单击android小部件上的监听器按钮不起作用

时间:2015-11-14 19:16:46

标签: android android-widget onclicklistener

我正在研究一个Android项目,并创建了一个用于切换蓝牙的小部件(即,如果关闭则按下小部件打开蓝牙,反之亦然)。但问题是按钮的点击监听器不起作用,当我点击主屏幕上的小部件时,它什么都不做 我做了很多谷歌搜索,并尝试了几乎所有的解决方案,但不幸的是没有什么对我有用。我无法理解为什么我的代码无效。

这是项目的清单文件:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.gmail.redprince007.togglebluetooth" >

    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
    <uses-permission android:name="android.permission.BLUETOOTH"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <receiver android:name=".BluetoothToggle" >
            <intent-filter>
                <action                         android:name="android.appwidget.action.APPWIDGET_UPDATE" />
            </intent-filter>

            <meta-data
            android:name="android.appwidget.provider"
            android:resource="@xml/bluetooth_toggle_info" />
            </receiver>
    </application>

</manifest>

小部件布局的xml文件是:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="@dimen/widget_margin">

    <Button
    android:id="@+id/btnToggleBluetooth"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/bluetooth_on" />

</RelativeLayout>  

AppWidget-proviver.xml是:

<?xml version="1.0" encoding="utf-8"?>
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
android:initialKeyguardLayout="@layout/bluetooth_toggle"
android:initialLayout="@layout/bluetooth_toggle"
android:minHeight="40dp"
android:minWidth="40dp"
android:previewImage="@drawable/ic_bluetooth_icon"
android:updatePeriodMillis="0"
android:widgetCategory="home_screen|keyguard">

</appwidget-provider>  

和BluetoothOnOff.Java是:

public class BluetoothToggle extends AppWidgetProvider {
    private static final String TAG = "BluetoothToggle";
    private final String toggleBluetoothAction = "ToggleBluetooth";

    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
        Log.d(TAG, "onUpdate()");
        // There may be multiple widgets active, so update all of them
        final int N = appWidgetIds.length;
        for (int i = 0; i < N; i++) {
            Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
            PendingIntent pendingIntent = PendingIntent.getActivity(context, appWidgetIds[i], intent, 0);

            RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.bluetooth_toggle);
            remoteViews.setOnClickPendingIntent(R.id.btnToggleBluetooth, pendingIntent);

            updateAppWidget(context, appWidgetManager, appWidgetIds[i]);
        }
    }

    @Override
    public void onEnabled(Context context) {
        Log.d(TAG, "onEnabled()");
        // Enter relevant functionality for when the first widget is created
    }

    @Override
    public void onDisabled(Context context) {
        Log.d(TAG, "onDisabled()");
        // Enter relevant functionality for when the last widget is disabled
    }

    static void updateAppWidget(Context context, AppWidgetManager appWidgetManager, int appWidgetId) {
        Log.d(TAG, "updateAppWidget()");
        RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.bluetooth_toggle);

        // Instruct the widget manager to update the widget
        appWidgetManager.updateAppWidget(appWidgetId, views);
    }
}

提前感谢您的回复和帮助。我花了一天时间来解决这个问题,但我所有的努力都是徒劳的。

1 个答案:

答案 0 :(得分:1)

所以最后我在搜索了两天之后解决了这个问题。这是正确的代码:

Intent intent = new Intent(context, BluetoothToggle.class);
intent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
intent.putExtra(AppWi‌​dgetManager.EXTRA_APPWIDGET_IDS, appWidgetIds);
intent.putExtra(toggleBluetoothAction, toggleBluetoothAction);

这是我每次点击小部件时调用的onReceive()方法。

public void onReceive(Context context, Intent intent)
{
    Bundle bundle = intent.getExtras();

    if (bundle != null && bundle.getString(toggleBluetoothAction) != null)
    {
        // My Logic
    }
}

查看intent setActionputExtra,这些对我来说很有用,可以解决问题。我检查了很多网站,但大多数网站都没有包含这段代码来使小部件可以点击。他们所做的就是创建Intent,然后立即创建PendingIndent。我做了同样的事,但没有任何帮助我。

感谢。