java - 优先禁用声音无法正常工作

Question

我有一个首选项 Activity ，其中只有一个设置，即声音打开或关闭，它在我的所有游戏中都运行良好，除了在我的主菜单中，我仍然可以听到按钮点击声音。但是，当我退出游戏并重新启动后，我的声音就消失了。我的所有 Activity 中的代码都是完全相同的，但不知何故，它在游戏重新启动之前不适用于主要 Activity 。这是怎么回事？显然代码可以工作，但有些地方不对劲。无论如何，这是代码，不是全部，只是与此问题相关的代码...只有一个按钮，用于退出...下面，以防万一，我将发布整个 Activity 代码:

public boolean music;
MediaPlayer buttonClicks;

SharedPreferences getPrefs = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
        music = getPrefs.getBoolean("checkbox", true);

buttonClicks = MediaPlayer.create(this, R.raw.click);

dugme5.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                if(music == true){
                    buttonBack.start();
                        }
                finish();

            }
        });

全类:

public class Menu extends SwarmActivity implements OnClickListener{

    private boolean isNetworkConnected() {
          ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
          NetworkInfo ni = cm.getActiveNetworkInfo();
          if (ni == null) {
           // There are no active networks.
           return false;
          } else
           return true;
         }


    MediaPlayer buttonClicks;
    MediaPlayer buttonBack;
    Button dugme1, dugme2, dugme3, dugme4, dugme5, dugme6;
    TextView tvKviz;
    public boolean music;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        SharedPreferences getPrefs = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
        music = getPrefs.getBoolean("checkbox", true);

        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

        setContentView(R.layout.menu);

        //if ( Swarm.isEnabled() ) {
        Swarm.init(this, 4583, "e8398d93819da3d6d5f7d13f5b5a0deb");
        //}

        addListenerOnButton();

        boolean firstrun = getSharedPreferences("PREFERENCE", MODE_PRIVATE).getBoolean("firstrun", true);
        if (!firstrun){
            Intent swarm = new Intent("rs.androidaplikacijekvizopstekulture.SWARMPOPUP");
            startActivity(swarm);
        // Save the state
        getSharedPreferences("PREFERENCE", MODE_PRIVATE)
            .edit()
            .putBoolean("firstrun", false)
            .commit();
        }

        if ((!firstrun)&&(!isNetworkConnected())){
            Intent netPopup = new Intent("rs.androidaplikacijekvizopstekulture.NETPOPUP");
            startActivity(netPopup);
        }
    }





    private void addListenerOnButton() {
        Typeface naslov = Typeface.createFromAsset(getAssets(), "Lobster.ttf");
        Typeface dugmad = Typeface.createFromAsset(getAssets(), "Bebas.ttf");
        buttonClicks = MediaPlayer.create(this, R.raw.click);
        buttonBack = MediaPlayer.create(this, R.raw.button31);
        tvKviz = (TextView) findViewById(R.id.tvKviz);
        dugme1 = (Button) findViewById(R.id.bStart);
        dugme2 = (Button) findViewById(R.id.bPravila);
        dugme3 = (Button) findViewById(R.id.bTopScores);
        dugme4 = (Button) findViewById(R.id.bPodesavanja);
        dugme5 = (Button) findViewById(R.id.bIzlaz);
        dugme6 = (Button) findViewById(R.id.bKontakt);
        dugme1.setTypeface(dugmad);
        dugme2.setTypeface(dugmad);
        dugme3.setTypeface(dugmad);
        dugme4.setTypeface(dugmad);
        dugme5.setTypeface(dugmad);
        dugme6.setTypeface(dugmad);

        tvKviz.setTypeface(naslov);

        dugme1.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                if(music == true){
            buttonClicks.start();
                }
            startActivity(new Intent("rs.androidaplikacijekvizopstekulture.IZBOR"));

            }
        });
        dugme2.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                if(music == true){
                    buttonClicks.start();
                    Intent pref = new Intent("rs.androidaplikacijekvizopstekulture.PRAVILA");
                    startActivity(pref);
                        }
            }

        });

        dugme3.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                if(music == true){
                    buttonClicks.start();
                        }
                Swarm.showLeaderboards();
            }
        });

        dugme4.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                if(music == true){
                    buttonClicks.start();
                        }
                Intent pref = new Intent("rs.androidaplikacijekvizopstekulture.PREFS");
                startActivity(pref);

            }
        });
        dugme5.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                if(music == true){
                    buttonBack.start();
                        }
                finish();

            }
        });
        dugme6.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                if(music == true){
                    buttonClicks.start();
                        }
                Intent email = new Intent(Intent.ACTION_SEND);

                email.putExtra(Intent.EXTRA_EMAIL, new String[] { "<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="523f332038333c303328333e333112353f333b3e7c313d3f" rel="noreferrer noopener nofollow">[email protected]</a>" });
                // email.putExtra(Intent.EXTRA_CC, new String[]{ to});
                // email.putExtra(Intent.EXTRA_BCC, new String[]{to});
                email.putExtra(Intent.EXTRA_SUBJECT, "subject...");
                email.putExtra(Intent.EXTRA_TEXT, "poruka...");

                // need this to prompts email client only
                email.setType("message/rfc822");

                try {
                    startActivity(Intent.createChooser(email, "Send mail..."));
                } catch (android.content.ActivityNotFoundException ex) {
                    Toast.makeText(Menu.this, "There are no email clients installed.", Toast.LENGTH_SHORT).show();
                }

            }
        });

    }


    public boolean onCreateOptionsMenu(android.view.Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
    public boolean onOptionsItemSelected(MenuItem item){
        switch (item.getItemId()){
        case R.id.menu_contact:
            Intent email = new Intent(Intent.ACTION_SEND);

            email.putExtra(Intent.EXTRA_EMAIL, new String[] { "<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="254844574f444b47445f44494446654248444c490b464a48" rel="noreferrer noopener nofollow">[email protected]</a>" });
            // email.putExtra(Intent.EXTRA_CC, new String[]{ to});
            // email.putExtra(Intent.EXTRA_BCC, new String[]{to});
            email.putExtra(Intent.EXTRA_SUBJECT, "subject...");
            email.putExtra(Intent.EXTRA_TEXT, "poruka...");

            // need this to prompts email client only
            email.setType("message/rfc822");

            try {
                startActivity(Intent.createChooser(email, "Send mail..."));
            } catch (android.content.ActivityNotFoundException ex) {
                Toast.makeText(Menu.this, "There are no email clients installed.", Toast.LENGTH_SHORT).show();
            }
            return true;
        }
        return false;
    }

    public void onClick(View v) {
        // TODO Auto-generated method stub

    }

}

Answer 1

您将在 Activity 的 onCreate() 方法中获取首选项。除非您在某处 finish() 您的主 Activity，否则它将保持“已创建”状态，直到该 Activity 由于其他原因完成或被系统关闭。

如果您获得首选项并在 onStart() 或 onRestart() 中更新声音设置，我想您会发现它按预期工作。