Android实现VR图片、视频小程序
Android实现VR图片、视频小程序
项目源自黑马程序员编著的《Android企业级项目实战教程》一书第2章
程序分为三个部分:主界面、VR图片部分、VR视频部分
项目准备
创建项目后,首先将主界面所需要的图片vr_bg.png、vr_pic.png、vr_video.png,导入drawable-hdpi文件夹
修改清单文件
设置标签中largeHeap属性为true,为程序提供更大的内存空间,避免出现内存溢出
设置标签中theme属性为@style/Theme.AppCompat.Light.NoActionBar,以删除标题栏使程序更美观
主界面制作
编写主界面布局文件,放置两个ImageView控件用于显示”VR图片“以及”VR视频“按钮。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/vr_bg"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="@+id/iv_pic"
android:layout_width="200dp"
android:layout_height="200dp"
android:src="@drawable/vr_pic" />
<ImageView
android:id="@+id/iv_video"
android:layout_width="200dp"
android:layout_height="200dp"
android:src="@drawable/vr_video" />
</LinearLayout>
主界面逻辑代码
package com.example.vr;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private ImageView iv_pic, iv_video;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}
private void init() {
iv_pic = (ImageView) findViewById(R.id.iv_pic);
iv_video = (ImageView) findViewById(R.id.iv_video);
iv_pic.setOnClickListener(this);
iv_video.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.iv_pic:
//跳转到VR全景图片界面
Intent pic = new Intent(MainActivity.this, VRPicActivity.class);
startActivity(pic);
break;
case R.id.iv_video:
//跳转到VR全景视频界面
Intent video = new Intent(MainActivity.this,VRVideoActivity.class);
startActivity(video);
break;
}
}
}
VR图片界面制作
创建一个Empty Activity类,命名为VRPicActivity,布局文件命名为activity_vrpic
项目结构切换为Project选项,在app/src/main文件夹下创建assets文件夹,将全景图片andes.jpg导入该文件夹
添加项目所需的库common、commonwidget、panowidget、videowidget
在AndroidStudio中选择File->New->Import Module,把第三方库common库导入项目。
选中项目,右键选择Open Module Settings选项,然后选择Dependencies选项卡,单击右上角的绿色加号并选择Module Dependency选项,把common库加入项目,其余三个库操作同上。
在activity_vrpic中放置VrPanoramaView控件
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.vr.sdk.widgets.pano.VrPanoramaView
android:id="@+id/vr_image"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</FrameLayout>
逻辑代码
package com.example.vr;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import com.google.vr.sdk.widgets.pano.VrPanoramaEventListener;
import com.google.vr.sdk.widgets.pano.VrPanoramaView;
import java.io.InputStream;
public class VRPicActivity extends AppCompatActivity {
private VrPanoramaView vrImage;
private AsyncTask<Void, Void, Bitmap> task;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_vrpic);
init();
}
private void init() {
vrImage = (VrPanoramaView) findViewById(R.id.vr_image);
vrImage.setEventListener(new VrPanoramaEventListener());//处理图片加载出错的情况
//2.异步加载全景图片
task = new AsyncTask<Void, Void, Bitmap>() {
@Override
protected Bitmap doInBackground(Void... params) {
try {
// 从assets目录中加载图片
InputStream is = getAssets().open("andes.jpg");
Bitmap bitmap = BitmapFactory.decodeStream(is);
is.close();
return bitmap;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Bitmap bitmap) {
super.onPostExecute(bitmap);
if (bitmap != null) {
//加载配置
VrPanoramaView.Options options = new VrPanoramaView.Options();
//设置图片为立体效果
options.inputType = VrPanoramaView.Options.TYPE_STEREO_OVER_UNDER;
//加载图片
vrImage.loadImageFromBitmap(bitmap, options);
}
}
}.execute();
}
@Override
protected void onResume() {
super.onResume();
vrImage.resumeRendering();//恢复渲染
}
@Override
protected void onPause() {
super.onPause();
vrImage.pauseRendering();//暂停渲染
}
@Override
protected void onDestroy() {
super.onDestroy();
vrImage.shutdown(); //关闭渲染释放内存
if (task != null) {
task.cancel(true); //停止异步任务
task = null;
}
}
}
VR视频界面制作
创建一个Empty Activity类,命名为VRVideoActivity,布局文件命名为activity_vrvideo
将全景视频congo.mp4导入assets文件夹
(视频因格式限制无法上传,这里仅做演示)
在布局文件activity_vrvideo中放置一个VrVideoView控件,用于显示全景视频,一个SeekBar控件用于显示视频播放的进度条,一个TextView控件用于显示视频播放进度的百分比。
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.vr.sdk.widgets.video.VrVideoView
android:id="@+id/vr_video"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#FFF000"
android:orientation="horizontal">
<SeekBar
android:id="@+id/seekbar"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_weight="1" />
<TextView
android:id="@+id/seekbar_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:padding="20dp"
android:text="--:--"
android:textSize="19sp" />
</LinearLayout>
</FrameLayout>
逻辑代码
package com.example.vr;
import android.os.AsyncTask;
import android.os.Bundle;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import com.google.vr.sdk.widgets.video.VrVideoEventListener;
import com.google.vr.sdk.widgets.video.VrVideoView;
public class VRVideoActivity extends AppCompatActivity {
private VrVideoView videoView;
private AsyncTask<Void, Void, Void> task;
private TextView seekbarText;
private SeekBar seekbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_vrvideo);
init();
}
private void init() {
seekbar = (SeekBar) findViewById(R.id.seekbar);
seekbarText = (TextView) findViewById(R.id.seekbar_text);
seekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser)
{
if (fromUser) {
long duration = videoView.getDuration();
long newPosition = (long) (progress * 0.01f * duration);
videoView.seekTo(newPosition);
}
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
videoView = (VrVideoView) findViewById(R.id.vr_video);
videoView.setTag(true);
videoView.setEventListener(new VrVideoEventListener() {
@Override
public void onClick() {
super.onClick();
boolean isPlay = (boolean) videoView.getTag();
if (isPlay) {
isPlay = false;
videoView.pauseVideo();//暂停播放
} else {
isPlay = true;
videoView.playVideo();//继续播放
}
videoView.setTag(isPlay);
}
//视图画面切换到下一帧时被调用.
@Override
public void onNewFrame() {
super.onNewFrame();
seekbar.setMax(100);
long duration = videoView.getDuration();//获取视频时长,单位毫秒
long currentPosition = videoView.getCurrentPosition();//获取当前位置
int percent = (int) (currentPosition * 100f / duration + 0.5f);
seekbar.setProgress(percent);
seekbarText.setText(percent + "%");
}
@Override
public void onLoadSuccess() {
super.onLoadSuccess();
Toast.makeText(VRVideoActivity.this, "开始播放", Toast.LENGTH_SHORT)
.show();
seekbar.setMax(100);
seekbar.setProgress(0);
seekbarText.setText("0%");
}
@Override
public void onLoadError(String errorMessage) {
super.onLoadError(errorMessage);
Toast.makeText(VRVideoActivity.this, "播放出错", Toast.LENGTH_SHORT)
.show();
}
@Override
public void onCompletion() {
super.onCompletion();
seekbar.setMax(100);
seekbar.setProgress(100);
seekbarText.setText("100%");
}
});
//创建异步任务
task = new AsyncTask<Void, Void, Void>() {
@Override
protected Void doInBackground(Void... params) {
String fileName = "congo.mp4";
VrVideoView.Options option = new VrVideoView.Options();
option.inputFormat = VrVideoView.Options.FORMAT_DEFAULT;//非流媒体
option.inputType = VrVideoView.Options.TYPE_STEREO_OVER_UNDER;//3D效果
try {
//从资产目录加载视频
videoView.loadVideoFromAsset(fileName, option);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
Toast.makeText(VRVideoActivity.this, "加载成功开始播放",
Toast.LENGTH_SHORT).show();
}
}.execute();
}
//细节一.切换模式造成屏幕变黑
@Override
protected void onResume() {
super.onResume();
videoView.resumeRendering();//重新渲染
}
@Override
protected void onPause() {
super.onPause();
videoView.pauseRendering();//停止渲染
}
//细节二.AsyncTask处理
@Override
protected void onDestroy() {
super.onDestroy();
videoView.shutdown();//停止
if (task != null) {
task.cancel(true);
task = null;
}
}
}
此时调试运行程序会闪退,判断为依赖问题
解决方法:
1.降低build.gradle(:app)中minSDKVersion版本
defaultConfig {
minSdkVersion 19
}
2.更改build.gradle(:app)中依赖
dependencies {
implementation project(path: ':common')
implementation project(path: ':commonwidget')
implementation project(path: ':panowidget')
implementation project(path: ':videowidget')
}
改为使用
dependencies {
compile 'com.google.vr:sdk-audio:1.10.0'
compile 'com.google.vr:sdk-base:1.10.0'
compile 'com.google.vr:sdk-common:1.10.0'
compile 'com.google.vr:sdk-commonwidget:1.10.0'
compile 'com.google.vr:sdk-panowidget:1.10.0'
compile 'com.google.vr:sdk-videowidget:1.10.0'
}
3.更改build.gradle(‘项目名称’)中buildscript下dependencies的classpath
classpath 'com.android.tools.build:gradle:3.5.1'
并在buildscript下的repositories和allprojects下的repositories两处添加
maven {
url "http://maven.aliyun.com/nexus/content/groups/public/"
}
此时虚拟机成功运行程序。
总结:在实际学习中可能遇到开发工具、库等版本不兼容的问题,需要多尝试各种方法。
本文地址:https://blog.csdn.net/qq_23604153/article/details/108739303
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