效果

实现分析

基本上没有什么难点，就是布局，然后显示用户协议对话框，动态处理权限，判断是否显示引导界面，是否显示广告界面等。

布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".component.splash.activity.SplashActivity">

    <!--banner-->
    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="120dp"
        android:src="@drawable/splash_banner" />

    <!--logo-->
    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/copyright"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="20dp"
        android:src="@drawable/splash_logo" />

    <!--版权-->
    <TextView
        android:id="@+id/copyright"
        android:textColor="@color/black80"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="30dp"
        android:text="@string/copyright" />
</RelativeLayout>

是否显示用户协议对话框

if (DefaultPreferenceUtil.getInstance(getHostActivity()).isAcceptTermsServiceAgreement()) {
    //已经同意了用户协议

    checkPermission();
} else {
    showTermsServiceAgreementDialog();
}

动态处理权限

现在做Android必须要动态处理权限，这里使用第三方框架，推荐再用到的时候才动态请求权限，写法和现在一样。

private void checkPermission() {
    //让动态框架检查是否授权了

    //如果不使用框架就使用系统提供的API检查
    //它内部也是使用系统API检查
    //只是使用框架就更简单了
    SplashActivityPermissionsDispatcher.onPermissionGrantedWithPermissionCheck(this);
}

/**
 * 权限授权了就会调用该方法
 * 请求相机权限目的是扫描二维码，拍照
 */
@NeedsPermission({
        Manifest.permission.CAMERA,
        Manifest.permission.READ_EXTERNAL_STORAGE,
        Manifest.permission.WRITE_EXTERNAL_STORAGE,
        Manifest.permission.ACCESS_COARSE_LOCATION,
        Manifest.permission.ACCESS_FINE_LOCATION
})
void onPermissionGranted() {
    //如果有权限就进入下一步
    prepareNext();
}

/**
 * 显示权限授权对话框
 * 目的是提示用户
 */
@OnShowRationale({
        Manifest.permission.CAMERA,
        Manifest.permission.READ_EXTERNAL_STORAGE,
        Manifest.permission.WRITE_EXTERNAL_STORAGE,
        Manifest.permission.ACCESS_COARSE_LOCATION,
        Manifest.permission.ACCESS_FINE_LOCATION
})
void showRequestPermission(PermissionRequest request) {
    new AlertDialog.Builder(getHostActivity())
            .setMessage(R.string.permission_hint)
            .setPositiveButton(R.string.allow, (dialog, which) -> request.proceed())
            .setNegativeButton(R.string.deny, (dialog, which) -> request.cancel()).show();
}

/**
 * 拒绝了权限调用
 */
@OnPermissionDenied({
        Manifest.permission.CAMERA,
        Manifest.permission.READ_EXTERNAL_STORAGE,
        Manifest.permission.WRITE_EXTERNAL_STORAGE,
        Manifest.permission.ACCESS_COARSE_LOCATION,
        Manifest.permission.ACCESS_FINE_LOCATION
})
void showDenied() {
    //退出应用
    finish();
}

/**
 * 再次获取权限的提示
 */
@OnNeverAskAgain({
        Manifest.permission.CAMERA,
        Manifest.permission.READ_EXTERNAL_STORAGE,
        Manifest.permission.WRITE_EXTERNAL_STORAGE,
        Manifest.permission.ACCESS_COARSE_LOCATION,
        Manifest.permission.ACCESS_FINE_LOCATION
})
void showNeverAsk() {
    //继续请求权限
    checkPermission();
}


/**
 * 授权后回调
 *
 * @param requestCode
 * @param permissions
 * @param grantResults
 */
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    //将授权结果传递到框架
    SplashActivityPermissionsDispatcher.onRequestPermissionsResult(this, requestCode, grantResults);
}

界面跳转

private void postNext() {
    binding.copyright.postDelayed(new Runnable() {
        @Override
        public void run() {
            next();
        }
    }, Config.SPLASH_DEFAULT_DELAY_TIME);

}

private void next() {
    //获取意图的目的是，因为启动该界面的时候，可能携带一些数据
    //需要在主界面处理
    Intent intent = new Intent();

    Intent oldIntent = getIntent();
    IntentUtil.cloneIntent(oldIntent, intent);

//        if (sp.isLogin()) {
//            intent.setClass(getHostActivity(), AdActivity.class);
//        } else {
    intent.setClass(getHostActivity(), MainActivity.class);
//        }

    startActivity(intent);

    //关闭当前界面
    finish();

    //禁用启动动画
    overridePendingTransition(0, 0);
}