AndroidWidget实践 --- EverydayTips开发(3)

这次我们实现点击widget 弹出Activity 并把当前字串传送给Activity

其实很简单就是intent的传值

但是由于是第一次做,还是遇到了很多小问题,查了不少资料总算搞定

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); // 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 // } updateAppWidget(context, appWidgetManager, appWidgetIds);// 更新widget的方法 } private void updateAppWidget(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) { // 1.1,增加跳转用activity相关 intent RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget_layout); String tip = Tips.getTips();// 从Tips.java 获取警句 views.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); */ views.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); views.setOnClickPendingIntent(R.id.buttonChange, pendingIntent2); appWidgetManager.updateAppWidget(appWidgetIds, views);// 把widget的内容更新 } public void onReceive(Context context, Intent intent) { if (intent.getAction().equals("com.su.ontipclick")) { Toast.makeText(context, "OK!!!!!", Toast.LENGTH_LONG).show();// 点击按钮会触发的事件 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); 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); } super.onReceive(context, intent); } }
具体自己看注释吧

下面是Activity获取值 这个没什么说的

package com.su.tipeveryday; import android.app.Activity; import android.appwidget.AppWidgetManager; import android.content.Intent; import android.os.Bundle; import android.util.Log; import android.widget.EditText; public class TipEveryDayActivity extends Activity { int mAppWidgetId; private EditText editText; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.main); Log.i("myLog"," on WidgetConf ... "); editText = (EditText)findViewById(R.id.editTextTip); setResult(RESULT_CANCELED); // Find the widget id from the intent. Intent intent = getIntent(); String tip = intent.getStringExtra("TIP");//获取传来的值 editText.setText(tip); Bundle extras = intent.getExtras(); if (extras != null) { mAppWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID); Log.i("TTTTT", mAppWidgetId+"");//这个返回的屏幕上的widgetID,没增加一个会加一 我的模拟器是19,应该是有保留ID? } Intent resultValue = new Intent(); resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, mAppWidgetId); //感觉这里的mAppWidgetId 应该是和控制知道widget有关稍后研究 setResult(RESULT_OK, resultValue); } }
上代码http://dl.dbank.com/s0bnzfb4vk