单击按钮时调用 class (Android)

Question

我是 Android 开发人员的新手。我有 2 个不同的 class (MainActivity.java & Upload.java)
我无法将 Upload.java 调用到 Main.Activity。
当我点击按钮时，应用程序崩溃了。
我做错了什么吗？

MainActivity.java

Button upload = (Button)findViewById(R.id.upload_Btn);

upload.setOnClickListener(new View.OnClickListener()
{
    @Override
    public void onClick(View v) 
    {
        Update_Table dbClient = new  Update_Table();

        try {
            dbClient.DynamoDBClient();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            Log.i("sys", "Success");
        }
    }
}

Upload.java

public class Update_Table
{
    private String tableName = "Test";
    private AmazonDynamoDBClient client =null;
 
    public void DynamoDBClient() throws IOException
    {
        AWSCredentials cred = new PropertiesCredentials(Update_Table.class
    .getResourceAsStream("AwsCredentials.properties"));
  
        client = new AmazonDynamoDBClient(cred);
    }
}

LOGCAT:

Answer 1

更改方法中的行，如下所示：-

 public class Update_Table
    {
        private String tableName = "Test";
        private AmazonDynamoDBClient client =null;

        public void DynamoDBClient() throws IOException
        {

       //changed the below line 
            AWSCredentials cred = new PropertiesCredentials(ClassLoader.getResourceAsStream("src/com.afdal.ftsmetheses/AwsCredentials.properties"));

//OR try this

AWSCredentials cred = new PropertiesCredentials(ClassLoader.getResourceAsStream("com.afdal.ftsmetheses/AwsCredentials.properties"));

            client = new AmazonDynamoDBClient(cred);

        }


    }

单击按钮时调用 class (Android)

Calling class on ButtonClick (Android)

java

eclipse

android

aws-sdk