AndroidWidget实践 --- EverydayTips开发(4)
接下来就是刷新了.刷新操作的话目测有几种方式(目测 --!)
1.在widget创建线程刷新
2.使用timer刷新(其实也是线程吧?)
3.widget连接Service 在Service创建线程刷新
4.widget连接Service 在Service中使用AlarmManager刷新
Thread比较简单,修改widget代码如下
package com.su.tipeveryday;
import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.provider.ContactsContract.CommonDataKinds.Note;
import android.util.Log;
import android.widget.RemoteViews;
import android.widget.TextView;
import android.widget.Toast;
public class TipEveryDayWidget extends AppWidgetProvider {
private Context mContext;
@Override
public void onDeleted(Context context, int[] appWidgetIds) {
// TODO Auto-generated method stub
super.onDeleted(context, appWidgetIds);
}
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager,
int[] appWidgetIds) {// widget更新执行的方法
// TODO Auto-generated method stub
super.onUpdate(context, appWidgetManager, appWidgetIds);
// final int N = appWidgetIds.length;//实现单个widget更新的方法,暂时不用
// Log.d("app", "onUpdate--->Ids===" + String.valueOf(N));
// for (int i = 0; i < N; i++) {// 如果有很多同类widget是需要遍历的(他们的id是不同的)
// int appWidgetId = appWidgetIds[i];
// updateAppWidget(context, appWidgetManager, appWidgetId);//
// 更新widget的方法
// }
mContext = context;
updateAppWidget(context, appWidgetManager, appWidgetIds);// 更新widget的方法
Thread myThread = new Thread() {//开启线程
public void run() {
while (true) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
mContext.sendBroadcast(new Intent("com.su.ontiprefresh"));// 通知刷新,其实相当于中午说的那个click,同样要在manifest注册
Log.i("SSSSSSS", "Time");
}
};
};
myThread.start();
}
private void updateAppWidget(Context context,
AppWidgetManager appWidgetManager, int[] appWidgetIds) {
// 1.1,增加跳转用activity相关 intent
RemoteViews remoteViews = new RemoteViews(context.getPackageName(),
R.layout.widget_layout);
String tip = Tips.getTips();// 从Tips.java 获取警句
remoteViews.setTextViewText(R.id.textViewWidget, tip);// 设置
Intent intent = new Intent(context, TipEveryDayActivity.class);// 一下三句就可以启动Activity了
intent.putExtra("TIP", tip);
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0,
intent, PendingIntent.FLAG_CANCEL_CURRENT);
/**
* 传值说明
* ①若该Intent带有数据，则需要将最后一个参数的值设为：FLAG_CANCEL_CURRENT eg:
* PendingIntent Pfullintent=PendingIntent.getActivity(this, 0,
* fullIntent,PendingIntent.FLAG_CANCEL_CURRENT);
* ②若该Intent不带数据，则最后一个参数设为0 eg: PendingIntent
* Pfullintent=PendingIntent.getActivity(this, 0, fullIntent, 0);
*/
remoteViews.setOnClickPendingIntent(R.id.textViewWidget, pendingIntent);
Intent intent2 = new Intent("com.su.ontipclick");// 这三句就可以注册按钮事件了,确实比较麻烦
PendingIntent pendingIntent2 = PendingIntent.getBroadcast(context, 0,
intent2, 0);
remoteViews.setOnClickPendingIntent(R.id.buttonChange, pendingIntent2);
appWidgetManager.updateAppWidget(appWidgetIds, remoteViews);// 把widget的内容更新
}
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals("com.su.ontipclick")) {
Toast.makeText(context, "通过点击刷新", Toast.LENGTH_LONG).show();// 点击按钮会触发的事件
refreshWidget(context);
}
if (intent.getAction().equals("com.su.ontiprefresh")) {
refreshWidget(context);
}
super.onReceive(context, intent);
}
private void refreshWidget(Context context) {//抽取了刷新widget的方法
RemoteViews remoteViews = new RemoteViews(context.getPackageName(),
R.layout.widget_layout);// 只能通过远程对象来设置appwidget中的控件状态
String tip = Tips.getTips();// 从Tips.java 获取警句
remoteViews.setTextViewText(R.id.textViewWidget, tip);
Intent intent = new Intent(context, TipEveryDayActivity.class);// 重新注册一边开启Activity的事件,因为要获取刷新后的警句
intent.putExtra("TIP", tip);
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0,
intent, PendingIntent.FLAG_CANCEL_CURRENT);
remoteViews.setOnClickPendingIntent(R.id.textViewWidget, pendingIntent);
AppWidgetManager appWidgetManager = AppWidgetManager
.getInstance(context);// 获得appwidget管理实例，用于管理appwidget以便进行更新操作
ComponentName componentName = new ComponentName(context,
TipEveryDayWidget.class);// 相当于获得所有本程序创建的appwidget
appWidgetManager.updateAppWidget(componentName, remoteViews);
}
}
不要忘了注册
<receiver android:name=".TipEveryDayWidget"
android:label="AAAAAAAATip">
<intent-filter >
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
<action android:name="com.su.ontipclick"></action><!-- 单击事件 -->
<action android:name="com.su.ontiprefresh"></action><!-- 刷新事件 -->
</intent-filter>
<meta-data
android:name="android.appwidget.provider"
android:resource="@xml/widget_config" /><!-- 这个是widget的配置文件,出来这个之外其他的不用管直接copy -->
</receiver>
这样就可以在桌面每一秒刷换一次警句了
然后我们看看第四种方法(第三种和第一种差不多,就不赘述)
我们需要Service
package com.su.tipeveryday;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.app.Service;
import android.appwidget.AppWidgetManager;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;
import android.widget.RemoteViews;
public class TipService extends Service {
private static final String TAG = "TipService";
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
}
@Override
public void onDestroy() {
super.onDestroy();
}
@Override
public void onRebind(Intent intent) {
super.onRebind(intent);
}
@Override
public void onStart(Intent intent, int startId) {
super.onStart(intent, startId);
Log.i(TAG, "start service Time update");
TipEveryDayWidget.refreshWidget(this);
// 设置下次执行时间,每秒刷新一次
long now = System.currentTimeMillis();
long updateMilis = 2000;
PendingIntent pendingIntent = PendingIntent.getService(this, 0, intent,
0);
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, now + updateMilis,
pendingIntent);//now + updateMilis其实是一个死循环
stopSelf();
}
@Override
public boolean onUnbind(Intent intent) {
return super.onUnbind(intent);
}
}
然后我们把refreshWidget做了修改 改成public static了,这是不是很喜欢的 感觉有点耦合..同时这里我也罢以前的烂代码精简了一下XD
package com.su.tipeveryday;
import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.provider.ContactsContract.CommonDataKinds.Note;
import android.util.Log;
import android.widget.RemoteViews;
import android.widget.TextView;
import android.widget.Toast;
public class TipEveryDayWidget extends AppWidgetProvider {
@Override
public void onDeleted(Context context, int[] appWidgetIds) {
// TODO Auto-generated method stub
super.onDeleted(context, appWidgetIds);
}
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager,
int[] appWidgetIds) {// widget更新执行的方法
// TODO Auto-generated method stub
super.onUpdate(context, appWidgetManager, appWidgetIds);
refreshWidget(context);// 更新widget的方法
context.startService(new Intent(context, TipService.class));
}
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals("com.su.ontipclick")) {
Toast.makeText(context, "通过点击刷新", Toast.LENGTH_LONG).show();// 点击按钮会触发的事件
refreshWidget(context);
}
if (intent.getAction().equals("com.su.ontiprefresh")) {
refreshWidget(context);
}
super.onReceive(context, intent);
}
public static void refreshWidget(Context context) {// 抽取了刷新widget的方法
RemoteViews remoteViews = new RemoteViews(context.getPackageName(),
R.layout.widget_layout);// 只能通过远程对象来设置appwidget中的控件状态
String tip = Tips.getTips();// 从Tips.java 获取警句
remoteViews.setTextViewText(R.id.textViewWidget, tip);
Intent intent = new Intent(context, TipEveryDayActivity.class);// 重新注册一边开启Activity的事件,因为要获取刷新后的警句
intent.putExtra("TIP", tip);
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0,
intent, PendingIntent.FLAG_CANCEL_CURRENT);
remoteViews.setOnClickPendingIntent(R.id.textViewWidget, pendingIntent);
/**
* 传值说明 ①若该Intent带有数据，则需要将最后一个参数的值设为：FLAG_CANCEL_CURRENT eg:
* PendingIntent Pfullintent=PendingIntent.getActivity(this, 0,
* fullIntent,PendingIntent.FLAG_CANCEL_CURRENT);
* ②若该Intent不带数据，则最后一个参数设为0 eg: PendingIntent
* Pfullintent=PendingIntent.getActivity(this, 0, fullIntent, 0);
*/
Intent intent2 = new Intent("com.su.ontipclick");// 这三句就可以注册按钮事件了,确实比较麻烦
PendingIntent pendingIntent2 = PendingIntent.getBroadcast(context, 0,
intent2, 0);
remoteViews.setOnClickPendingIntent(R.id.buttonChange, pendingIntent2);
AppWidgetManager appWidgetManager = AppWidgetManager
.getInstance(context);// 获得appwidget管理实例，用于管理appwidget以便进行更新操作
ComponentName componentName = new ComponentName(context,
TipEveryDayWidget.class);// 相当于获得所有本程序创建的appwidget
appWidgetManager.updateAppWidget(componentName, remoteViews);
}
}
效果和以前一样只不过是2s刷新