Android控件——ViewFlipper的使用,垂直滚动广告条

1 前言

之前开发过一个TextView的滚动显示,但是局限性比较大,只能显示文字,不能显示图片等其他View。对比淘宝App的淘宝头条,发现显示的内容挺丰富的。网上搜索了下资料发现android自带的有控件ViewFlipper来实现。于是记录下来。

Android控件——ViewFlipper的使用,垂直滚动广告条_第1张图片

2 ViewFlipper简介

ViewFlipper是android系统提供的使View滚动的控件,ViewFlipper直译就是View快速滚动。打开源码发现它继承ViewAnimator,而ViewAnimator又继承FrameLayout。因此可以把ViewFlipper当FrameLayout使用。

ViewFlipper的用法如下:

1 常用 xml属性:

android:autoStart:设置是否自动加载下一个View
android:flipInterval:设置View之间切换的时间间隔,单位为ms
android:inAnimation:设置切换View的进入动画
android:outAnimation:设置切换View的退出动画

我的demo用法如下:

            <ViewFlipper
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_margin="20dp"
                android:id="@+id/view_flipper"
                android:autoStart="true"
                android:flipInterval="3000"
                android:inAnimation="@anim/in_animation"
                android:outAnimation="@anim/out_animation"
                android:background="#f0fef0">
            ViewFlipper>

如上,我们设置为自动加载下一个View,时间间隔为3s,进入和出去的动画为上次滚动TextView的两个动画,详细见我的博客android 自定义View开发实战(五) TextView滚动显示

2 常用方法:

boolean isFlipping(): 判断View切换是否正在进行
void setAutoStart(boolean autoStart):设置是否自动加载下一个View
void setFlipInterval(int milliseconds):设置View之间切换的时间间隔
void startFlipping():开始View的切换,而且会循环进行
void stopFlipping():停止View的切换
void setOutAnimation(Animation outAnimation):设置切换View的退出动画
void setInAnimation(Animation inAnimation):设置切换View的进入动画
void showNext(): 显示ViewFlipper里的下一个View
void showPrevious():显示ViewFlipper里的上一个View

可以看到,基本上对应了xml中的属性。当然,如果你对动画xml比较熟悉,自己可以实现更多好看的效果。

有了以上知识,我们就可以自定义属于自己的广告滚动条了。

3 自定义ViewFlipper的广告条

废话不多说,直接上干活:
xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.qiyei.javatest.MainActivity">
    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <ViewFlipper
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_margin="20dp"
                android:id="@+id/view_flipper"
                android:autoStart="true"
                android:flipInterval="3000"
                android:inAnimation="@anim/in_animation"
                android:outAnimation="@anim/out_animation"
                android:background="#f0fef0">
            ViewFlipper>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:background="@color/colorAccent"
                android:id="@+id/tv"
                android:text="Hello World!" />

            <Button
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/button"
                android:text="测试"/>

            <ImageView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/imv"/>

            <com.qiyei.javatest.VoiceControlBar
                android:layout_width="300dp"
                android:layout_height="300dp"
                android:layout_margin="30dp"
                app:bottomColor="@color/colorPrimary"
                app:topColor="@color/colorAccent"
                app:count="30"
                app:splitAngle="20"
                app:circleWidth="5dp"
                app:bg="@drawable/icon_alipay_main_icon"/>
            <Button
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/button2"
                android:text="测试动画"/>

        LinearLayout>
    ScrollView>

LinearLayout>

java代码:

public class MainActivity extends AppCompatActivity {

    private final static String TAG = "MainActivity";
    private TextView textView;
    private Button button;
    private Button button2;
    private ImageView imageView;
    private Context context;

    private ViewFlipper viewFlipper;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        context = this;
        initView();
        //put();
        //get();
        //removeTestEquals();
        testObserver();
        SortUtil.testInsertSort();
        SortUtil.testShellSort();
        rxjava();

    }

    private void initView() {
        textView = (TextView) findViewById(R.id.tv);
        button = (Button) findViewById(R.id.button);
        imageView = (ImageView) findViewById(R.id.imv);
        button2 = (Button) findViewById(R.id.button2);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                testAnimator();
            }
        });
        button2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this,TestActivity.class);
                startActivity(intent);
            }
        });
        viewFlipper = (ViewFlipper) findViewById(R.id.view_flipper);

        //viewFlipper.addView(view);
        for (int i = 0;i < 10; i ++){
            View view = LayoutInflater.from(this).inflate(R.layout.view_advertisement,null);
            TextView tv1 = (TextView) view.findViewById(R.id.tv1);
            tv1.setText("这个是支付宝打的广告哈:" + i);
            TextView tv2 = (TextView) view.findViewById(R.id.tv2);
            tv2.setText("这个是我打的广告哈:" + i);

            viewFlipper.addView(view);
        }

        viewFlipper.startFlipping();
        //viewFlipper.stopFlipping();
    }

    private void put(){
        SharedPreferences preferences = getSharedPreferences("test",MODE_PRIVATE);
        SharedPreferences.Editor editor = preferences.edit();
        for (int i = 0 ; i < 500 ; i++){
            editor.putInt("key" + i,2).apply();
        }
        //editor.commit();
    }

    private void get(){
        SharedPreferences preferences = getSharedPreferences("test",MODE_PRIVATE);
        for (int i = 0 ; i < 500 ; i++){
            String key = "key" + i;
            Log.d(TAG,"value " + i +":" +preferences.getInt(key,0));
        }
    }

    private void removeTestEquals(){
        List empList = new ArrayList();
        empList.add(new Employee(1,"jack"));
        Employee emp1 = new Employee(2,"tom");
        empList.add(emp1);

        //jack
        Employee emp11 = new Employee(1,"jack");
        //调用的是emp的equals方法
        empList.remove(emp11);

        Iterator it = empList.iterator();
        while(it.hasNext()){
            Employee emp = (Employee)it.next();
            System.out.println("name:"+emp.getName());
        }
    }

    private void testObserver(){
        MyObservable observable = new MyObservable();
        MyObserver observer1 = new MyObserver("aaaa");
        MyObserver observer2 = new MyObserver("bbbb");
        observable.addObserver(observer1);
        observable.addObserver(observer2);
        observable.postMessage("news");
    }

    private void testAnimator(){
//        ValueAnimator animator = ValueAnimator.ofFloat(0f,20f,10f,-30f);
//        animator.setDuration(6000);
//        animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
//            @Override
//            public void onAnimationUpdate(ValueAnimator animation) {
//                textView.setText(""+(float)animation.getAnimatedValue());
//            }
//        });
//        animator.setRepeatCount(3);
//        animator.start();
        float curTranslationX = textView.getTranslationX();

        //ObjectAnimator animator = ObjectAnimator.ofFloat(textView,"alpha",1f,0f,1f);
        ObjectAnimator animator = ObjectAnimator.ofFloat(textView,"translationX",curTranslationX,-500f,curTranslationX);
        animator.setDuration(2000);
        animator.start();

    }

    /**
     * 测试 Rxjava的例子
     */
    private void rxjava(){
        Observer observer = new Observer() {
            @Override
            public void onCompleted() {
                Logger.d("onCompleted");
            }

            @Override
            public void onError(Throwable e) {
                Logger.d("onError" + e);
            }

            @Override
            public void onNext(String s) {
                Logger.d(s);
            }
        };

        Subscriber subscriber = new Subscriber() {
            @Override
            public void onStart() {
                super.onStart();
            }

            @Override
            public void onCompleted() {
                Logger.d("onCompleted");
            }

            @Override
            public void onError(Throwable e) {
                Logger.d("onError" + e);
            }

            @Override
            public void onNext(String s) {
                Logger.d(s);
            }
        };

        Observable observable = Observable.create(new Observable.OnSubscribe(){
            @Override
            public void call(Subscribersuper String> subscriber) {
                subscriber.onStart();
                subscriber.onNext("hello");
                subscriber.onNext("world");
                subscriber.onNext("12345678");
                subscriber.onCompleted();
            }
        });

        observable.subscribe(observer);
        observable.subscribe(subscriber);

        Action0 action0 = new Action0(){
            @Override
            public void call() {
                Logger.d("send OnCompleted");
            }
        };

        Action1 onErrorAction = new Action1(){
            @Override
            public void call(Throwable throwable) {
                Logger.d("send throwable");
            }
        };

        Action1 stringAction1 = new Action1(){
            @Override
            public void call(String s) {
                Logger.d("send s");
            }
        };

        observable.subscribe(stringAction1);
        observable.subscribe(stringAction1,onErrorAction);
        observable.subscribe(stringAction1,onErrorAction,action0);

        //打印名字
        String[] names = new String[]{"123","hdhdh","bhsh","shsh","65789"};
        Observable.from(names)
                .subscribe(new Action1() {
                    @Override
                    public void call(String s) {
                        Log.d(TAG,"call:" + s);
                    }
                });

        final int resId = R.drawable.icon_alipay_main_icon;
        Observable.create(new Observable.OnSubscribe() {
            @Override
            public void call(Subscribersuper Drawable> subscriber) {
                Drawable drawable = getDrawable(resId);
                subscriber.onNext(drawable);
                subscriber.onCompleted();
            }
        }).subscribe(new Observer() {
            @Override
            public void onCompleted() {
                Log.d(TAG,"onCompleted");
            }

            @Override
            public void onError(Throwable e) {
                Log.d(TAG,"onError");
            }

            @Override
            public void onNext(Drawable drawable) {
                imageView.setImageDrawable(drawable);
            }
        });

        Observable.create(new Observable.OnSubscribe(){
            @Override
            public void call(Subscribersuper String> subscriber) {
                subscriber.onNext("中国人");
            }
        }).subscribeOn(Schedulers.io())     //io线程
          .observeOn(AndroidSchedulers.mainThread())    //主线程
          .subscribe(new Observer() {
            @Override
            public void onCompleted() {

            }

            @Override
            public void onError(Throwable e) {

            }

            @Override
            public void onNext(String s) {
                Log.d(TAG,"content:" + s);
            }
        });

        Integer[] array = new Integer[]{1,2,3,4,5,6,7,8,9};

        Observable.from(array)
                .map(new Func1() {
                    @Override
                    public String call(Integer i) {
                        return "hello:" + i;
                    }
                })
                .subscribe(new Observer() {
                    @Override
                    public void onCompleted() {

                    }

                    @Override
                    public void onError(Throwable e) {

                    }

                    @Override
                    public void onNext(String s) {
                        Log.d(TAG,s);
                    }
                });

    }

}

需要注意的是,这里我调用了viewFlipper的addView(View view)方法来添加子View,也可以调用void addView(View child, int index, ViewGroup.LayoutParams params)来添加子View。

子View布局:


<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:orientation="horizontal">

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/icon_alipay_main_icon"/>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/tv1"
            android:layout_gravity="center_vertical"
            android:text="这个是支付宝打的广告哈"/>

    LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:orientation="horizontal">

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/manager"/>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/tv2"
            android:layout_gravity="center_vertical"
            android:text="这个是我打的广告哈"/>

    LinearLayout>

LinearLayout>

最终运行效果如下:
Android控件——ViewFlipper的使用,垂直滚动广告条_第2张图片

Demo下载

你可能感兴趣的:(android,应用开发,android,UI开发)