在AppWidget上更新TextView文本大小

我无法弄清楚这一点，我已经挣扎了好几天了，我已经厌倦了……

我正在使用配置活动中的微调器在AppWidget上更改TextView的文本大小，我无法正确更新它。 我第一次告诉它时它不会更新，但它会更新第二次和第三次以及之后的每次更新。

如果有人看一下我的代码，我真的很感激

非常感谢你

配置类：

public class WidgetConfig extends Activity implements OnItemSelectedListener{ Dialog myDialog; Context context = WidgetConfig.this; static EditText info; static Spinner spinner; String appwidget_textsize = "0"; private static final String[] paths = { "10", "12", "14", "16", "18", "20", "22", "24", "26", "28", "30", "32", "34", "36", "38", "40", "50", "60"}; private static final String PREFS_NAME = "com.harteg.NotesWidgetPro.Widget"; private static final String PREF_PREFIX_KEY = "prefix_"; private static final String TAG = "MyActivity"; int mAppWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID; float number; public WidgetConfig() { super(); } @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); Log.v(TAG, "onCreate() started"); setContentView(R.layout.widgetconfig); context = WidgetConfig.this; // back button = cancel setResult(RESULT_CANCELED); info = (EditText) findViewById(R.id.etwidgetconfig); findViewById(R.id.bwidgetconfig).setOnClickListener(mOnClickListener); findViewById(R.id.bwidgetconfig1).setOnClickListener(mOnClickListener); // 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 they gave us an intent without the widget id, just bail. if (mAppWidgetId == AppWidgetManager.INVALID_APPWIDGET_ID) { finish(); } info.setText(loadTitlePref(WidgetConfig.this, mAppWidgetId)); //------------ Text Size spinner --------------- spinner = (Spinner) findViewById(R.id.TxtSizeSP); ArrayAdapter adapter = new ArrayAdapter(WidgetConfig.this, android.R.layout.simple_spinner_item, paths); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); spinner.setAdapter(adapter); spinner.setOnItemSelectedListener(this); //-------------------------------------------------- } // onCreate finished public void onItemSelected(AdapterView parent, View v, int position, long id) { Log.v(TAG, "OnItemselected started"); switch (position) { case 0: info.setTextSize(10.0f); Log.v(TAG, "position 0 chosed"); appwidget_textsize = "10".toString(); break; ... } number = Float.valueOf(appwidget_textsize); } public void onNothingSelected(AdapterView arg0) { } View.OnClickListener mOnClickListener = new View.OnClickListener() { public void onClick(View v) { Log.v(TAG, "set remote view"); RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget); AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context); Log.v(TAG, "set txt size"); views.setFloat(R.id.tvConfigInput, "setTextSize", number); appWidgetManager.updateAppWidget(mAppWidgetId, views); Log.v(TAG, "over txt size"); // When the button is clicked, save the string in our prefs and // return that they clicked OK. String titlePrefix = info.getText().toString(); saveTitlePref(context, mAppWidgetId, titlePrefix); // Push widget update to surface with newly set prefix Widget.updateAppWidget(context, appWidgetManager, mAppWidgetId, titlePrefix, views); // Make sure we pass back the original appWidgetId Intent resultValue = new Intent(); resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, mAppWidgetId); setResult(RESULT_OK, resultValue); Log.v(TAG, "onClick done"); finish(); } }; // Write the prefix to the SharedPreferences object for this widget static void saveTitlePref(Context context, int mAppWidgetId, String text) { SharedPreferences.Editor editor = context.getSharedPreferences(PREFS_NAME, 0).edit(); editor.putString(PREF_PREFIX_KEY + mAppWidgetId, text); // Saves the values editor.commit(); } // Read the prefix from the SharedPreferences object for this widget. static String loadTitlePref(Context context, int mAppWidgetId) { SharedPreferences prefs = context.getSharedPreferences(PREFS_NAME, MODE_PRIVATE); String prefix = prefs.getString(PREF_PREFIX_KEY + mAppWidgetId, null); // If there is no preference saved, get the default from a resource if (prefix != null) { return prefix; } else { return context.getString(R.string.appwidget_prefix_default); } } static void deleteTitlePref(Context context, int mAppWidgetId) { } static void loadAllTitlePrefs(Context context, ArrayList mAppWidgetIds, ArrayList texts) { } } 

AppWidgetProvider类：

 public class Widget extends AppWidgetProvider { private static final String TAG = "MyActivity"; @Override public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) { Log.v(TAG, "onUpdate started"); // TODO Auto-generated method stub //super.onUpdate(context, appWidgetManager, appWidgetIds); final int N = appWidgetIds.length; RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget); for (int i=0; i<N; i++){ int mAppWidgetId = appWidgetIds[i]; String titlePrefix = WidgetConfig.loadTitlePref(context, mAppWidgetId); updateAppWidget(context, appWidgetManager, mAppWidgetId, titlePrefix, views); } } @Override public void onDeleted(Context context, int[] appWidgetIds) { final int N = appWidgetIds.length; for (int i=0; i<N; i++) { WidgetConfig.deleteTitlePref(context, appWidgetIds[i]); } } ... static void updateAppWidget(Context context, AppWidgetManager appWidgetManager, int mAppWidgetId, String titlePrefix, RemoteViews views) { Log.v(TAG, "updateAppWidget started"); // Getting the string this way allows the string to be localized. The format // string is filled in using java.util.Formatter-style format strings. CharSequence text = context.getString(R.string.appwidget_text_format, WidgetConfig.loadTitlePref(context, mAppWidgetId)); appWidgetManager = AppWidgetManager.getInstance(context); ... views = new RemoteViews(context.getPackageName(), R.layout.widget); views.setTextViewText(R.id.tvConfigInput, text); // Tell the AppWidgetManager to perform an update on the current app widget Log.v(TAG, "Bottom update started"); appWidgetManager.updateAppWidget(mAppWidgetId, views); } } 

strings.xml中

    %1$s ...  

Answer 1

所以我在尝试了一百万种不同的东西后终于开始工作了。 我最终通过sharedpreferences传递了一个带有值的字符串，就像我将文本添加到窗口小部件一样，只需设置views.setFloat(R.id.TextView, "setTextSize", Float.valueOf(SizeString)); 在小部件提供商中它自己。

Answer 2

首次启动配置活动时，您必须自己广播ACTION_APPWIDGET_UPDATE 。

Appwidgets文档说：

创建App Widget时不会调用onUpdate（）方法（系统在启动配置Activity时不会发送ACTION_APPWIDGET_UPDATE广播）。 首次创建App Widget时，配置Activity负责从AppWidgetManager请求更新。 但是，将为后续更新调用onUpdate（） – 它仅在第一次被跳过。

更新：

尝试在Config活动的finish（）行上方添加此代码。

 AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(this); appWidgetManager.updateAppWidget( new ComponentName(this.getPackageName(), Widget.class.getName()), views);