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我开始学习使用android客户端向AWS发送实时数据。我使用kinesis发送数据。但是，我没有找到示例代码。我尝试根据我对AWS教程的理解编写代码以开始（http://docs.aws.amazon.com/mobile/sdkforandroid/developerguide/getting-started-kinesis.html）。但是，仍然存在两个问题：1. context.getCachedDir（）有错误。我不知道如何设置上下文（智能手机上的目录或AWS上的目录？）2.保护Void doInBackground（Void ... v）未命中返回语句。android将数据发送到AWS
是否有任何建议，找出问题？THX
public class MainActivity extends AppCompatActivity {
CognitoCachingCredentialsProvider credentialsProvider = new CognitoCachingCredentialsProvider(
getApplicationContext(), // Context
"us-east-1:75d540bf-08c8-42fc-87a1-xxxx", // Identity Pool ID
Regions.US_EAST_1 // Region
);
// working directory for the recorder
File directory = context.getCachedDir();
// AWS Firehose region
Regions region = Regions.US_WEST_2;
// initialize a credentials provider
AWSCredentialsProvider provider = new CognitoCachingCredentialsProvider(
context,
"us-east-1:75d540bf-08c8-42fc-87a1-xxxxx",
Regions.US_EAST_1);
KinesisFirehoseRecorder firehoseRecorder = new KinesisFirehoseRecorder(
directory, region, provider);
// save some strings
String streamName = "my_stream"; // Firehose delivery stream name
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
firehoseRecorder.saveRecord("Hello world!\n", streamName);
firehoseRecorder.saveRecord("Streaming data to S3 via Firehose is easy.\n", streamName);
// send previously save data to Amazon Firehose
// Note: submitAllRecords() makes network calls, so wrap it in an AsyncTask.
new AsyncTask<Void, Void, Void>() {
@Override
protected Void doInBackground(Void... v) {
try {
firehoseRecorder.submitAllRecords();
} catch (AmazonClientException ace) {
// error occurs.
}
}
}.execute();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}