安卓小部件配置打开活动

Question

我想为一个应用程序创建一个小部件，并已经编写了widget provider和configuration类。小部件布局中只有一张图片，当我点击它时，希望能够打开MyActivity活动类。在配置布局中有一张红色图片，当我点击该图片时，小部件的图片会改变。问题是当我点击小部件时，它并没有打开MyActivity。

在哪里应该放置views.setOnClickPendingIntent？放到appWidgetProvider里吗？还是放到appWidgetConfiguration里？还是两者都要放？

问题2是：我是否需要将此代码放入MyActivity才能通过小部件点击打开它？：sendBroadcast(new Intent(Intent.ACTION_MAIN).addCategory(Intent.CATEGORY_HOME));

以下是我的代码：

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();
            }
        });   

    }

- Jemshit Iskenderov

Answer 1

1) 原来我需要将views.setOnClickPendingIntent(R.id.imageWidget, pendingIntent);代码分别放在appWidgetProvider和appWidgetConfiguration中，在appWidgetManager.updateAppWidget(mAppWidgetId, views);代码前。以下是我为点击监听器编写的代码：

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，而无需在目标活动中放置此代码：sendBroadcast(new Intent(Intent.ACTION_MAIN).addCategory(Intent.CATEGORY_HOME))。但是MyActivity.java 没有xml布局，因此我必须将此代码（放入Oncreate ）才能通过小部件单击打开它。第二个选项是，在上述打开该活动时，而不是将其放在目标活动中，编写intent.addCategory(Intent.CATEGORY_LAUNCHER) 。

- Jemshit Iskenderov