当我单击小部件中的按钮时，会出现一个 Toast。但是当我使用配置活动设置按钮的标题然后单击按钮时，吐司不会出现。为什么？
public class MyWidget extends AppWidgetProvider {
public static String ACTION_WIDGET_CONFIGURE = "ConfigureWidget";
public static String ACTION_WIDGET_RECEIVER = "ActionReceiverWidget";
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.widget_layout);
Intent intent = new Intent(context, MyWidget.class);
intent.setAction(ACTION_WIDGET_RECEIVER);
PendingIntent actionPendingIntent = PendingIntent.getBroadcast(context, 0, intent, 0);
remoteViews.setOnClickPendingIntent(R.id.btn_widget, actionPendingIntent);
appWidgetManager.updateAppWidget(appWidgetIds, remoteViews); //update our widget
}
@Override
public void onDeleted(Context context, int[] appWidgetIds) {
super.onDeleted(context, appWidgetIds);
}
@Override
public void onDisabled(Context context) {
super.onDisabled(context);
}
@Override
public void onEnabled(Context context) {
super.onEnabled(context);
}
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(ACTION_WIDGET_RECEIVER))
{
Toast.makeText(context, "You have just clicked the button!", Toast.LENGTH_LONG).show();
}
super.onReceive(context, intent);
}
应用小部件提供者 xml：
<?xml version="1.0" encoding="utf-8"?>
<appwidget-provider
xmlns:android="http://schemas.android.com/apk/res/android"
android:initialLayout="@layout/widget_layout"
android:minHeight="72dp"
android:minWidth="72dp"
android:configure="com.bfarago.tutorials.widget.ConfigActivity"
>
</appwidget-provider>
显现：
<activity
android:name=".ConfigActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_CONFIGURE" />
</intent-filter>
</activity>
<receiver android:name="MyWidget" >
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
<action android:name="com.bfarago.tutorials.widget.MyWidget.ACTION_WIDGET_RECEIVER"/>
</intent-filter>
<meta-data android:name="android.appwidget.provider" android:resource="@xml/widget_info"/>
</receiver>
配置活动：
public class ConfigActivity extends Activity {
Button btn;
EditText et;
Context c;
AppWidgetManager awm;
int awID;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.config);
btn = (Button)findViewById(R.id.btn);
et = (EditText)findViewById(R.id.et);
c = ConfigActivity.this;
//Getting info about the widget that launched this Activity
Intent i = getIntent();
Bundle extras = i.getExtras();
if (extras != null)
{
awID = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
}
else
{
finish();
}
awm = AppWidgetManager.getInstance(c);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String newcaption = et.getText().toString();
RemoteViews views = new RemoteViews(c.getPackageName(), R.layout.widget_layout);
views.setTextViewText(R.id.btn_widget, newcaption);
views.setTextColor(R.id.btn_widget, Color.RED);
awm.updateAppWidget(awID, views);
Intent result = new Intent();
result.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, awID);
setResult(RESULT_OK, result);
finish();
}
});
}
}
如果我 android:configure="com.bfarago.tutorials.widget.ConfigActivity"从 appwidgetprovider xml 中删除该行，我会看到 Toast。