User versionName value of AndroidManifest.xml in code

The AndroidManifest.xml contains the version name of the application, something like

android:versionName="1.0"

Now the question - is it somehow possible to access this version name in the source code, so that I can display it for example in an About Dialog ?

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If you use ADT and Eclipse:

String version = getPackageManager().getPackageInfo(getPackageName(), 0).versionName;

If you use Gradle, there is an easier way, since it puts the data into BuildConfig for you:

String version = BuildConfig.VERSION_NAME;

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Konstantin的答案（上面）是正确的，但是如果我没有发现NameNotFoundException ，我发现我收到了一个编译器错误，如下所示：

import android.content.pm.PackageManager.NameNotFoundException;
try {
    String version = getPackageManager().getPackageInfo(getPackageName(), 0).versionName;
} catch (NameNotFoundException e) {
    Log.e("tag", e.getMessage());
}

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