MSDK -- Android-ImportAndActivateSDKInAndroidStudio代码跟读

一、概述

这边文章主要讲一下Android导入和激活SDK的示例代码跟读，初步了解一下SDK的注册运行过程。

代码链接：

https://www.github.com/DJI-Mobile-SDK-Tutorials/Android-ImportAndActivateSDKInAndroidStudio

二、代码

MApplication.java 代码主要是通过Helper.install(MApplication.this);代码语句将MSDK装载进入App中，便于后续调用。

package com.dji.importSDKDemo;

import android.app.Application;
import android.content.Context;

import com.secneo.sdk.Helper;

public class MApplication extends Application {

@Override
protected void attachBaseContext(Context paramContext) {
super.attachBaseContext(paramContext);
Helper.install(MApplication.this);
}

}

MainActivity.java 主要代码，执行了布局加载，权限检查/获取，SDK的注册，连接飞机等基本操作

布局加载：

通过setContentView(R.layout.activity_main);语句加载了基本activity布局，同时调用checkAndRequestPermissions();进行权限检查

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

// When the compile and target version is higher than 22, please request the following permission at runtime to ensure the SDK works well.
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
checkAndRequestPermissions();
}

setContentView(R.layout.activity_main);

//Initialize DJI SDK Manager
mHandler = new Handler(Looper.getMainLooper());

}

权限检查：

检查所需要的权限，检查通过则会进入注册App过程

/**
* 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) {
showToast("Need to grant the permissions!");
ActivityCompat.requestPermissions(this,
missingPermission.toArray(new String[missingPermission.size()]),
REQUEST_PERMISSION_CODE);
}

}

检查的权限情况：

 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,
};

检查权限结果处理：

检查通过，进入注册流程startSDKRegistration();不通过则通过Toast通知客户showToast("Missing permissions!!!");

/**
* 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 {
showToast("Missing permissions!!!");
}
}

注册App过程：

通过registerApp方法去将App进行注册，如果注册成功没有错误则会开始尝试连接飞机startConnectionToProduct(); 注册失败则通过showToast("Register sdk fails, please check the bundle id and network connection!");提示客户做对应检查。

private void startSDKRegistration() {
if (isRegistrationInProgress.compareAndSet(false, true)) {
AsyncTask.execute(new Runnable() {
@Override
public void run() {
showToast("registering, pls wait...");

DJISDKManager.getInstance().registerApp(MainActivity.this.getApplicationContext(), new DJISDKManager.SDKManagerCallback() {
@Override
public void onRegister(DJIError djiError) {
if (djiError == DJISDKError.REGISTRATION_SUCCESS) {
showToast("Register Success");
DJISDKManager.getInstance().startConnectionToProduct();
} else {
showToast("Register sdk fails, please check the bundle id and network connection!");
}
Log.v(TAG, djiError.getDescription());
}

@Override
public void onProductDisconnect() {
Log.d(TAG, "onProductDisconnect");
showToast("Product Disconnected");
notifyStatusChange();

}
@Override
public void onProductConnect(BaseProduct baseProduct) {
Log.d(TAG, String.format("onProductConnect newProduct:%s", baseProduct));
showToast("Product Connected");
notifyStatusChange();

}

@Override
public void onProductChanged(BaseProduct baseProduct) {

}

@Override
public void onComponentChange(BaseProduct.ComponentKey componentKey, BaseComponent oldComponent,
BaseComponent newComponent) {

if (newComponent != null) {
newComponent.setComponentListener(new BaseComponent.ComponentListener() {

@Override
public void onConnectivityChange(boolean isConnected) {
Log.d(TAG, "onComponentConnectivityChanged: " + isConnected);
notifyStatusChange();
}
});
}
Log.d(TAG,
String.format("onComponentChange key:%s, oldComponent:%s, newComponent:%s",
componentKey,
oldComponent,
newComponent));

}

@Override
public void onInitProcess(DJISDKInitEvent djisdkInitEvent, int i) {

}

@Override
public void onDatabaseDownloadProgress(long l, long l1) {

}

});
}
});
}
}