我正在为我的笔记应用程序开发小部件。
我要归档的内容与colorNote widget类似:
答案 0 :(得分:12)
我认为 ColorNote 正在使用Widget Configuration Activity。 你可以在第一个链接(官方链接)上找到一个有用的例子,或者(为什么不)也找到there。
实现"对话框"样式,你必须像下面这样设置你的小部件配置活动:
<activity
...
android:theme="@android:style/Theme.Dialog"
android:excludeFromRecents="true" />
上面的示例来自this answer。
如果您想了解有关小部件设计的更多信息,请查看there。
示例强>
1)创建 widget_info 并将其放在res / xml文件夹中:
<?xml version="1.0" encoding="utf-8"?>
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
android:configure="com.mycompany.app.widgettest.WidgetConfigureActivity"
android:initialKeyguardLayout="@layout/widget"
android:initialLayout="@layout/widget"
android:minHeight="40dp"
android:minWidth="40dp"
android:resizeMode="horizontal|vertical"
android:updatePeriodMillis="86400000"
android:widgetCategory="home_screen">
</appwidget-provider>
2)创建小部件布局(我选择了最简单的布局):
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#09C"
android:padding="@dimen/widget_margin">
<TextView
android:id="@+id/appwidget_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:layout_margin="8dp"
android:background="#09C"
android:contentDescription="@string/appwidget_text"
android:text="@string/appwidget_text"
android:textColor="#ffffff"
android:textSize="24sp"
android:textStyle="bold|italic" />
</RelativeLayout>
随意给自己的风格。
3)创建 widget_configure 活动布局:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="16dp">
<TextView
android:id="@+id/text_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:text="@string/configure" />
<EditText
android:id="@+id/appwidget_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="text"
android:layout_below="@+id/text_view"/>
<ListView
android:id="@+id/list"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:layout_below="@+id/appwidget_text"
android:layout_above="@+id/add_button">
</ListView>
<Button
android:id="@+id/add_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="@string/add_widget"
android:layout_alignParentBottom="true" />
</RelativeLayout>
此外,您可以自定义并编辑活动的布局;在上面的例子中,我添加了一个编辑文本,它将创建一个&#34; new&#34; note(但不保存在数据库中)和包含虚拟内容的列表。由您来填充您的列表,当然是从您的数据库中获取。
4)将小部件配置活动和小部件提供程序添加到您的清单中(在应用程序标记内):
<receiver android:name=".AppWidget">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>
<meta-data
android:name="android.appwidget.provider"
android:resource="@xml/widget_info" />
</receiver>
<activity
android:name=".WidgetConfigureActivity"
android:theme="@android:style/Theme.Dialog"
android:excludeFromRecents="true">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_CONFIGURE" />
</intent-filter>
</activity>
5)创建AppWidget类,它将扩展 AppWidgetProvider (注意在下面的类中实现和管理app widget配置,WidgetConfigureActivity)[我还没有在这个类中添加任何特殊内容]:
import android.appwidget.AppWidgetProvider;
import android.appwidget.AppWidgetManager;
import android.content.Context;
import android.widget.RemoteViews;
/**
* Implementation of App Widget functionality.
*/
public class AppWidget extends AppWidgetProvider {
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
// There may be multiple widgets active, so update all of them
for (int appWidgetId : appWidgetIds) {
updateAppWidget(context, appWidgetManager, appWidgetId);
}
}
@Override
public void onDeleted(Context context, int[] appWidgetIds) {
// When the user deletes the widget, delete the preference associated with it.
for (int appWidgetId : appWidgetIds) {
WidgetConfigureActivity.deleteTitlePref(context, appWidgetId);
}
}
@Override
public void onEnabled(Context context) {
// Enter relevant functionality for when the first widget is created
}
@Override
public void onDisabled(Context context) {
// Enter relevant functionality for when the last widget is disabled
}
static void updateAppWidget(Context context, AppWidgetManager appWidgetManager,
int appWidgetId) {
CharSequence widgetText = WidgetConfigureActivity.loadTitlePref(context, appWidgetId);
// Construct the RemoteViews object
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget);
views.setTextViewText(R.id.appwidget_text, widgetText);
// Instruct the widget manager to update the widget
appWidgetManager.updateAppWidget(appWidgetId, views);
}
}
6)最后,这是 WidgetConfigureActivity :
import android.app.Activity;
import android.appwidget.AppWidgetManager;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;
/**
* The configuration screen for the {@link AppWidget} com.bepatient.app.widgettest.AppWidget.
*/
public class WidgetConfigureActivity extends Activity {
int mAppWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;
EditText mAppWidgetText;
private static final String PREFS_NAME = "AppWidget";
private static final String PREF_PREFIX_KEY = "appwidget";
public WidgetConfigureActivity() {
super();
}
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
// Set the result to CANCELED. This will cause the widget host to cancel
// out of the widget placement if the user presses the back button.
setResult(RESULT_CANCELED);
setContentView(R.layout.widget_configure);
// Set layout size of activity
getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
mAppWidgetText = (EditText) findViewById(R.id.appwidget_text);
findViewById(R.id.add_button).setOnClickListener(mOnClickListener);
final ListView listView = (ListView) findViewById(R.id.list);
// Defined array values to show in ListView
String[] values = new String[] { "Don't forget the milk!",
"Do not forget to go get the mother-in-law",
"Go to the laundry",
"Marise number 0123456789"
};
ArrayAdapter<String> adapter = new ArrayAdapter<>(this,
android.R.layout.simple_list_item_1, android.R.id.text1, values);
listView.setAdapter(adapter);
// ListView Item Click Listener
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// Take ListView clicked item value
String widgetText = (String) listView.getItemAtPosition(position);
createWidget(getApplicationContext(), widgetText);
}
});
// Find the widget id from the intent.
Intent intent = getIntent();
Bundle extras = intent.getExtras();
if (extras != null) {
mAppWidgetId = extras.getInt(
AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
}
// If this activity was started with an intent without an app widget ID, finish with an error.
if (mAppWidgetId == AppWidgetManager.INVALID_APPWIDGET_ID) {
finish();
return;
}
mAppWidgetText.setText(loadTitlePref(WidgetConfigureActivity.this, mAppWidgetId));
}
View.OnClickListener mOnClickListener = new View.OnClickListener() {
public void onClick(View v) {
final Context context = WidgetConfigureActivity.this;
// When the button is clicked, get text
String widgetText = mAppWidgetText.getText().toString();
createWidget(context, widgetText);
}
};
private void createWidget(Context context, String widgetText) {
// Store the string locally
saveTitlePref(context, mAppWidgetId, widgetText);
// It is the responsibility of the configuration activity to update the app widget
AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
AppWidget.updateAppWidget(context, appWidgetManager, mAppWidgetId);
// Make sure we pass back the original appWidgetId
Intent resultValue = new Intent();
resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, mAppWidgetId);
setResult(RESULT_OK, resultValue);
finish();
}
// Write the prefix to the SharedPreferences object for this widget
static void saveTitlePref(Context context, int appWidgetId, String text) {
SharedPreferences.Editor prefs = context.getSharedPreferences(PREFS_NAME, 0).edit();
prefs.putString(PREF_PREFIX_KEY + appWidgetId, text);
prefs.apply();
}
// Read the prefix from the SharedPreferences object for this widget.
// If there is no preference saved, get the default from a resource
static String loadTitlePref(Context context, int appWidgetId) {
SharedPreferences prefs = context.getSharedPreferences(PREFS_NAME, 0);
String titleValue = prefs.getString(PREF_PREFIX_KEY + appWidgetId, null);
if (titleValue != null) {
return titleValue;
} else {
return context.getString(R.string.appwidget_text);
}
}
static void deleteTitlePref(Context context, int appWidgetId) {
SharedPreferences.Editor prefs = context.getSharedPreferences(PREFS_NAME, 0).edit();
prefs.remove(PREF_PREFIX_KEY + appWidgetId);
prefs.apply();
}
}
在此课程中,您必须管理并填充应用数据库中保存的所有笔记。当您单击按钮或项目时, createWidget 方法将为您完成工作。
注意以下几行:
// Set layout size of activity
getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
这必须在 setContentView()方法之后调用,否则您的活动会变得微不足道。如果您运行此示例,您会发现配置活动的样式很简单,因此您必须根据应用UI(如果需要)创建自己的样式。
答案 1 :(得分:0)
您可以为窗口小部件开发设置功能,该功能将在实例化窗口小部件或单击窗口小部件时显示。要为您的小部件提供选项功能,您必须在应用中使用用户界面(包含供用户选择的选项的UI)和包含处理设置选择行为的活动来创建设置活动。
用户每次保存选择时,都可以将所选选项应用于小部件实例。有关示例的详细说明,请参见http://www.zoftino.com/android-widget-example