如何在android中添加自定义数据到textview？

Question

I'm new to JAVA and Android. Previously, I was working on Javascript & Jquery.

As in HTML using Javascript (or Jquery) we can add custom data attribute to any element. for example-

$("#element").data("customdata", "customvalue");

And later I can get the value by doing-

var customvalue = $("#element").data("customdata");

Is there any method available in Android to achieve this type of thing?

Like, if I need to set multiple type of strings to a single TextView and later get them as needed.

Thank you all in advance.

Answer 1

You can get your textview from XML and set text on it. Something like this

TextView textView = findViewById(R.id.textview_id);
textView.setText("Your awesome text");

// Later fetch the text details back
String textDetails = textView.getText().toString();

This is a basic code sample of how to add and retrieve text from the text-view. Hope this help your case

Answer 2

You can use the View's setTag() and getTag() for that purpose.

However, most of the time there are cleaner ways like using ViewModel architecture etc. but that is a different story.

Answer 3

I saw your link. I think you can use AlertDialog.
this is my code.I think you would need it.

public class MainActivity extends AppCompatActivity {
   EditText e1;
    TextView t4;
   Buttob btn;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        t4=(TextView)findViewById(R.id.t4);
        t4.setOnClickListener(t4click);
        e1=(EditText)findViewById(R.id.e1);
       btn=(Button)findViewById(R.id.btn);
      btn.setOnClickListener(btnlogin);

    }

 private Button.OnClickListener btnlogin=new Button.OnClickListener(){
    //click button

        public void onClick(View v){
            String account=e1.getText().toString();//get edittext value
            String tmp="";
            tmp=t4.getText().toString()+account; //get textview value and add 
  edittext string
            t4.setText(tmp);//insert new value
            }
        }
    };
    private TextView.OnClickListener t4click=new TextView.OnClickListener(){
        @Override
    //if click textview it,would show dialog
   //if your dialog value is from edittext ,you can reuse it.
        public void onClick(View view) {
            new AlertDialog.Builder(MainActivity.this)
                    .setTitle("product")

                    .setMessage("item:pen"+"\nid=A001"+"\nprice:10 USD")
                    .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialoginterface, int i)
                        {
                        }
                    })
                    .show();
        }
    };

}