有这样的应用场景，apk安装成功后需要重启APP，就需要监听完成安装的回调或者广播

public class UpdateReceiver extends BroadcastReceiver {

private static final String TAG = "UpdateReceiver";

@Override public void onReceive(Context context, Intent intent) {

String action = intent.getAction();

if (Intent.ACTION_PACKAGE_REPLACED.equals(action) || Intent.ACTION_MY_PACKAGE_REPLACED.equals(

action)) {

try {

String scheme = intent.getScheme();

String packageName = intent.getData().getSchemeSpecificPart();

if (context.getPackageName().equals(packageName)) {

Toast.makeText(context, "成功升级新版本!", Toast.LENGTH_SHORT).show();

Intent intent1 = new Intent(context, FlashActivity.class);

intent1.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

context.startActivity(intent1);

}

LogMgr.d(TAG, "收到 ACTION_PACKAGE_REPLACED");

LogMgr.d(TAG, " scheme=" + scheme);

LogMgr.d(TAG, " schemeSpecificPart=" + packageName);

} catch (Exception e) {

e.printStackTrace();

}

}

}

}

这里提供一个在开发过程中用到的一个静默安装的方法，不一定适用于所有的设备：

public static void silentInstallApkByReflect(String apkPath) {

PackageManager packageManager = ContextUtils.getContext().getPackageManager();

Class> pmClz = packageManager.getClass();

try {

if (Build.VERSION.SDK_INT >= 21) {

Class> aClass = Class.forName("android.app.PackageInstallObserver");

Constructor> constructor = aClass.getDeclaredConstructor();

constructor.setAccessible(true);

Object installObserver = constructor.newInstance();

Method method =

pmClz.getDeclaredMethod("installPackage", Uri.class, aClass, int.class, String.class);

method.setAccessible(true);

method.invoke(packageManager, Uri.fromFile(new File(apkPath)), installObserver, 2, null);

} else {

Method method = pmClz.getDeclaredMethod("installPackage", Uri.class,

Class.forName("android.content.pm.IPackageInstallObserver"), int.class, String.class);

method.setAccessible(true);

method.invoke(packageManager, Uri.fromFile(new File(apkPath)), null, 2, null);

}

} catch (Exception e) {

e.printStackTrace();

}

}