内部片段用法示例。

import android.content.pm.PackageManager;
.......

private String VersionName;
private String VersionCode;
.......


Context context = getActivity().getApplicationContext();

/* Getting application version name and code */
try
{
     VersionName = context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionName;

     /* I find it useful to convert vervion code into String,
        so it's ready for TextViev/server side checks
     */

     VersionCode = Integer.toString(context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionCode);
}
catch (PackageManager.NameNotFoundException e)
{
     e.printStackTrace();
}

// Do something useful with that

这是一个干净的解决方案，基于scottyab（由哈维编辑）的解决方案。它显示了如果方法没有提供上下文，如何首先获取上下文。此外，它使用多行而不是每行调用多个方法。这使您在调试应用程序时更容易。

Context context = getApplicationContext(); // or activity.getApplicationContext()
PackageManager packageManager = context.getPackageManager();
String packageName = context.getPackageName();

String myVersionName = "not available"; // initialize String

try {
    myVersionName = packageManager.getPackageInfo(packageName, 0).versionName;
} catch (PackageManager.NameNotFoundException e) {
    e.printStackTrace();
}

现在您在StringmyVersionName中收到了版本名，您可以将其设置为TextView或任何您喜欢的内容。。

// Set the version name to a TextView
TextView tvVersionName = (TextView) findViewById(R.id.tv_versionName);
tvVersionName.setText(myVersionName);

如果要在XML内容上使用它，请在Gradle文件中添加以下行：

applicationVariants.all { variant ->
    variant.resValue "string", "versionName", variant.versionName
}

然后将其用于XML内容，如下所示：

<TextView
        android:gravity="center_horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/versionName" />

始终使用try-catch块：

String versionName = "Version not found";

try {
    versionName = context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionName;
    Log.i(TAG, "Version Name: " + versionName);
} catch (NameNotFoundException e) {
    // TODO Auto-generated catch block
    Log.e(TAG, "Exception Version Name: " + e.getLocalizedMessage());
}

    Log.e("TAG","VERSION.RELEASE {" + Build.VERSION.RELEASE + "}");
    Log.e("TAG","\nVERSION.INCREMENTAL {" + Build.VERSION.INCREMENTAL + "}");
    Log.e("TAG","\nVERSION.SDK {" + Build.VERSION.SDK + "}");
    Log.e("TAG","\nBOARD {" + Build.BOARD + "}");
    Log.e("TAG","\nBRAND {" + Build.BRAND + "}");
    Log.e("TAG","\nDEVICE {" + Build.DEVICE + "}");
    Log.e("TAG","\nFINGERPRINT {" + Build.FINGERPRINT + "}");
    Log.e("TAG","\nHOST {" + Build.HOST + "}");
    Log.e("TAG","\nID {" + Build.ID + "}");

幸亏https://stackoverflow.com/a/40421709/2828651

我已经通过使用Preference类解决了这个问题。

package com.example.android;

import android.content.Context;
import android.preference.Preference;
import android.util.AttributeSet;

public class VersionPreference extends Preference {
    public VersionPreference(Context context, AttributeSet attrs) {
        super(context, attrs);
        String versionName;
        final PackageManager packageManager = context.getPackageManager();
        if (packageManager != null) {
            try {
                PackageInfo packageInfo = packageManager.getPackageInfo(context.getPackageName(), 0);
                versionName = packageInfo.versionName;
            } catch (PackageManager.NameNotFoundException e) {
                versionName = null;
            }
            setSummary(versionName);
        }
    }
}