我希望StartStop CardView上的背景颜色变为红色。它目前是绿色的。我该怎么做呢？
不幸的是StartStopCard.setCardBackgroundColor（Color.parseColor（“＃b70505”））;不管用。
我已将我的整个代码附在
之后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);
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);
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);
StartStopCard.setCardBackgroundColor(Color.parseColor("#b70505"));
}
}
});
}
@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;
case R.id.StartStopCard:?????
default:break;
}
}
任何帮助都将非常感谢非常感谢
答案 0 :(得分：0)
创建startStopCard视图或任何其他想要更改颜色的视图（布局背景），然后在onCreate中实例化它，然后在onClick开关的情况下，您可以通过以下方式设置颜色：startStopCard .setCardBackgroundColor（getResources（）的getColor（R.color.red））;
答案 1 :(得分：0)
如果R.id.StartStopCard id表示cardView而不是 -
@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;
case R.id.StartStopCard: ((CardView)v).setCardBackgroundColor((getResources().getColor(R.color.red)));
default:break;
}
}