我正在尝试在Viewpager中使用视频。 这是我正在使用的viewpager：
public class VerticalViewPager extends ViewPager {
public VerticalViewPager(Context context) {
super(context);
init();
}
public VerticalViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
private void init() {
// The majority of the magic happens here
setPageTransformer(true, new VerticalPageTransformer());
// The easiest way to get rid of the overscroll drawing that happens on the left and right
setOverScrollMode(OVER_SCROLL_NEVER);
}
private class VerticalPageTransformer implements ViewPager.PageTransformer {
@Override
public void transformPage(View view, float position) {
if (position < -1) { // [-Infinity,-1)
// This page is way off-screen to the left.
view.setAlpha(0);
} else if (position <= 1) { // [-1,1]
view.setAlpha(1);
// Counteract the default slide transition
view.setTranslationX(view.getWidth() * -position);
//set Y position to swipe in from top
float yPosition = position * view.getHeight();
view.setTranslationY(yPosition);
} else { // (1,+Infinity]
// This page is way off-screen to the right.
view.setAlpha(0);
}
}
}
/**
* Swaps the X and Y coordinates of your touch event.
*/
private MotionEvent swapXY(MotionEvent ev) {
float width = getWidth();
float height = getHeight();
float newX = (ev.getY() / height) * width;
float newY = (ev.getX() / width) * height;
ev.setLocation(newX, newY);
return ev;
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev){
boolean intercepted = super.onInterceptTouchEvent(swapXY(ev));
swapXY(ev); // return touch coordinates to original reference frame for any child views
return intercepted;
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
return super.onTouchEvent(swapXY(ev));
}
}
这是我正在使用videoview的viewpager页面之一：
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_gravity="center_horizontal"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="@font/lato_bold"
android:textSize="24sp"
android:textColor="@color/passive_orange"
android:id="@+id/passive_steps_tv"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginTop="16dp"
android:text="@string/passive_steps"
/>
<VideoView
android:layout_width="0dp"
android:layout_height="0dp"
android:id="@+id/video_player"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@id/passive_steps_tv"
app:layout_constraintDimensionRatio="1.77"
android:layout_marginTop="24dp"
android:src="@drawable/passive_education_screen_1_image_1"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@id/step_collected_tv"
android:textSize="16dp"
android:textColor="@color/greyish_brown_two"
android:text="@string/passive_edu_2_title"
android:fontFamily="@font/lato_bold"
android:layout_marginTop="36dp"
android:id="@+id/title"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="45dp"
android:text="3159"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@id/video_player"
android:id="@+id/step_count_tv"
android:fontFamily="@font/lato_bold"
android:textColor="@color/greyish_brown_two"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="18dp"
android:text="@string/steps_collected"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@id/step_count_tv"
android:id="@+id/step_collected_tv"
android:fontFamily="@font/lato_regular"
android:textColor="@color/greyish_brown_two"
/>
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="@id/left_guideline"
app:layout_constraintRight_toRightOf="@id/right_guideline"
app:layout_constraintTop_toBottomOf="@id/title"
android:textSize="12dp"
android:textColor="@color/greyish_brown_two"
android:text="@string/passive_edu_2_text"
android:fontFamily="@font/lato_regular"
android:layout_marginTop="6dp"
android:gravity="center"
/>
<android.support.constraint.Guideline
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.11"
android:id="@+id/left_guideline"
/>
<android.support.constraint.Guideline
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.89"
android:id="@+id/right_guideline"
/>
</android.support.constraint.ConstraintLayout>
这是课程：
public class PassiveEducationScreenItemFragment extends Fragment {
private int position;
ImageView image2;
VideoView videoPlayer;
TextView stepCountTv;
boolean counterStarted = false;
public static PassiveEducationScreenItemFragment newInstance(int position) {
PassiveEducationScreenItemFragment fragment = new PassiveEducationScreenItemFragment();
Bundle args = new Bundle();
args.putInt("position", position);
fragment.setArguments(args);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
position = getArguments().getInt("position", 0);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view;
switch (position)
{
case 0 :
view = inflater.inflate(R.layout.fragment_passive_education_screen_item_1,
container, false);
break;
case 1 :
view = inflater.inflate(R.layout.fragment_passive_education_screen_item_2,
container, false);
break;
case 2 :
view = inflater.inflate(R.layout.fragment_passive_education_screen_item_3,
container, false);
break;
default:
view = inflater.inflate(R.layout.fragment_passive_education_screen_item_1,
container, false);
}
ButterKnife.bind(this, view);
return view;
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
initView(view);
}
private void initView(View view) {
if(position!=1) {
image2 = view.findViewById(R.id.image_2);
image2.setAnimation(AnimationUtils.loadAnimation(getContext(), R.anim.pulse));
}else {
videoPlayer = view.findViewById(R.id.video_player);
stepCountTv = view.findViewById(R.id.step_count_tv);
setVideoToVideoPlayer();
startStepCounter();
}
}
private void startStepCounter() {
if(!counterStarted) {
handler.sendEmptyMessageDelayed(0, 600);
counterStarted = true;
}
}
Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
counterStarted = true;
int stepCount = Integer.parseInt(stepCountTv.getText().toString());
stepCount +=1;
stepCountTv.setText(stepCount+"");
handler.sendEmptyMessageDelayed(0,600);
}
};
@Override
public void onResume() {
super.onResume();
if(position==1)
setVideoToVideoPlayer();
}
private void setVideoToVideoPlayer() {
videoPlayer.setBackgroundColor(Color.TRANSPARENT);
videoPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mp) {
mp.setLooping(true);
}
});
videoPlayer.setVideoPath("android.resource://xxx.xxx.xxx/" + R.raw.xxx);
videoPlayer.requestFocus();
videoPlayer.start();
}
}
现在，我面临的问题是，当我滚动页面时，视频变为空白，而当页面加载时，视频开始加载。
通过使用以下代码链接可解决此问题：videoPlayer.setZOrderOnTop(true);
但是然后发生的是，现在视频位于系统底部导航按钮的上方。
所以现在我该如何解决这个问题。
我希望视频在滚动时不成为空白，并且视频不与底部导航按钮重叠。
答案 0 :(得分：0)
您应该对xml和java文件进行一些更改。
您的xml文件应为
<FrameLayout
android:id="@+id/frameLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center" >
<VideoView
android:id="@+id/videoView"
android:layout_gravity="center"
android:layout_marginTop="16dp"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<FrameLayout
android:id="@+id/placeholder"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</FrameLayout>
</FrameLayout>
现在更改您的setOnPreparedListener方法
videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
@Override
public void onPrepared(final MediaPlayer mp) {
new Handler().post(new Runnable() {
@Override
public void run() {
if (mp.getCurrentPosition() != 0) {
View placeholder = findViewById(R.id.placeholder);
placeholder.setVisibility(View.GONE);
} else {
new Handler().postDelayed(this, 50);
}
}
});
}
});