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大疆无人机安卓Mobile Sdk开发（二）连接无人机，获取无人机信息
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大疆无人机安卓Mobile Sdk开发（一）简单介绍 大疆无人机安卓Mobile Sdk开发（二）连接无人机，获取无人机信息 大疆无人机安卓Mobile Sdk开发（三）制定航点任务WaypointMission 大疆无人机安卓Mobile Sdk开发（四）读取飞机的图片和视频并下载 大疆无人机安卓Mobile Sdk开发（五）解决M300Rtk H20相机无法获取图片视频的问题 qq505057618 我主要说核心部分，首先建议大家先下载一个官方的mobile sdk的Demo跑看一看，研究研究后再去尝试自己开发。 开发的话你需要注册一个大疆开发者账号，然后注册一个基于mobilesdk的应用，官方会分配给你一个App Key 然后在你AndroidMnifest需要填入这个key，这个key是和你的包名绑定的，另外需要声明
还要注意你的主activity的的写法，对USB_ACCESSORY_ATTACHED不了解的可以去google一下，主要是保证安卓与外设之间的通讯的，在这里，是保证你的无人机遥控器和安卓设置能连接上的。 然后是gradle文件，需要添加对大疆的依赖 dependencies { implementation 'com.android.support:multidex:1.0.2' implementation 'com.squareup:otto:1.3.8' implementation ('com.dji:dji-sdk:4.10', { // Uncomment the following line if your app does not need Anti Distortion for // Mavic 2 Pro and Mavic 2 Zoom. It will greatly reducing the size of the APK: exclude module: 'library-anti-distortion' // Uncomment the following line if your APP does not need network RTK exclude module: 'library-networkrtk-helper' }) compileOnly 'com.dji:dji-sdk-provided:4.10' }下面分析主activity代码的分析,只贴出核心代码。首先你要申请指定的权限，然后在权限允许后调用registerApp方法去注册应用，在收到注册成功的回调后，调用DJISDKManager.getInstance().startConnectionToProduct()去连接无人机，连接成功后会走到onProductConnect回调函数，这时候你可以获取你想要的无人机信息了。 public class MainActivity extends AppCompatActivity { private static final String TAG = MainActivity.class.getSimpleName(); private static final String[] REQUIRED_PERMISSION_LIST = new String[] { Manifest.permission.VIBRATE, Manifest.permission.INTERNET, Manifest.permission.ACCESS_WIFI_STATE, Manifest.permission.WAKE_LOCK, Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_NETWORK_STATE, Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.CHANGE_WIFI_STATE, Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.BLUETOOTH, Manifest.permission.BLUETOOTH_ADMIN, Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.READ_PHONE_STATE, Manifest.permission.RECORD_AUDIO }; private static final int REQUEST_PERMISSION_CODE = 12345; private FrameLayout contentFrameLayout; private Stack stack; private TextView titleTextView; private List missingPermission = new ArrayList(); private AtomicBoolean isRegistrationInProgress = new AtomicBoolean(false); private BaseComponent.ComponentListener mDJIComponentListener = new BaseComponent.ComponentListener() { @Override public void onConnectivityChange(boolean isConnected) { Log.d(TAG, "onComponentConnectivityChanged: " + isConnected); notifyStatusChange(); } }; //region Life-cycle @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); checkAndRequestPermissions(); DJISampleApplication.getEventBus().register(this); setContentView(R.layout.activity_main); } /** * Result of runtime permission request */ @Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); // Check for granted permission and remove from missing list if (requestCode == REQUEST_PERMISSION_CODE) { for (int i = grantResults.length - 1; i >= 0; i--) { if (grantResults[i] == PackageManager.PERMISSION_GRANTED) { missingPermission.remove(permissions[i]); } } } // If there is enough permission, we will start the registration if (missingPermission.isEmpty()) { startSDKRegistration(); } else { Toast.makeText(getApplicationContext(), "Missing permissions!!!", Toast.LENGTH_LONG).show(); } } @Override protected void onDestroy() { DJISampleApplication.getEventBus().unregister(this); super.onDestroy(); } @Override protected void onNewIntent(@NonNull Intent intent) { String action = intent.getAction(); if (UsbManager.ACTION_USB_ACCESSORY_ATTACHED.equals(action)) { Intent attachedIntent = new Intent(); attachedIntent.setAction(DJISDKManager.USB_ACCESSORY_ATTACHED); sendBroadcast(attachedIntent); } } //region Registration n' Permissions Helpers /** * Checks if there is any missing permissions, and * requests runtime permission if needed. */ private void checkAndRequestPermissions() { // Check for permissions for (String eachPermission : REQUIRED_PERMISSION_LIST) { if (ContextCompat.checkSelfPermission(this, eachPermission) != PackageManager.PERMISSION_GRANTED) { missingPermission.add(eachPermission); } } // Request for missing permissions if (missingPermission.isEmpty()) { startSDKRegistration(); } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { ActivityCompat.requestPermissions(this, missingPermission.toArray(new String[missingPermission.size()]), REQUEST_PERMISSION_CODE); } } private void startSDKRegistration() { if (isRegistrationInProgress.compareAndSet(false, true)) { AsyncTask.execute(new Runnable() { @Override public void run() { ToastUtils.setResultToToast(MainActivity.this.getString(R.string.sdk_registration_doing_message)); DJISDKManager.getInstance().registerApp(MainActivity.this.getApplicationContext(), new DJISDKManager.SDKManagerCallback() { @Override public void onRegister(DJIError djiError) { if (djiError == DJISDKError.REGISTRATION_SUCCESS) { DJILog.e("App registration", DJISDKError.REGISTRATION_SUCCESS.getDescription()); DJISDKManager.getInstance().startConnectionToProduct(); ToastUtils.setResultToToast(MainActivity.this.getString(R.string.sdk_registration_success_message)); } else { ToastUtils.setResultToToast(MainActivity.this.getString(R.string.sdk_registration_message) + djiError.getDescription()); } Log.v(TAG, djiError.getDescription()); } @Override public void onProductDisconnect() { Log.d(TAG, "onProductDisconnect"); notifyStatusChange(); } @Override public void onProductConnect(BaseProduct baseProduct) { Log.d(TAG, String.format("onProductConnect newProduct:%s", baseProduct)); notifyStatusChange(); } @Override public void onComponentChange(BaseProduct.ComponentKey componentKey, BaseComponent oldComponent, BaseComponent newComponent) { if (newComponent != null) { newComponent.setComponentListener(mDJIComponentListener); } Log.d(TAG, String.format("onComponentChange key:%s, oldComponent:%s, newComponent:%s", componentKey, oldComponent, newComponent)); notifyStatusChange(); } @Override public void onInitProcess(DJISDKInitEvent djisdkInitEvent, int i) { } }); } }); } } private void notifyStatusChange() { DJISampleApplication.getEventBus().post(new ConnectivityChangeEvent()); } //endregion private void refreshTitle() { if (stack.size() > 1) { ViewWrapper wrapper = stack.peek(); titleTextView.setText(wrapper.getTitleId()); } else if (stack.size() == 1) { BaseProduct product = DJISampleApplication.getProductInstance(); if (product != null && product.getModel() != null) { titleTextView.setText("" + product.getModel().getDisplayName()); } else { titleTextView.setText(R.string.sample_app_name); } } } @Subscribe public void onConnectivityChange(ConnectivityChangeEvent event) { runOnUiThread(new Runnable() { @Override public void run() { refreshTitle(); } }); } }
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