CODEWITHSUNDEEP
javaandroidtextview
deathskiller
deathskiller

Reputation: 43

Append TextView of another activity through main

I'm trying to create a game log, to show what happened on each round of the game. The log is in another activity but I want to be updated constantly with whatever the player does. A player just presses buttons that do certain things. It's too much code to post, but I have made a new bundle, and an intent.

In MainActivity.

Bundle bundle = new Bundle();
Intent GameLogSwitch = new Intent(getApplicationContext(),GameLog.class);

I am trying to put this to send to the other activity but I don't know if you can put variables in it. otherwise it works with simple words such as ("key","It works")

GameLogSwitch.putExtra("Break","---BREAK---"+"\n"+Player1Name+": "+GreenResult.getText()+"("+GrTop1+","+GrTop2+","+GrTop3+")"+"\n"+Player2Name+": "+RedResult.getText()+"("+RdTop1+","+RdTop2+","+RdTop3+")");

and then of course I have this when the gamelog button is pressed

startActivity(GameLogSwitch);

Now in Gamelog.class i have this.

package com.example.adam.snookerproject;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;

public class GameLog extends AppCompatActivity {
        private TextView GameLogText;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_game_log);
        GameLogText = (TextView) findViewById(R.id.GameLogText);
        Intent GameLogSwitch = getIntent();
        String myString = GameLogSwitch.getStringExtra("Break");
        GameLogText.append(myString);
    }
}

I have a couple of questions. First, why does append only work once with my string when I start the activity i.e when I go back and press the same button again it won't write the same thing again underneath?

Secondly, it doesn't seem to work for my "Break" key, does this have to do with the fact that there are variables in the text I'm sending? It only works for simple text like GameLogSwitch.putExtra("key","It works");

There must be an easier way to do this! Thank you.

UPDATE 1: The answer from Drv does seem to work, but when I try to do GameLogText.append(AppConstants.log) it just replaces everything in the textview no matter how many times I press the button. I think the activity is just resetting each time I start it again. Any way around this?

Upvotes: 0

Views: 75

Answers (4)

halfer
halfer

Reputation: 20439

(Posted solution on behalf of the OP).

I managed to append using "\n"+AppConstants.log at the end of each output.

Upvotes: 0

Avinash Verma
Avinash Verma

Reputation: 2762

Use Callback or Interface. Fire the Interface from the Main Activity and Implement the call Interface in the Activity where you want the Textview to be Updated. Inside that method Update your Text View.

Read here More about Communication between Activity Activity and Fragment Activity

Upvotes: 0

Zijian
Zijian

Reputation: 227

Try to use getContext() instead of getApplicationContext, then check your string in debug mode

Upvotes: 0

Dhruvi
Dhruvi

Reputation: 1981

Make a global string in Constants class and use it wherever you want:

  public class AppConstants{

        public static String log="";
  }

Edit the string in the class where you are sending it in intent:

  AppConstants.log="---BREAK---"+"\n"+Player1Name+": "+GreenResult.getText()+"("+GrTop1+","+GrTop2+","+GrTop3+")"+"\n"+Player2Name+": "+RedResult.getText()+"("+RdTop1+","+RdTop2+","+RdTop3+")";

And use it in your class as:

  package com.example.adam.snookerproject;

  import android.content.Intent;
  import android.support.v7.app.AppCompatActivity;
  import android.os.Bundle;
  import android.widget.TextView;

  public class GameLog extends AppCompatActivity {
    private TextView GameLogText;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_game_log);

       GameLogText = (TextView) findViewById(R.id.GameLogText);

       //get your log here using AppConstants.log
   }
  }

Upvotes: 1

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