示意图

思路

自定义一个布局容器(SplashView)，在这个布局容器中添加启动页图片，倒计时控件等逻辑操作，也就是把启动界面的一些相同的操作都封装到该容器中，最后将容器添加到启动界面 Activity 中。

具体实现

SimpleView 的完整代码

public class SplashView extends FrameLayout {

ImageView splashImg; // 欢迎界面图片控件

TextView skipBtn; // 欢迎界面倒计时／跳转控件

int skipBtnSizeInDip = 35; // 跳转控件的大小

int skipBtnMarginInDip = 15; // 跳转控件的距离屏幕边缘相对位置

int duration = 5; // 欢迎界面持续时间

int delayTime = 1000; // 计时器每隔 1 秒动作---更新倒计时数字

Activity activity; // 保存当前界面的 Activity ,并对当前 Activity 进行相关操作

GradientDrawable skipBtnBg = new GradientDrawable(); // 倒计时控件圆形背景图

SplashViewOnClickListener listener = null; // 页面动作接口

Handler handler = new Handler(); // 计时器管理者

Runnable runnable = new Runnable() {

@Override

public void run() {

// 每隔一秒更新倒计时控件文字，当倒计时结束，动作，移除欢迎界面内容，调用动作监听器的界面跳转方法

if (0 == duration) {

skipOutSplash();

return;

} else {

setDuration(--duration);

}

handler.postDelayed(runnable, delayTime);

}

};

String actUrl;

public void setActUrl(String actUrl) {

this.actUrl = actUrl;

}

public void setDuration(int duration) {

this.duration = duration;

skipBtn.setText(String.format("跳过\n%d s", duration));

}

public SplashView(@NonNull Activity context) {

super(context);

activity = context;

init();

}

public SplashView(@NonNull Activity context, @Nullable AttributeSet attrs) {

super(context, attrs);

activity = context;

init();

}

public SplashView(@NonNull Activity context, @Nullable AttributeSet attrs, @AttrRes int defStyleAttr) {

super(context, attrs, defStyleAttr);

activity = context;

init();

}

public void setListener(final SplashViewOnClickListener listener) {

if (null == listener)

return;

this.listener = listener;

splashImg.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View view) {

listener.splashImgClick(actUrl);

}

});

}

private void init() {

// 添加图片控件，设置图片铺满屏幕

splashImg = new ImageView(activity);

splashImg.setScaleType(ImageView.ScaleType.FIT_XY);

LayoutParams imgLayoutParams = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,

ViewGroup.LayoutParams.MATCH_PARENT);

addView(splashImg, imgLayoutParams);

splashImg.setClickable(true);

// 添加倒计时控件

skipBtn = new TextView(activity);

// 设置控件大小

int skipButtonSize = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,

skipBtnSizeInDip, activity.getResources().getDisplayMetrics());

LayoutParams skipLayoutParams = new LayoutParams(skipButtonSize,

skipButtonSize);

// 设置控件相对位置

skipLayoutParams.gravity = Gravity.TOP|Gravity.RIGHT;

int skipButtonMargin = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,

skipBtnMarginInDip, activity.getResources().getDisplayMetrics());

skipLayoutParams.setMargins(0, skipButtonMargin, skipButtonMargin, 0);

skipBtnBg.setShape(GradientDrawable.OVAL); // 设置计时器控件背景图片圆形

skipBtnBg.setColor(Color.parseColor("#66232323"));

skipBtn.setGravity(Gravity.CENTER);

skipBtn.setTextColor(activity.getResources().getColor(android.R.color.white));

skipBtn.setBackgroundDrawable(skipBtnBg);

skipBtn.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 10);

addView(skipBtn, skipLayoutParams);

skipBtn.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View view) {

skipOutSplash();

}

});

setDuration(duration);

handler.postDelayed(runnable, delayTime); // 触发器计时器

}

/**

* 显示欢迎界面控件

*

* @params

* */

public static void showSplashView(Activity activity, Integer duration, String imgUrl,String actUrl,

Integer defaultImgResouse, SplashViewOnClickListener listener) {

// 获取欢迎界面的容器对象

ViewGroup contentView = activity.getWindow().getDecorView().findViewById(android.R.id.content);

if (null == contentView || 0 == contentView.getChildCount()) {

throw new IllegalStateException("You should call showSplashView() after setContentView() in Activity instance");

}

// 创建 SplashView 对象，开始将图片和文字添加到 layoutparams 中，计时器开始计时

SplashView splashView = new SplashView(activity);

// 定义 SplashView 布局大小

RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams

(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);

// 设置接口回调

splashView.setListener(listener);

splashView.setActUrl(actUrl);

if (null != duration)

splashView.setDuration(duration);

Drawable drawable = null;

if (null != defaultImgResouse) {

drawable = activity.getResources().getDrawable(defaultImgResouse);

}

// 通过 Glide 加载欢迎图片

Glide.with(activity).load(imgUrl).error(drawable).placeholder(drawable).into(splashView.splashImg);

// 设置当前 activity 窗口的标记，充满屏幕

activity.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,

WindowManager.LayoutParams.FLAG_FULLSCREEN);

// 将 SplashView 添加到当前 Activity 布局界面

contentView.addView(splashView, params);

}

private void skipOutSplash() {

if (null != listener)

listener.splashSkipClick();

// 移除计时器

handler.removeCallbacks(runnable);

// 将 splashView 移除欢迎界面，设置动画

final ViewGroup parent = (ViewGroup) this.getParent();

if (parent != null) {

ObjectAnimator animator = ObjectAnimator.ofFloat(this,"alpha",1.0f, 0.0f)

.setDuration(600);

animator.start();

animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {

@Override

public void onAnimationUpdate(ValueAnimator valueAnimator) {

}

});

animator.addListener(new Animator.AnimatorListener() {

@Override

public void onAnimationStart(Animator animator) {

}

@Override

public void onAnimationEnd(Animator animator) {

parent.removeView(SplashView.this);

}

@Override

public void onAnimationCancel(Animator animator) {

parent.removeView(SplashView.this);

}

@Override

public void onAnimationRepeat(Animator animator) {

}

});

}

}

// 欢迎界面的动作监听器

public interface SplashViewOnClickListener {

void splashImgClick(String actionUrl); // 点击欢迎界面图片跳转到 actionUrl

void splashSkipClick(); // 点击跳转过欢迎界面进入主界面

}

}

在启动界面 Activity 中

public class SplashActivity extends AppCompatActivity {

String imgUrl = "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1505905221463&di=67cfa9f3a08a5359fa86a243fc6aebdb&imgtype=0&src=http%3A%2F%2Ff1.topitme.com%2F1%2Fed%2F14%2F1129731340b7414ed1o.jpg";

@Override

protected void onCreate(@Nullable Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_splash);

SplashView.showSplashView(SplashActivity.this, 6, imgUrl,"点我上哪儿？", R.drawable.splash_df, new SplashView.SplashViewOnClickListener() {

@Override

public void splashImgClick(String actionUrl) {

Toast.makeText(SplashActivity.this, actionUrl, Toast.LENGTH_SHORT).show();

}

@Override

public void splashSkipClick() {

startActivity(new Intent(SplashActivity.this, MainActivity.class));

finish();

}

});

}

@Override

public void onBackPressed() {

// super.onBackPressed();

}

}

总结

在功能的实现过程中，我们通过代码动态添加控件到布局容器，Handler 计时器管理者动态修改倒计时文字显示，使用 Glide 加载图片信息，通过创建接口监听界面的动作。重点还是在通过代码动态添加控件的过程。