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[英]How to make one button do a task that depends on which previous buttons has been clicked in Java android?
[英]how to find which button has been clicked in app widgets in android?
我想設計簡單的應用程序小部件,它有兩個 textview 和兩個用於上一個/下一個的按鈕。 我越來越難以處理應用程序小部件中的按鈕單擊。 實際上我的願望是,如果用戶單擊上一個按鈕我想顯示以前的值,如果用戶單擊下一步按鈕我想顯示數據庫中的下一個值。 如何知道點擊了哪個按鈕? 在這里我像這樣注冊按鈕點擊監聽器
public static class UpdateWidgetService extends IntentService {
public UpdateWidgetService() {
super("UpdateWidgetService");
}
@Override
protected void onHandleIntent(Intent intent) {
AppWidgetManager appWidgetManager = AppWidgetManager
.getInstance(this);
int incomingAppWidgetId = intent.getIntExtra(EXTRA_APPWIDGET_ID,
INVALID_APPWIDGET_ID);
if (incomingAppWidgetId != INVALID_APPWIDGET_ID) {
updateOneAppWidget(appWidgetManager, incomingAppWidgetId);
}
}
private void updateOneAppWidget(AppWidgetManager appWidgetManager,
int appWidgetId) {
DatabaseManager dbManager = new DatabaseManager(this);
dbManager.open();
String contactNumber, date, status, message;
ArrayList<QueuedMessage> listOfQuedMessage = (ArrayList<QueuedMessage>) dbManager
.fetchContactNumber();
if (listOfQuedMessage.size() == 0)
Log.i("Db", "null");
else{
date = dbManager.fetchDate();
message = dbManager.fetchMessage();
status = dbManager.fetchStatus();
dbManager.closeDatabase();
RemoteViews views = new RemoteViews(this.getPackageName(),
R.layout.schdulesms_appwidget_layout);
views.setTextViewText(R.id.to_appwidget_saved_data,
listOfQuedMessage.get(count).contacNumber);
views.setTextViewText(R.id.date_appwidget_saved_data, date);
views.setTextViewText(R.id.status_appwidget_saved, status);
views.setTextViewText(R.id.message_appwidgset_saved_data, message);
**//here i want do**
if(button1){
btnNxtClick(views, appWidgetId,listOfQuedMessage.size());
}else{
btPrevClick(views, appWidgetId, listOfQuedMessage.size());
}
appWidgetManager.updateAppWidget(appWidgetId, views);
}
}
private void btnNxtClick(RemoteViews views, int appWidgetId,int sizeOfList) {
Intent btnNextIntent = new Intent(this, this.getClass());
btnNextIntent.putExtra(EXTRA_APPWIDGET_ID, appWidgetId);
PendingIntent btnNextPendingIntent = PendingIntent.getService(this,
0, btnNextIntent, PendingIntent.FLAG_UPDATE_CURRENT);
views.setOnClickPendingIntent(R.id.btnNext, btnNextPendingIntent);
}
private void btPrevClick(RemoteViews views, int appWidgetId,int sizeOfList) {
Intent btnNextIntent = new Intent(this, this.getClass());
btnNextIntent.putExtra(EXTRA_APPWIDGET_ID, appWidgetId);
PendingIntent btnNextPendingIntent = PendingIntent.getService(this,
0, btnNextIntent, PendingIntent.FLAG_UPDATE_CURRENT);
views.setOnClickPendingIntent(R.id.btnPrev, btnNextPendingIntent);
}
}
誰能幫我解決這個問題?? 謝謝
知道單擊了哪個按鈕,請按照以下步驟操作:
第一步:為btnNext和btnPrev注冊兩個reciver
<intent-filter >
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
<action android:name="com.app.example.MyWidget.ACTION_WIDGET_CLICK_NEXT"/>
<action android:name="com.app.example.MyWidget.ACTION_WIDGET_CLICK_PREV"/>
</intent-filter>
第 2 步:對於 btnNext 和 btnPrev 操作字符串:
public class MyWidget extends AppWidgetProvider {
public static String ACTION_WIDGET_CLICK_NEXT = "Action_nextbtn";
public static String ACTION_WIDGET_CLICK_PREV = "Action_prevbtn";
}
第 3 步:在 onReceive 中
@Override
public void onReceive(Context paramContext, Intent paramIntent)
{
String str = paramIntent.getAction();
if (paramIntent.getAction().equals(ACTION_WIDGET_CLICK_NEXT)) {
updateWidgetState(paramContext, str);
}
if (paramIntent.getAction().equals(ACTION_WIDGET_CLICK_PREV)) {
updateWidgetState(paramContext, str);
}
}
第 4 步:創建更新小部件狀態的方法:
static void updateWidgetState(Context paramContext, String paramString)
{
RemoteViews localRemoteViews = buildUpdate(paramContext, paramString);
ComponentName localComponentName = new ComponentName(paramContext, MyWidget.class);
AppWidgetManager.getInstance(paramContext).updateAppWidget(localComponentName, localRemoteViews);
}
第 5 步:
private static RemoteViews buildUpdate(Context paramContext, String paramString)
{
rview = new RemoteViews(paramContext.getPackageName(), R.layout.widget_layout);
Intent activebtnnext = new Intent(paramContext, MyWidget.class);
active.setAction(ACTION_WIDGET_CLICK_NEXT);
PendingIntent configPendingIntentnext = PendingIntent.getBroadcast(paramContext, 0, activebtnnext , 0);
rmViews.setOnClickPendingIntent(R.id.btnNext, configPendingIntentnext);
Intent activeprevbtn = new Intent(paramContext, MyWidget.class);
active.setAction(ACTION_WIDGET_CLICK_PREV);
PendingIntent configPendingIntentprev = PendingIntent.getBroadcast(paramContext, 0, activeprevbtn , 0);
rmViews.setOnClickPendingIntent(R.id.btnprev, configPendingIntentprev);
if(parmString.equals(ACTION_WIDGET_CLICK_NEXT))
{
//
}
if(parmString.equals(ACTION_WIDGET_CLICK_PREV))
{
//
}
return rview;
}
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