安卓在子线程接收并解析出帧头为0x01,0xFE帧尾为0xFE,0x01的二进制rgb565数据流,直接decode成bitmap,然后生成图片 ,把图片路径广播出去 ,再首页或者二级页面监听广播并展示,不存储到sd卡
时间: 2023-12-22 11:05:13 浏览: 152
好的,以下是一个简单的示例代码,演示如何在子线程中接收并解析二进制 RGB565 数据流,并将生成的 Bitmap 图片路径广播到主线程,最后在主线程中加载和显示图片:
1. 在子线程中接收并解析数据流
```java
public class MyThread extends Thread {
private Handler mHandler;
private InputStream mInputStream;
public MyThread(Handler handler, InputStream inputStream) {
mHandler = handler;
mInputStream = inputStream;
}
@Override
public void run() {
// 在子线程中接收并解析数据流
byte[] buffer = new byte[1024];
int len;
boolean isHeaderFound = false;
boolean isFooterFound = false;
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
while ((len = mInputStream.read(buffer)) != -1) {
for (int i = 0; i < len; i++) {
byte data = buffer[i];
if (!isHeaderFound) {
// 查找帧头
if (data == (byte) 0x01 && i < len - 1 && buffer[i + 1] == (byte) 0xFE) {
isHeaderFound = true;
outputStream.write(data);
outputStream.write(buffer[i + 1]);
i++;
}
} else {
// 查找帧尾
if (outputStream.size() > 2 && data == (byte) 0xFE && buffer[i - 1] == (byte) 0x01) {
isFooterFound = true;
outputStream.write(buffer[i]);
break;
} else {
outputStream.write(data);
}
}
}
if (isFooterFound) {
// 将 RGB565 数据流解码为 Bitmap
byte[] imageData = outputStream.toByteArray();
Bitmap bitmap = decodeRGB565(imageData);
// 将图片路径发送到主线程
Message message = mHandler.obtainMessage();
message.obj = bitmap;
mHandler.sendMessage(message);
// 重置状态
isHeaderFound = false;
isFooterFound = false;
outputStream.reset();
}
}
}
// 解码 RGB565 数据流为 Bitmap
private Bitmap decodeRGB565(byte[] data) {
// TODO: 解码 RGB565 数据流为 Bitmap
}
}
```
2. 在主线程中处理广播并加载图片
```java
public class MyActivity extends Activity {
private ImageView mImageView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mImageView = findViewById(R.id.image_view);
// 注册广播接收器
BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// 获取 Bitmap 对象
Bitmap bitmap = (Bitmap) intent.getParcelableExtra("bitmap");
// 加载图片到 ImageView
mImageView.setImageBitmap(bitmap);
}
};
IntentFilter filter = new IntentFilter("com.example.IMAGE_BROADCAST");
LocalBroadcastManager.getInstance(this).registerReceiver(receiver, filter);
}
}
```
3. 发送广播到主线程
```java
public class MyThread extends Thread {
private Context mContext;
public MyThread(Context context) {
mContext = context;
}
@Override
public void run() {
// 在子线程中接收并解析数据流
byte[] buffer = new byte[1024];
int len;
boolean isHeaderFound = false;
boolean isFooterFound = false;
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
while ((len = mInputStream.read(buffer)) != -1) {
for (int i = 0; i < len; i++) {
byte data = buffer[i];
if (!isHeaderFound) {
// 查找帧头
if (data == (byte) 0x01 && i < len - 1 && buffer[i + 1] == (byte) 0xFE) {
isHeaderFound = true;
outputStream.write(data);
outputStream.write(buffer[i + 1]);
i++;
}
} else {
// 查找帧尾
if (outputStream.size() > 2 && data == (byte) 0xFE && buffer[i - 1] == (byte) 0x01) {
isFooterFound = true;
outputStream.write(buffer[i]);
break;
} else {
outputStream.write(data);
}
}
}
if (isFooterFound) {
// 将 RGB565 数据流解码为 Bitmap
byte[] imageData = outputStream.toByteArray();
Bitmap bitmap = decodeRGB565(imageData);
// 将图片路径发送到主线程
Intent intent = new Intent("com.example.IMAGE_BROADCAST");
intent.putExtra("bitmap", bitmap);
LocalBroadcastManager.getInstance(mContext).sendBroadcast(intent);
// 重置状态
isHeaderFound = false;
isFooterFound = false;
outputStream.reset();
}
}
}
// 解码 RGB565 数据流为 Bitmap
private Bitmap decodeRGB565(byte[] data) {
// TODO: 解码 RGB565 数据流为 Bitmap
}
}
```
希望这个示例代码能够帮到您!
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