Android Widget配置打开活动

Question

我想为一个应用程序创建一个小部件，并且已经编写了widget provider和configuration类。我只是在小部件布局中有一个图像，当它被点击时，我想要它打开MyActivity活动类。在配置布局上有一个红色图像，当我点击该图像时，小部件图像被更改。问题是当我单击小部件时，它不打开MyActivity。

我应该把views.setOnClickPendingIntent放在哪里?进入appWidgetProvider ?进入appWidgetConfiguration ?成两个吗?

问题2是:我是否必须将此代码放入MyActivity，以便用小部件单击打开它?: sendBroadcast(new Intent(Intent.ACTION_MAIN).addCategory(Intent.CATEGORY_HOME));

我有:

appwidget.xml

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@mipmap/ic_launcher"
        android:id="@+id/imageWidget" />
</LinearLayout>

appWidgetProvider.java

public class OffAppWidgetProvider extends AppWidgetProvider {
    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
        final int N = appWidgetIds.length;               
        for (int i=0; i<N; i++) {
            int appWidgetId = appWidgetIds[i];
            Intent intent = new Intent(context, MyActivity.class);
            PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);
            RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.appwidget);
            views.setOnClickPendingIntent(R.id.imageWidget, pendingIntent);
            appWidgetManager.updateAppWidget(appWidgetId, views);
        }
    }

appWidgetConfiguration.java

public class AppWidgetConfiguration extends Activity{
    private int mAppWidgetId;
    private ImageView image;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setResult(RESULT_CANCELED);
        setContentView(R.layout.activity_appwidget_configuration);
        Intent intent = getIntent();
        Bundle extras = intent.getExtras();
        if (extras != null) {
            mAppWidgetId = extras.getInt(
                AppWidgetManager.EXTRA_APPWIDGET_ID,
                AppWidgetManager.INVALID_APPWIDGET_ID);
        }
        image=(ImageView)findViewById(R.id.imageWidgetRed);
        image.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Context context= AppWidgetConfiguration.this;
                AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
                RemoteViews views = new RemoteViews(getPackageName(),R.layout.appwidget);
                views.setImageViewResource(R.id.imageWidget,R.mipmap.widgetred);                        
                appWidgetManager.updateAppWidget(mAppWidgetId, views);
                Intent resultValue = new Intent();
                resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, mAppWidgetId);
                setResult(RESULT_OK, resultValue);
                finish();
            }
        });   
    }

Answer 1

1)事实证明，我必须将views.setOnClickPendingIntent(R.id.imageWidget, pendingIntent);放在appWidgetProvider和appWidgetConfiguration行appWidgetManager.updateAppWidget(mAppWidgetId, views);之前。下面是我为click listener写的代码:

RemoteViews views = new RemoteViews(getPackageName(),R.layout.appwidget);
Intent intent = new Intent(context, MyActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addCategory(Intent.CATEGORY_LAUNCHER);
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
views.setOnClickPendingIntent(R.id.imageWidget, pendingIntent);
appWidgetManager.updateAppWidget(mAppWidgetId, views);

2)我可以打开具有xml布局的活动，而无需将此代码放在目标活动:sendBroadcast(new Intent(Intent.ACTION_MAIN).addCategory(Intent.CATEGORY_HOME))。但是MyActivity.java没有xml布局，我不得不把这个代码(进入Oncreate)，以便用小部件点击打开它。第二个选择是不把它放在目标活动中，在打开该活动时写intent.addCategory(Intent.CATEGORY_LAUNCHER);。