更改临时按钮的颜色

Question

我编写了一个测验，现在我希望每次按下正确的答案/按钮（mButtonChoice）时按钮的背景都会变成绿色，之后它将被设置为默认值。

所以正确的按钮应该是“彩色”绿色，然后像以前一样。我该如何设法做到这一点？

QuizActicity（这里是问题和选择）： - 你应该习惯使用在线文档您使用的组件

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

    createDialog(); 
    Button dialogButton = (Button) findViewById(R.id.dialogbtn); 
    dialogButton.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      dialog.show(); 

     } 
    }); 

    closeButton.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      dialog.dismiss(); 
     } 
    }); 

    TextView shareTextView = (TextView) findViewById(R.id.share); 
    shareTextView.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      Intent myIntent = new Intent(Intent.ACTION_SEND); 
      myIntent.setType("text/plain"); 
      myIntent.putExtra(Intent.EXTRA_SUBJECT, "Hello!"); 
      myIntent.putExtra(Intent.EXTRA_TEXT, "My highscore in Quizzi is very high! I bet you can't beat me except you are cleverer than me. Download the app now!"); 
      startActivity(Intent.createChooser(myIntent, "Share with:")); 
     } 
    }); 

    mQuestionLibrary.shuffle(); 


    setSupportActionBar((Toolbar) findViewById(R.id.nav_action)); 
    DrawerLayout mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout); 
    mToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.string.open, R.string.close); 
    mDrawerLayout.addDrawerListener(mToggle); 
    mToggle.syncState(); 
    getSupportActionBar().setDisplayHomeAsUpEnabled(true); // Able to see the Navigation Burger "Button" 

    ((NavigationView) findViewById(R.id.nv1)).setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() { 
     @Override 
     public boolean onNavigationItemSelected(MenuItem menuItem) { 
      switch (menuItem.getItemId()) { 
       case R.id.nav_stats: 
        startActivity(new Intent(QuizActivity.this, Menu2.class)); 
        break; 
       case R.id.nav_about: 
        startActivity(new Intent(QuizActivity.this, Menu3.class)); 
        break; 
      } 

      return true; 
     } 
    }); 

    mScoreView = (TextView) findViewById(R.id.score_score); 
    mQuestionView = (TextView) findViewById(R.id.question); 
    mButtonChoice1 = (Button) findViewById(R.id.choice1); 
    mButtonChoice2 = (Button) findViewById(R.id.choice2); 
    mButtonChoice3 = (Button) findViewById(R.id.choice3); 

    List<Button> choices = new ArrayList<>(); 
    choices.add(mButtonChoice1); 
    choices.add(mButtonChoice2); 
    choices.add(mButtonChoice3); 

    updateQuestion(); 

    for (final Button choice : choices) { 
     choice.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       if (choice.getText().equals(mAnswer)) { 

        updateScore(); 
        updateQuestion(); 

        Toast.makeText(QuizActivity.this, "Correct", Toast.LENGTH_SHORT).show(); 
       } else { 
        Toast.makeText(QuizActivity.this, "Wrong... Try again!", Toast.LENGTH_SHORT).show(); 

        Intent intent = new Intent(QuizActivity.this, Menu2.class); 
        intent.putExtra("score", mScore); // pass score to Menu2 
        startActivity(intent); 
       } 
      } 
     }); 
    } 

} 

private void updateQuestion() { 
    if (mQuestionNumber < mQuestionLibrary.getLength()) { 
     mQuestionView.setText(mQuestionLibrary.getQuestion(mQuestionNumber)); 
     mButtonChoice1.setText(mQuestionLibrary.getChoice1(mQuestionNumber)); 
     mButtonChoice2.setText(mQuestionLibrary.getChoice2(mQuestionNumber)); 
     mButtonChoice3.setText(mQuestionLibrary.getChoice3(mQuestionNumber)); 
     mAnswer = mQuestionLibrary.getCorrectAnswer(mQuestionNumber++); 
    } else { 
     Toast.makeText(QuizActivity.this, "Last Question! You are very intelligent!", Toast.LENGTH_SHORT).show(); 
     Intent intent = new Intent(QuizActivity.this, Menu2.class); 
     intent.putExtra("score", mScore); 
     startActivity(intent); 
    } 
} 

private void updateScore() { 
    mScoreView.setText(String.valueOf(++mScore)); 

    SharedPreferences mypref = getPreferences(MODE_PRIVATE); 
    int highScore = mypref.getInt("highScore", 0); 

    if (mScore > highScore) { 
     SharedPreferences.Editor editor = mypref.edit(); 
     editor.putInt("highScore", mScore); 
     editor.apply(); 
    } 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    return mToggle.onOptionsItemSelected(item) || super.onOptionsItemSelected(item); 
} 

private void createDialog() { 
    dialog = new Dialog(this); 
    dialog.setTitle("Tutorial"); 
    dialog.setContentView(R.layout.popup_menu1_1); 
    closeButton = (TextView) dialog.findViewById(R.id.closeTXT); 
} 
    } 

Answer 1

作为一个Java开发。

当你看机器人会Button类的API描述（https://developer.android.com/reference/android/widget/Button.html），你可能会发现，从机器人会继承方法setBackgroundColor(int color)View类（https://developer.android.com/reference/android/view/View.html#setBackgroundColor(int)）

然后你只需要调用该方法在两个正确的放置在您的程序中。

Answer 2

设置Button的“背景颜色”有点棘手。默认情况下，每个Button都有一个由Android系统管理的背景，其中包括诸如圆角，仅在特定区域内的颜色等。如果您只需致电setBackgroundColor()，则会失去所有这些复杂的行为，并留下一个扁平的矩形。

我假设你在这里从AppCompatActivity延伸。如果没有，这个答案将无法正常工作。

要更改Button的背景颜色，同时仍保持了圆润的造型及连锁反应，使用ViewCompat.setBackgroundTintList()如下：

Button dialogButton = (Button) findViewById(R.id.dialogbtn); 
    int color = ContextCompat.getColor(this, R.color.yourColorResourceHere); 
    ColorStateList tintList = ColorStateList.valueOf(color); 
    ViewCompat.setBackgroundTintList(dialogButton, tintList);