本文实例讲述了Android编程之桌面小部件AppWidgetProvider用法。分享给大家供大家参考,具体如下:public class ExampleAppWidgetConfigure extends Activity { sta
本文实例讲述了Android编程之桌面小部件AppWidgetProvider用法。分享给大家供大家参考,具体如下:
public class ExampleAppWidgetConfigure extends Activity { static final String TAG = "ExampleAppWidgetConfigure"; // 保存的文件名 private static final String PREFS_NAME = "com.example.android.apis.appwidget.ExampleAppWidgetProvider"; // 保存的字段KEY private static final String PREF_PREFIX_KEY = "prefix_"; // 小部件 对应ID int mAppWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID; // 输入框 EditText mAppWidgetPrefix; public ExampleAppWidgetConfigure() { super(); } @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); setResult(RESULT_CANCELED); // 设置布局 setContentView(R.layout.appwidget_configure); mAppWidgetPrefix = (EditText) findViewById(R.id.appwidget_prefix); // 设置监听 findViewById(R.id.save_button).setOnClickListener(mOnClickListener); // 获取intent传递过来的数据 Intent intent = getIntent(); Bundle extras = intent.getExtras(); if (extras != null) { mAppWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID); } if (mAppWidgetId == AppWidgetManager.INVALID_APPWIDGET_ID) { finish(); } mAppWidgetPrefix.setText(loadTitlePref(ExampleAppWidgetConfigure.this, mAppWidgetId)); } View.OnClickListener mOnClickListener = new View.OnClickListener() { public void onClick(View v) { final Context context = ExampleAppWidgetConfigure.this; String titlePrefix = mAppWidgetPrefix.getText().toString(); //保存到SharedPreferences文件 saveTitlePref(context, mAppWidgetId, titlePrefix); AppWidgetManager appWidgetManager = AppWidgetManager .getInstance(context); //更新小部件 ExampleAppWidgetProvider.updateAppWidget(context, appWidgetManager, mAppWidgetId, titlePrefix); Intent resultValue = new Intent(); resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, mAppWidgetId); setResult(RESULT_OK, resultValue); finish(); } }; 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.commit(); } static String loadTitlePref(Context context, int appWidgetId) { SharedPreferences prefs = context.getSharedPreferences(PREFS_NAME, 0); String prefix = prefs.getString(PREF_PREFIX_KEY + appWidgetId, null); if (prefix != null) { return prefix; } else { return context.getString(R.string.appwidget_prefix_default); } } static void deleteTitlePref(Context context, int appWidgetId) { } static void loadAllTitlePrefs(Context context, ArrayList<Integer> appWidgetIds, ArrayList<String> texts) { }}
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本文标题: Android编程之桌面小部件AppWidgetProvider用法示例
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