清单文件必须添加
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
...
<queries>
<package android:name="com.whatsapp" />
<package android:name="com.facebook.katana" />
<package android:name="org.telegram.messenger" />
</queries>
</manifest>
判断App是否安装
public static boolean isAppInstalled(Context context, String packageName) {
PackageInfo packageInfo;
try {
packageInfo = context.getPackageManager().getPackageInfo(packageName, 0);
} catch (PackageManager.NameNotFoundException e) {
packageInfo = null;
e.printStackTrace();
}
return packageInfo != null;
}
