java - 为整个应用设置静音/取消静音复选框

Question

您好，我编写了一个测验，一切正常，当我在Dialog2中选中checkBoxmp Checkbox时， Activity 被静音。我设置为当用户失败时，他将定向到第二个 Activity 。有一个按钮“重新开始测验”，使用户重新进入主要 Activity 。问题是当我这样做时，应用程序不再静音了。感谢您的光临!

主要 Activity

             public class QuizActivity extends AppCompatActivity {

private ActionBarDrawerToggle mToggle;

private QuestionLibrary mQuestionLibrary = new QuestionLibrary();

private TextView mScoreView;
private TextView mQuestionView;
private Button mButtonChoice1;
private Button mButtonChoice2;
private Button mButtonChoice3;
private String mAnswer;
private int mScore = 0;
private int mQuestionNumber = 0;
Dialog dialog;
Dialog dialog2;
TextView closeButton;
TextView closeButton2;
CheckBox checkBoxmp;


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

    final MediaPlayer mp = new MediaPlayer();
    final MediaPlayer mp2 = MediaPlayer.create(this,R.raw.wrong);
    final SharedPreferences sharedPref =getPreferences(Context.MODE_PRIVATE);


    boolean isChecked = sharedPref.getBoolean("isChecked", false);

        if (isChecked){

        mp.setVolume(0,0);
        mp2.setVolume(0,0);

    }


    else{mp.setVolume(1,1);}

    //Dialog 1
    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();
        }
    });
    //end Dialog 1

    //Dialog 2
    createDialog2();
    Button dialogButton2 = (Button) findViewById(R.id.dialogbtn2);
    dialogButton2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            dialog2.show();

        }
    });


    closeButton2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            dialog2.dismiss();
        }
    });
    //end Dialog 2




    //cb


    checkBoxmp.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            SharedPreferences.Editor editor = sharedPref.edit();
            editor.putBoolean("isChecked", isChecked);
            editor.commit();
        }
    })
    ;


    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! https://play.google.com/store/apps/details?id=amapps.impossiblequiz");
            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);

    final 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)) {


                    try {
                        mp.reset();
                        AssetFileDescriptor afd;
                        afd = getAssets().openFd("sample.mp3");
                        mp.setDataSource(afd.getFileDescriptor(),afd.getStartOffset(),afd.getLength());
                        mp.prepare();
                        mp.start();
                    } catch (IllegalStateException e) {
                        e.printStackTrace();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                    updateScore();
                    updateQuestion();
                    Toast.makeText(QuizActivity.this, "Correct", Toast.LENGTH_SHORT).show();



                } else {
                    mp2.start();
                    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);
}


private void createDialog2() {
    dialog2 = new Dialog(this);
    dialog2.setTitle("Settings");
    dialog2.setContentView(R.layout.popup_menu1_2);
    closeButton2 = (TextView) dialog2.findViewById(R.id.closeTXT2);
    checkBoxmp = (CheckBox) dialog2.findViewById(R.id.ckeckBox);


}

}

Menu2(第二个 Activity )

             public class Menu2 extends AppCompatActivity {

private int mScore;
private ActionBarDrawerToggle mToggle;


@Override
public void onBackPressed() {
    Intent intent =new Intent(Menu2.this,QuizActivity.class);
    startActivity(intent);
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_menu2);




    TextView txtScore = (TextView) findViewById(R.id.textScore2);
    TextView txtHighScore = (TextView) findViewById(R.id.textHighScore);

    ImageView trophy1 = (ImageView) findViewById(R.id.trophy1);
    ImageView trophy2 = (ImageView) findViewById(R.id.trophy2);
    ImageView trophy3 = (ImageView) findViewById(R.id.trophy3);
    ImageView trophy4 = (ImageView) findViewById(R.id.trophy4);
    ImageView trophy5 = (ImageView) findViewById(R.id.trophy5);
    ImageView trophy6 = (ImageView) findViewById(R.id.trophy6);
    ImageView genius60Score = (ImageView)findViewById(R.id.genius60Img);
    ImageView trophyImgBefore60 = (ImageView)findViewById(R.id.statsTrophy);




    Intent intent = getIntent();
    mScore = intent.getIntExtra("score", 0);
    txtScore.setText(String.format("Your score: %d", mScore));

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



    if (mScore > highScore) {
        highScore = mScore;

        txtHighScore.setText(String.format("High score: %d", mScore));

        SharedPreferences.Editor editor = mypref.edit();
        editor.putInt("highScore", mScore);
        editor.apply();
    } else {
        txtHighScore.setText(String.format("High score: %d", highScore));
    }

    if (highScore >= 10) {
        trophy1.setVisibility(View.VISIBLE);
    }

    if (highScore >= 20) {
        trophy2.setVisibility(View.VISIBLE);
    }

    if (highScore >= 30) {
        trophy3.setVisibility(View.VISIBLE);
    }

    if (highScore >= 40) {
        trophy4.setVisibility(View.VISIBLE);
    }

    if (highScore >=50) {
        trophy5.setVisibility(View.VISIBLE);
    }

    if (highScore >= 60) {
        trophy6.setVisibility(View.VISIBLE);
        trophyImgBefore60.setVisibility(View.GONE);
        genius60Score.setVisibility(View.VISIBLE);
    }

    final List<ImageView> containers = new ArrayList<>();
    containers.add(trophy1);
    containers.add(trophy2);
    containers.add(trophy3);
    containers.add(trophy4);
    containers.add(trophy5);
    containers.add(trophy6);

    final List<Integer> dialogs = new ArrayList<>();
    dialogs.add(R.layout.popup_menu2_1);
    dialogs.add(R.layout.popup_menu2_2);
    dialogs.add(R.layout.popup_menu2_3);
    dialogs.add(R.layout.popup_menu2_4);
    dialogs.add(R.layout.popup_menu2_5);
    dialogs.add(R.layout.popup_menu2_6);

    for (int i = 0; i < containers.size(); i++) {
        final int j = i;

        containers.get(j).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                final Dialog dialog = new Dialog(Menu2.this);
                dialog.setTitle("Trophies");
                dialog.setContentView(dialogs.get(j));
                dialog.show();
            }
        });
    }

    setSupportActionBar((Toolbar) findViewById(R.id.nav_action));
    DrawerLayout drawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout2);

    mToggle = new ActionBarDrawerToggle(this, drawerLayout, R.string.open, R.string.close);
    drawerLayout.addDrawerListener(mToggle);
    mToggle.syncState();
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);

    NavigationView mNavigationView = (NavigationView) findViewById(nv2);
    mNavigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {

        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
            switch (menuItem.getItemId()) {
                case R.id.nav_home2:
                    startActivity(new Intent(Menu2.this, QuizActivity.class));
                    break;
                case R.id.nav_about2:
                    startActivity(new Intent(Menu2.this, Menu3.class));
                    break;
            }

            return true;
        }
    });
}

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

public void onClick(View view) {
    Intent intent = new Intent(Menu2.this, QuizActivity.class);
    intent.putExtra("score", mScore);
    startActivity(intent);
}

}

Answer 1

您需要保留复选框的状态并在初始化mp时读取它，这很容易 SharedPreferences帮助您即使通过重新启动也可以通过所有应用程序存储状态。

像这样声明:

SharedPreferences sharedPref =getPreferences(Context.MODE_PRIVATE);

添加数据并提交:

SharedPreferences.Editor editor = sharedPref.edit();
editor.putBoolean("isChecked", false);
editor.commit();

在 CheckBox上:

checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        SharedPreferences.Editor editor = sharedPref.edit();
        editor.putBoolean("isChecked", isChecked);
        editor.commit();
    }
})

;

在开始时的每个 Activity 中获取数据:

boolean isChecked = sharedPref.getBoolean("isChecked", false);