碰一碰矩阵发视频的技术开发，支持OEM - ToB企服应用市场:ToB评测及商务社交产业平台

public class NFCActivity extends AppCompatActivity implements NfcAdapter.ReaderCallback {
private NfcAdapter nfcAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_nfc);
nfcAdapter = NfcAdapter.getDefaultAdapter(this);
if (nfcAdapter == null) {
// 设备不支持 NFC
finish();
} else {
// 开启前台调度系统，以便在应用处于前台时优先处理 NFC 事件
enableForegroundDispatch();
}
}
@Override
protected void onResume() {
super.onResume();
if (nfcAdapter!= null) {
nfcAdapter.enableReaderMode(this, this, NfcAdapter.FLAG_READER_NFC_A | NfcAdapter.FLAG_READER_NFC_F, null);
}
}
@Override
protected void onPause() {
super.onPause();
if (nfcAdapter!= null) {
nfcAdapter.disableReaderMode(this);
}
}
private void enableForegroundDispatch() {
Intent intent = new Intent(this, getClass()).addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);
IntentFilter[] filters = new IntentFilter[]{};
String[][] techLists = new String[][]{new String[]{android.nfc.tech.NfcA.class.getName()},
new String[]{android.nfc.tech.NfcF.class.getName()}};
nfcAdapter.enableForegroundDispatch(this, pendingIntent, filters, techLists);
}
@Override
public void onTagDiscovered(Tag tag) {
// 在此处处理发现的 NFC 标签，读取标签中的数据（例如设备标识或视频分发指令）
// 假设标签中存储了一个简单的设备唯一 ID
byte[] id = tag.getId();
String deviceId = bytesToHex(id);
// 发起与目标设备的配对请求或获取视频分发信息，这里只是示例，实际需要与后端服务交互
requestVideoDistributionInfo(deviceId);
}
private String bytesToHex(byte[] bytes) {
StringBuilder sb = new StringBuilder();
for (byte b : bytes) {
sb.append(String.format("%02X", b));
}
return sb.toString();
}
private void requestVideoDistributionInfo(String deviceId) {
// 这里可以使用网络请求（如 Retrofit 等库）向服务器发送请求，获取与该设备相关的视频分发信息
// 示例代码省略网络请求的具体实现
}
}

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public class VideoDownloader {
public static void downloadVideo(String videoUrl, File outputFile) {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url(videoUrl)
.build();
try (Response response = client.newCall(request).execute()) {
if (!response.isSuccessful()) {
throw new IOException("服务器响应失败: " + response);
}
InputStream inputStream = response.body().byteStream();
FileOutputStream outputStream = new FileOutputStream(outputFile);
byte[] buffer = new byte[1024];
int len;
while ((len = inputStream.read(buffer))!= -1) {
outputStream.write(buffer, 0, len);
}
outputStream.close();
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}

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public class VideoPlayerActivity extends AppCompatActivity {
private VideoView videoView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_video_player);
videoView = findViewById(R.id.videoView);
// 假设视频文件已经下载到本地的 /sdcard/video.mp4 路径
String videoPath = Environment.getExternalStorageDirectory().getPath() + "/video.mp4";
videoView.setVideoPath(videoPath);
videoView.start();
}
}

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