我的应用程序在自定义吐司中逐个显示所有包名，但问题是，我不希望在应用程序退出时在应用程序外显示吐司。我如何结束我的for循环或以某种方式阻止toast在toDestroy中显示？
public class MainActivity extends Activity {
float x1, x2;
float y1, y2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// show first time setup
SharedPreferences settings = getSharedPreferences("prefs", 0);
boolean firstRun = settings.getBoolean("firstRun", false);
if (firstRun == false)// if running for first time
{
SharedPreferences.Editor editor = settings.edit();
editor.putBoolean("firstRun", true);
editor.commit();
Intent intent = new Intent(this, Setup1.class);
startActivity(intent);
} else {
}
// **//
// NOTIFICATION ACTIVATOR
// Fire Notification from ReceiverReminder
Intent intent = new Intent(this, ReceiverReminder.class);
PendingIntent sender = PendingIntent.getBroadcast(this, 0, intent,
PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager am = (AlarmManager) this
.getSystemService(Context.ALARM_SERVICE);
long recurring = (1 * 10000); // in milliseconds
am.setRepeating(AlarmManager.RTC, Calendar.getInstance()
.getTimeInMillis(), recurring, sender);
//
// Fire Notification from Scheduler Daily
Intent intent1 = new Intent(this, ReceiverSchedulerDaily.class);
PendingIntent sender1 = PendingIntent.getBroadcast(this, 0, intent1,
PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager am1 = (AlarmManager) this
.getSystemService(Context.ALARM_SERVICE);
long recurring1 = (3 * 60000); // in milliseconds
am1.setRepeating(AlarmManager.RTC, Calendar.getInstance()
.getTimeInMillis(), recurring1, sender1);
//
// Fire Notification from Scheduler 3 Days
Intent intent11 = new Intent(this, ReceiverSchedulerThreeDays.class);
PendingIntent sender11 = PendingIntent.getBroadcast(this, 0, intent11,
PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager am11 = (AlarmManager) this
.getSystemService(Context.ALARM_SERVICE);
long recurring11 = (1 * 10000); // in milliseconds
am11.setRepeating(AlarmManager.RTC, Calendar.getInstance()
.getTimeInMillis(), recurring11, sender11);
//
// Fire Notification from Scheduler 7 Days
Intent intent111 = new Intent(this, ReceiverSchedulerWeekly.class);
PendingIntent sender111 = PendingIntent.getBroadcast(this, 0,
intent111, PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager am111 = (AlarmManager) this
.getSystemService(Context.ALARM_SERVICE);
long recurring111 = (1 * 10000); // in milliseconds
am111.setRepeating(AlarmManager.RTC, Calendar.getInstance()
.getTimeInMillis(), recurring111, sender111);
// --**--//
}
public boolean onTouchEvent(MotionEvent touchevent) {
switch (touchevent.getAction()) {
// when user first touches the screen we get x and y coordinate
case MotionEvent.ACTION_DOWN: {
x1 = touchevent.getX();
y1 = touchevent.getY();
break;
}
case MotionEvent.ACTION_UP: {
x2 = touchevent.getX();
y2 = touchevent.getY();
// if left to right sweep event on screen
if (x1 < x2) {
Intent intent = new Intent(this, UiNetMon.class);
startActivity(intent);
overridePendingTransition(R.anim.slide_right_out,
R.anim.slide_right_in);
finish();
}
// if right to left sweep event on screen
if (x1 > x2) {
Intent intent = new Intent(this, UiScheduler.class);
startActivity(intent);
overridePendingTransition(R.anim.slide_left_in,
R.anim.slide_left_out);
finish();
}
break;
}
}
return false;
}
public void optimize(View view) {
// clean all app caches
PackageManager pm = getPackageManager();
Method[] methods = pm.getClass().getDeclaredMethods();
for (Method m : methods) {
if (m.getName().equals("freeStorageAndNotify")) {
try {
long desiredFreeStorage = Long.MAX_VALUE;
m.invoke(pm, desiredFreeStorage, null);
} catch (Exception e) {
}
break;
}
}
//
// enable, disable wifi
WifiManager wifiManager = (WifiManager) this
.getSystemService(Context.WIFI_SERVICE);
wifiManager.setWifiEnabled(false);
wifiManager.setWifiEnabled(true);
//
// Process Killer and display all package names in toast
ActivityManager actvityManager = (ActivityManager) getApplicationContext()
.getSystemService(getApplicationContext().ACTIVITY_SERVICE);
List<RunningAppProcessInfo> procInfos = actvityManager
.getRunningAppProcesses();
for (int pnum = 0; pnum < procInfos.size(); pnum++) {
// if
// ((procInfos.get(pnum)).processName.contains("android")//prevent
// system apps from getting killed
// || (procInfos.get(pnum)).processName.contains("system")
// || (procInfos.get(pnum)).processName.contains("huawei")
// || (procInfos.get(pnum)).processName.contains("adil")) {
// // Toast.makeText(getApplicationContext(), "system apps",
// // Toast.LENGTH_SHORT).show();
// } else {
actvityManager
.killBackgroundProcesses(procInfos.get(pnum).processName);
LayoutInflater inflater = getLayoutInflater();
View layout = inflater.inflate(R.layout.custom_toast_layout,
(ViewGroup) findViewById(R.id.toast_layout_root));
TextView text = (TextView) layout.findViewById(R.id.text);
text.setText("optimized" + procInfos.get(pnum).processName);
Toast toast = new Toast(getApplicationContext());
toast.setGravity(Gravity.BOTTOM, 0, 0);
toast.setDuration(Toast.LENGTH_LONG);
toast.setView(layout);
toast.show();
//
}
}
@Override
protected void onDestroy() {
super.onDestroy();
}
}
答案 0 :(得分：2)
也许，您可以试试Snackbar？一旦用户离开你的应用程序，他们就会被解雇，他们看起来也很酷;）
https://developer.android.com/reference/android/support/design/widget/Snackbar.html
答案 1 :(得分：1)
首先将toast作为你的类的一个字段，即在成员函数之外声明。通常我们用'm'作为前缀。 之后，您应该以这种方式取消它：
public class MainActivity extends Activity {
float x1, x2;
float y1, y2;
Toast mToast;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// show first time setup
SharedPreferences settings = getSharedPreferences("prefs", 0);
boolean firstRun = settings.getBoolean("firstRun", false);
if (firstRun == false)// if running for first time
{
SharedPreferences.Editor editor = settings.edit();
editor.putBoolean("firstRun", true);
editor.commit();
Intent intent = new Intent(this, Setup1.class);
startActivity(intent);
} else {
}
// **//
// NOTIFICATION ACTIVATOR
// Fire Notification from ReceiverReminder
Intent intent = new Intent(this, ReceiverReminder.class);
PendingIntent sender = PendingIntent.getBroadcast(this, 0, intent,
PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager am = (AlarmManager) this
.getSystemService(Context.ALARM_SERVICE);
long recurring = (1 * 10000); // in milliseconds
am.setRepeating(AlarmManager.RTC, Calendar.getInstance()
.getTimeInMillis(), recurring, sender);
//
// Fire Notification from Scheduler Daily
Intent intent1 = new Intent(this, ReceiverSchedulerDaily.class);
PendingIntent sender1 = PendingIntent.getBroadcast(this, 0, intent1,
PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager am1 = (AlarmManager) this
.getSystemService(Context.ALARM_SERVICE);
long recurring1 = (3 * 60000); // in milliseconds
am1.setRepeating(AlarmManager.RTC, Calendar.getInstance()
.getTimeInMillis(), recurring1, sender1);
//
// Fire Notification from Scheduler 3 Days
Intent intent11 = new Intent(this, ReceiverSchedulerThreeDays.class);
PendingIntent sender11 = PendingIntent.getBroadcast(this, 0, intent11,
PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager am11 = (AlarmManager) this
.getSystemService(Context.ALARM_SERVICE);
long recurring11 = (1 * 10000); // in milliseconds
am11.setRepeating(AlarmManager.RTC, Calendar.getInstance()
.getTimeInMillis(), recurring11, sender11);
//
// Fire Notification from Scheduler 7 Days
Intent intent111 = new Intent(this, ReceiverSchedulerWeekly.class);
PendingIntent sender111 = PendingIntent.getBroadcast(this, 0,
intent111, PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager am111 = (AlarmManager) this
.getSystemService(Context.ALARM_SERVICE);
long recurring111 = (1 * 10000); // in milliseconds
am111.setRepeating(AlarmManager.RTC, Calendar.getInstance()
.getTimeInMillis(), recurring111, sender111);
// --**--//
}
public boolean onTouchEvent(MotionEvent touchevent) {
switch (touchevent.getAction()) {
// when user first touches the screen we get x and y coordinate
case MotionEvent.ACTION_DOWN: {
x1 = touchevent.getX();
y1 = touchevent.getY();
break;
}
case MotionEvent.ACTION_UP: {
x2 = touchevent.getX();
y2 = touchevent.getY();
// if left to right sweep event on screen
if (x1 < x2) {
Intent intent = new Intent(this, UiNetMon.class);
startActivity(intent);
overridePendingTransition(R.anim.slide_right_out,
R.anim.slide_right_in);
finish();
}
// if right to left sweep event on screen
if (x1 > x2) {
Intent intent = new Intent(this, UiScheduler.class);
startActivity(intent);
overridePendingTransition(R.anim.slide_left_in,
R.anim.slide_left_out);
finish();
}
break;
}
}
return false;
}
public void optimize(View view) {
// clean all app caches
PackageManager pm = getPackageManager();
Method[] methods = pm.getClass().getDeclaredMethods();
for (Method m : methods) {
if (m.getName().equals("freeStorageAndNotify")) {
try {
long desiredFreeStorage = Long.MAX_VALUE;
m.invoke(pm, desiredFreeStorage, null);
} catch (Exception e) {
}
break;
}
}
//
// enable, disable wifi
WifiManager wifiManager = (WifiManager) this
.getSystemService(Context.WIFI_SERVICE);
wifiManager.setWifiEnabled(false);
wifiManager.setWifiEnabled(true);
//
// Process Killer and display all package names in mToast
ActivityManager actvityManager = (ActivityManager) getApplicationContext()
.getSystemService(getApplicationContext().ACTIVITY_SERVICE);
List<RunningAppProcessInfo> procInfos = actvityManager
.getRunningAppProcesses();
for (int pnum = 0; pnum < procInfos.size(); pnum++) {
// if
// ((procInfos.get(pnum)).processName.contains("android")//prevent
// system apps from getting killed
// || (procInfos.get(pnum)).processName.contains("system")
// || (procInfos.get(pnum)).processName.contains("huawei")
// || (procInfos.get(pnum)).processName.contains("adil")) {
// // Toast.makeText(getApplicationContext(), "system apps",
// // Toast.LENGTH_SHORT).show();
// } else {
actvityManager
.killBackgroundProcesses(procInfos.get(pnum).processName);
LayoutInflater inflater = getLayoutInflater();
View layout = inflater.inflate(R.layout.custom_toast_layout,
(ViewGroup) findViewById(R.id.toast_layout_root));
TextView text = (TextView) layout.findViewById(R.id.text);
text.setText("optimized" + procInfos.get(pnum).processName);
mToast = new Toast(getApplicationContext());
mToast.setGravity(Gravity.BOTTOM, 0, 0);
mToast.setDuration(Toast.LENGTH_LONG);
mToast.setView(layout);
mToast.show();
//
}
}
@Override
protected void onStop() {
if(mToast != null) {
mToast.cancel();
}
super.onStop();
}
}
我希望这会有所帮助。
答案 2 :(得分：1)
是的，只要你使用toastObject.cancel()方法来隐藏吐司。
答案 3 :(得分：1)
你有很多Toast，因为它们是在一个循环中创建的。您只需在onDestroy。
...
mPendingToasts.clear();
for (int pnum = 0; pnum < procInfos.size(); pnum++) {
...
Toast toast = new Toast(getApplicationContext());
...
mPendingToasts.add(toast);
toast.show();
}
}
private ArrayList<Toast> mPendingToasts = new ArrayList<Toast>();
@Override
protected void onDestroy() {
for(Toast toast:mPendingToasts){
toast.cancel();
}
super.onDestroy();
}
请注意，取消Toast只会阻止它们显示。无论如何，你的循环中的逻辑（即杀死proc）将被执行。 （即显示Toast是异步的）