FlashCard:抽认卡应用

package com.futapo.andresflashcardapp; import androidx.appcompat.app.AppCompatActivity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.EditText; import android.widget.ImageView; import android.widget.TextView; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //simplifying "findViewById(R.id.nameOfView) TextView Answer = findViewById(R.id.Flash_Answer); TextView Question = findViewById(R.id.Flash_Question); ImageView Add = findViewById(R.id.add_Flash); //making question Invisible and Answer visible on touch Question.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Answer.setVisibility(View.VISIBLE); Question.setVisibility(View.INVISIBLE); } }); Answer.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Answer.setVisibility(View.INVISIBLE); Question.setVisibility(View.VISIBLE); } }); Add.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(MainActivity.this, added_flashcard.class); MainActivity.this.startActivityForResult(intent, 100); } }); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == 100) { // this 100 needs to match the 100 we used when we called startActivityForResult! String string1 = data.getExtras().getString("new_Question"); //Pulls newQuestion and prints to screen when saved. String string2 = data.getExtras().getString("new_Answer"); ((TextView) findViewById(R.id.Flash_Question)).setText(string1); ((TextView) findViewById(R.id.Flash_Answer)).setText(string2); } } }