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我正在为记事本制作一个小部件，我可以从数据库中获取笔记的标题，但现在唯一的问题是我想更改小部件的布局，即布局中的文本。我的配置活动中有一个列表视图当我单击一个项目时，该项目中的文本应该成为 Widget 中 textView 的文本。现在我能够获取文本数据，但我无法设置它。这是小部件提供程序的代码：-

public void onUpdate(Context context, AppWidgetManager appWidgetManager,
        int[] appWidgetIds) {
    // TODO Auto-generated method stub
    super.onUpdate(context, appWidgetManager, appWidgetIds);
    for (int i = 0; i < appWidgetIds.length; i++) {
        int appWidgetId = appWidgetIds[i];

        Intent intent = new Intent(context, NotesList.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(context, 0,
                intent, 0);

        RemoteViews views = new RemoteViews(context.getPackageName(),
                R.layout.widget_layout);
        views.setOnClickPendingIntent(R.id.textViewWidget, pendingIntent);

        appWidgetManager.updateAppWidget(appWidgetId, views);
    }
}

对于配置小部件：-

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Intent intent = getIntent();
    if (intent.getData() == null) {
        intent.setData(Notes.CONTENT_URI);
    }

    Uri notesUri = getIntent().getData();
    Cursor managedCursor = getContentResolver().query(notesUri,
            new String[] { Notes.TAGS, Notes.TITLE }, null, null, null);

    managedCursor.moveToFirst();
    do{
        Log.d("name", managedCursor.getString(1));
        name = managedCursor.getString(1);
        array.add(name);
        managedCursor.moveToNext();
    }while(!managedCursor.isLast());
    name = managedCursor.getString(1);
    array.add(name);

    adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,array);
    setListAdapter(adapter);

    setResult(RESULT_CANCELED);
    Bundle extras = getIntent().getExtras();

    if(extras != null){
        widgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID,AppWidgetManager.INVALID_APPWIDGET_ID);
    }

    appWidgetManager = AppWidgetManager.getInstance(this);  
}

protected void onListItemClick(ListView l, View v, int position, long id) {
    super.onListItemClick(l, v, position, id);
    Uri notesUri = getIntent().getData();
    Cursor managedCursor = getContentResolver().query(notesUri,
            null, null, null, null);

    managedCursor.moveToFirst();
    managedCursor.moveToPosition(position);
    Log.d("Note", managedCursor.getString(9));
    String s = managedCursor.getString(9); 
    //s is the text I want to set & here since I need to change a different layout so I used layout inflator
    LayoutInflater inflate = getLayoutInflater();
    LinearLayout v1 = (LinearLayout) inflate.inflate(R.layout.widget_layout, null);
    text = (TextView)v1.findViewById(R.id.textViewWidget);
    //These are the changed needed to be done
            text.setBackgroundColor(Color.YELLOW);
    text.setText(s);
    //Toast.makeText(this, text.getText()+"", Toast.LENGTH_SHORT).show();   
    views = new RemoteViews(this.getPackageName(),
            R.layout.widget_layout);//This remote view is not updated

    Intent intent1 = new Intent(this, NotesList.class);
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
            intent1, 0);
    views.setOnClickPendingIntent(R.id.textViewWidget, pendingIntent);

    appWidgetManager.updateAppWidget(widgetId, views);

    Intent resultValue = new Intent();
    resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, widgetId);
    setResult(RESULT_OK,resultValue);
    finish();
}

配置活动的 XML 文件：-

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<ListView
    android:id="@android:id/list"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:fastScrollEnabled="true" >
</ListView>

</LinearLayout>

对于小部件：-

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">

<TextView
    android:id="@+id/textViewWidget"
    android:layout_width="96dp"
    android:layout_height="96dp"
    android:background="@android:color/white"
    android:text="Large Text"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:textColor="@android:color/black" />

</LinearLayout>

有人可以看看我的代码并提供帮助吗

4

1 回答 1

1

首先我找不到你的AppWidgetProvider课。

其次，在小部件中，您无法使用findViewById().In 获取视图。在小部件中，您可以获得TextView如下视图：

您必须像这样获取widgetin的布局RemoteViews，它也在onUpdate()of 中AppWidgetProvider：

 RemoteViews rvs = new RemoteViews(context.getPackageName(), R.layout.main);

现在在小部件中设置文本TextView：

rvs.setTextViewText(R.id.textViewWidget, "we updated! yay!");

如果您有任何进一步的疑问，请查看这个关于小部件的非常简单有效的教程。

于 2013-02-15T11:02:36.307 回答