安卓工作室 : CardView change function once clicked

Question

我目前正在使用 CardView 作为 Activity 中的开始按钮。但是，一旦我单击了 CardView，我就需要背景颜色随文本和功能一起更改为我的 STOP Activity 。

  public class LandingPage extends AppCompatActivity implements View.OnClickListener {

    private CardView appsCard, parentalControlsCard, customSettingsCard, activateCard, StartStopCard;
    private TextView lockStatus, processStatus;
    private AlarmManager alarmManager;
    private ArrayList<RuleSet> ruleSets = null;
    private boolean mStarted = false;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.mainactivity);
        lockStatus = (TextView) findViewById(R.id.onOff);
        processStatus = (TextView) findViewById(R.id.processStartStop);
        StartStopCard = (CardView) findViewById(R.id.StartStopCard);

        alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);

        final Intent intent = new Intent(LandingPage.this, LockOptionReceiver.class);
        SharedPreferences setting = getSharedPreferences("PREFS", 0);
        String switcher = setting.getString("lockStatus", "");
        setStatus(switcher);
        String switcher2 = setting.getString("processStatus" , "");
        setProcess(switcher2);


        try {
            ruleSets = RuleSetList.retrieveRuleSet(this);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }


        //Defining Cards on Landing Page
        appsCard = (CardView) findViewById(R.id.apps_card);
        parentalControlsCard = (CardView) findViewById(R.id.parentalControls_id);
        customSettingsCard = (CardView) findViewById(R.id.customSettings);
        activateCard = (CardView) findViewById(R.id.activate_id);
        StartStopCard = (CardView) findViewById(R.id.StartStopCard);


        //Add OnClick Listeners
        appsCard.setOnClickListener(this);
        parentalControlsCard.setOnClickListener(this);
        customSettingsCard.setOnClickListener(this);
        StartStopCard.setOnClickListener(this);
        activateCard.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (ruleSets.isEmpty()) {
                    Toast.makeText(LandingPage.this, "You did not create a custom setting.", Toast.LENGTH_SHORT).show();
                } else {
                    PendingIntent pending_start;
                    PendingIntent pending_stop;
                    Intent startIntent = new Intent(LandingPage.this, LockOptionReceiver.class);
                    Intent stopIntent = new Intent(LandingPage.this, LockOptionReceiver.class);
                    Calendar startTime = new GregorianCalendar();
                    Calendar endTime = new GregorianCalendar();
                    String startString = ruleSets.get(0).getStartTime();
                    String endString = ruleSets.get(0).getEndTime();

                    String[] startArr = startString.split(":");
                    String[] endArr = endString.split(":");

                    startTime.set(Calendar.HOUR_OF_DAY, Integer.parseInt(startArr[0]));
                    startTime.set(Calendar.MINUTE, Integer.parseInt(startArr[1]));

                    endTime.set(Calendar.HOUR_OF_DAY, Integer.parseInt(endArr[0]));
                    endTime.set(Calendar.MINUTE, Integer.parseInt(endArr[1]));

                    pending_start = PendingIntent.getBroadcast(LandingPage.this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
                    pending_stop = PendingIntent.getBroadcast(LandingPage.this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

                    startIntent.putExtra("status", "start");
                    stopIntent.putExtra("status", "stop");

                    Toast.makeText(LandingPage.this, "Your ruleset will start at " + startString, Toast.LENGTH_SHORT).show();

                    setStatus("Lock Active");
                    setProcess("Stop");

                    alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, AlarmManager.INTERVAL_DAY, startTime.getTimeInMillis(), pending_start);
                    alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, AlarmManager.INTERVAL_DAY, startTime.getTimeInMillis(), pending_stop);
                }
            }
        });


        final CardView StartStopCard = (CardView) findViewById(R.id.StartStopCard);
        StartStopCard.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (mStarted) {
                    mStarted=false;
                    SharedPreferences setting = getSharedPreferences("PREFS", 0);
                    SharedPreferences.Editor editor = setting.edit();
                    editor.remove("switcher");
                    editor.remove("switcher2");
                    editor.remove("lockStatus");
                    editor.remove("processStatus");
                    editor.commit();
                    editor.putString("switcher", "true");
                    editor.putString("switcher2", "true");
                    editor.putString("lockStatus", "Lock Active");
                    editor.putString("processStatus", "Start");
                    editor.apply();
                    intent.putExtra("status", "start");
                    sendBroadcast(intent);
                    intent.putExtra("processStatus", "start");
                    sendBroadcast(intent);
                    String status = setting.getString("lockStatus", "");
                    setStatus(status);
                    String processStatus = setting.getString("processStatus" , "");
                    setProcess(processStatus);

                }

                else {
                    mStarted= true;
                    SharedPreferences setting = getSharedPreferences("PREFS", 0);
                    SharedPreferences.Editor editor = setting.edit();
                    editor.remove("switcher");
                    editor.remove("switcher2");
                    editor.remove("lockStatus");
                    editor.remove("processStatus");
                    editor.commit();
                    editor.putString("switcher", "false");
                    editor.putString("switcher2", "false");
                    editor.putString("lockStatus", "Lock Deactivated");
                    editor.putString("processStatus", "Stop");
                    editor.apply();
                    intent.putExtra("status", "stop");
                    sendBroadcast(intent);
                    intent.putExtra("processStatus", "start");
                    sendBroadcast(intent);
                    String status = setting.getString("lockStatus", "");
                    setStatus(status);
                    String processStatus = setting.getString("processStatus" , "");
                    setProcess(processStatus);

                }
            }

        });

    }



    @Override
    public void onClick(View v) {

        Intent i;

        switch (v.getId()) {
            case R.id.apps_card:
                i = new Intent(this, AppList.class);
                startActivity(i);
                break;
            case R.id.parentalControls_id:
                i = new Intent(this, ParentalWelcomeActivity.class);
                startActivity(i);
                break;
            case R.id.customSettings:
                i = new Intent(this, ViewRuleSets.class);
                startActivity(i);
                break;
            case R.id.activate_id:
                i = new Intent(this, RuleSet.class);
                startActivity(i);
                break;
            default:
                break;

        }
    }



    private void setStatus(String s) {
        lockStatus.setText(s);
    }

    private void setProcess(String s) { processStatus.setText(s);}


    public void ruleSet(View view) {
        Intent intent = new Intent(this, ViewRuleSets.class);
        startActivity(intent);
    }


}

我目前正在使用 CardView 作为 Activity 中的开始按钮。但是，一旦我点击了 CardView，我需要背景颜色随文本和功能一起更改为我的 STOP Activity 。

Answer 1

例如，设置一个名为 mStarted 的类成员变量，并将其初始设置为“false”。

private boolean mStarted = false;

现在在您的 onClick() 监听器中，翻转此变量的值，然后检查它以确定操作过程。

CardView startStopCard = (CardView) findViewById(R.id.StartStopCard);
startStopCard .setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        mStarted = !mStarted;
        if (mStarted) {
            // do start stuff 
        } else {
            // do stop stuff
        }
    }
}