdn.net/msn465780/article/details/69228403