小编vid*_*dha的帖子

在Nougat中,此功能无效.

String path = getRealPathFromURI(this, getIntent().getParcelableExtra(Intent.EXTRA_STREAM));

public String getRealPathFromURI(Context context, Uri contentUri) {
    Cursor cursor = null;
    try {
        String[] proj = {MediaStore.Images.Media.DATA};
        cursor = context.getContentResolver().query(contentUri, proj, null, null, null);
        if (cursor == null) return contentUri.getPath();
        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        return cursor.getString(column_index);
    } finally {
        if (cursor != null) {
            cursor.close();
        }
    }
}

崩溃日志:

java.lang.RuntimeException: Unable to start activity ComponentInfo{class path}: java.lang.IllegalArgumentException: column '_data' does not exist
   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2659)
   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2724)
   at android.app.ActivityThread.-wrap12(ActivityThread.java)
   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1473)
   at android.os.Handler.dispatchMessage(Handler.java:102)
   at …

有时我的应用程序会遇到这种异常:

Fatal Exception: android.app.RemoteServiceException: Bad notification posted from package com.packagename: Couldn't expand RemoteViews for: StatusBarNotification(pkg=com.packagename user=UserHandle{0} id=136094146 tag=null score=0: Notification(pri=0 contentView=com.packagename/0x109007e vibrate=default sound=default defaults=0xffffffff flags=0x11 kind=[null]))
   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
   at android.os.Handler.dispatchMessage(Handler.java:102)
   at android.os.Looper.loop(Looper.java:149)
   at android.app.ActivityThread.main(ActivityThread.java:5257)
   at java.lang.reflect.Method.invokeNative(Method.java)
   at java.lang.reflect.Method.invoke(Method.java:515)
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:609)
   at dalvik.system.NativeStart.main(NativeStart.java)

代码创建通知:

PendingIntent intent = PendingIntent.getActivities(this, id,
        notificationIntents, PendingIntent.FLAG_UPDATE_CURRENT);


int color = ContextCompat.getColor(this, R.color.notif_background);

NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
        .setContentText(description)
        .setSmallIcon(getSmallIcon())
        .setLargeIcon(getLargeIcon())
        .setColor(color)
        .setDefaults(NotificationCompat.DEFAULT_ALL)
        .setAutoCancel(true)
        .setStyle(new NotificationCompat.BigPictureStyle().bigLargeIcon(largeIcon))
        .setContentIntent(intent);

if (title != null) { …

我引用了示例应用程序代码（https://github.com/googlesamples/android-DirectShare），然后将ChooserTargetService添加到了我的应用程序中

public class ShareChooserTargetService extends ChooserTargetService {

@Override
public List<ChooserTarget> onGetChooserTargets(ComponentName targetActivityName,
                                               IntentFilter matchedFilter) {

    Log.d("ShareChooserTargetService", "onGetChooserTargets: ");

    ComponentName componentName = new ComponentName(getPackageName(),
            ShareActivity.class.getCanonicalName());

    ArrayList<ChooserTarget> targets = new ArrayList<>();
    for (User user : Users.getAll()) {
        Bundle extras = new Bundle();
        extras.putInt("user_id", user.id);
        targets.add(new ChooserTarget(
                user.name,
                Icon.createWithResource(this, R.mipmap.ic_user),
                componentName,
                extras));
    }
    return targets;
}

在清单文件中，我添加了以下几行：

<activity
        android:name=".ui.ShareActivity"
        android:label="@string/app_name">
        <intent-filter>
            <action android:name="android.intent.action.SEND" />
            <action android:name="android.intent.action.SEND_MULTIPLE" />
            <category android:name="android.intent.category.DEFAULT" />
            <data android:mimeType="*/*" />
        </intent-filter>
        <meta-data
            android:name="android.service.chooser.chooser_target_service"
            android:value=".ShareChooserTargetService" />
    </activity>

<service
        android:name=".ShareChooserTargetService" …

我找不到合适的解决方案.下面的代码给了我本地IP地址(如果我连接到Wifi,它提供的IP地址如192.168.0.x),但我想要公共IP地址(就像我在谷歌搜索"我的IP是什么")

public static String getLocalIpAddress() {
try {
    for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
        NetworkInterface intf = en.nextElement();
        for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
            InetAddress inetAddress = enumIpAddr.nextElement();
            if (!inetAddress.isLoopbackAddress() && inetAddress instanceof Inet4Address) {
                return inetAddress.getHostAddress();
            }
        }
    }
} catch (SocketException ex) {
    ex.printStackTrace();
}
return null;
}

要么

WifiManager wm = (WifiManager) getSystemService(WIFI_SERVICE);
    String ip = Formatter.formatIpAddress(wm.getConnectionInfo().getIpAddress());

有人可以帮忙吗？谢谢!